Waterborne Resin Application Guide: Formulation Synergy, Troubleshooting, and Technology Development Trends

1 The Performance of Waterborne Resins Depends on System-Level Synergy

1.1 Resin determines the performance ceiling, while formulation synergy determines performance realization

Waterborne resin is the core source of performance in waterborne coatings, but the final coating film performance is not determined by the resin alone. The same waterborne resin may show completely different storage stability, application performance, film-forming behavior, and dry-film properties under different additive systems, pigment and filler systems, substrate conditions, and application conditions.

Waterborne coatings are multi-component systems. Resins need to work together with dispersants, defoamers, wetting agents, rheology modifiers, coalescing agents, preservatives and mildewcides, flash-rust inhibitors, pigments and fillers, pH adjusters, and other components in order to form a stable, uniform, dense coating film that meets application requirements.

Influencing Dimension	Main Role
Resin	Determines the performance foundation for adhesion, hardness, flexibility, water resistance, weather resistance, chemical resistance, and related properties
Additives	Regulate dispersion, wetting, defoaming, rheology, film formation, preservation, and application performance
Pigments and fillers	Affect hiding power, gloss, scrub resistance, cost, water absorption, and film structure
Substrate	Affects wetting, adhesion, penetration, drying, and interfacial stability
Application environment	Affects water evaporation, film-forming integrity, surface defects, and performance development

1.2 Waterborne systems depend more heavily on formulation balance

Waterborne coatings use water as the main medium. Water has high surface tension, and its evaporation rate is significantly affected by the environment. At the same time, resin particles and pigment/filler surfaces may carry charges or contain hydrophilic structures. Therefore, compared with solventborne systems, waterborne systems generally depend more heavily on additive balance and control of application conditions. Common formulation-sensitive points in waterborne systems include:

① Foam is easier to generate and more difficult to eliminate completely.

In waterborne systems, dispersants, wetting agents, emulsifiers, and thickeners can easily stabilize foam. Insufficient defoaming may cause pinholes and surface defects, while excessive defoaming may lead to cratering and gloss reduction.

② Substrate wetting is more challenging.

Because water has relatively high surface tension, it may not wet low-surface-energy substrates, contaminated substrates, or dense substrates sufficiently. Suitable wetting agents are needed to help spreading.

③ pH has a significant impact on system stability.

Many waterborne resins, thickeners, dispersants, and preservatives are sensitive to pH. pH drift may cause viscosity changes, flocculation, instability, or reduced preservation efficiency.

④ Film formation is strongly affected by temperature and humidity.

Low temperature, high humidity, thick application, and insufficient ventilation may all affect water release and resin-particle coalescence, resulting in incomplete film formation.

⑤ Hydrophilic components may affect water resistance.

Excessive emulsifiers, dispersants, protective colloids, water-soluble thickeners, and hydrophilic additives may increase the risk of water absorption, whitening, and reduced water resistance of the coating film.

2 Key Variables in Waterborne Resin Formulation Synergy

2.1 Resin parameters are the starting point for formulation design

Before designing a formulation, the basic parameters of the resin should first be clarified. Different parameters determine the applicable scope and potential risks of the resin in the formulation.

Resin Parameter	Formulation Significance
Solids content	Affects formulation space, drying speed, application efficiency, and cost
pH	Affects resin stability, thickening efficiency, compatibility with pigments and fillers, and preservation performance
Viscosity	Affects production, storage, pumping, and application methods
Particle size	Affects gloss, transparency, penetration, stability, and film-forming density
Glass transition temperature, Tg	Affects hardness, flexibility, block resistance, low-temperature film formation, and stain resistance
Minimum film-forming temperature, MFFT	Affects low-temperature application and film-forming integrity
Ionic character	Affects compatibility with dispersants, thickeners, pigments/fillers, and electrolytes
Functional groups	Affect adhesion, crosslinking, water resistance, solvent resistance, and chemical resistance
Stability indicators	Affect freeze-thaw stability, heat storage stability, mechanical shear resistance, and long-term storage reliability

2.2 The additive system determines application performance and stability

Additives are not merely auxiliary materials. They are important conditions that determine whether a waterborne resin can be processed, stored, applied, and formed into a film in a stable manner. Improper additive selection may mask the advantages of the resin or even amplify its weaknesses.

Additive Type	Main Function	Use Risk
Dispersant	Helps wet, disperse, and stabilize pigments and fillers	Excessive use may increase water sensitivity, foam, or reduce water resistance
Wetting agent	Improves substrate wetting, leveling, and spreading	Excessive use may cause foam, cratering, or reduced water resistance
Defoamer	Suppresses foam during production and application	Incompatibility or excessive use may cause cratering, fisheyes, and gloss reduction
Rheology modifier	Adjusts viscosity, leveling, sag resistance, and application feel	Improper selection may cause abnormal thickening, poor leveling, or viscosity drift during storage
Coalescing agent	Reduces film-forming difficulty and improves low-temperature film formation	May increase VOC, odor, slow drying, and insufficient early hardness
Preservative and mildewcide	Prevents in-can spoilage and dry-film mold growth	pH, regulations, compatibility, and long-term effectiveness need to be considered
Flash-rust inhibitor	Suppresses flash rust during waterborne application on metal substrates	May affect drying, adhesion, or water resistance and requires system verification
pH adjuster	Adjusts stability, thickening efficiency, and application performance	Excessive use may cause odor, corrosion risk, or reduced water resistance

The principle for additive use is “sufficient but not excessive.” Many problems in waterborne coatings are not caused by insufficient additives, but by poor compatibility among additives, unbalanced dosage, or unreasonable order of addition.

2.3 Pigment and filler systems affect film structure

Pigments and fillers not only affect color, hiding power, and cost, but also influence film formation, water resistance, scrub resistance, gloss, and storage stability of waterborne resins.

Pigment/Filler Factor	Impact
Particle size and particle size distribution	Affect hiding power, gloss, settling, and film density
Oil absorption	Affects resin demand, viscosity, rheology, and dry-film strength
Surface treatment	Affects dispersion stability, water resistance, weather resistance, and compatibility
pH and soluble salts	Affect emulsion stability, thickening systems, and corrosion risk
Pigment volume concentration, PVC	Affects hiding power, porosity, water resistance, scrub resistance, and mechanical properties
Critical pigment volume concentration, CPVC	When approaching or exceeding CPVC, the resin continuous phase becomes insufficient, and film porosity, water absorption, and permeability usually increase, while water resistance, scrub resistance, corrosion resistance, and mechanical strength may decrease

In high-PVC systems, insufficient resin content or unreasonable packing of pigments and fillers may increase coating film porosity, reducing water resistance, stain resistance, and strength. In low-PVC or high-gloss systems, resin film formation, leveling, defoaming, and particle-size control are more critical.

2.4 Substrate condition affects adhesion and film formation

Waterborne coatings are relatively sensitive to substrate condition. The water absorption, surface energy, roughness, contaminants, alkalinity, and corrosion condition of the substrate all affect coating adhesion and the drying process.

Substrate Type	Main Points of Concern
Cementitious substrates	Alkalinity, water absorption, moisture content, chalking, efflorescence
Wood	Water absorption, tannins, oils, pores, moisture content
Metal	Surface rust, oil contamination, flash rust, roughness, phosphating or sandblasting treatment
Plastics	Low surface energy, difficult wetting and adhesion
Leather and textiles	Flexibility, penetration, hand feel, flex resistance, and washing resistance
Paper and packaging materials	Water absorption, drying speed, adhesion, redissolution, and regulatory requirements

2.5 Application environment affects film-forming integrity

Temperature, humidity, ventilation, film thickness, and application method directly affect water evaporation, particle coalescence, surface leveling, and later performance development. Even if the resin has excellent inherent properties, film-forming defects may still occur if the application temperature is lower than the film-forming requirement or if humidity is too high.

Application Factor	Possible Impact
Low temperature	Incomplete film formation, chalking, cracking, slow hardness development
High humidity	Slow water release, whitening, slow drying, slow development of water resistance
Insufficient ventilation	Slow release of water and volatile components; delayed surface drying and through-drying
Excessive film thickness	Uneven internal and external drying; prone to whitening, cracking, pinholes, or softening
Excessively fast application	Insufficient leveling, lap marks, entrained foam
Low substrate temperature	Affects water evaporation and interfacial film formation

3 Root Causes and Diagnostic Methods for Common Problems

3.1 Poor film formation, whitening, chalking, and cracking

One common issue with waterborne resins is incomplete film formation. Poor film formation may appear as whitening, chalking, cracking, gloss reduction, poor transparency, or insufficient water resistance.

Phenomenon	Possible Cause	Diagnostic Focus
Whitening	High humidity, residual water in the film, incomplete film formation, excessive hydrophilic components	Observe drying conditions, film thickness, resin MFFT, and dosage of hydrophilic additives
Chalking	Application temperature is below the film-forming requirement, and particles have not fully coalesced	Check application temperature, MFFT, coalescing agent, and drying time
Cracking	Resin is too hard, film thickness is excessive, drying shrinkage stress is high	Check Tg, film thickness, substrate water absorption, and application method
Low gloss	Film is not dense, foam, poor pigment/filler dispersion	Check particle size, defoaming, dispersion, and leveling
Poor transparency	Particles have not fully coalesced, pores remain in the film, or compatibility is poor	Check film-forming temperature, resin compatibility, and additive residues

For film-formation problems, priority should be given to checking application temperature, humidity, film thickness, resin MFFT, Tg, and coalescing agent. If these factors show no obvious abnormality, further investigation should be conducted into pigments and fillers, additive compatibility, and substrate condition.

3.2 Insufficient water resistance, whitening resistance, and alkali resistance

Insufficient water resistance is common in architectural coatings, wood coatings, metal coatings, and packaging coatings. Water-resistance problems in waterborne systems are usually related to hydrophilic residues, film density, degree of crosslinking, and pigment/filler structure.

Possible Cause	Specific Manifestation
High level of residual hydrophilic groups or emulsifier	Increased water absorption; whitening or softening upon contact with water
Excessive dispersant, wetting agent, or thickener	Increased water sensitivity; reduced water resistance and scrub resistance
Incomplete film formation	Many pores in the film, allowing water to enter easily
Insufficient crosslinking	Coating film easily swells in water or solvent
Excessively high PVC	Increased film porosity and reduced water resistance
Strong substrate alkalinity	Affects resin and additive stability, resulting in insufficient alkali resistance

When diagnosing water-resistance problems, two situations should be distinguished: one is insufficient intrinsic water resistance of the resin itself, and the other is film water absorption caused by film formation or formulation factors. Insufficient intrinsic water resistance of the resin should be evaluated from the resin structure and crosslinking capability. Film water absorption caused by film formation or formulation should be examined through additives, pigments/fillers, PVC, and application conditions.

3.3 Cratering, fisheyes, poor leveling, and insufficient wetting

Cratering and fisheyes are usually related to surface-tension differences, substrate contamination, additive incompatibility, or improper use of defoamers. Poor leveling may result from excessively high viscosity, insufficient open time, an unsuitable rheology system, or insufficient substrate wetting. These problems do not necessarily originate from the resin itself. In many cases, substrate treatment, additive compatibility, and the application environment are the main causes.

Problem	Possible Cause	Diagnostic Focus
Cratering	Oil contamination on substrate, incompatible defoamer, uneven surface tension	Check substrate cleanliness, defoamer type, and wetting-agent matching
Fisheyes	Oil contamination, silicone contamination, localized low-surface-energy substances	Check production equipment, substrate, and application-environment contamination
Poor leveling	Excessively high viscosity, short open time, unsuitable rheology system	Check rheology modifier, application viscosity, and drying speed
Insufficient wetting	Low substrate surface energy, insufficient or mismatched wetting agent	Check contact angle, spreading behavior, and adhesion

3.4 Foam, pinholes, and surface defects

Waterborne coatings can easily entrain air during production and application. If foam is not broken in time, it may form pinholes, craters, gloss reduction, or film defects. The defoaming system needs to balance “foam-breaking ability” and “surface compatibility.” Insufficient defoamer use can lead to foam, while excessive or improperly selected defoamer may cause cratering, fisheyes, and gloss reduction.

Problem	Possible Cause
Excessive foam during production	Dispersants, wetting agents, and emulsifiers have strong foaming tendency; high mixing shear
Excessive foam during application	Roller coating, brushing, or spraying entrains air
Difficult defoaming	Thickening system stabilizes foam; defoamer is not well matched
Pinholes	Incomplete foam rupture; difficult gas release inside thick films
Cratering accompanied by foam	Excessive defoamer use or poor compatibility

3.5 Insufficient adhesion

Insufficient adhesion may arise from the resin structure, but it may also result from substrate condition, insufficient wetting, application conditions, or film-formation shrinkage. When diagnosing adhesion problems, substrate condition should be investigated first, followed by the resin and additives. If the substrate is contaminated or has insufficient surface energy, adhesion failure may occur even when the resin itself has good adhesion performance.

Possible Cause	Specific Explanation
Substrate contamination	Oil, dust, release agents, and old coating residues affect interfacial bonding
Insufficient wetting	The waterborne system cannot fully spread and penetrate
Mismatched resin functional groups	Lack of structures that can form effective interactions with the substrate
High film-formation shrinkage stress	Drying shrinkage increases interfacial stress
High substrate moisture content or alkalinity	Affects drying, film formation, and interfacial stability
Insufficient substrate treatment	Metal not derusted, wood not sanded, cementitious substrate not sealed

3.6 Storage stability, abnormal thickening, and spoilage

During storage, waterborne coatings may show settling, phase separation, demulsification, viscosity increase, viscosity decrease, spoilage, odor, or agglomeration. Storage-stability problems should be comprehensively evaluated through heat storage, freeze-thaw testing, centrifugation, mechanical stability, and microbial control. In waterborne systems, pH, preservatives, thickeners, and the dispersion state of pigments and fillers have significant effects on long-term stability.

Problem	Possible Cause
Viscosity increase	pH drift, post-thickening by thickeners, pigment/filler flocculation, electrolyte influence
Viscosity decrease	Thickener failure, microbial degradation, shear damage
Phase separation and settling	Insufficient pigment/filler dispersion, density difference, unsuitable rheology system
Demulsification and flocculation	Electrolytes, multivalent ions, pH shift, additive incompatibility
Spoilage and odor	Insufficient preservation system; production or packaging contamination
Freeze-thaw instability	Insufficient emulsion freeze-thaw stability; improper low-temperature transport or storage

4 From Problem Diagnosis to Formulation Adjustment

4.1 Troubleshooting should follow a logical sequence

When problems occur in waterborne coatings, they should not be directly attributed to the resin, nor should additives be blindly increased. A more reasonable diagnostic sequence is as follows:

Troubleshooting Sequence	Items to Confirm
Step 1	Whether the substrate is acceptable: cleanliness, moisture content, alkalinity, roughness, surface energy
Step 2	Whether application conditions are suitable: temperature, humidity, ventilation, film thickness, drying time
Step 3	Whether resin parameters are matched: Tg, MFFT, particle size, pH, functional groups, stability
Step 4	Whether additives are compatible: dispersant, wetting agent, defoamer, rheology modifier, coalescing agent
Step 5	Whether pigments and fillers are reasonable: PVC, oil absorption, dispersion state, pH, soluble salts
Step 6	Whether production and storage are controlled: order of addition, shear, filtration, preservation, packaging

4.2 Adjustment directions for common problems

Problem	Priority Items to Check	Adjustment Direction
Poor low-temperature film formation	MFFT, application temperature, coalescing agent	Select a low-MFFT resin, optimize the coalescing agent, and control temperature and humidity
Poor water resistance	Hydrophilic additives, PVC, crosslinking, film density	Reduce water-sensitive additives, select a water-resistant resin, and improve crosslinking or film density
Cratering	Substrate contamination, defoamer, wetting agent	Clean the substrate and adjust the matching of wetting agent and defoamer
Excessive foam	Dispersant, wetting agent, thickener, application method	Optimize the defoamer combination and reduce the influence of high-foaming additives
Poor leveling	Viscosity, open time, rheology system	Adjust the rheology modifier and optimize application viscosity and drying speed
Poor adhesion	Substrate, wetting, functional groups, film-formation shrinkage	Improve substrate treatment and select a resin or additive with better adhesion
Poor storage stability	pH, thickener, pigments/fillers, electrolytes, preservation	Optimize pH and dispersion system, and carry out heat-storage and freeze-thaw verification
Poor corrosion protection / poor rust prevention / insufficient salt-spray resistance	Resin type, pigments/fillers, flash-rust inhibitor, film density	Select waterborne epoxy or corrosion-protective resin, and optimize flash-rust inhibition and barrier systems

When adjusting a formulation, targeted measures should be selected according to the root cause. Simply increasing the dosage of a particular additive may improve one problem while causing new ones.

5 Waterborne Resin Technology Development Trends: From Formulation Optimization to Structural Design

5.1 Technology upgrade trends for waterborne resins

The direction of technology upgrading for waterborne resins usually comes from performance limitations encountered in practical applications. For example, it can be difficult to balance low-temperature film formation with high hardness; water-whitening resistance may be insufficient; chemical resistance may be inadequate; low VOC requirements may conflict with film-forming performance; and a single resin may not provide balanced performance. These issues are driving the development of next-generation waterborne resin technologies.

Practical Pain Point	Technology Upgrade Direction
Poor low-temperature film formation while high hardness is required	Low-MFFT, high-hardness emulsions; core-shell structures; gradient structures
Water whitening and water sensitivity	Self-crosslinking, hydrophobic modification, reactive emulsifiers, low hydrophilic residues
Insufficient chemical and solvent resistance	2K waterborne polyurethane, waterborne epoxy, highly crosslinked systems
Difficulty balancing flexibility and hardness	PUD-acrylic hybrids, soft/hard segment design, core-shell structures
Conflict between low VOC and film formation	Low-VOC film-forming technology, high-solids and low-viscosity dispersions
Insufficient corrosion-protection performance	Waterborne epoxy, epoxy-acrylic hybrids, dense barrier systems
Increasing sustainability requirements	Bio-based raw materials, low-carbon resins, APEO-free systems, NMP-free systems

5.2 Low-VOC, low-coalescent, and traditional coalescent-free directions

To improve low-temperature film formation, traditional waterborne emulsions often require a certain amount of coalescing agent. However, coalescing agents may increase VOC, odor, and post-drying residues. Technical directions for reducing VOC and reducing dependence on traditional coalescing agents mainly include:

① Optimizing the balance between resin Tg and MFFT.

Through monomer design, core-shell structures, or multiphase structures, the resin can form a film at lower temperatures while maintaining dry-film hardness.

② Developing low-MFFT, high-hardness emulsions.

Through particle-structure design, particles can coalesce more easily during film formation, while still achieving high block resistance and stain resistance after drying.

③ Reducing highly volatile co-solvents and traditional coalescing agents.

By improving the resin’s inherent film-forming ability, the dependence on externally added coalescing agents can be reduced.

④ Increasing solids content while reducing system viscosity.

High-solids, low-viscosity resins help reduce the burden of water evaporation, improve application efficiency, and provide formulation space for low-VOC systems.

5.3 Self-crosslinking and highly crosslinked waterborne systems

Self-crosslinking and external crosslinking are important approaches for improving the water resistance, solvent resistance, chemical resistance, and block resistance of waterborne coating films.

Crosslinking Direction	Main Value	Points of Concern
Self-crosslinking acrylic	Improves water resistance, block resistance, stain resistance, and early-stage performance	Storage stability, reaction conditions, flexibility
Keto-hydrazide crosslinking system	Can form crosslinks during room-temperature drying	pH, reaction rate, and degree of water-resistance improvement
Waterborne epoxy-amine system	Good adhesion, corrosion protection, and chemical resistance	Pot life, low-temperature curing, accurate mixing ratio
2K waterborne polyurethane	Good hardness, abrasion resistance, chemical resistance, and appearance	Mixing ratio, pot life, application management
Amino crosslinking system	Suitable for industrial baking; improves hardness and resistance properties	Baking conditions, acid catalysis, emission control

5.4 Hybrid resins for performance balance

A single resin often struggles to simultaneously meet requirements for hardness, flexibility, water resistance, abrasion resistance, chemical resistance, low VOC, and cost. Hybrid resins achieve performance complementarity through structural combination or particle combination.

Hybrid Direction	Problem Addressed
PUD-acrylic hybrid	Balances flexibility, abrasion resistance, hardness, and cost
Epoxy-acrylic hybrid	Improves adhesion, corrosion protection, and application adaptability
Alkyd-acrylic hybrid	Balances leveling, drying, weather resistance, and decorative performance
Silicone-acrylic hybrid	Improves water resistance, weather resistance, and dirt-pickup resistance
Inorganic-organic hybrid	Improves hardness, heat resistance, stain resistance, or abrasion resistance

5.5 High-performance protective coatings and industrial waterborne conversion

Waterborne resins are expanding into more industrial and protective-coating fields. Compared with architectural coatings, industrial and protective coatings generally have higher requirements for corrosion resistance, chemical resistance, abrasion resistance, hardness, appearance, and application stability. Major technical directions include: waterborne epoxy anti-corrosion systems; waterborne epoxy-acrylic hybrid systems; 2K waterborne polyurethane topcoats; waterborne hydroxy acrylic crosslinking systems; high-solids waterborne industrial resins; fast-drying waterborne industrial coatings; low-temperature-curing waterborne systems; and highly barrier-effective pigment/filler synergistic systems.

The focus of industrial waterborne conversion is to meet protection and durability requirements on the basis of environmental friendliness, safety, and controllable application.

5.6 Sustainability and compliance directions

The sustainability of waterborne resins includes not only VOC reduction, but also raw material sources, production processes, use safety, and regulatory compliance. Low VOC, low odor, low toxicity, renewable raw materials, long-life coatings, and lower maintenance frequency are all important directions for the sustainable development of waterborne resins.

Direction	Main Content
Low VOC / near-zero VOC	Reduce co-solvents and coalescing agents to lower emissions and odor
APEO-free	Avoid the use of alkylphenol ethoxylate surfactants
NMP-free	Reduce or avoid the use of NMP in systems such as polyurethane dispersions
Bio-based raw materials	Use renewable-source monomers, glycols, vegetable oils, or modified raw materials
Low free monomer content	Reduce residual monomers and odor
Safer preservation systems	Balance preservation efficiency, regulatory restrictions, and use safety
Recyclable and degradable directions	Target packaging, paper, and sustainable-material applications

6 Evaluation Framework for Effective Use of Waterborne Resins

6.1 From “resin matching” to “system matching”

Successful application of waterborne resins requires matching at three levels:

Matching Level	Evaluation Content
Resin-application matching	Whether resin performance meets the requirements of the target substrate and service environment
Resin-formulation matching	Whether the resin is compatible with additives, pigments/fillers, pH, and rheology system
Formulation-application matching	Whether the formulation is suitable for on-site temperature and humidity, application method, and drying conditions

If only the first level is satisfied, problems may still occur in actual production and application. For example, even if the resin itself has good water resistance, the final coating film may still show poor water resistance if the formulation contains excessive hydrophilic additives, PVC is too high, or film formation is incomplete.

6.2 Checklist before using a waterborne resin

Check Item	Questions to Confirm
Resin form	Is it an emulsion, dispersion, water-reducible resin, or hybrid system?
Resin parameters	Solids content, pH, viscosity, particle size, Tg, MFFT, functional groups
Application requirements	Target substrate, service environment, main performance indicators
Additive compatibility	Whether dispersant, wetting agent, defoamer, and thickener are well matched
Pigment/filler adaptability	Dispersion stability, PVC, oil absorption, pH, and soluble salts
Film-forming conditions	Temperature, humidity, film thickness, drying time
Storage stability	Heat storage, freeze-thaw, centrifugation, mechanical stability, preservation effect
Application verification	Brushing, roller coating, spraying, or industrial-line application performance
Dry-film testing	Adhesion, hardness, flexibility, water resistance, scrub resistance, chemical resistance, etc.
Long-term performance	Weather resistance, corrosion resistance, damp-heat resistance, aging resistance, and actual service performance

7 Classification and Selection Reference for Representative Chemicals Related to Waterborne Coating Formulations

Note: The following are representative chemicals related to waterborne resin and waterborne coating formulation research, additive screening, mechanism verification, and performance evaluation. They are not equivalent to products that can all be used directly as commercial additives in final coating formulations. Actual application should be confirmed based on formulation compatibility, safety data sheets, target-market regulations, and application test results.

Table 1 Dispersing, Wetting, Defoaming, pH Adjustment, and Chelating Auxiliary Products

Category	CAS No.	Aladdin Catalog No.	Name	Specification or Purity	Product Features and Applications
Defoaming and anti-foaming agent	63148-62-9	S433164	Silicone oil	Viscosity 5 cSt, 25°C	Used for defoaming, anti-foaming, surface-defect control, and defoaming-system screening in waterborne coatings
Anionic wetting/emulsifying agent	151-21-3	S432157	Sodium dodecyl sulfate, SDS	Anhydrous grade, ACS, ≥99%	Used in emulsion polymerization, pigment and filler wetting, surfactant screening, and research on waterborne dispersion systems
pH adjuster	1310-73-2	S431793	Sodium hydroxide	Anhydrous grade, ≥98%, pellets	Used for pH adjustment in waterborne systems, neutralization of alkali-soluble resins, dispersant activation, and stability experiments
Chelating and dispersing auxiliary	527-07-1	G432830	Sodium gluconate	Suitable for synthesis	Used for metal-ion chelation, auxiliary dispersion, corrosion-inhibition research, and stability evaluation of waterborne systems
Amine pH adjuster	102-71-6	T478536	Triethanolamine	Reagent grade, ≥98%	Used for pH adjustment in waterborne coatings, pigment and filler dispersion, amine-neutralized systems, and application-stability research
Wetting-additive intermediate	104-76-7	E101076	2-Ethylhexanol	Reagent grade	Used in the synthesis of wetting agents, defoamers, ester additives, and research on surface control in waterborne coatings
Polycarboxylate dispersant	9003-04-7	P434409	Sodium polyacrylate, PAAS	Average Mw ~8000, 45% in H₂O	Used for pigment and filler dispersion, stabilization of titanium dioxide and inorganic fillers, storage-stability research, and evaluation of effects on water resistance
Amine pH adjuster	108-01-0	D109080	N,N-Dimethylethanolamine, DMEA	Rectified grade, ≥99.5%	Used for neutralization of waterborne resins, pH adjustment, emulsion stabilization, and comparative studies on amine volatility
Corrosion-inhibition auxiliary	532-32-1	S104125	Sodium benzoate	Chemical pure, CP, ≥99%	Used in waterborne metal coatings for corrosion inhibition, flash-rust prevention assistance, and storage-stability research
Anionic wetting agent	577-11-7	A106730	Sodium bis(2-ethylhexyl) sulfosuccinate, AOT	Moligand™, ≥96%	Used for pigment and filler wetting, low-surface-tension systems, dispersion stability, and substrate-wetting research
Amine pH adjuster	124-68-5	A755868	2-Amino-2-methyl-1-propanol	BioReagent, ≥95%	Used for pH buffering, dispersion stability, low-odor systems, and thickening-efficiency adjustment in waterborne coatings
Inorganic dispersant	7722-88-5	S108847	Sodium pyrophosphate	AR, ≥99%	Used for inorganic pigment and filler dispersion, settling control, and research on waterborne dispersion in ceramics and coatings
Defoaming and anti-foaming agent	126-73-8	T100707	Tributyl phosphate, TBP	AR, ≥99%	Used for anti-foaming, defoaming evaluation, surface-defect control, and additive-compatibility research in waterborne systems
Inorganic dispersant	10124-56-8	S108858	Sodium hexametaphosphate, SHMP	AR	Used for pigment and filler dispersion, calcium and magnesium ion chelation, settling control, and stability research on waterborne slurries
Anionic emulsifying/wetting agent	25155-30-0	S592217	Sodium dodecylbenzenesulfonate, SDBS	Anion active matter, 85%	Used for emulsification, wetting, pigment and filler dispersion, foam-behavior studies, and emulsion-stability research
Acetylenic diol wetting agent	126-86-3	T301607	2,4,7,9-Tetramethyl-5-decyne-4,7-diol, DL-/meso-mixture	≥98%	Used for low-foam wetting, substrate spreading, leveling improvement, and cratering-problem studies

Table 2 Rheology Thickening, Anti-Settling, and Pigment/Filler Products

Category	CAS No.	Aladdin Catalog No.	Name	Specification or Purity	Product Features and Applications
Lamellar filler	14807-96-6	T109493	Talc	Pharmaceutical grade, PharmPure™, ≥325 mesh	Used for filling, hiding assistance, sanding properties, anti-settling, and film-structure research in waterborne coatings
Mineral filler	1332-58-7	K299133	Kaolin	Filler grade, kaolinite content ≥80%	Used as a filler in architectural coatings, for hiding assistance, rheology adjustment, scrub resistance, and cost control
Cellulose ether thickener	9004-65-3	H1506257	Hydroxypropyl methylcellulose, HPMC	Substitution type 2910; viscosity: 400 mPa·s; methoxy: 28–30%; hydroxypropyl: 7.0–12%	Used for thickening, water retention, sag resistance, application feel, and storage-stability research in waterborne coatings
Inorganic thixotropic agent	7631-86-9	S104578	Silicon dioxide	PrimorTrace™, ≥99.99% metals basis; particle size: 2 μm	Used for rheology adjustment, anti-settling, thixotropy, matting, and film-surface-structure research
Bio-based rheology additive	11138-66-2	G104873	Xanthan gum	PharmPure™, USP	Used for thickening, suspension stability, low-shear viscosity adjustment, and anti-settling research in waterborne systems
Organobentonite	1302-78-9	B102861	Bentonite	Bentone SD-2, suitable for medium- to high-polarity solvents	Suitable for medium- to high-polarity solvents; mainly used for anti-settling, thixotropy, and application-rheology research in coatings based on medium- to high-polarity organic media. Use in waterborne systems requires separate verification of dispersion, activation, and compatibility
Cellulose ether thickener	9004-62-0	H434475	2-Hydroxyethyl cellulose, HEC	Average Mw ~380,000	Used for thickening, sag resistance, application rheology, emulsion stability, and storage-viscosity research in waterborne coatings
White pigment	13463-67-7	T105418	Titanium dioxide	AR, ≥99%	Used for research on hiding power, whiteness, gloss, dispersibility, and weather resistance in white waterborne coatings
Functional filler	1314-13-2	Z111836	Zinc oxide	AR, ≥99%	Used for mildew-control assistance, UV shielding, and functional filler research in rubber and coatings
Inorganic pigment	1309-37-1	F108908	Iron(III) oxide	≥99.9% metals basis	Used in anti-rust pigments, coloring systems, metal primers, and weather-resistant coatings research
Extender pigment	7727-43-7	B112377	Ultrafine barium sulfate	≥99%, 2 μm	Used for filling, gloss control, chemical resistance, settling control, and coating-film densification research
Extender pigment	471-34-1	C432743	Calcium carbonate	≥98%, powder, ≤50 μm	Used for filling, cost control, PVC adjustment, hiding assistance, and scrub-resistance research in architectural coatings

Table 3 Coalescing Agents, Co-Solvents, and Application-Window Adjustment Products

Category	CAS No.	Aladdin Catalog No.	Name	Specification or Purity	Product Features and Applications
Humectant co-solvent	57-55-6	P432968	1,2-Propanediol	Basic reagent grade, for preparation	Used for moisture retention, open-time adjustment, freeze-thaw stability, and film-forming assistance research in waterborne coatings
Coalescing agent	25265-77-4	T103778	2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate	≥99%	Used for low-temperature film formation, particle coalescence, MFFT adjustment, and film-integrity research in emulsion coatings
Coalescing agent	29911-28-2	D133306	Dipropylene glycol butyl ether, DPNB	≥98%, mixture of isomers	Used for film formation, leveling, open-time adjustment, and low-temperature application-performance research in waterborne coatings
Co-solvent	34590-94-8	D108833	Dipropylene glycol methyl ether	≥98%	Used for co-solvency, open time, leveling, and resin-compatibility research in waterborne industrial coatings
Coalescing agent	770-35-4	P135297	1-Phenoxy-2-propanol	≥93%, GC	Used for film formation, co-solvency, leveling, resin compatibility, and application-window research in waterborne coatings

Table 4 Preservatives, Mildewcides, Corrosion Inhibitors, Flash-Rust Inhibitors, and Anti-Corrosion Pigments

Category	CAS No.	Aladdin Catalog No.	Name	Specification or Purity	Product Features and Applications
Corrosion inhibitor	7631-95-0	S433698	Sodium molybdate	Anhydrous grade, ≥99.9% metals basis, powder, >100 mesh	Used for corrosion inhibition, flash-rust prevention, salt-spray resistance, and corrosion-protection system research in waterborne metal coatings
Anti-corrosion pigment	13939-25-8	A302801	Aluminum tripolyphosphate	P₂O₅ content 60–70%	Used in waterborne anti-corrosion primers, barrier protection, metal corrosion protection, and environmentally friendly anti-rust pigment research
Mildewcide and antibacterial agent	13463-41-7	H122405	Zinc 2-mercaptopyridine N-oxide	Moligand™, ≥96%	Used for dry-film mildew resistance, antibacterial coatings, architectural coatings, and functional coating research
In-can preservative	26172-55-4	C183242	Isothiazolinone CMI/MI	Mixture of CMI and MI, 2.0–2.5% in water, pH: 2.0–5.0	Used for in-can preservation, microbial control, storage stability, and preservative-system evaluation in waterborne coatings
Anti-corrosion pigment	7779-90-0	Z112909	Zinc phosphate hydrate	AR, ≥99%	Used in waterborne anti-corrosion primers, metal corrosion inhibition, barrier protection, and anti-rust pigment research
In-can preservative	2634-33-5	B598939	1,2-Benzisothiazol-3(2H)-one	≥99%, metals <3000 ppm	Used for in-can preservation, bacterial inhibition, storage stability, and preservative screening in waterborne coatings
Metal corrosion inhibitor	95-14-7	B101002	Benzotriazole	≥99%	Used for copper and multi-metal corrosion inhibition, waterborne metal coatings, corrosion-inhibition additives, and interfacial protection research
Dry-film mildewcide and algaecide	64359-81-5	D155452	4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one, DCOIT	≥98%, GC	Used in exterior wall coatings, wood coatings, mildew and algae resistance, and dry-film protection research
Metal corrosion inhibitor	29385-43-1	M158120	Methyl-1H-benzotriazole, mixture, TTA	≥98%, GC	Used for copper, zinc, and multi-metal corrosion inhibition, waterborne anti-corrosion systems, and metal-surface protection research
Dry-film mildewcide	26530-20-1	O107425	2-Octyl-4-isothiazolin-3-one, OIT	≥98%	Used in architectural coatings, wood coatings, adhesives, and dry-film mildew-protection research
Flash-rust inhibitor	7632-00-0	S407227	Sodium nitrite	≥98%	Used for flash-rust prevention, corrosion-inhibition systems, metal-interface protection, and anti-rust experiments in waterborne metal coatings
In-can preservative	52-51-7	B114888	Bronopol	≥98%	Used for in-can preservation, microbial inhibition, storage stability, and preservative-compounding research in waterborne coatings
Dry-film mildewcide	55406-53-6	I107478	3-Iodo-2-propynyl N-butylcarbamate, IPBC	≥97%	Used in wood coatings, architectural coatings, adhesives, and dry-film mildew-protection research
In-can preservative	2682-20-4	M110103	2-Methyl-4-isothiazolin-3-one, MIT	≥95%	Used for in-can preservation, bacterial control, storage stability, and preservative evaluation in waterborne coatings

Table 5 Products Related to Crosslinking, Curing, Chemical Resistance, and Weatherability Stabilization

Category	CAS No.	Aladdin Catalog No.	Name	Specification or Purity	Product Features and Applications
Aliphatic diisocyanate	822-06-0	H106723	Hexamethylene diisocyanate, HDI	Moligand™, ≥99%	Used for polyurethane resin synthesis, design of water-dispersible curing agents/crosslinking systems, yellowing resistance, and industrial coatings research; actual application requires attention to safe handling of isocyanates, moisture sensitivity, and pot life
Epoxy resin raw material	1675-54-3	B131786	Bisphenol A diglycidyl ether, BADGE	Moligand™, ≥85%	Used in epoxy resins, waterborne epoxy systems, anti-corrosion coatings, floor coatings, and chemical-resistance research
Hydrazide crosslinker	1071-93-8	A109760	Adipic dihydrazide, ADH	≥99%, HPLC	Used in keto-hydrazide self-crosslinking emulsions, room-temperature crosslinking, water resistance, and block-resistance research
Self-crosslinking functional monomer	2873-97-4	D110099	Diacetone acrylamide, DAAM	≥99%	Used in self-crosslinking waterborne acrylic emulsions, post-film-formation crosslinking, water resistance, and stain-resistance research
Alicyclic diisocyanate	4098-71-9	I109582	Isophorone diisocyanate, mixture of isomers, IPDI	≥99%	Used for waterborne polyurethane synthesis, yellowing-resistant structures, crosslinker/prepolymer design, and high-performance coating-film research; actual application requires attention to safe handling of isocyanates, moisture sensitivity, and formulation stability
Alicyclic amine curing agent	2855-13-2	A104545	Isophorone diamine, cis/trans mixture, IPDA	≥99%	Used for waterborne epoxy curing, polyurethane chain extension, chemical resistance, and anti-corrosion system research
Benzophenone UV absorber	1843-05-6	H109120	2-Hydroxy-4-n-octoxybenzophenone, HOBP	≥99%	Used for weatherability and UV-aging research in waterborne wood coatings, exterior wall coatings, and industrial coatings
Benzotriazole UV absorber	25973-55-1	D155329	2-(3,5-Di-tert-amyl-2-hydroxyphenyl)benzotriazole	≥98%	Used for weather-resistant coatings, UV shielding, photo-aging testing, and exterior coating research
Hindered amine light stabilizer	41556-26-7	B134649	Bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate	≥95%, GC; sum of monoester and diester	Used in light-stabilization systems, weather-resistant coatings, transparent coatings, and polymer-aging research

Note: The above are representative Aladdin products. More product specifications can be searched on the Aladdin website by “product name / CAS / catalog number.”

References

[1] Wicks Z. W., Jones F. N., Pappas S. P., Wicks D. A. Organic Coatings: Science and Technology. 3rd ed. Hoboken: John Wiley & Sons, 2007.

[2] Tracton A. A. Coatings Technology Handbook. 3rd ed. Boca Raton: CRC Press, 2006.

[3] Bieleman J. Additives for Coatings. Weinheim: Wiley-VCH, 2000.

[4] American Coatings Association. Technology Roadmap #3: Durability and Water Resistance of Waterborne Coatings. American Coatings Association, 2024.

[5] Pieters K., Mekonnen T. H. Progress in waterborne polymer dispersions for coating applications: commercialized systems and new trends. RSC Sustainability, 2024, 2, 3573–3614. DOI: 10.1039/D4SU00267A.

[6] Koleske J. V. Paint and Coating Testing Manual: Fourteenth Edition of the Gardner-Sward Handbook. West Conshohocken: ASTM International, 1995.

[7] Hare C. H. Protective Coatings: Fundamentals of Chemistry and Composition. Pittsburgh: Technology Publishing Company, 1994.

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