Guide to Common Waterborne Resin Types and Application-Based Selection: How to Choose Acrylics, PUD, Waterborne Epoxy, Waterborne Alkyd, VAE, and Related Chemicals

1 Core Questions in Waterborne Resin Selection

1.1 Key Selection Criteria

There is no “best” waterborne resin in an absolute sense. The key question is whether it is suitable for the target application. Different resins have different strengths in water resistance, weatherability, hardness, flexibility, adhesion, chemical resistance, application properties, cost, and regulatory adaptability. When selecting a waterborne resin, five questions should be answered first:

Selection Question	Key Considerations
What substrate will it be applied to?	Cement, wood, metal, plastic, leather, fabric, paper, etc.
What environment will it be used in?	Indoor, outdoor, humid conditions, UV exposure, chemicals, abrasion, corrosive environments
What is the most important performance requirement?	Weatherability, water resistance, hardness, flexibility, adhesion, corrosion protection, abrasion resistance, low odor, etc.
What is the application method?	Brushing, roller coating, spraying, dip coating, flow coating, knife coating, industrial line coating, etc.
What are the cost and regulatory requirements?	Requirements related to VOCs (Volatile Organic Compounds), odor, APEO (Alkylphenol Ethoxylates), NMP (N-Methyl-2-pyrrolidone), etc.

1.2 Basic Logic for Selecting Waterborne Resins

Waterborne resin selection can be evaluated in the following order:

Step	Evaluation Focus	Purpose
Step 1	Define the substrate	Determine requirements for adhesion, wetting, penetration, and interfacial bonding
Step 2	Define the service environment	Determine requirements for water resistance, weatherability, corrosion resistance, chemical resistance, and abrasion resistance
Step 3	Define performance priorities	Balance hardness, flexibility, blocking resistance, low-temperature film formation, stain resistance, etc.
Step 4	Define the application method	Determine viscosity, open time, drying speed, and application suitability
Step 5	Define cost and compliance requirements	Determine resin grade, additive restrictions, and regulatory adaptability

Performance priorities differ depending on the application. For example, interior wall coatings place greater emphasis on low odor, application properties, and scrub resistance; exterior wall coatings emphasize weatherability, water resistance, and dirt pick-up resistance; metal anti-corrosion coatings emphasize adhesion, flash-rust resistance, and salt-spray resistance; wood coatings emphasize transparency, hand feel, blocking resistance, and water resistance.

2 Performance Map of Common Waterborne Resins

Common waterborne resins include acrylic emulsions, vinyl acetate-ethylene copolymer emulsion VAE (Vinyl Acetate-Ethylene Copolymer Emulsion), polyurethane dispersion PUD (Polyurethane Dispersion), waterborne epoxy, waterborne alkyd, waterborne polyester, hydroxy acrylic, and hybrid resins.

Resin Type	Core Advantages	Main Limitations	Typical Application Areas
Styrene-acrylic emulsion	Cost-effective; good hardness and adaptability to pigmented/filler systems	Weatherability and yellowing resistance are usually weaker than pure acrylic systems	Interior walls, general architectural coatings, primers
Pure acrylic emulsion	Good weatherability, color retention, and water resistance	Higher cost than styrene-acrylic; low-temperature film formation needs to be balanced	Exterior walls, high-performance architectural coatings, some industrial coatings
Silicone-acrylic emulsion	Good water resistance, weatherability, and dirt pick-up resistance	Higher cost; formulation suitability needs verification	High-performance exterior walls, elastomeric coatings, stain-resistant coatings
VAE emulsion	Good film formation, flexibility, application properties, and cost performance	Limited water resistance, alkali resistance, and weatherability	Interior walls, adhesives, paper, and construction auxiliaries
PUD	Good flexibility, abrasion resistance, adhesion, and hand feel	Higher cost; sensitive to formulation and drying conditions	Wood coatings, leather, textiles, plastics, industrial coatings
Waterborne epoxy	Good adhesion, corrosion protection, and chemical resistance	Limited outdoor weatherability; pot life must be controlled in two-component systems	Anti-corrosion primers, floor coatings, concrete protection
Waterborne alkyd	Good wetting, leveling, gloss, and fullness	Drying speed, yellowing resistance, and water resistance need optimization	Metal decorative coatings, wood coatings, general industrial coatings
Waterborne polyester / hydroxy acrylic	Good decorative appearance, hardness, gloss, and crosslinkability	Often requires crosslinking systems and industrial application conditions	Industrial topcoats, baking finishes, two-component coatings
Hybrid resin	Helps balance properties that are difficult to achieve with a single resin	Complex structure; stability and cost need evaluation	High-performance architectural, wood, industrial, and anti-corrosion coatings

This performance map should only be used as an initial reference. Actual selection also requires comprehensive evaluation of resin solids content, pH, particle size, glass transition temperature Tg, minimum film-forming temperature MFFT, functional groups, crosslinking mechanism, and formulation suitability.

3 Analysis of Common Waterborne Resin Types

3.1 Acrylic Resins

Acrylic resins are among the most widely used resin types in waterborne coatings. Depending on monomer composition and modification method, they can be classified as styrene-acrylic, pure acrylic, silicone-acrylic, elastomeric acrylic, hydroxy acrylic, self-crosslinking acrylic, and other types. Acrylic resins are highly designable in structure. Their hardness, flexibility, water resistance, weatherability, and film-forming properties can be adjusted through soft and hard monomers, functional monomers, particle size, core-shell structure, and crosslinking design.

3.1.1 Styrene-Acrylic Emulsion

Styrene-acrylic emulsions are usually copolymers of styrene and acrylic ester monomers. They are commonly used in architectural coatings and general-purpose waterborne coatings. If the application environment involves long-term exposure to strong UV radiation, rainwater, and temperature-humidity fluctuations, resin systems with better weatherability should generally be considered.

Item	Selection Consideration
Main advantages	Cost-effective; good hardness; suitable for pigmented and filler systems; strong applicability in architectural coatings
Main limitations	Weatherability, yellowing resistance, and long-term color retention are usually weaker than pure acrylic systems
Suitable applications	Interior wall coatings, general primers, economical architectural coatings
Selection focus	Scrub resistance, adaptability to hiding systems, calcium ion stability, freeze-thaw stability, low-odor requirements

3.1.2 Pure Acrylic Emulsion

Pure acrylic emulsions are mainly composed of acrylate and methacrylate monomers and do not contain styrene structures. They are usually superior to styrene-acrylic systems in weatherability, color retention, water resistance, and alkali resistance. Pure acrylic emulsions are suitable for exterior walls and applications with higher weatherability requirements. If both low-temperature film formation and blocking resistance are required, attention should be paid to Tg, MFFT, particle size, and whether a core-shell structure or self-crosslinking design is used.

Item	Selection Consideration
Main advantages	Good weatherability, water resistance, and color retention
Main limitations	Higher cost; hardness and low-temperature film formation need to be balanced
Suitable applications	Exterior wall coatings, high-performance architectural coatings, some industrial coatings
Selection focus	Weatherability, water resistance, dirt pick-up resistance, low-temperature application, long-term color retention

3.1.3 Silicone-Acrylic Emulsion

Silicone-acrylic emulsions introduce organosilicon structures or silicone-modified components into acrylic resins to improve water resistance, weatherability, dirt pick-up resistance, and surface hydrophobicity.

Item	Selection Consideration
Main advantages	Good water resistance, weatherability, dirt pick-up resistance, and hydrophobicity
Main limitations	Higher cost; system compatibility and application stability need verification
Suitable applications	High-performance exterior walls, elastomeric coatings, stain-resistant coatings
Selection focus	Dirt pick-up resistance, rain-streak resistance, weatherability, breathability, formulation compatibility

3.1.4 Hydroxy Acrylic and Self-Crosslinking Acrylic

Hydroxy acrylic resins contain hydroxyl groups and can react with crosslinkers such as isocyanates and amino resins to improve coating film hardness, chemical resistance, and solvent resistance. Self-crosslinking acrylic resins form a certain crosslinked structure during drying through the resin’s own functional groups. These resins are suitable for systems requiring higher water resistance, blocking resistance, stain resistance, and chemical resistance, but attention should be paid to crosslinking reaction speed, storage stability, pot life, and flexibility.

Type	Main Characteristics	Suitable Directions
Hydroxy acrylic	Crosslinkable; suitable for improving hardness, chemical resistance, and solvent resistance	Industrial coatings, wood coatings, two-component systems
Self-crosslinking acrylic	Relatively convenient to use; can improve water resistance, blocking resistance, and stain resistance	Architectural, wood, and general industrial coatings

3.2 VAE Emulsion

VAE emulsion is a waterborne emulsion formed by the copolymerization of vinyl acetate and ethylene. Ethylene units can reduce the polymer’s glass transition temperature and improve flexibility and film-forming properties.

Item	Selection Consideration
Main advantages	Good film formation, good flexibility, good application properties, and good cost performance
Main limitations	Water resistance, alkali resistance, and weatherability are usually limited
Suitable applications	Interior wall coatings, adhesives, putty auxiliaries, paper and nonwoven-related systems
Selection focus	Low odor, low-temperature film formation, scrub resistance, water and alkali resistance requirements, cost

VAE emulsions are suitable for interior architectural coatings, adhesives, and similar applications. For long-term outdoor use, highly alkaline substrates, or applications requiring high water resistance, their weatherability, water resistance, and alkali resistance should be carefully evaluated. VAE’s advantages lie in good film formation and flexibility. However, if high water resistance, high weatherability, or high chemical resistance is required, other resin systems should usually be selected, or resin blending and modification should be considered.

3.3 Polyurethane Dispersion PUD

PUD is a system in which polyurethane resin is dispersed in water in the form of fine particles. Depending on the soft segment, hard segment, ionic groups, crosslinking structure, and modification method, PUD can exhibit a broad range of properties.

Item	Selection Consideration
Main advantages	Good flexibility, abrasion resistance, adhesion, elasticity, and hand feel
Main limitations	Higher cost; sensitive to drying conditions, additives, and formulation compatibility
Suitable applications	Wood coatings, leather finishing, textile coatings, plastic coatings, industrial coatings
Selection focus	Soft/hard segment structure, hydrolysis resistance, abrasion resistance, adhesion, hand feel, chemical resistance

The performance of PUD is closely related to its structure.

PUD Structural Direction	Performance Tendency
Polyester-based PUD	Good strength and abrasion resistance; hydrolysis resistance needs evaluation
Polyether-based PUD	Good flexibility, low-temperature performance, and hydrolysis resistance
Aliphatic PUD	Good yellowing resistance and appearance retention
Aromatic PUD	Lower cost, but weaker yellowing resistance
Crosslinked PUD	Can improve water resistance, solvent resistance, and mechanical properties
PUD-acrylic hybrid	Helps balance cost, hardness, flexibility, and abrasion resistance

3.4 Waterborne Epoxy Resin

Waterborne epoxy systems usually consist of waterborne epoxy resin or epoxy dispersion combined with waterborne amine curing agents. Their advantages lie in adhesion, corrosion protection, chemical resistance, and bonding capability to substrates such as concrete and metal.

Item	Selection Consideration
Main advantages	Strong adhesion; good corrosion protection and chemical resistance
Main limitations	Limited outdoor weatherability; two-component application requires control of pot life and curing conditions
Suitable applications	Anti-corrosion primers, floor coatings, concrete protection, industrial primers
Selection focus	Epoxy equivalent weight, curing agent type, pot life, low-temperature curing, salt-spray resistance, water resistance

Waterborne epoxy is suitable for primers or floor systems requiring high adhesion, corrosion protection, and chemical resistance. Waterborne epoxy is usually not suitable as a high-weatherability topcoat for long-term direct outdoor exposure, because epoxy structures tend to chalk and lose gloss under ultraviolet light. When selecting waterborne epoxy, special attention should be paid to the matching between the resin and the curing agent. The type, activity, emulsifying capability, and compatibility of the curing agent significantly affect pot life, drying speed, film compactness, water resistance, and corrosion protection performance.

3.5 Waterborne Alkyd Resin

Waterborne alkyd resins are produced by waterborne modification of traditional alkyd resins so that they can be diluted or dispersed with water. Alkyd resins contain fatty acid structures and often form films gradually through oxidative drying in air.

Item	Selection Consideration
Main advantages	Good wetting, leveling, gloss, fullness, and application feel
Main limitations	Drying speed, yellowing resistance, water resistance, and early hardness need optimization
Suitable applications	Metal decorative coatings, wood coatings, general industrial coatings
Selection focus	Oil length, fatty acid type, drying speed, yellowing, water resistance, VOC

Waterborne alkyds are suitable for applications requiring good application feel, leveling, and decorative appearance. Compared with acrylic emulsions, waterborne alkyds usually have advantages in wetting and fullness. However, drying speed, yellowing resistance, and water resistance need to be carefully controlled. For white or light-colored systems, yellowing resistance should be given special attention. For metal substrates, early water resistance, flash-rust resistance, and adhesion should be considered.

3.6 Waterborne Polyester and Waterborne Hydroxy Acrylic

Waterborne polyester and waterborne hydroxy acrylic are commonly used in crosslinkable industrial coating systems. They can be combined with amino resins, blocked isocyanates, or water-dispersible isocyanates to improve hardness, gloss, chemical resistance, and decorative appearance.

Resin Type	Main Characteristics	Typical Applications
Waterborne polyester	Good gloss, fullness, flexibility, and decorative appearance	Industrial baking finishes, metal coating, coil coating
Waterborne hydroxy acrylic	Good weatherability, hardness, and crosslinkability	2K waterborne polyurethane, industrial topcoats, wood coatings

2K (Two-Component) waterborne polyurethane systems are usually based on waterborne hydroxy resins combined with water-dispersible polyisocyanates. They can provide high hardness, chemical resistance, abrasion resistance, and appearance quality. However, these systems have relatively high requirements for mixing ratio, pot life, application environment, and crosslinking reaction conditions.

3.7 Hybrid Resins

Hybrid resins combine the advantages of different resins through structural hybridization or particle hybridization to improve properties that are difficult to balance with a single resin. The core value of hybrid resins is to balance application pain points. For example, polyurethane can be used to improve the flexibility and abrasion resistance of acrylics; acrylics can be used to improve the drying and weatherability of alkyds; and epoxy structures can be used to improve adhesion and corrosion protection.

Hybrid Type	Main Purpose	Typical Applications
PUD-acrylic hybrid	Balance flexibility, abrasion resistance, hardness, and cost	Wood, leather, industrial coatings
Epoxy-acrylic hybrid	Improve adhesion, corrosion protection, and application suitability	Metal primers, anti-corrosion coatings
Alkyd-acrylic hybrid	Balance leveling, drying, weatherability, and cost	Metal decorative coatings, industrial coatings
Silicone-acrylic hybrid	Improve water resistance, weatherability, and dirt pick-up resistance	High-performance exterior wall coatings

4 Selecting Waterborne Resins by Application Scenario

4.1 Interior Architectural Coatings

Interior wall coatings usually focus on low odor, application properties, hiding power, scrub resistance, storage stability, and cost.

Selection Focus	Recommended Resin Direction
Economical interior wall coatings	Styrene-acrylic emulsion, VAE emulsion
Mid- to high-end interior wall coatings	Pure acrylic emulsion, modified styrene-acrylic emulsion
Low odor and low VOC	Low-odor acrylic emulsion, low-VOC VAE
High scrub resistance	Pure acrylic, self-crosslinking acrylic, scrub-resistant styrene-acrylic

4.2 Exterior Architectural Coatings

Exterior wall coatings are exposed to ultraviolet radiation, rainwater, temperature-humidity fluctuations, and polluted environments for long periods. Therefore, greater emphasis is placed on weatherability, water resistance, color retention, alkali resistance, and dirt pick-up resistance.

Selection Focus	Recommended Resin Direction
General exterior wall coatings	Pure acrylic emulsion, modified acrylic emulsion
High-weatherability exterior wall coatings	Pure acrylic emulsion, silicone-acrylic emulsion
High dirt pick-up resistance	Silicone-acrylic emulsion, fluoro-silicone modified acrylic
Elastomeric exterior wall coatings	Elastomeric acrylic emulsion, silicone-acrylic elastomeric emulsion

4.3 Wood Coatings

Waterborne wood coatings focus on transparency, wetting, hand feel, hardness, blocking resistance, water resistance, alcohol resistance, stain resistance, and sandability.

Selection Focus	Recommended Resin Direction
Flexibility and hand feel	PUD, PUD-acrylic hybrid
Transparency and appearance	Waterborne acrylic, PUD, hydroxy acrylic
High water resistance and stain resistance	Self-crosslinking acrylic, 2K waterborne polyurethane
High hardness and chemical resistance	Waterborne hydroxy acrylic + water-dispersible isocyanate

Resin selection for wood coatings requires balancing hardness, flexibility, transparency, and blocking resistance. PUD is suitable for improving flexibility, hand feel, and abrasion resistance; acrylics are suitable for improving transparency, hardness, and cost balance; 2K waterborne polyurethane is suitable for applications requiring high resistance properties.

4.4 Metal Anti-Corrosion Coatings

Metal anti-corrosion coatings focus on adhesion, flash-rust resistance, water resistance, salt-spray resistance, chemical resistance, and film compactness. In metal systems, resin adhesion and corrosion protection are very important. Waterborne epoxy is suitable for anti-corrosion primers and floor primers; waterborne alkyd is suitable for metal decorative coatings and general industrial paints; waterborne acrylic is suitable for systems requiring fast drying and higher weatherability.

Selection Focus	Recommended Resin Direction
Anti-corrosion primer	Waterborne epoxy, waterborne epoxy ester, epoxy-acrylic hybrid
General metal paint	Waterborne acrylic, waterborne alkyd, waterborne epoxy-modified systems
High salt-spray resistance	Waterborne epoxy + suitable curing agent system
Decorative metal coatings	Waterborne alkyd, waterborne acrylic, waterborne polyester

4.5 Floor Coatings

Floor coatings require abrasion resistance, hardness, adhesion, water resistance, chemical resistance, compressive strength, and suitability for thick-film application. Waterborne epoxy is an important resin direction in waterborne floor coatings and is suitable for primers, intermediate coats, and some topcoats. If higher requirements are placed on abrasion resistance, stain resistance, chemical resistance, and decorative appearance, waterborne polyurethane or waterborne polyurethane topcoat systems may be considered.

Selection Focus	Recommended Resin Direction
Adhesion to cementitious substrates	Waterborne epoxy
Abrasion resistance and chemical resistance	Waterborne epoxy, 2K waterborne polyurethane
Topcoat stain resistance and decorative appearance	Waterborne polyurethane, waterborne hydroxy acrylic systems
Low-odor application	Low-VOC waterborne epoxy, waterborne polyurethane systems

4.6 Leather, Textile, and Flexible Substrate Coatings

Flexible substrates require resins with flexibility, flex resistance, hand feel, adhesion, washing resistance, and abrasion resistance. In such applications, the resin should not be overly hard. Excessive hardness may lead to poorer hand feel, reduced flex resistance, and a higher risk of cracking. PUD is an important resin type in flexible substrate coatings.

Selection Focus	Recommended Resin Direction
Flexibility and flex resistance	PUD, flexible acrylic emulsion
Hand feel and elasticity	PUD, PUD-acrylic hybrid
Washing resistance and abrasion resistance	Crosslinked PUD, self-crosslinking acrylic
Low-temperature flexibility	Polyether-based PUD, low-Tg acrylic emulsion

4.7 Packaging Coatings and Waterborne Inks

Packaging coatings and waterborne inks focus on adhesion, fast drying, rub resistance, water resistance, resolubility control, and printability. If food contact or food packaging scenarios are involved, regulatory compliance, migration risks, and suitability for the final structure must also be confirmed separately.

Selection Focus	Recommended Resin Direction
Waterborne inks	Waterborne acrylic resin, acrylic emulsion
Flexibility and adhesion	PUD, PUD-acrylic hybrid
Rub resistance and water resistance	Self-crosslinking acrylic, crosslinked PUD
Paper and film suitability	Acrylic, PUD, specialized waterborne dispersion

4.8 Industrial Topcoats and High-Performance Coating Systems

Industrial topcoats usually focus on appearance, gloss, hardness, weatherability, chemical resistance, abrasion resistance, and application stability. Resin selection should not be based only on a single property. It should also be evaluated together with application method, drying conditions, film thickness, and the subsequent service environment.

Selection Focus	Recommended Resin Direction
High gloss and decorative appearance	Waterborne polyester, waterborne hydroxy acrylic
High weatherability	Pure acrylic, hydroxy acrylic, aliphatic PUD
High chemical resistance	2K waterborne polyurethane; waterborne epoxy systems are suitable for indoor use, primers, intermediate coats, floors, or anti-corrosion systems
Flexibility and abrasion resistance	PUD, PUD-acrylic hybrid

5 Quick Reference for Resin Selection in Common Applications

Application Direction	Priority Properties	Common Resin Directions
Interior wall coatings	Low odor, application properties, scrub resistance, cost	Styrene-acrylic, VAE, pure acrylic
Exterior wall coatings	Weatherability, water resistance, color retention, dirt pick-up resistance	Pure acrylic, silicone-acrylic, elastomeric acrylic
Wood coatings	Transparency, hand feel, blocking resistance, water resistance	PUD, acrylic, PUD-acrylic, 2K PU
Metal anti-corrosion	Adhesion, flash-rust resistance, salt-spray resistance, water resistance	Waterborne epoxy, epoxy-acrylic, waterborne alkyd
Floor coatings	Abrasion resistance, hardness, chemical resistance, adhesion	Waterborne epoxy, 2K waterborne polyurethane
Leather/textiles	Flexibility, flex resistance, hand feel, abrasion resistance	PUD, flexible acrylic, PUD-acrylic
Packaging/inks	Fast drying, adhesion, rub resistance, low odor	Waterborne acrylic, PUD, self-crosslinking acrylic
Industrial topcoats	Gloss, hardness, weatherability, chemical resistance	Hydroxy acrylic, waterborne polyester, PUD, 2K PU

6 Common Mistakes in Resin Selection

6.1 Mistake 1: Judging Performance Only by Resin Name

The same term “acrylic emulsion” may refer to different types such as styrene-acrylic, pure acrylic, silicone-acrylic, self-crosslinking acrylic, and elastomeric acrylic. Their weatherability, film formation, hardness, flexibility, and water resistance may differ greatly. Similarly, the same term “PUD” may refer to systems with completely different performance depending on soft segment, hard segment, ionic groups, crosslinking structure, and modification method. Resin names only provide an initial direction and cannot replace specific technical parameters and application testing.

6.2 Mistake 2: Pursuing Only High Hardness or High Resistance

High hardness, high crosslinking density, and high chemical resistance are not always the best choices. For flexible substrates, wood coatings, or elastomeric coatings, excessive hardness may cause cracking, poor hand feel, or insufficient flex resistance. Selection should be centered on application requirements rather than simply maximizing a single performance indicator.

6.3 Mistake 3: Assuming High-Performance Resins Are Suitable for All Applications

PUD, waterborne epoxy, 2K waterborne polyurethane, and other systems can provide high performance, but they may also bring issues related to cost, application complexity, pot life, drying conditions, and formulation compatibility. High-performance resins should be prioritized for application scenarios where performance requirements are clear, cost is acceptable, and application conditions are controllable.

6.4 Mistake 4: Ignoring the Substrate and Environment

The same resin may perform differently on different substrates. Metal, wood, cement, plastic, leather, and paper have very different surface properties and different requirements for wetting, adhesion, penetration, and durability. The performance of the same resin may also vary between indoor and outdoor environments, dry and humid conditions, room temperature and high temperature, ordinary environments and corrosive environments. Resin selection must be judged in combination with the substrate and service environment.

7 Summary

The core of waterborne resin selection is determining which resin is more suitable for the target application. The key points of this article can be summarized as follows:

① Acrylic resins have a wide range of applications.

Styrene-acrylic is suitable for cost-effective and general architectural applications; pure acrylic is suitable for weatherability and exterior wall applications; silicone-acrylic is suitable for higher requirements in water resistance, weatherability, and dirt pick-up resistance.

② VAE emulsion is suitable for interior walls, adhesives, and similar applications.

It has good film-forming properties, flexibility, and cost performance, but its water resistance, alkali resistance, and weatherability need to be evaluated according to the specific application.

③ PUD is suitable for applications requiring high flexibility, abrasion resistance, hand feel, and adhesion.

PUD has clear application value in wood coatings, leather, textiles, plastics, and some industrial coatings, but cost and formulation suitability should be considered.

④ Waterborne epoxy is suitable for anti-corrosion, flooring, and high-adhesion primers.

Its advantages lie in adhesion, corrosion protection, and chemical resistance, but outdoor weatherability and two-component application management require attention.

⑤ Waterborne alkyd, waterborne polyester, hydroxy acrylic, and hybrid resins are suitable for targeted performance upgrades.

Alkyd focuses on wetting, leveling, and decorative appearance; polyester and hydroxy acrylic are suitable for industrial crosslinking systems; hybrid resins are used to solve performance imbalances that are difficult to address with a single resin.

Reasonable waterborne resin selection should jointly consider substrate, environment, performance priorities, application method, cost, and regulatory requirements.

8. Classification and Application Tables of Representative Chemicals Related to Common Waterborne Resin Types and Application-Based Selection

Note: The following products are representative monomers, raw materials, intermediates, curing agents, or additives that may be involved in research on waterborne resins, coatings, and adhesives. They are not equivalent to finished waterborne resins or industrial formulation recommendations. Specific applications should be confirmed based on SDS, COA, regulatory restrictions, reaction conditions, formulation compatibility, and end-use performance testing.

Table 1. Products Related to Acrylics, Styrene-Acrylics, VAE, and Functional Monomers

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Hydroxy acrylic monomer	868-77-9	H140643	2-Hydroxyethyl methacrylate (HEMA)	Anhydrous grade, ≥99%, contains 200 ppm MEHQ stabilizer, water ≤0.1%	Used in research on hydroxy acrylic resins, crosslinkable waterborne coatings, wood coatings, and industrial topcoats
Carboxyl-functional monomer	79-10-7	A397753	Acrylic acid	Anhydrous grade, ≥99%, contains 200 ppm MEHQ stabilizer	Used for introducing carboxyl groups into waterborne acrylic resins, emulsion stabilization, adhesion adjustment, and research on alkali-soluble resins
Carboxyl-functional monomer	79-41-4	M434201	Methacrylic acid	Suitable for synthesis, stabilized with hydroquinone monomethyl ether	Used in research on acid value adjustment, hardness adjustment, dispersion stability, and water resistance of waterborne acrylic resins
Soft monomer	140-88-5	E112944	Ethyl acrylate	Chemically pure (CP), ≥98%, contains 20 ppm MEHQ stabilizer	Used in research on soft-segment design, film formation, flexibility, and low-temperature application properties of waterborne acrylic emulsions
Soft monomer	141-32-2	B100036	Butyl acrylate (BA)	Chemically pure (CP), ≥98%, contains 50 ppm MEHQ stabilizer	Used for adjusting flexibility, low-temperature film formation, crack resistance, and glass transition temperature in waterborne acrylic emulsions
Vinyl ester monomer	108-05-4	V104471	Vinyl acetate	Chemically pure (CP), ≥98%	Used in research on polyvinyl acetate emulsions, ethylene-vinyl acetate copolymer systems, and construction adhesives
Hydrophobic vinyl ester monomer	51000-52-3	V170678	Vinyl neodecanoate, mixture of isomers	Contains MEHQ inhibitor	Used in hydrophobic modification, water resistance improvement, and exterior wall coating research for waterborne acrylic and vinyl acetate copolymer systems
Ethylene-vinyl acetate copolymer	24937-78-8	P432376	Poly(ethylene-co-vinyl acetate) (PEVA)	Vinyl acetate 12 wt.%, melt index 8 g/10 min (190°C/2.16 kg)	Used for performance comparison of EVA/PEVA copolymer materials, flexibility, film-forming properties, and adhesive application evaluation
Styrene-acrylic hard monomer	100-42-5	S110375	Styrene	CP, contains 10–15 ppm 4-tert-butylcatechol stabilizer	Used in research on styrene-acrylic emulsions, architectural coating resins, hardness adjustment, and cost balancing
Hard monomer	80-62-6	M109623	Methyl methacrylate (MMA)	AR, ≥99%, contains 30 ppm DMBP stabilizer	Used in research on hardness, transparency, weatherability, and exterior wall coating resins for waterborne acrylic resins
High glass transition temperature monomer	7534-94-3	I102358	Isobornyl methacrylate	50–150 ppm MEHQ stabilizer	Used in research on acrylic resin hardness, heat resistance, hydrophobicity, blocking resistance, and industrial coatings
Low glass transition temperature monomer	103-11-7	E108592	2-Ethylhexyl acrylate (2-EHA)	≥99% (GC), contains 10–1100 ppm MEHQ as stabilizer	Used in research on elastomeric acrylic emulsions, flexible coating films, low-temperature film formation, and pressure-sensitive adhesive systems
Epoxy-functional acrylic monomer	106-91-2	G106686	Glycidyl methacrylate	≥97%, contains 100 ppm MEHQ stabilizer	Used in research on epoxy-functionalized acrylic resins, adhesion enhancement, crosslinking reactions, and metal coatings
Hydroxy acrylic monomer	27813-02-1	H109880	Hydroxypropyl methacrylate (HPMA)	≥97%, contains 0.02% 4-methoxyphenol stabilizer	Used in research on hydroxy acrylic resins, two-component waterborne polyurethane, industrial topcoats, and wood coatings
Hydroxy acrylic monomer	818-61-1	H104535	2-Hydroxyethyl acrylate	≥96%, contains 200–600 ppm MEHQ as inhibitor	Used in research on hydroxylated waterborne acrylic emulsions, crosslinkable clear coats, adhesion, and chemical resistance
Hydroxy acrylic monomer	25584-83-2	H156905	Hydroxypropyl acrylate, mixture of 2-hydroxypropyl acrylate and 2-hydroxy-1-methylethyl acrylate	≥90% (GC), contains MEHQ stabilizer	Used in research on hydroxy waterborne acrylic resins, flexibility adjustment, crosslinked coating films, and industrial coatings

Table 2. Products Related to Waterborne Polyurethane Dispersions and Polyurethane Structural Raw Materials

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Polyurethane chain extender	110-63-4	B1508458	1,4-Butanediol (BDO)	Anhydrous grade, ≥99%	Used in research on waterborne polyurethane chain extension, hard-segment structure adjustment, abrasion resistance, and mechanical properties
Process solvent	872-50-4	M119668	N-Methyl-2-pyrrolidone (NMP)	Anhydrous grade, ≥99.5%	Used in research on traditional waterborne polyurethane prepolymer dissolution, synthesis processes, and dispersion processes; in practical applications, attention should be paid to regulatory restrictions, occupational exposure risks, and NMP-free or low-residue alternatives
Polyester polyol	36890-68-3	P478032	Polycaprolactone diol	Average Mn 10000	Used in research on high-molecular-weight polyurethane soft-segment design, flexibility, abrasion resistance, and elastomeric coatings; when used in PUD synthesis, viscosity, dissolution/dispersion, and process compatibility should be considered
Aliphatic diisocyanate	822-06-0	H106723	Hexamethylene diisocyanate (HDI)	Moligand™, ≥99%	Used in research on polyurethane resin synthesis, yellowing-resistant structures, crosslinking design, and industrial coatings
Cycloaliphatic diisocyanate	4098-71-9	I109582	Isophorone diisocyanate, mixture of isomers (IPDI)	≥99%	Used in research on waterborne polyurethane dispersions, yellowing-resistant coating films, wood coatings, and industrial coatings
Internal emulsifying monomer	10097-02-6	B115196	2,2-Bis(hydroxymethyl)butyric acid (DMBA)	≥98%	Used in research on internal emulsification of waterborne polyurethane, particle size control, dispersion stability, and low-odor systems
Internal emulsifying monomer	4767-03-7	B104539	2,2-Bis(hydroxymethyl)propionic acid (DMPA)	≥98%	Used in research on carboxyl-based waterborne modification of polyurethane, ionic stabilization, dispersion preparation, and neutralization to form salts
Amine chain-extension and curing intermediate	36692-49-6	M122710	Methyl 3,4-diaminobenzoate	≥98%	Used in research on aromatic amine-containing structural materials, functional resins, and curing reactions; when used for polyurethane chain extension, reaction activity, solubility, and process conditions need to be verified
Cycloaliphatic diisocyanate	5124-30-1	D155475	Dicyclohexylmethane 4,4'-diisocyanate, mixture of isomers (HMDI)	≥90% (GC)	Used in research on waterborne polyurethane dispersions, yellowing-resistant structures, flexible coating films, and high-solids resins

Table 3. Products Related to Waterborne Epoxy Resins, Curing Agents, and Reactive Diluents

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Phenolic epoxy resin	28064-14-4	P477947	Poly[(phenyl glycidyl ether)-co-formaldehyde]	Average Mn ~345	Used in research on epoxy anti-corrosion coatings, chemically resistant coating films, crosslink density adjustment, and high-performance resins
Amine epoxy curing agent	112-24-3	T103762	Triethylenetetramine (TETA)	Chemically pure (CP), ≥68%	Used in research on waterborne epoxy curing, anti-corrosion primers, floor coatings, and crosslinking reactions
Epoxy reactive diluent	68609-97-2	D133554	C12–14 alkyl glycidyl ether	Industrial grade	Used in research on epoxy resin viscosity reduction, flexibility adjustment, curing reactions, and waterborne epoxy systems
Epoxy resin raw material	106-89-8	E401255	Epichlorohydrin	Industrial grade	Used in research on epoxy resin synthesis, glycidyl ether preparation, and epoxy-functional materials
Epoxy resin raw material	80-05-7	B108651	Bisphenol A	Moligand™, chemically pure (CP)	Used in research on bisphenol A epoxy resins, industrial coating resins, flooring, and anti-corrosion materials
Bisphenol A epoxy resin	1675-54-3	B131786	Bisphenol A diglycidyl ether (BADGE)	Moligand™, ≥85%	Used in research on waterborne epoxy systems, metal anti-corrosion, concrete protection, and chemically resistant coating films
Amine epoxy curing agent	111-40-0	D100059	Diethylenetriamine	≥99%	Used in research on epoxy curing, crosslink density adjustment, water resistance, chemical resistance, and adhesion
Cycloaliphatic amine curing agent	2855-13-2	A104545	Isophoronediamine, mixture of cis/trans isomers (IPDA)	≥99%	Used in research on waterborne epoxy curing, anti-corrosion coatings, floor coatings, and chemical resistance
Monofunctional epoxy modifier	26761-45-5	G769075	Glycidyl neodecanoate	≥99%	Used in modification of epoxy resins and acrylic resins, viscosity reduction, hydrophobicity, and flexibility adjustment
Epoxy reactive diluent	2426-08-6	B152235	Butyl glycidyl ether	≥98% (GC)	Used in research on epoxy system viscosity reduction, curing reactions, flexibility adjustment, and coating application properties

Table 4. Products Related to Waterborne Alkyds, Waterborne Polyesters, and Drier Systems

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Anhydride-type polyester raw material	85-44-9	P116466	Phthalic anhydride	Premium grade reagent, ≥99%	Used in synthesis of alkyd resins, polyester resins, decorative coatings, and metal coating resins
Polyol	56-81-5	G755728	Glycerol	Anhydrous grade, UltraBio™, molecular biology grade, ≥99.5% (GC)	Used in research on polyol components of alkyd resins, branched structures, oil-modified resins, and coating film fullness
Dibasic acid	124-04-9	A431648	Adipic acid	Suitable for synthesis	Used in research on flexibility adjustment of polyester resins and alkyd resins, industrial coatings, and elastomeric coating films
Oil raw material	8001-22-7	S110244	Soybean oil	Reagent grade	Used in research on oil modification of alkyd resins, oxidative drying, flexibility, and metal decorative coatings
Alkyd drier	22464-99-9	Z282613	Zirconium 2-ethylhexanoate	In mineral spirits (~6% Zr)	Used in research on drying acceleration, hardness development, and drying performance of waterborne alkyds and oxidative-drying coatings
Unsaturated anhydride	108-31-6	M116389	Maleic anhydride	AR, ≥99% (GC)	Used in research on unsaturated polyester, alkyd resin modification, reaction activity adjustment, and coating resins
Aromatic dibasic acid	121-91-5	I104311	Isophthalic acid (IPA)	AR, ≥99%	Used in research on polyester resins, alkyd resins, water resistance, hardness, and industrial coating resins
Polyol	115-77-5	P103696	Pentaerythritol, regulated explosive precursor	AR, ≥98%	Used in research on branched structures, hardness, drying speed, and coating film fullness of alkyd resins
Alkyd drier	136-52-7	C282475	Cobalt(II) 2-ethylhexanoate solution	65 wt.% in mineral spirits	Used in research on oxidative drying of alkyd resins, surface-drying performance, metal decorative coatings, and drying kinetics
Oil raw material	8001-26-1	L304664	Linseed oil	≥99%	Used in research on oil modification of alkyd resins, oxidative drying, hardness development, and wood coatings
Aromatic dibasic acid	100-21-0	P108506	Terephthalic acid (PTA)	≥99%	Used in research on polyester resins, industrial coatings, hardness adjustment, and chemical resistance
Diol	126-30-7	N103689	Neopentyl glycol (NPG)	≥99%	Used in research on polyester resins, alkyd resins, hydrolysis resistance, hardness, and industrial coatings
Multifunctional alcohol	77-99-6	T110597	Trimethylolpropane (TMP)	≥98%	Used in research on branched structures, crosslink density, and hardness adjustment of alkyd, polyester, and polyurethane resins

Table 5. Products Related to Silane Coupling, Adhesion Promotion, and Interfacial Modification

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Amino silane coupling agent	919-30-2	A107147	3-Aminopropyltriethoxysilane (APTES)	≥99%	Used in research on interfacial bonding between metals, glass, inorganic fillers, and resins, adhesion promotion, and surface modification
Methacryloxy silane coupling agent	2530-85-0	S111153	3-(Methacryloxy)propyltrimethoxysilane (MPS)	≥97%, contains 100 ppm BHT stabilizer	Used in research on silane modification of acrylic resins, surface treatment of inorganic fillers, water resistance, and adhesion
Epoxy silane coupling agent	2530-83-8	G107576	3-Glycidyloxypropyltrimethoxysilane	≥97%	Used in research on adhesion promotion in epoxy and acrylic systems, and interfacial modification of metal and inorganic substrates

Note: The above are representative Aladdin products. For more product specifications, please search by “product name / CAS / item number” on the Aladdin official website.

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] Stoye D., Freitag W. Paints, Coatings and Solvents. 2nd ed. Weinheim: Wiley-VCH, 1998.

[4] Dieterich D. Aqueous emulsions, dispersions and solutions of polyurethanes: synthesis and properties. Progress in Organic Coatings, 1981, 9(3): 281–340.

[5] Coutinho F. M. B., Delpech M. C. Some properties of films cast from polyurethane aqueous dispersions of polyether-based anionomer extended with hydrazine. Polymer Testing, 1996, 15(2): 103–113.

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

[7] Pieters K., Mekonnen T. H. Progress in waterborne polymer dispersions for coating applications: commercialized systems and new trends. RSC Sustainability, 2024.

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