Vinyl Ester Resin Systems: Structural Features, Curing Mechanism, and Key Application Considerations

1 Basic Positioning of Vinyl Ester Resins

1.1 Similar Names, Different Structures and Application Logic

Vinyl ester resin, commonly abbreviated as VER, is easily mistaken for the same type of material as polyvinyl acetate emulsion (PVAc), vinyl acetate-ethylene copolymer emulsion (VAE), vinyl-acrylic emulsion, or vinyl chloride-vinyl acetate copolymer resin because its name contains the term “vinyl.”

In fact, vinyl ester resin differs significantly from common vinyl film-forming resins such as PVAc, VAE, vinyl-acrylic emulsion, and vinyl chloride-vinyl acetate copolymer resin in terms of structural origin, curing method, coating film structure, and application direction.

Resin Type	Main Structural Source	Common Form	Film-Forming or Curing Method	Typical Applications
Polyvinyl acetate emulsion	Polymerization of vinyl acetate	Waterborne emulsion	Water evaporation and coalescence of latex particles into a film	Architectural coatings, adhesives
Vinyl acetate-ethylene copolymer emulsion	Copolymerization of vinyl acetate and ethylene	Waterborne emulsion	Water evaporation and coalescence of latex particles into a film	Interior wall coatings, engineering coatings
Vinyl-acrylic emulsion	Copolymerization of vinyl acetate and acrylates	Waterborne emulsion	Water evaporation and coalescence of latex particles into a film	Architectural coatings
Vinyl chloride-vinyl acetate copolymer resin	Copolymerization of vinyl chloride and vinyl acetate	Solid resin or resin solution	Mostly film formation through solvent evaporation	Inks, plastic coatings, heat-seal coatings
Vinyl ester resin	Reaction of epoxy resin with unsaturated carboxylic acid	Reactive liquid resin	Free-radical crosslinking and curing	Heavy-duty corrosion protection, storage tanks, pipelines, FRP

1.2 Film Formation and Curing Methods Determine Application Differences

Common vinyl emulsions mainly form coating films through water evaporation and coalescence of latex particles, and therefore belong to waterborne film-forming systems. Vinyl chloride-vinyl acetate copolymer resins mostly form films through evaporation of organic solvents and belong to thermoplastic physical film-forming systems. Vinyl ester resins are different. Their primary film-forming and curing mechanism is chemical crosslinking, rather than simple evaporation of water or solvent. However, systems containing reactive diluents such as styrene still require attention to volatilization, odor, VOCs, and occupational exposure.

Comparison Item	Common Vinyl Emulsions / Vinyl Chloride-Vinyl Acetate Copolymer Resins	Vinyl Ester Resin
Resin state	Waterborne emulsion, solid resin, or resin solution	Reactive liquid resin
Film-forming method	Film formation after water or solvent evaporation	Chemical crosslinking and curing
Coating film structure	Mainly thermoplastic or weakly crosslinked structure	Three-dimensional crosslinked network structure
Main value	Cost, processability, adhesion, decoration, or heat sealing	Water resistance, corrosion resistance, chemical resistance
Typical uses	Architectural coatings, inks, plastic coatings	Heavy-duty corrosion protection, FRP, chemical equipment

1.3 Correct Understanding: A Reactive Crosslinked Anti-Corrosion Resin

Vinyl ester resin is a type of reactive resin based on an epoxy resin backbone and containing unsaturated terminal groups that can undergo free-radical curing. Its main value lies in industrial applications that require corrosion resistance, water resistance, chemical resistance, and relatively high mechanical strength.

2 Structural Features of Vinyl Ester Resins

2.1 Basic Structural Origin

Vinyl ester resins are usually prepared by reacting epoxy resins with unsaturated monocarboxylic acids. Common unsaturated monocarboxylic acids include acrylic acid and methacrylic acid. The structure of vinyl ester resin can be understood through the following components:

Structural Component	Main Function
Epoxy resin backbone	Provides the basis for mechanical strength, toughness, adhesion, and chemical resistance
Ester linkage structure	Connects the epoxy backbone with the unsaturated terminal groups
Unsaturated double-bond terminal groups	Participate in free-radical curing reactions
Reactive diluent	Reduces viscosity and participates in crosslinking and curing
Crosslinked network	Provides water resistance, media resistance, and thermomechanical performance

2.2 Role of the Epoxy Backbone

The epoxy backbone in vinyl ester resins is an important reason why they differ from ordinary unsaturated polyester resins. The epoxy backbone can provide the resin with better toughness, adhesion, mechanical performance, and chemical resistance. Common vinyl ester resin backbones include:

Backbone Type	Main Features	Common Uses
Bisphenol A epoxy vinyl ester	Balanced overall performance, with good water resistance, acid and alkali resistance, and toughness	General corrosion protection, storage tanks, pipelines, linings
Epoxy novolac vinyl ester	Higher crosslink density, with better heat resistance, solvent resistance, and resistance to severe corrosion	High-temperature corrosion, strong acids, harsh chemical environments
Specially modified vinyl ester	Designed according to requirements for flexibility, flame retardancy, low shrinkage, or low emissions	Specialty corrosion protection, composites, functional coatings

2.3 Unsaturated Terminal Groups and Free-Radical Crosslinking Curing

Vinyl ester resin molecules contain polymerizable unsaturated double-bond terminal groups. These unsaturated terminal groups can participate in free-radical polymerization under the action of initiators and co-cure with reactive diluents to form a three-dimensional crosslinked structure.

Free-radical curing usually requires an initiator and an accelerator system. Common initiators include peroxides, such as methyl ethyl ketone peroxide (MEKP). The specific initiator dosage, accelerator system, and curing conditions should be determined according to the resin grade, application temperature, gel time, application thickness, and target performance.

The performance changes brought about by crosslinking curing are as follows:

Curing Result	Significance for Performance
Formation of a three-dimensional network structure	Improves water resistance, solvent resistance, and chemical resistance
Restricted molecular chain mobility	Improves hardness, heat resistance, and dimensional stability
Bonding with glass fibers	Suitable for fiber reinforced plastic (FRP) structural parts and corrosion-resistant equipment
The main process of network formation does not rely on water or solvent evaporation	Suitable for linings, glass flake coatings, and composite molding; however, systems containing reactive diluents still need to control volatilization and VOCs
Degree of curing affects final performance	Insufficient curing reduces media resistance, hardness, and mechanical properties

3 How Structure Determines Performance

3.1 Why Corrosion Resistance Is Outstanding

The corrosion resistance of vinyl ester resin mainly comes from three aspects:

① The epoxy backbone provides good chemical resistance and mechanical strength;

② The unsaturated terminal groups form a crosslinked network after curing, reducing the risk of media penetration and swelling;

③ Compared with ordinary unsaturated polyester resins, vinyl ester resins usually have a lower density of hydrolysis-sensitive ester bonds, resulting in relatively better hydrolytic stability.

Structural Factor	Contribution to Corrosion Resistance
Epoxy backbone	Provides the basis for chemical resistance, toughness, and mechanical strength
Unsaturated terminal groups	Form a crosslinked network after curing
Crosslinked structure	Reduces the penetration of water, solvents, and corrosive media
Lower density of hydrolysis-sensitive ester bonds	Usually provides better hydrolytic stability than ordinary unsaturated polyester resins
Can be compounded with glass flakes and glass fibers	Enhances barrier properties, mechanical strength, and corrosion-resistant service life

3.2 Why Vinyl Ester Resins Combine Characteristics of Epoxy and Unsaturated Polyester Resins

Vinyl ester resins are often considered to combine some of the characteristics of epoxy resins and unsaturated polyester resins.

Source	Characteristics Provided
Epoxy resin backbone	Good adhesion, toughness, corrosion resistance, and mechanical performance
Unsaturated double bonds	Enable relatively fast curing through free-radical reactions
Reactive diluent	Reduces system viscosity, facilitating application and composite molding
Crosslinked network	Provides water resistance, heat resistance, and chemical resistance

Compared with epoxy resins, vinyl ester resins generally have free-radical curing and molding characteristics closer to those of unsaturated polyester systems. Compared with ordinary unsaturated polyester resins, vinyl ester resins usually offer better toughness, water resistance, and chemical corrosion resistance. Therefore, vinyl ester resins are suitable for industrial applications that require both corrosion resistance and mechanical strength, while also demanding good processing and molding efficiency.

3.3 Performance Differences Among Different Vinyl Ester Resins

Influencing Factor	Effect on Performance
Bisphenol A or novolac backbone	Determines the level of general corrosion resistance, heat resistance, and solvent resistance
Acrylic acid or methacrylic acid terminal groups	Affects curing reactivity, hydrolytic stability, and media resistance
Crosslink density	Affects heat resistance, solvent resistance, hardness, and brittleness
Reactive diluent	Affects viscosity, VOCs, odor, shrinkage, and construction safety
Curing system	Affects gel time, completeness of curing, and final resistance properties
Glass fiber or fillers	Affect mechanical strength, crack resistance, barrier properties, and cost

4 Typical Application Directions

4.1 Anti-Corrosion Coatings, Linings, and Glass Flake Systems

One of the important applications of vinyl ester resins is in heavy-duty anti-corrosion coatings and corrosion-resistant linings. They are suitable for humid environments, immersion service, acid and alkali contact, saltwater contact, and chemical media environments. Typical applications include:

Application Direction	Main Requirements
Internal linings for chemical storage tanks	Resistance to specific acids and alkalis, certain solvents, and long-term immersion; confirmation is required based on the medium, concentration, and temperature
Corrosion protection for pipelines and pipe fittings	Corrosion resistance, temperature resistance, pressure resistance, and resistance to media penetration
Linings for chimneys and flue gas desulfurization units	Resistance to acidic condensate and humid heat
Wastewater treatment facilities	Resistance to acids and alkalis, moisture, and microbiologically influenced corrosion
Anti-corrosion flooring	Chemical resistance, wear resistance, and anti-permeation properties
Glass flake coatings	Improved barrier properties and corrosion-resistant service life

Glass flake coatings use flake-shaped glass to extend the penetration path of corrosive media. When combined with vinyl ester resin, they can significantly improve the barrier properties and corrosion-resistant service life of the coating.

4.2 FRP Storage Tanks, Pipelines, and Equipment

Vinyl ester resins can be combined with glass fiber reinforcements to produce corrosion-resistant FRP equipment. In such applications, the resin not only provides media resistance but also needs to form a stable composite structure with the glass fibers. Common products include chemical storage tanks, acid and alkali storage vessels, corrosion-resistant pipelines, ducts and scrubbers, chemical equipment linings, electrolytic cells, and related components.

In FRP applications, the resin must maintain mechanical properties and corrosion resistance during media immersion, temperature fluctuations, mechanical loading, and long-term service. Resin selection, fiber wet-out, degree of curing, and construction quality all affect the final service life.

4.3 Key Considerations for Use in Chemical Media and Highly Humid Corrosive Environments

Vinyl ester resins can be used in many high-humidity, immersion, saltwater, and acidic media environments. They can also be used in certain validated alkaline or solvent media environments. However, their applicability is affected by resin type, product model, medium concentration, temperature, and contact mode, and should not be generalized apart from actual service conditions.

Service Condition Factor	Key Considerations
Type of medium	Acids, alkalis, saltwater, solvents, and oxidizing agents affect the resin differently
Medium concentration	Higher concentrations usually intensify penetration, swelling, or chemical degradation
Service temperature	Higher temperatures accelerate corrosion and media penetration
Contact mode	Intermittent contact and long-term immersion involve different levels of risk
Mechanical stress	Affects cracking, delamination, and long-term service life
Construction defects	Pinholes, bubbles, and insufficient curing reduce protective performance

5 Comparison with Epoxy Resins and Unsaturated Polyester Resins

5.1 Comparison with Epoxy Resins

Epoxy resins are widely used in anti-corrosion coatings, flooring, primers, and structural bonding. Vinyl ester resins contain an epoxy backbone, but their curing method and application focus differ from those of epoxy resins.

Item	Epoxy Resin	Vinyl Ester Resin
Curing method	Mostly step-growth curing reactions such as epoxy-amine or epoxy-anhydride curing	Mostly free-radical crosslinking curing
Adhesion	Usually very good	Good, but depends on substrate preparation and system design
Water resistance	Good, depending on the curing system	Usually very good; suitable for immersion and corrosion-resistant linings
Chemical resistance	Excellent, but strongly affected by the curing agent	Excellent; especially suitable for many corrosive media
Application speed	Depends on curing agent and temperature	Gel time and curing speed can be adjusted, but the application window must be controlled
FRP suitability	Can be used in some composite systems	Highly suitable for corrosion-resistant FRP equipment
Outdoor weatherability	Ordinary epoxy resins tend to chalk	Usually also require a compatible topcoat or protective design

Epoxy resins are more suitable for many high-adhesion primers, floor primers, and structural bonding systems. Vinyl ester resins are more suitable for corrosion-resistant linings, FRP, anti-corrosion equipment, and chemical media environments confirmed by chemical resistance tables.

5.2 Comparison with Unsaturated Polyester Resins

Unsaturated polyester resin (UPR), like vinyl ester resin, can be cured through free-radical reactions and is also commonly used in FRP and composite materials. However, ordinary UPR usually has a higher density of hydrolysis-sensitive ester bonds, so its hydrolytic resistance, corrosion resistance, and toughness are generally inferior to those of vinyl ester resin.

Item	Unsaturated Polyester Resin	Vinyl Ester Resin
Cost	Usually lower	Usually higher
Processability	Good	Good
Curing method	Free-radical curing	Free-radical curing
Water resistance	Moderate, depending on the grade	Usually better
Chemical resistance	Moderate to good	Usually stronger
Toughness	Average	Usually better
Shrinkage	May be relatively significant	Still has shrinkage, but crack resistance is usually better
Suitability for corrosion protection	Ordinary corrosive environments	More suitable for harsh corrosive environments

The advantage of vinyl ester resin is that it retains processing convenience similar to UPR while improving toughness, water resistance, and corrosion resistance through the epoxy backbone.

5.3 Application Positioning of the Three Types of Resins

Resin Type	Main Advantages	Main Limitations	More Suitable Applications
Epoxy resin	Strong adhesion, good mechanical properties, good anti-corrosion foundation	Ordinary epoxy resins have limited weatherability; some systems have strict application windows	Primers, flooring, anti-corrosion primers, structural bonding
Unsaturated polyester resin	Low cost, easy processing, suitable for composites	Water resistance, corrosion resistance, and toughness are usually inferior to vinyl ester resin	General FRP, molded parts, low- to medium-requirement composites
Vinyl ester resin	Balanced corrosion resistance, water resistance, toughness, and processability	Higher cost; curing and construction management requirements are high	Heavy-duty corrosion protection, FRP storage tanks, pipelines, linings, chemical environments

6 Use Limitations and Construction Risks

6.1 Media Resistance Cannot Be Generalized

Influencing Factor	Effect on Performance
Type of medium	Acids, alkalis, solvents, and oxidizing agents affect the resin differently
Medium concentration	Higher concentrations usually increase corrosion risk
Service temperature	Higher temperatures accelerate penetration, swelling, and chemical degradation
Contact mode	Long-term immersion imposes higher requirements than short-term contact
Degree of curing	Incomplete curing significantly reduces media resistance
Coating defects	Pinholes, bubbles, and cracks can become corrosion pathways

6.2 Curing System and Degree of Curing Determine Final Performance

The final performance of vinyl ester resin depends not only on the resin itself, but also on the curing system and degree of curing. Free-radical curing is significantly affected by initiators, accelerators, temperature, application thickness, gel time, and curing conditions. Common risks include:

Risk	Possible Consequence
Insufficient initiator dosage	Incomplete curing; reduced hardness, strength, and media resistance
Excessive initiator dosage	Gelation occurs too quickly, resulting in insufficient working time and increased exotherm risk
Improper accelerator combination	Abnormal curing speed or unstable performance
Low-temperature application	Slow curing, tacky surface, and insufficient final performance
Thick coating or large-volume application	Excessive exotherm, cracking, or internal defects
Insufficient post-curing	Heat resistance and chemical resistance cannot be fully developed

For long-term immersion, strongly diffusive media, or relatively high-temperature service conditions, short-term surface drying or hardening does not mean that media resistance has been fully established. The required curing time and whether post-curing is needed should be confirmed.

6.3 Odor, VOCs, and Safety Issues Caused by Reactive Diluents

Many vinyl ester resins use reactive diluents to reduce viscosity and participate in curing. In traditional vinyl ester resin systems, styrene is a common reactive diluent, although low-styrene and non-styrene modified systems are also available. Styrene can reduce resin viscosity and participate in crosslinking, but it also introduces issues related to odor, VOCs, occupational exposure, and construction safety.

During vinyl ester resin application, attention should be paid to ventilation, personal protection, VOC emissions, storage safety, separate management of initiators and accelerators, fire and explosion prevention, and control of residual monomers and odor.

6.4 Curing Shrinkage, Exotherm, and Construction Defect Risks

During curing, vinyl ester resin changes from a liquid state into a crosslinked solid. This process may involve volumetric shrinkage and heat release. If formulation design, application thickness, or curing speed is not properly controlled, cracking, warping, delamination, bubbles, or internal stress concentration may occur.

Problem	Possible Cause
Cracking	High curing shrinkage, high exotherm, overly rapid crosslinking
Delamination	Insufficient substrate preparation, interlayer contamination, or improper application interval
Bubbles and pinholes	Air entrainment during mixing, insufficient wet-out, or poor release of volatiles
Increased brittleness	Excessively high crosslink density or unreasonable filler system
Media penetration	Incomplete curing, excessive porosity, or coating defects

For thick-film linings, glass flake coatings, and FRP products, construction quality is very important to the final corrosion-resistant service life. Excellent resin performance cannot compensate for poor substrate preparation, insufficient curing, or construction defects.

7 Key Factors to Consider During Selection

When selecting vinyl ester resin, attention should be focused on the following indicators:

Indicator	Function
Resin backbone	Determines whether it is bisphenol A type, novolac type, or a specially modified type
Chemical resistance table	Determines applicability under the target medium, concentration, temperature, contact mode, and recommended post-curing conditions
Viscosity	Affects application, wet-out, roller coating, spraying, or fiber-reinforced molding
Gel time	Affects the application window and curing speed
Heat Deflection Temperature (HDT)	Determines heat resistance and suitability for high-temperature media
Curing system	Determines reaction speed, degree of curing, and final performance
Reactive diluent	Affects VOCs, odor, shrinkage, and construction safety
Post-curing requirements	Affect final chemical resistance and heat resistance
Recommended applications	Determines whether the resin is suitable for linings, FRP, flooring, or coating systems

8. Representative Products for Vinyl Ester Resin–Related Raw Materials, Additives, and Formulation Research

Table 1. Resin Backbones and Unsaturated Acid Raw Materials

Category	CAS No.	Aladdin Cat. No.	Name	Specification or Purity	Product Features and Applications
Unsaturated acid raw material	79-10-7	A397753	Acrylic Acid	Anhydrous grade, ≥99%, contains 200 ppm MEHQ stabilizer	Used for research on terminal group introduction, esterification reactions, reactivity, and crosslinked structures in vinyl ester resins.
Unsaturated acid raw material	79-41-4	M434201	Methacrylic Acid	Suitable for synthesis, stabilized with hydroquinone monomethyl ether	Used for research on methacrylate terminal group preparation, curing reactions, and media resistance in vinyl ester resins.
Epoxy novolac backbone	28064-14-4	P477947	Poly[(phenyl glycidyl ether)-co-formaldehyde]	Average Mn ~345	Used for research on epoxy novolac vinyl ester resin backbones, and applicable to experiments involving heat resistance, solvent resistance, and high-crosslink-density systems.
Epoxy resin raw material	106-89-8	E401255	Epichlorohydrin	Industrial grade	Can be used for epoxy resin synthesis, introduction of glycidyl ether structures, and synthesis research related to vinyl ester resin precursors.
Epoxy resin raw material	80-05-7	B108651	Bisphenol A	Moligand™, chemically pure (CP)	Can be used for research related to bisphenol A epoxy resins and vinyl ester resin backbones, as well as formulation exploration for water resistance, toughness, and anti-corrosion systems.
Epoxy resin intermediate	1675-54-3	B131786	Bisphenol A Diglycidyl Ether (BADGE)	Moligand™, ≥85%	Can be used for research on bisphenol A vinyl ester resin precursors, epoxy backbone reactions, and resin structure–property relationships.

Table 2. Reactive Diluents and Crosslinking Monomers

Category	CAS No.	Aladdin Cat. No.	Name	Specification or Purity	Product Features and Applications
Reactive diluent	80-62-6	M109623	Methyl Methacrylate (MMA)	AR, ≥99%, contains 30 ppm DMBP stabilizer	Used for research on viscosity adjustment, co-curing reactions, hardness, and transparent systems in vinyl ester resins.
Reactive diluent	100-42-5	S110376	Styrene	≥99%, stabilized with 10–15 ppm 4-tert-butylcatechol	Used for experiments on reactive dilution, free-radical crosslinking, gel time, and curing of anti-corrosion composites based on vinyl ester resins.
Crosslinking monomer	3290-92-4	T131641	Trimethylolpropane Trimethacrylate (TMPTMA)	≥98%, contains 250 ppm MEHQ stabilizer	Can be used to increase the crosslink density of vinyl ester resins, and is suitable for research on heat resistance, hardness, and curing networks. The actual addition level should be verified with respect to shrinkage, brittleness, and application window.
Reactive diluent	25013-15-4	V162964	Vinyltoluene Monomer (m-, p-isomer mixture)	≥98%, stabilized with TBC	Used for experiments on low-viscosity vinyl ester resin systems, co-curing reactions, and low-volatility modification.
Crosslinking monomer	97-90-5	E106223	Ethylene Glycol Dimethacrylate (EGDMA)	≥98%, contains 90–110 ppm MEHQ as stabilizer	Can be used to adjust the crosslinked structure of vinyl ester resins, and is suitable for research on curing shrinkage, hardness, and solvent resistance. Actual formulations need to be evaluated for changes in shrinkage, brittleness, and media resistance.

Table 3. Curing Initiation, Acceleration, and Inhibition Systems

Category	CAS No.	Aladdin Cat. No.	Name	Specification or Purity	Product Features and Applications
Polymerization inhibitor	123-31-9	H431621	Hydroquinone	Suitable for synthesis	Used for research on storage stability, inhibition effects, and gel time control in vinyl ester resins and unsaturated monomers.
Amine accelerator	121-69-7	D100063	N,N-Dimethylaniline	Rectified grade, ≥99.5%	Used to accelerate peroxide curing systems, and applicable to gel time and room-temperature curing experiments for vinyl ester resins.
Peroxide initiator	1338-23-4	B707058	2-Butanone Peroxide	Active oxygen content: 9%	Used for room-temperature curing initiation, gel time adjustment, and curing experiments for anti-corrosion layers based on vinyl ester resins.
Polymerization inhibitor	106-51-4	B108671	p-Benzoquinone	Moligand™, ≥99%	Used for research on inhibition of unsaturated resins, curing rate adjustment, and storage stability.
Cobalt salt accelerator	61789-51-3	C104345	Cobalt Naphthenate	Co 7.8–8.2%, solvent: 40%–80% mineral oil	Used to accelerate peroxide curing of vinyl ester resins, and applicable to research on gel time, degree of curing, and application window.
Polymerization inhibitor	150-76-5	M104222	4-Methoxyphenol (MEHQ)	AR, ≥99%	Used for research on storage stability and polymerization inhibition in acrylates, unsaturated monomers, and vinyl ester resin systems.
Peroxide initiator	94-36-0	B104630	Benzoyl Peroxide (BPO)	AR	Used for research on free-radical curing, composite molding, and curing kinetics of vinyl ester resins.
Cobalt salt accelerator	136-52-7	C282475	Cobalt(II) 2-Ethylhexanoate Solution	65 wt.% in mineral spirits	Used to accelerate peroxide curing systems, and suitable for room-temperature curing and gel time control experiments with vinyl ester resins.
Amine accelerator	99-97-8	N158974	N,N-Dimethyl-p-toluidine	≥98% (GC)	Used in free-radical curing acceleration systems, and applicable to research on curing rate and low-temperature curing of vinyl ester resins.
Peroxide initiator	614-45-9	B111162	tert-Butyl Peroxybenzoate (TBPB)	≥98%	Used for research on heat-curing, molding processes, and curing networks of vinyl ester resins.
Peroxide initiator	80-15-9	C109598	Cumene Hydroperoxide	≥80%	Used in redox curing systems for vinyl ester resins, and applicable to experiments on gel time and degree of curing adjustment.

Table 4. Reinforcing Fillers, Flame-Retardant Fillers, and Thixotropic Modifiers

Category	CAS No.	Aladdin Cat. No.	Name	Specification or Purity	Product Features and Applications
Reinforcing filler	65997-17-3	F770993	Glass Fiber Powder	300 mesh	Used for research on reinforcement of vinyl ester resin composites, anti-corrosion linings, mechanical properties, and dimensional stability.
Flame-retardant filler	21645-51-2	A110529	Aluminum Hydroxide	≥99.6%, 1–3 μm	Used for research on flame-retardant filling, smoke suppression, filler dispersion, and composite performance in vinyl ester resins.
Thixotropic filler	112945-52-5	S491206	Fumed Silica	≥99%	Used for research on thixotropy adjustment, anti-settling, anti-sagging, and application performance of glass flake coatings in vinyl ester resin systems.
Filler material	471-34-1	C432743	Calcium Carbonate	≥98%, powder, ≤50 μm	Used for experiments on filler modification, cost control, shrinkage adjustment, and coating systems based on vinyl ester resins.

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

References

[1] ScienceDirect Topics. Vinyl Ester Resin — An Overview.

[2] AOC. Vinyl Ester Resin Product Information. AOC Formulations.

[3] INEOS Composites. Resin Selection Guide for Chemical Resistance: DERAKANE™ Epoxy Vinyl Ester Resins.

[4] AOC. Vipel® F085 Series: Corrosion Resistant Epoxy Novolac Vinyl Ester Formulation.

[5] INEOS Composites. DERAKANE™ Epoxy Vinyl Ester Resins. INEOS Composites Product Information.

[6] Interplastic Corporation. Proper Cure of Vinyl Ester Resins. Interplastic Technical Paper.

For more related articles, please see below:

A Panorama Guide to Synthetic Resins: Definitions & Polymerization Mechanisms, Classification Frameworks, Common Resins and Applications, Packaging Codes, and a Selection Roadmap (Tables 1–3)

A Complete Guide to Selecting Epoxy Curing Systems: Amines vs. Anhydrides vs. Latent Curing — with Aladdin’s Recommended Selection Table

Formulation Design and Selection of Amine Curing Agents in Epoxy Systems

Epoxy Silane Coupling Agents: Structural Features, Classification, Typical Applications, and Precautions for Use