Applicability Boundaries, Failure Risks, and Alternative System Selection for Chlorinated Rubber Resin in Coatings

1 Basis of Applicability and Sources of Limitation for Chlorinated Rubber Resin

Chlorinated rubber resin offers fast drying, one-component application, easy recoating, water resistance, salt resistance, and convenient maintenance. It is therefore commonly used in maintenance protective coatings, swimming pool coatings, road-marking coatings, and some industrial anticorrosive coatings. However, chlorinated rubber resin is not a universal anticorrosive resin. Its advantages and limitations originate from the same material basis.

Material characteristic	Advantages provided	Resulting limitations
High chlorine-content structure	Good water resistance, salt resistance, and barrier properties	Film flexibility needs to be adjusted through formulation
Thermoplastic resin	Fast drying, easy recoating, and convenient maintenance	Limited resistance to strong solvents and high temperatures
Film formation by physical drying	One-component application without complex curing reactions	Does not provide the chemical resistance and mechanical strength of highly crosslinked films
Can be re-wetted by solvents	Good intercoat adhesion; suitable for repair and maintenance recoating	Improper recoating may cause lifting, softening, or wrinkling

2 Typical Conditions Where Chlorinated Rubber Resin Should Not Be the First Choice

2.1 Strong Solvents, Oils, and Organic Chemical Environments

Chlorinated rubber resin is a thermoplastic resin and can dissolve in suitable organic solvents. Although the film formed after application provides a certain level of protection, it may still swell, soften, or lose strength under the action of strong solvents or specific organic media.

Therefore, if the coating is exposed for a long time to strong solvents such as aromatic hydrocarbons, ketones, and esters, or to fuels and organic cleaning agents containing strong solvent components, chlorinated rubber resin should generally not be the first choice. For media such as mineral oil, lubricating oil, and greases, verification should be carried out based on the specific formulation, media composition, temperature, and mode of contact.

Contact medium	Possible risk
Strong solvents such as aromatic hydrocarbons, ketones, and esters	Film swelling, softening, loss of gloss, or wrinkling
Aromatic hydrocarbon-containing fuels, certain greases, or oily contamination environments	Film softening, contamination, cleaning difficulty, or reduced adhesion; testing should be performed based on media composition
Organic cleaning agents	Surface tackiness, gloss change, or localized damage
Recoating with strong-solvent coatings	Excessive softening of the old film, resulting in lifting or wrinkling

2.2 High Temperature, Temperature Cycling, and Hot Surfaces

Chlorinated rubber resin is not a high-temperature-resistant resin. Because it is a thermoplastic material that forms a film by physical drying, long-term exposure to relatively high temperatures may lead to film softening, loss of gloss, discoloration, reduced adhesion, or accelerated aging.

Condition	Possible effect
Long-term hot surfaces	Film softening and reduced indentation resistance
High temperature combined with humidity	Accelerated water vapor permeation and corrosion
Temperature cycling	Increased internal stress in the film and higher risk of cracking
High-temperature chemical media	Faster media permeation and coating film failure
Baking-type application	Not suitable for ordinary physically drying chlorinated rubber systems

Ordinary chlorinated rubber resin systems should not be the first choice for hot pipelines, boilers, furnaces, chimneys, long-term high-temperature equipment surfaces, or baking coatings. The specific temperature resistance range should be determined based on the product technical data and actual testing. Even a dedicated chlorinated rubber swimming pool system should not be automatically assumed to be suitable for high-temperature hot water, SPA hydrotherapy pools, hot-water pools, hot pipelines, or long-term hot surfaces.

2.3 High-Decorative Weatherability and Long-Term Outdoor Gloss Retention Requirements

Chlorinated rubber resin can be used in some outdoor protective coatings, but long-term gloss retention, color retention, and high-decorative weatherability are not its primary strengths. During long-term outdoor exposure, the coating film is affected by ultraviolet radiation, rainwater, humid heat, temperature cycling, industrial pollutants, and salt spray. Chlorinated rubber films may show chalking, loss of gloss, color change, or surface roughening.

Application requirement	Limitation of chlorinated rubber systems
Long-term high-gloss topcoat	Gloss retention is usually not as good as that of specialized weather-resistant resins
High-decorative equipment topcoat	Limited color stability and appearance retention
Long-term exposure to strong ultraviolet radiation	Increased risk of chalking and gloss loss
Long-cycle, maintenance-free appearance	A weather-resistant topcoat may be required, or the system may need to be changed

If the coating application requires long-term high gloss, high DOI, color stability, and excellent weatherability, systems such as aliphatic polyurethane, acrylic, and fluorocarbon coatings are usually more suitable.

2.4 Limitations of Ordinary Systems in Long-Term Immersion and Strongly Corrosive Media

Chlorinated rubber resin has a good basic level of water resistance, and some dedicated chlorinated rubber coatings can be used in swimming pools, marine environments, or immersion-related applications. However, “water resistance” does not mean that ordinary chlorinated rubber systems are suitable for all long-term immersion environments. Long-term immersion is more severe than ordinary humid conditions. The coating film must continuously withstand water pressure, salt penetration, pool-water treatment chemicals, substrate vapor pressure, temperature changes, and microbial effects. For applications such as swimming pools, water storage tanks, seawater immersion, and underground damp structures, dedicated pool/immersion-grade products should be distinguished from general maintenance-grade products, and the final decision should be based on product instructions, the coating system, and actual testing.

Environmental condition	Possible risk
Long-term water immersion	Blistering, reduced adhesion, or film softening
Long-term saltwater immersion	Continuous salt penetration and increased risk of substrate corrosion
Strong acids or strong alkalis	Film damage, chalking, or reduced adhesion
Oxidizing media	Accelerated resin aging
High-temperature chemical media	Faster permeation and reduced media resistance

3 Common Failure Signals, Cause Analysis, and Adjustment Directions

3.1 Film Softening, Tackiness, and Swelling

Film softening, tackiness, and swelling are usually related to the effect of solvents, organic media, or residual solvents on the thermoplastic resin.

Common symptom	Possible cause	Key points to check	Adjustment direction
Surface tackiness	Solvent residue, excessive plasticizer, or oil contamination	Check application film thickness, ventilation conditions, drying time, and surface contaminants	Extend drying time, improve ventilation, reduce single-coat film thickness, and adjust plasticizer dosage
Film softening	Long-term contact with strong solvents, fuels, or oils	Confirm the type of contact medium, contact duration, and temperature	If exposure to the medium is unavoidable, switch to an epoxy, polyurethane, or vinyl ester system
Localized swelling	Organic media penetration into the film	Check whether the medium is an aromatic hydrocarbon, ketone, ester, or cleaning agent	Avoid contact with strong solvents; use a solvent-resistant or chemical-resistant system when necessary
Abnormal gloss	Solvent attack, surface contamination, or film softening	Check cleaning agents, oil contamination, recoating solvents, and service environment	Clean the surface and adjust the solvent system; if the issue recurs, switch to a more media-resistant system
Reduced mechanical strength	Plasticization of the film by media or insufficient release of internal solvent	Check through-drying condition, film thickness, media contact, and plasticizer migration	Reduce film thickness and optimize solvent release; if caused by the medium, change the resin system

If film softening is caused by long-term contact with strong solvents or oils, simply reducing plasticizer content or extending drying time is usually insufficient to solve the problem fundamentally. The resin system should be reassessed.

3.2 Recoating Lifting, Wrinkling, and Intercoat Problems

Chlorinated rubber coatings have good recoatability because the solvent in the new coat can wet and slightly swell the surface of the old film. This is beneficial for intercoat adhesion. However, if the solvent action is too strong, it may also cause lifting, wrinkling, or softening of the old film.

Common symptom	Possible cause	Key points to check	Adjustment direction
Lifting	Excessive solvency of the solvent in the new coat	Check the proportion of strong solvent in the new coating and the solvent resistance of the old film	Reduce the proportion of strong solvent, use a milder thinning system, and conduct a small-area trial application first
Wrinkling	Excessive softening of the old film, or wet film applied too thick	Check recoat film thickness, drying degree of the old film, and solvent evaporation rate	Control wet film thickness, extend the recoat interval, and adjust the solvent evaporation gradient
Tackiness after recoating	Old film not fully dried, or solvent retention in the new coat	Check through-drying of the old film, ventilation conditions, and ambient temperature	Extend drying time of the old film, improve ventilation, and reduce single-pass application thickness
Poor intercoat adhesion	Contamination, chalking, or type mismatch of the old coating	Check the old coating type, surface cleanliness, and chalking condition	Clean and sand the old film; confirm the old coating type; use a suitable primer/tie coat or change the system if necessary
Loss of gloss after recoating	Excessive solvent action or insufficient intercoat compatibility	Check compatibility between new and old coatings and the strength of the recoating solvent	Adjust the solvent system, reduce wet film thickness, and verify recoating compatibility

The type of old coating and intercoat compatibility have a significant impact on recoating safety. Before recoating, the old film type, drying condition, and surface state should be confirmed. For epoxy, acrylic, polyurethane, or unknown old coatings, direct application is not recommended; small-area compatibility, adhesion, and lifting tests should be carried out first.

3.3 Brittleness, Cracking, and Insufficient Flexibility

After chlorination modification, the molecular-chain flexibility of chlorinated rubber resin decreases. If flexibility is insufficiently adjusted in the formulation, or if the application and substrate conditions are unsuitable, the film may become brittle, crack, or show inadequate flexibility.

Common symptom	Possible cause	Key points to check	Adjustment direction
Film is too hard	Insufficient plasticizer or excessive chlorinated rubber resin ratio	Check film hardness, bending performance, and plasticizer dosage	Adjust the plasticizer and appropriately introduce compatible co-resins
Cracking during bending	Insufficient flexibility or significant substrate deformation	Check substrate deformation, film thickness, and low-temperature flexibility	Improve flexibility design, control film thickness, and use a more flexible system if necessary
Thick-film cracking	Single-pass application is too thick, causing slow internal solvent release	Check single-coat film thickness, drying conditions, and internal solvent residue	Reduce single-coat thickness, apply in multiple coats, and optimize solvent release
Brittle cracking at low temperature	Insufficient low-temperature film formation or reduced film flexibility	Check application temperature, drying time, and low-temperature service conditions	Avoid low-temperature application, extend drying time, and adjust the plasticizer and resin combination
Cracking at edges and corners	Uneven edge film thickness, stress concentration, or insufficient substrate preparation	Check edge film thickness, substrate preparation, and coating continuity	Improve the application method, control edge film thickness, and strengthen substrate preparation

Such problems cannot simply be attributed to the resin itself. Resin, plasticizer, pigments and fillers, film thickness, application environment, and substrate deformation all affect the final result.

3.4 Reduced Adhesion, Blistering, and Peeling

Chlorinated rubber resin has a certain adhesion basis on metal and mineral substrates, but actual adhesion still depends heavily on substrate preparation, the condition of the old coating, film-thickness control, and application environment.

Common symptom	Possible cause	Key points to check	Adjustment direction
Localized detachment	Oil, salt, dust, or rust on the substrate not fully removed	Check surface cleanliness, rust-removal quality, and soluble salt residues	Strengthen degreasing, rust removal, and salt removal; reassess the surface preparation grade
Blistering	High substrate moisture content, salt residue, or insufficient internal solvent release	Check concrete moisture content, steel salt contamination, and film through-drying	Control substrate moisture content, remove salts, reduce single-coat film thickness, and extend drying time
Peeling	Incompatibility with the old coating or intercoat contamination	Check old coating type, surface chalking, and pretreatment before recoating	Sand and clean the old film, conduct a small-area recoat test, and change the coating system if necessary
Edge lifting	Insufficient edge sealing or mechanical stress concentration	Check edge treatment, film-thickness continuity, and coating integrity	Strengthen edge and corner sealing, control film thickness uniformity, and improve edge treatment quality
Poor intercoat adhesion	Unreasonable recoat interval, surface contamination of the old film, or excessive hardening	Check recoat interval, surface condition, and intercoat wetting	Clean or lightly sand the old film, adjust recoating time and solvent system

Adhesion problems are usually closely related to substrate preparation. Even if the resin itself has an adhesion basis, stable film performance cannot be achieved if substrate preparation is inadequate.

3.5 Chalking, Loss of Gloss, and Color Change

Chalking, gloss loss, and color change are mostly related to long-term outdoor exposure, ultraviolet radiation, pollutants, pigment stability, and film aging.

Common symptom	Possible cause	Key points to check	Adjustment direction
Chalking	Resin aging, pigment/filler exposure, or ultraviolet action	Check exposure duration, ultraviolet intensity, and degree of surface chalking	Use a weather-resistant topcoat system and shorten the maintenance cycle; switch systems when high weatherability is required
Loss of gloss	Surface aging, contaminant deposition, or insufficient resin weatherability	Check gloss retention, surface contamination, and recovery after cleaning	Optimize topcoat selection and use weather-resistant resins or pigments
Color becomes lighter or darker	Insufficient pigment weatherability, resin yellowing, or environmental contamination	Check pigment type, pollutants, and ultraviolet exposure conditions	Use weather-resistant pigments; switch to acrylic, polyurethane, or fluorocarbon systems when necessary
Surface roughening	Aging, abrasion, or chalking causing surface-structure damage	Check whether the film surface is chalked, worn, or contaminated	Clean, sand, and recoat; improve coating weatherability and abrasion-resistance design
Localized discoloration	Local action of chemicals, cleaning agents, or contaminants	Check contact media, cleaning method, and contamination source	Control contamination sources and adjust cleaning agents; use a chemical-resistant or weather-resistant system when necessary

If the coating application has high requirements for long-term appearance retention, weather-resistant acrylic, aliphatic polyurethane, or fluorocarbon systems should be prioritized instead of relying solely on chlorinated rubber resin.

4 Alternative Selection Directions

4.1 Epoxy Systems

Epoxy systems are usually suitable for applications requiring high adhesion, chemical resistance, abrasion resistance, and heavy-duty corrosion protection. Compared with chlorinated rubber, epoxy films are usually crosslinked structures and offer stronger solvent resistance, media resistance, and mechanical strength.

Situations where epoxy systems should be considered first include: ① heavy-duty anticorrosive primers or intermediate coats; ② high-abrasion-resistant flooring; ③ environments with chemical splash exposure; ④ dedicated systems for long-term immersion or humid environments; and ⑤ applications requiring high adhesion and film strength.

It should be noted that epoxy systems are mostly two-component systems. During application, mixing ratio, pot life, and recoat window must be controlled.

4.2 Polyurethane, Acrylic, and Fluorocarbon Systems

When the application places greater emphasis on outdoor weatherability, gloss and color retention, and decorative appearance, polyurethane, acrylic, and fluorocarbon systems are usually more suitable than chlorinated rubber.

System	Suitable application direction
Aliphatic polyurethane	High-decorative outdoor topcoats, weather-resistant topcoats, abrasion-resistant topcoats
Acrylic	Fast-drying outdoor topcoats, road-marking coatings, decorative coatings
Fluorocarbon	Long-cycle weatherability, high gloss and color retention, severe outdoor topcoats

4.3 Vinyl Ester, Phenolic Epoxy, and Dedicated Lining Systems

For severe environments involving strong acids, strong alkalis, complex chemicals, or the internal walls of chemical storage tanks, dedicated chemical-resistant systems should be considered first.

Media condition	Alternative direction
Strong acids or strong alkalis	Vinyl ester, glass flake, dedicated chemical-resistant coatings
High-temperature chemical media	Phenolic epoxy, vinyl ester, or dedicated lining systems
Chemical storage tanks	Phenolic epoxy, vinyl ester, dedicated anticorrosive linings
Long-term seawater immersion	Epoxy, glass flake, or dedicated marine engineering systems
Highly penetrating media	Dedicated systems with high crosslink density or high barrier properties

4.4 Silicone and High-Temperature-Resistant Systems

For long-term high-temperature equipment, hot pipelines, chimneys, furnaces, and similar applications, dedicated high-temperature-resistant systems should be selected.

Service condition	Alternative direction
Medium-temperature industrial equipment	Heat-resistant epoxy or modified epoxy
Long-term hot surfaces	Silicone high-temperature-resistant coatings
High-temperature outdoor metal surfaces	Heat-resistant polyurethane or dedicated weather-resistant and heat-resistant systems
High temperature with corrosive media	Dedicated heat-resistant anticorrosive systems

5 Selection Judgment Tables

5.1 Scenarios Where Chlorinated Rubber Resin Can Still Be Considered

Scenario	Basis for judgment
Fast-drying maintenance protective coatings	Requires one-component application, fast drying, and convenient recoating
General industrial atmospheric protection	Requires water resistance, salt resistance, and barrier properties
Marine atmospheric maintenance coatings	Requires salt-spray resistance and convenient on-site repair
Swimming pool and some water-contact coatings	Requires water resistance and convenient refurbishment, but product suitability must be confirmed
Road-marking and fast-drying marking coatings	Requires fast drying, adhesion, and application efficiency
Coatings requiring simple on-site application management	Avoids complex two-component systems

5.2 Scenarios Where Other Resin Systems Should Be Evaluated First

Scenario	Reason chlorinated rubber should not be preferred	Possible direction
Long-term contact with strong solvents	Thermoplastic film may soften or swell	Epoxy, polyurethane, vinyl ester
High-temperature equipment or hot pipelines	Limited heat resistance	Silicone, heat-resistant epoxy
High-decorative outdoor topcoats	Gloss and color retention are not primary strengths	Polyurethane, acrylic, fluorocarbon
Long-term immersion in strongly corrosive media	Barrier properties and media resistance may be insufficient	Phenolic epoxy, vinyl ester, glass flake
High-abrasion industrial flooring	Mechanical strength is not a key advantage	Epoxy, polyurethane
Internal walls of chemical storage tanks	Complex media and high chemical-resistance requirements	Dedicated lining or chemical-resistant systems

5.3 Diagnostic Path After Problems Occur

When abnormalities occur in chlorinated rubber coatings, they can be evaluated in the following order:

Diagnostic step	Key point to check
Step 1	Whether the service environment exceeds the applicable range of the chlorinated rubber system
Step 2	Whether strong solvents, high temperature, long-term immersion, or strongly corrosive media are present
Step 3	Whether substrate preparation is sufficient
Step 4	Whether the coating system and old coating type are compatible
Step 5	Whether the solvent system, application film thickness, and drying time are reasonable
Step 6	Whether plasticizers, pigments/fillers, and additives affect film stability
Step 7	Whether the system needs to be changed to epoxy, polyurethane, acrylic, or a dedicated anticorrosive system

5.4 Safety, VOC, and Regulatory Compliance

Chlorinated rubber coatings are mostly solvent-based systems. During application, drying, and recoating, attention should be paid to safety and environmental issues such as VOCs, flammable solvents, ventilation, explosion prevention, occupational exposure, and waste disposal. Specific products should be comprehensively evaluated based on the SDS, Safety Data Sheet, product safety label, packaging identification, hazard statements, local VOC regulations, and application safety requirements. For procurement and formulation development of chlorinated rubber resin raw materials, attention should also be paid to carbon tetrachloride residues and relevant regulatory compliance requirements.

6 Product Tables Related to Failure Verification of Chlorinated Rubber Resin and Formulation Research for Alternative Systems

Note: The following products are representative raw materials/materials for failure verification, resin-system research, formulation design, or performance comparison. They are not equivalent to complete coating products that can be directly applied in construction. For practical applications, a comprehensive evaluation should be conducted based on coating-grade resins, curing systems, pigments and fillers, additives, application processes, SDS, and product technical data.

Table 1 Products for Strong-Solvent Exposure, Softening Risk, and Solvent-Action Verification

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Verification medium for strong-solvent exposure	1330-20-7	X112051	Xylene	Superior-grade reagent, ≥99%, xylene isomer and ethyl benzene	Can be used to evaluate aromatic solvent resistance, softening, swelling, and recoating lifting risk of chlorinated rubber coating films
Verification medium for strong-solvent exposure	141-78-6	E119698	Ethyl acetate	Anhydrous grade, ≥99.8%	Can be used in experiments on ester-solvent resistance, solvent evaporation, and recoating compatibility of chlorinated rubber coating films
Verification medium for strong-solvent exposure	67-64-1	A399717	Acetone (regulated precursor chemical)	Reagent grade, ≥99.5%	Can be used to study strong-solvent sensitivity, surface softening, and swelling behavior of chlorinated rubber coating films
Verification medium for strong-solvent exposure	123-86-4	B1521140	Butyl acetate	Extra-dry grade, ≥99%, water ≤50 ppm	Can be used to evaluate recoating solvent action, leveling, drying, and old-film softening risk in chlorinated rubber coatings
Verification medium for strong-solvent exposure	78-93-3	B1506282	Methyl ethyl ketone (regulated precursor chemical)	AR, ≥99%	Can be used in experiments on ketone-solvent resistance, fast-drying solvent action, and recoating lifting of chlorinated rubber coating films
Verification medium for strong-solvent exposure	108-88-3	T399640	Toluene (regulated precursor chemical)	ACS, ≥99.5%	Can be used for chlorinated rubber resin dissolution, aromatic solvent resistance of coating films, and residual-film softening tests
Verification medium for strong-solvent exposure	108-10-1	M492092	Methyl isobutyl ketone	≥99%	Can be used to evaluate ketone-solvent resistance, swelling behavior, and recoating solvent strength of chlorinated rubber coating films

Table 2 Products Related to Epoxy, Chemical-Resistant, and Lining Alternative Systems

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Epoxy resin alternative system	2095-03-6	B485597	Bis[4-(glycidyloxy)phenyl]methane	Isomer mixture	Can be used for research on epoxy resin systems in solvent-resistant, chemical-resistant, and high-adhesion anticorrosive coatings
Phenolic epoxy alternative system	28064-14-4	P477947	Poly[(phenyl glycidyl ether)-co-formaldehyde]	Average Mn ~345	Can be used for research on coating systems for strongly corrosive media, chemical contact, and highly crosslinked anticorrosive films
Epoxy amine curing agent	112-24-3	T103762	Triethylenetetramine (TETA)	Chemically pure (CP), ≥68%	Can be used for curing epoxy anticorrosive coatings, preparing media-resistant coating films, and evaluating crosslinked structures
Epoxy polyamide curing agent	63428-84-2	P304227	Polyamide curing agent (651)	Amine value: 400–440 mg KOH/g; viscosity at 40°C: 1500–3000 mPa·s	Can be used for research on epoxy anticorrosive primers, wet adhesion, flexibility, and coating maintenance systems
Reactive diluent monomer for vinyl ester systems	100-42-5	S110375	Styrene	CP, contains 10–15 ppm 4-tert-butylcatechol stabilizer	Can be used in formulation research for vinyl ester anticorrosive systems, glass-flake coatings, and chemical-resistant linings
Reinforcing filler for linings	65997-17-3	F770995	Glass fiber powder	2000 mesh	Can be used for research on chemical-resistant linings, glass-reinforced anticorrosive coatings, and high-barrier composite systems
Epoxy amine curing agent	111-40-0	D100059	Diethylenetriamine	≥99%	Can be used for epoxy resin curing, preparation of solvent-resistant coating films, and comparative experiments on crosslink density
Epoxy cycloaliphatic amine curing agent	2855-13-2	A104545	Isophoronediamine, cis/trans mixture (IPDA)	≥99%	Can be used for research on epoxy anticorrosive coatings, chemical-resistant coatings, and outdoor curing systems
Epoxy aromatic amine curing agent	1477-55-0	X107227	m-Xylylenediamine (MXDA)	≥99%	Can be used to evaluate fast curing, media resistance, and adhesion of epoxy anticorrosive coatings

Table 3 Products Related to Polyurethane, Acrylic, Fluorocarbon, and Silicone Alternative Systems

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Silicone modification or surface-control material	63148-62-9	S104752	Dimethyl silicone oil PMX-200	Viscosity ~1000 mPa·s, neat at 25°C	Can be used in experiments on heat-resistant coatings, surface slip, hydrophobic performance, and silicone modification
Polyurethane curing component	28182-81-2	P485967	Poly(hexamethylene diisocyanate) (PolyHDI)	Viscosity 900–1500 cP at 25°C	Can be used for research on aliphatic polyurethane topcoats, weather-resistant coatings, and high-appearance protective systems
Acrylic polymer research material	9011-14-7	P141444	Poly(methyl methacrylate) (PMMA)	General-purpose injection grade	Can be used for comparative research on acrylic coating films, hardness, transparency, and film-forming performance; for practical coating applications, coating-grade acrylic resins, emulsions, or solution resins are recommended
Fluorocarbon material research system	24937-79-9	P1492342	Polyvinylidene fluoride (PVDF)	Melt viscosity (K poise): 23.5–29.5, powder	Can be used for research on weather-resistant fluorocarbon coatings, chemical-resistant coating films, and long-term outdoor protective materials; practical coating applications require matching resin dispersion, film-forming process, and baking or curing conditions
Fluoropolymer functional filler	9002-84-0	P670338	Polytetrafluoroethylene micropowder resin (PTFE)	Average particle size: ~610 μm; apparent density: ~490 g/L	Can be used in research on low-surface-energy coatings, abrasion-resistant filling, chemical resistance, and non-stick surfaces
Acrylic monomer	141-32-2	B100036	Butyl acrylate (BA)	Chemically pure (CP), ≥98%, contains 50 ppm MEHQ stabilizer	Can be used for acrylic resin synthesis, flexibility adjustment, and film formation research for outdoor topcoats
Acrylic monomer	80-62-6	M109626	Methyl methacrylate	Standard for GC, ≥99.5% (GC), contains 30 ppm DMBP stabilizer	Can be used for acrylic resin synthesis and research on hardness, transparency, and weather-resistant film formation
Polyurethane raw material	822-06-0	H106723	Hexamethylene diisocyanate (HDI)	Moligand™, ≥99%	Can be used for research on aliphatic polyurethane coatings, weather-resistant topcoats, and crosslinking/curing systems
Silicone modification or surface-control material	63148-58-3	S140418	Silicone Oil AP 200	200 mPa·s, neat at 25°C	Can be used for silicone modification, surface control of heat-resistant coatings, and hydrophobic performance research
Polyurethane raw material	4098-71-9	I109582	Isophorone diisocyanate, mixture of isomers (IPDI)	≥99%	Can be used for research on weather-resistant polyurethane coatings, decorative protective topcoats, and crosslinked structures
Polyurethane raw material	26471-62-5	T135411	Toluene diisocyanate, 2,4-/2,6-isomer mixture (TDI)	≥98% (GC)	Can be used for polyurethane material synthesis, coating crosslinking, and mechanical-property research
Polyurethane raw material	101-68-8	M106783	4,4′-Methylenebis(phenyl isocyanate) (MDI)	≥98%	Can be used for research on polyurethane coatings, elastomeric materials, and high-strength crosslinked systems

Table 4 Weather-Resistant Pigments, Barrier Fillers, and Coating-Film Reinforcement Materials

Category	CAS No.	Aladdin Item No.	Name	Specification or Purity	Product Features and Applications
Weather-resistant anticorrosive pigment	1309-37-1	I431738	Iron(III) oxide	Nanopowder, <50 nm particle size (BET)	Can be used for anticorrosive coating coloration, dispersion of weather-resistant pigments, and comparative research on outdoor chalking and gloss loss
Flake barrier filler	12001-26-2	P580753	Phlogopite	Industrial grade, 200 mesh	Can be used in barrier anticorrosive coatings, research on extending media migration pathways, and evaluation of coating-film cracking risk
High-density filler	7727-43-7	B112376	Barium sulfate	PrimorTrace™, ≥99.99% metals basis	Can be used for anticorrosive coating filling, film densification, media resistance, and high-cleanliness formulation research
Weather-resistant white pigment	13463-67-7	T754396	Fumed nano titanium dioxide	≥99.9% metals basis, ≤50 nm	Can be used in weather-resistant topcoats, white protective coatings, UV shielding, and research on chalking and gloss loss
Nanostructured filler	7631-86-9	S104596	Nano silicon dioxide	≥99.5% metals basis, 30 nm	Can be used for coating-film densification, abrasion-resistance enhancement, matting, anti-sagging, and media-resistance research

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

References

[1] Covestro. Chlorinated Rubber for Corrosion Protection Coatings and Contact Adhesives. Covestro Solutions Center.

[2] Benjamin Moore. INSL-X® Chlorinated Rubber Pool Coating Technical Data Sheet.

[3] Jotun. Technical Data Sheet: Chlorinated Rubber Based Coating. Jotun.

[4] Covestro. Pergut® S 40 Product Information. Covestro Solutions Center.

[5] LOOK Chemical. A Brief Discussion on Chlorinated Rubber Coatings.

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