What is Styrene-acrylic CAS 25085-34-1?

Styrene-acrylic is a water-based copolymer dispersion made by polymerizing styrene with acrylic monomers. CAS 25085-34-1 identifies this polymer family, often represented as (C8H8.C3H4O2)x, and it is supplied mainly as an anionic emulsion for coating and adhesive formulations.

Which applications commonly use styrene-acrylic emulsion?

It is used as a binder in interior and exterior architectural paints, waterproof coatings, polymer-modified cement mortar, adhesives, paper coatings, textile printing, and water-based inks. The styrene contributes hardness and water resistance while the acrylic component improves film formation, adhesion, and flexibility.

Why is styrene-acrylic emulsion suitable for cementitious systems?

This polymer type generally has good calcium-ion stability, allowing it to remain dispersible in alkaline cement environments. It improves adhesion to mineral substrates, flexural behavior, and water resistance in polymer-modified mortar, waterproof slurry, and related construction products.

How should the right styrene-acrylic grade be selected?

Grades differ in solids content, pH, viscosity, glass transition temperature, and minimum film-forming temperature. A harder, higher-Tg grade may improve block resistance and early water resistance, while a softer grade improves low-temperature film formation and flexibility, so the choice should match the substrate, application method, and cure conditions.

Styrene-acrylic CAS 25085-34-1

Styrene-acrylic emulsion is a versatile water-based copolymer dispersion categorized under Construction and coating chemicals, engineered primarily as a high-efficiency binding agent for industrial surface treatments. This aqueous polymer, often identified as a styrene acrylate copolymer, functions through a coalescing mechanism to form a durable, water-resistant film characterized by excellent alkali resistance and UV stability. Within the chemical production chain, it is utilized as a fundamental raw material for formulating exterior wall paints, high-elasticity waterproof coatings, and adhesive interlayers where superior mechanical strength and adhesion to mineral substrates are required. The material’s chemical structure provides a balanced ratio of hard styrene monomers and soft acrylate monomers, ensuring optimal flexibility and weatherability in harsh environments. We provide this essential industrial ingredient with competitive factory pricing to support global infrastructure and manufacturing projects, offering customized specifications regarding solid content and glass transition temperature (Tg). To facilitate seamless international logistics and compliance, all shipments are accompanied by MSDS, TDS, COA documentation, ensuring reliable bulk supply for large-scale coating production lines.

CAS: 25085-34-1
Synonyms: Styrene Acrylate Copolymer, Styrene-Acrylic Resin Dispersion, Benzene-Acrylic Emulsion, Polymerized Styrene-Acrylic Binder, Styrene Acrylic Latex
Einecs: 607-531-3
Molecular Formula: (C8H8.C3H4O2)x
Grade: Coating / Industrial Grade
Package: 200kg/drum or 1000kg/IBC drum

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Product Description

Technical Data

Physicochemical Properties	Specification (Typical Data)
Appearance	Milky white liquid with slight blue tint
Solid Content	48.0% ± 1.0%
pH Value	7.0 – 9.0
Viscosity (Brookfield, 25°C)	500 – 2000 mPa·s
Glass Transition Temp (Tg)	Approx. 20°C
Minimum Film Forming Temp (MFFT)	≤ 18°C
Ionicity	Anionic

Applications

Architectural Coatings: Primary binder for interior and exterior latex paints, providing scrub resistance and color retention.
Construction Waterproofing: Used in the formulation of JS waterproof coatings and flexible cementitious mortars.
Paper & Textile Processing: Applied as a coating pigment binder and sizing agent to improve surface strength and water resistance.
Industrial Adhesives: Utilized in the production of wood glues and pressure-sensitive adhesives for industrial packaging.

For water-based coating or adhesive formulations using a styrene-butadiene binder, Styrene Butadiene Latex (SBR Emulsion) is a separate polymer dispersion.

Storage & Safety

Storage: Keep in a pressurized-free, airtight container. Store in a shaded, dry area at temperatures between 5°C and 35°C. Prevent freezing, as the emulsion is non-recoverable after de-emulsification.
Safety (PPE): Use standard industrial PPE, including safety glasses and nitrile gloves. Ensure localized exhaust ventilation during high-speed stirring or blending to avoid inhalation of residual monomers.

Quality Assurance

Our manufacturing process for Styrene-acrylic dispersions employs advanced emulsion polymerization technology with automated temperature control to ensure precise molecular weight distribution. Quality control protocols include particle size analysis, residual monomer testing, and long-term mechanical stability checks. We adhere to stringent industrial standards to ensure that every IBC delivery maintains consistent rheological properties for the end-user’s formulation.

FAQ - Technical & Supply Chain

Q:
What is Styrene-acrylic CAS 25085-34-1?

A: Styrene-acrylic is a water-based copolymer dispersion made by polymerizing styrene with acrylic monomers. CAS 25085-34-1 identifies this polymer family, often represented as (C8H8.C3H4O2)x, and it is supplied mainly as an anionic emulsion for coating and adhesive formulations.
Q:
Which applications commonly use styrene-acrylic emulsion?

A: It is used as a binder in interior and exterior architectural paints, waterproof coatings, polymer-modified cement mortar, adhesives, paper coatings, textile printing, and water-based inks. The styrene contributes hardness and water resistance while the acrylic component improves film formation, adhesion, and flexibility.
Q:
Why is styrene-acrylic emulsion suitable for cementitious systems?

A: This polymer type generally has good calcium-ion stability, allowing it to remain dispersible in alkaline cement environments. It improves adhesion to mineral substrates, flexural behavior, and water resistance in polymer-modified mortar, waterproof slurry, and related construction products.
Q:
How should the right styrene-acrylic grade be selected?

A: Grades differ in solids content, pH, viscosity, glass transition temperature, and minimum film-forming temperature. A harder, higher-Tg grade may improve block resistance and early water resistance, while a softer grade improves low-temperature film formation and flexibility, so the choice should match the substrate, application method, and cure conditions.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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