Styrene Acrylic Emulsion is a water-based copolymer dispersion used in the Construction and coating chemicals sector as a film-forming binder for coating, adhesive, and cement-modified formulation systems. In industrial documentation, this material is also referred to as styrene-acrylic emulsion, styrene acrylic copolymer emulsion, acrylic acid-styrene copolymer, and styrene-acrylate latex. Identified by CAS 25085-34-1, it functions through polymer particle coalescence and film formation to improve adhesion, water resistance, alkali resistance, and formulation stability in water-based industrial systems. This product is generally supplied with competitive factory pricing, customized specifications, supporting documents including MSDS, TDS, COA, and bulk supply options.
Styrene Acrylic Emulsion CAS 25085-34-1
- CAS: 25085-34-1
- Synonyms: Acrylic acid-styrene copolymer / 2-Propenoic acid, polymer with ethenylbenzene
- Molecular Formula: (C8H8·C3H4O2)x
- Grade: Industrial grade
- Package: 25 kg drum, 50 kg drum, 200 kg plastic drum, or IBC, depending on grade and supply format.
Product Description
Physicochemical Properties
Representative commercial specification range for water-based styrene-acrylic emulsion grades; adjust to your actual TDS before publishing.
| Item | Typical Commercial Range / Description |
|---|---|
| Appearance | Milky white to translucent liquid |
| Polymer Type | Water-based styrene-acrylic copolymer emulsion |
| Solid Content | Typically about 49–50% |
| pH (25 °C) | Typically 7.0–9.0 |
| Viscosity (25 °C) | Typically 3000–6000 mPa·s or cps, depending on grade |
| Minimum Film Forming Temperature | Typically 26–30 °C for certain coating grades |
| Solubility / Dispersion | Dispersible in water as supplied; designed for water-based formulation systems |
| Residual Monomer | Controlled according to internal release standard; confirm with supplier COA |
Applications
1. Architectural Coatings
Used as a water-based binder in interior and exterior coating systems where film formation, adhesion, and resistance balance are important. Public supplier descriptions specifically cite architectural binder coatings as a common application.
2. Waterproofing and Cement Modification
Applied in polymer-modified cement mortar, waterproof slurry, and related construction mixtures to improve binding performance and water resistance within mineral systems.
3. Adhesives and Sealants
Used in selected water-based adhesive and sealing mixtures as a binder phase to support cohesion, substrate bonding, and film integrity.
4. Paper and Surface Treatment Systems
Can be used in coating or treatment formulations where a water-based polymer binder is required for surface strength and film continuity. This should still be matched to the exact grade and end-use regulatory need.
For water-based coating or adhesive work that calls for a styrene-butadiene binder rather than an acrylic-modified emulsion, Styrene Butadiene Latex (SBR Emulsion) is a separate polymer dispersion.
Storage & Safety
Store Styrene Acrylic Emulsion in tightly closed original containers in a cool, dry, and well-ventilated area. Protect the product from freezing, prolonged high heat, and direct sunlight, because emulsion stability can be affected by temperature extremes. Use clean transfer equipment to avoid microbial contamination or coagulation caused by incompatible additives. During handling, operators should wear standard industrial PPE such as chemical-resistant gloves, protective clothing, and safety goggles. If the material is processed by spraying or under conditions that may generate mist, local ventilation and respiratory protection should be evaluated according to workplace risk assessment. Avoid mixing with strong acids, strong oxidants, or incompatible metal salts unless formulation testing has confirmed stability. These precautions are consistent with the product’s use as a water-based industrial polymer dispersion and should be finalized against the supplier SDS for the exact grade.
Quality Assurance
For this product category, a credible quality assurance section should focus on batch-to-batch emulsion control rather than on pharmaceutical-style claims. A typical factory release program for styrene-acrylic emulsion may include appearance, solid content, pH, viscosity, mechanical stability, dilution stability, and film-forming performance. For more demanding coating or construction grades, routine QC may also monitor residual monomer, particle-size distribution, freeze-thaw stability, calcium-ion stability, and dry-film performance after application testing. Instrumental methods can include solids determination, Brookfield or equivalent viscosity testing, pH measurement, particle-size analysis, and residual monomer checks by chromatographic methods where applicable. GMP should not be claimed unless the actual plant is certified to that standard for the relevant product line.
FAQ - Technical & Supply Chain
-
Q:
What is Styrene Acrylic Emulsion CAS 25085-34-1?
A: It is a water-based styrene-acrylic copolymer dispersion used mainly as a polymeric binder. CAS 25085-34-1 identifies the polymer family, which is also described as 2-propenoic acid polymer with ethenylbenzene. -
Q:
Why can one CAS number cover different commercial grades?
A: The CAS number identifies the styrene-acrylic polymer family, not a single grade. Commercial emulsions can differ in solids content, viscosity, pH, particle size, minimum film-forming temperature, glass transition temperature, hardness, and flexibility. -
Q:
What are the main coating and construction applications?
A: Styrene Acrylic Emulsion is used in interior and exterior architectural coatings, waterproofing membranes, polymer-modified cement mortar, and waterproof slurry. It provides film formation, adhesion, binding strength, and water resistance in these water-based systems. -
Q:
Can it also be used in adhesives and surface treatments?
A: Yes, selected grades are used in water-based adhesives, sealants, printing inks, and paper or surface treatment formulations. Grade selection should be matched to the required cohesion, substrate bonding, film hardness, and compatibility. -
Q:
What are typical specification ranges for industrial grade?
A: Typical industrial grades are milky white to translucent liquids with solid content commonly around 40-55%, pH about 7.0-9.0, and Brookfield viscosity from roughly 500 to 6000 mPa·s depending on the grade. MFFT and Tg vary by copolymer design and intended film performance. -
Q:
How should Styrene Acrylic Emulsion CAS 25085-34-1 be stored?
A: Store it in tightly closed containers in a cool, dry, well-ventilated area. Protect the emulsion from freezing, prolonged high heat, direct sunlight, and incompatible additives that could cause coagulation or microbial contamination.
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.
