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    • Styrene Acrylic Emulsion CAS 25085-34-1

    Styrene Acrylic Emulsion CAS 25085-34-1

    Styrene acrylic emulsion, a water-based styrene-acrylic copolymer dispersion, CAS 25085-34-1, is supplied as a milky-white to translucent polymer binder for coating, construction, adhesive, and surface-treatment applications. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

    • 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.
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    Product Description

    Styrene Acrylic Emulsion CAS 25085-34-1 is a water-based styrene-acrylic copolymer dispersion with the repeat-unit formula (C8H8·C3H4O2)x.

    Synonyms: Acrylic acid-styrene copolymer; 2-Propenoic acid, polymer with ethenylbenzene.

    CAS: 25085-34-1.

    Molecular formula: (C8H8·C3H4O2)x.

    It is a milky white to translucent liquid with solid content typically about 49-50% and pH about 7.0-9.0 at 25 °C.

    Viscosity is typically about 3000-6000 mPa·s (or cps), and minimum film-forming temperature about 26-30 °C for certain coating grades.

    It is dispersible in water and designed for water-based formulation systems, with residual monomer controlled to internal release standards.

    As a polymer-family CAS, one number covers multiple commercial grades differing in solids, viscosity, pH, particle size, MFFT, Tg, hardness, and flexibility.

    In architectural coatings it is a water-based binder for interior and exterior systems with balanced film formation, adhesion, and resistance.

    In waterproofing and cement modification it improves binding performance and water resistance in polymer-modified mortars and slurries.

    In adhesives and sealants it is a binder phase supporting cohesion, substrate bonding, and film integrity.

    In paper and surface treatment it is used where a water-based polymer binder provides surface strength and film continuity.

    Store in tightly closed original containers in a cool, dry, well-ventilated area; protect from freezing, prolonged high heat, and direct sunlight.

    Wear chemical-resistant gloves, protective clothing, and safety goggles; evaluate local ventilation and respiratory protection if mist may be generated.

    Use clean transfer equipment and avoid mixing with strong acids, strong oxidants, or incompatible metal salts unless stability is confirmed.

    Every batch is checked for appearance, solid content, pH, viscosity, mechanical/dilution stability, film-forming performance, and, where applicable, residual monomer and particle size.

    Confirm appearance, solid content, pH, viscosity, MFFT, residual monomer, packaging, and grade as required.

    The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

    For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

    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.

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