Polyvinyl Acetate Emulsion
Polyvinyl Acetate Emulsion (PVA, CAS 9003-20-7) is a versatile thermoplastic polymer emulsion widely used as a binder and adhesive.
Description
Polyvinyl Acetate (PVA) Emulsion, with the chemical formula (C4H6O2)n, is a synthetic polymer formed by the emulsion polymerization of vinyl acetate monomer. This product is presented as a white, viscous liquid dispersion of fine polymer particles in water, stabilized by various emulsifying agents and protective colloids. The polymerization process is carefully controlled to achieve specific molecular weights and particle sizes, influencing the final rheological properties and film formation characteristics. PVA emulsions are thermoplastic, meaning they can be softened by heat and re-solidified upon cooling, making them suitable for a wide range of applications. Key properties include excellent adhesion to porous substrates such as wood, paper, textiles, and concrete, good film-forming capabilities, and optical clarity upon drying. The dried film exhibits moderate flexibility, good tensile strength, and resistance to oils and grease, though it is susceptible to softening or re-emulsification in the presence of water. The product's non-toxic nature, low VOC content, and ease of use contribute to its widespread adoption across numerous industries.
Applications
PVA emulsions are critically utilized across diverse industrial sectors. In the construction industry, they serve as effective binders for mortars, concrete additives, and primers, enhancing adhesion, flexibility, and waterproofing. The paint and coatings sector relies on PVA emulsions as essential binders for water-based paints, primers, and sealers due to their excellent film formation and adhesion properties. In the woodworking industry, they are premium glues for furniture assembly, lamination, and general wood bonding. The paper and packaging industry employs PVA for paper coating, glues for cartons, envelopes, and bookbinding, offering strong and flexible bonds. Additionally, they are used in textiles as sizing agents to improve fabric strength and handle, and in craft and DIY applications as general-purpose adhesives.
Storage & Handling
Store in tightly closed containers in a cool, dry, well-ventilated area, away from direct sunlight and freezing temperatures. Product should be handled with appropriate personal protective equipment. Avoid prolonged skin contact and inhalation of mist.
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