vinylacrylate

Vinyl acrylate, also known as the vinyl ester of acrylic acid, is an organic compound with the formula C5H6O2. Its structure is CH2=CH-CO-O-CH=CH2, reflecting a vinyl ester of acrylic acid. It is used primarily as a monomer in polymer chemistry to produce poly(vinyl acrylate) and various copolymers.

Physically, vinyl acrylate is typically a colorless, low-viscosity liquid at room temperature. It is flammable and has a characteristic acrylate odor. In polymerization, it behaves as a reactive monomer that readily forms polymers through radical initiation, often with inhibitors added to control the rate of polymerization during handling and storage.

Polymerization and applications: When polymerized, vinyl acrylate yields poly(vinyl acrylate), which bears pendant ester groups that influence adhesion, solubility, and mechanical properties. The monomer is also used as a comonomer with other acrylates or vinyl esters to tailor properties for coatings, paints, adhesives, sealants, and specialty resins. It can contribute to toughness, chemical resistance, and adhesion in formulated products and can be incorporated into hydrogels for certain applications.

Production methods: Commercial vinyl acrylate is typically prepared by esterification of acrylic acid with vinyl alcohol, though vinyl alcohol is unstable and is often generated in situ. An alternative route uses transesterification of vinyl acetate with acrylic acid in the presence of catalysts. Handling requires protective measures to minimize uncontrolled polymerization and to protect against irritation or exposure.

Safety: Vinyl acrylate is a reactive monomer that can irritate skin and eyes and may pose inhalation hazards. It should be stored with polymerization inhibitors and kept away from heat, sparks, and oxidizers. Adequate ventilation and proper containment are recommended during use.