Small particle size latex based on vinyl acetate polymers

Details Small particle size latex based on vinyl acetate polymers Small particle size latex based on vinyl acetate polymers

1986-04-17

1989-03-14

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524814, 524817, 526287, C08L 4300

Patent

active

048125105

ABSTRACT:
Colloid-free vinyl acetate latexes having an average particle size between 400 .ANG. to 700 .ANG. at a concentration of 30 to 50% by weight have been prepared. The latexes comprise 60 to 100 weight parts of vinyl acetate monomer with about 40 to 0 weight parts of one or more ethylenically unsaturated comonomers such that the glass transition temperature of the polymers are between -10.degree. and 40.degree. C. The latexes are prepared by emulsion polymerization in aqueous medium, in the presence of 0.05 to 20 parts of an anionic surfactant, e.g., alpha-olefin surfactant, and 0.05 to 15 parts of an ionic comonomer, e.g., sodium 2-acrylamido-2-methylpropane sulfonate (Na-AMPS). The interior wall primer-sealer derived from these fine particle size vinyl acetate latexes showed excellent enamel hold-out properties and paint stability. The latexes may also be applied aas binders in the manufacture of other paints, adhesives, papers, and as textile sizes.

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patent: 4357442 (1982-11-01), Shah

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