Small particle size non-surface active protective...

Details Small particle size non-surface active protective... Small particle size non-surface active protective...

C - Chemistry, Metallurgy

08

L

400/1355, 400/92

C08L 33/06 (2006.01) C08F 20/12 (2006.01) C08L 1/02 (2006.01)

Patent

CA 1324455

SMALL PARTICLE SIZE NON-SURFACE ACTIVE PROTECTIVE COLLOID-STABILIZED LATEXES DERIVED FROM MONOMERS OF HIGH AQUEOUS PHASE GRAFTING TENDENCIES Abstract of Disclosure Disclosed are aqueous polyacrylate dispersions of acrylic or methacrylic polymers, having improved rheological and stability characteristics, prepared by the aqueous poly- merization of acrylic esters, methacrylic esters or their mixtures in the presence of a from about 0.05 to about 5% of a non-surface active protective colloid and a free-radical polymerization initiator that comprises a combination of from about 0.01 to about 1% of an azo initiator or an organo- soluble, water-insoluble peroxide initiator and between 0.01% to about 0.05% of a water-soluble peroxide initiator, by weight of total monomer content. The resultant aqueous poly- acrylate dispersions have a particle size less than about 1000 nm and are useful in the manufacture of latex paints, binders for nonwoven materials, water-based inks, paper coat- ings and water-borne adhesives, such as pressure-sensitive adhesives.

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