Finely-divided vinyl chloride-ethylene copolymers stabilized by

Details Finely-divided vinyl chloride-ethylene copolymers stabilized by Finely-divided vinyl chloride-ethylene copolymers stabilized by

1988-01-27

1992-06-23

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...

523223, C08K 1102

Patent

active

051244012

ABSTRACT:
A finely-divided, monomodal protective-colloid stabilized aqueous dispersion of a copolymer of at least 75% by weight of units of vinyl chloride and ethylene and optionally copolymerized with up to 25% by weight of units of additional monomers unsaturated at the ethylene bond and having a solids content of 45 to 70% by weight, characterized in that the dispersions are not partially flocculated, the polymer has a mean particle size of 150 to 500 nm measured as mean weight in a disc centrifuge and a polydispersion index of not more than 1.8 and less than 50% of the polymer particles are larger than 1,000 nm and a process for the preparation thereof using a single step radical polymerization of vinyl chloride, ethylene and optionally additional monomers such as vinyl esters useful as dispersion powders, adhesives, binders and concrete additives.

REFERENCES:
patent: 3423351 (1969-01-01), Pierce
patent: 3830761 (1974-08-01), Lenney
patent: 4226752 (1980-10-01), Erickson

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