METHOD OF BLENDING ETHYLENE VINYLACETATE COPOLYMERS AND POLYDIORGANOSILOXANE GUMS AND THE BLENDS MADE BY THE METHOD

摘要

ABSTRACT OF THE DISCLOSUREA processable, stable, homogeneous blend is obtained bymechanically mixing a polydiorganosiloxane gum containing 0.2 toless than 1.5 mol percent silicon atoms having vinyl or allylgroups with an ethylene vinylacetate copolymer containing 8 to 35weight percent copolymerized vinylacetate. The polymers are mixedat a shear rate greater than 10 sec-1, at a temperature between170°C. and 235°C. and for a period of time sufficient to obtain atleast 10 weight percent of the total blend of material which isinsoluble in refluxing xylene.