Method of blending ethylene vinylacetate copolymers and polydior

Details Method of blending ethylene vinylacetate copolymers and polydior Method of blending ethylene vinylacetate copolymers and polydior

1979-01-31

1981-02-24

Briggs, Sr., Wilbert J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

428447, 428450, 428463, C08L 8306, C08L 2308

Patent

active

042529158

ABSTRACT:
A processable, stable, homogeneous blend is obtained by mechanically mixing a polydiorganosiloxane gum containing 0.2 to less than 1.5 mol percent silicon atoms having vinyl or allyl groups with an ethylene vinylacetate copolymer containing 8 to 35 weight percent copolymerized vinylacetate. The polymers are mixed at a shear rate greater than 10 sec.sup.-1, at a temperature between 170.degree. C. and 235.degree. C. and for a period of time sufficient to obtain at least 10 weight percent of the total blend of material which is insoluble in refluxing xylene.

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patent: 3865897 (1975-02-01), Falender et al.
patent: 3975455 (1976-08-01), Falender et al.
patent: 3979356 (1976-09-01), Walters

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