Compatibilization of thermoplastic copolymers
AssigneeNational Distillers and Chemical Corporation
InventorErvin G. Pritchett
Life of this patent
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Abstract
Compatibilized blends and composites of (a) a thermoplastic copolymer of an alkenyl aromatic monomer and an alkenyl nitrile monomer together with (b) a thermoplastic copolymer of ethylene and a vinyl ester are formed by mixing the copolymers in the presence of an acid compatibilization agent prior to, concurrently with, or subsequent to, mild cross-linking of copolymer (b).
Claims29
A method for the compatibilization of materials normally incompatible with each other which comprises mixing (a) a thermoplastic copolymer of an alkenyl aromatic monomer and an alkenyl nitrile monomer, (b) a thermoplastic copolymer of ethylene and a vinyl ester having a melt flow rate less than about one measured according to ASTM D-1238, Condition E, in the presence of a compatibilization effective amount of (c) an acid compatibilization agent prior to, concurrently with, or subsequent to, mild-crosslinking of copolymer (b) for a period of time sufficient to achieve compatibilization of copolymer (a) and (b).
A method for the compatibilization of materials normally incompatible with each other which comprises mixing (a)a thermoplastic copolymer of an alkenyl aromatic monomer and an alkenyl nitrile monomer and (b) a thermoplastic copolymer of ethylene and a vinyl ester having a melt flow rate less than about one, measured according to ASTM D-1328, Condition E, in the presence of a compatibilization effective amount of (c) an acid compatibilization agent and a crosslink effective amount of (d) an ethylene-vinyl ester crosslinking agent for a period of time sufficient to achieve compatibilization of copolymers (a) and (b).
Dependencies are inferred from the claim text.