IMPROVED MASS POLYMERIZED RUBBER-MODIFIED MONOVINYLIDENE AROMATIC COPOLYMER COMPOSITIONS
Publication Date: 2003-Jan-13
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A high heat, high impact rubber modified polymer has been developed having a continuous matrix phase comprising a monovinylidene aromatic monomer, an ethylenically unsaturated nitrile monomer and a N-substituted maleimide monomer; with a rubber formed as discrete rubber particles as described in U.S. 6,380,304. The mass polymerized polymer compositions are an improvement over the high heat resins described in U.S. 5,412,036 and are especially useful in the preparation of molded objects where a balance of high surface gloss, high heat and good impact resistance is desired.