Graft copolymers of an alkenyl-substituted aromatic compound, and unsaturated ester,and a copolymer of an alkenyl-substituted aromatic compound and an unsaturated ketone

Claim 1

A GRAFT COPOLYMER COMPOSITION COMPRISING THE PRODUCT OF POLYMERIZATION OF (1) AN ALKENYL-SUBSTITUTED AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, ALPHA-ALKYLSTYRENES, AND THE MONO- AND DICHLOROAND MONO- AND POLYALKYL-SUBSTITUTED STYRENES WHEREIN THE SUBSTITUENTS ARE ATTACHED TO RING CARBON ATOMS, SAID SUBSTITUTED STYRENES CONTAINING UP TO 12 CARBON ATOMS, (2) AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID ESTER CONTAINING UP TO 12 CARBON ATOMS AND SELECTED FROM THE GROUP CONSISTING OF (A) AN ESTER OF A SATURATED MONOHYDRIC ALCOHOL AND AN ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID AND (B) AN ESTER OF A SATURATED MONOHYDRIC ALCOHOL AND AN ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, AND (3) A PREFORMED COPOLYMER OF (1) AND AN ETHYLENICALLY UNSATURATED KETONE SELECTED FROM THE GROUP CONSISTING OF ALKYL, ALKENYL KETONES, DIALKENYL KETONES AND CYCLOALKYL ALKENYL KETONES.