Composition comprising derivatives of cross-linked carboxylic acid anhydride polymers and method of preparing same

Claim 1

A COMPOSITION COMPRISING A MEMBER SELECTED FROM THE CLASS CONSISTING OF PARTIAL ESTER-PARTIAL AMIDE, HAVING FROM 1 TO 18 CARBON ATOMS IN THE ESTER GROUP, PARTIAL AMIDE-PARTIAL AMINE SALTS HAVING FROM 1 TO 18 CARBON ATOMS IN THE AMIDE GROUP AND PARTIAL AMIDE-PARTIAL AMMONIUM SALT DERIVATIVES OF AN INTERPOLYMER OF A MONOMERIC MIXTURE OF FROM 20% TO 62.8% BY WEILGHT OF (1) AN ALPHA-BETA OLEFINICALLY UNSATURATED DICARBOXYLIC ACID ANHYDRIDE, (2) FROM 30.4 TO 80% BY WEIGHT OF AT LEAST ONE OTHER MONOMER COPOLYMERIZABLE WILTH SAID ANHYDRIDE SELECTED FROM THE CLASS CONSISTING OF VINYL ALKYL ETHERS HAVING FROM 3 TO 1/ CARBON ATOMS, METHYL ACRYLATE, ACRYLIC ACID AND VINLY ACETATE AND (3) A CROSS-LINKING AGENT SELECTED FROM THE CLASS CONSISTING OF (A) FROM 01 TO 10% BY WEIGHT OF THE COMBINED WEIGHT OF MONOMERS DEFINED UNDER (1) AND (2) OF POLYALLYL SUCROSE, POLYALLYL SORBITOL, POLYALLYL PENTAERYTHRITOL, POLYALLYL INOSITOL, POLYALLYL RAFFINOSE, POLYALLYL SULFONES, TRIMETHACRYLYL TRAIZINE, TRIACRYLYL TRIAZINE, TRIALLYL CYANURATE, METHYLENEBIS-ACRYLAMIDE, M ETHYLENE-BIS-METHACRYLAMIDE, N,N''-DIALLYLACRYLAMIDE, POLYBUTADIENE HAVING A PLURALITY OF SIDE CH2=CH GROUPS, (B) FROM 6 TO 30% OF MYRCENE AND SQUALENE, AND (C) FROM 4 TO 20% OF A LIQUID POLYESTER OF MALEIC ANHYDRIDE AND A GLYCOL DISSOLVED ILN STYRENE AND A LIQUID POLYESTER OF MALEIC ANHYDRIDE, PHTHALIC ANHYDRIDE AND A CLYCOL, SAID DERIVATIVES HAVING SUBSTANTIALLY NOT MORE THAN ONE OF SAID DERIVATIVE LINKAGES FOR EACH ANHYDRIDE GROUP.