Graft copolymers comprising acrylonitrile and cellulose derivatives

Claim 1

A RESINOUS GRAFT COPOLYMER OF (1) FROM 50-95% BY WEIGHT OF MONOMERIC MATERIAL CONSISTING OF FROM 75-98% BY WEIGHT OF ACRYLONITRILE AND FROM 25-2% BY WEIGHT OF AT LEAST ONE OTHER ETHENOID COMONOMER SELECTED FROM THE GROUP CONSISTING OF VINYL AND ISOPROPENYL ESTERS OF 2,2-DIMETHYLAKANOIC ACIDS OF FROM 5-16 CARBON ATOMS, 2,2-DIMETHYLAKYL ACRYLATES AND METHACRYLATES, DI-2,2-DIMETHYLALKYL MALEATES, FURMARATES, ITACONATES, CITRACONATES, N-2,2-DIMETHYLALKYL ACRYLAMIDES AND METHACRYLAMIDES, DI-N-2,2-DIMETHYLALKYL MALEAMIDES, FURARAMIDES, ITACONAMIDES AND CITRACONAMIDES, 2,2-DIMETHYLALKYL VINYL ETHERS AND 2,2-DIMETHYLALKYL VINYL ETHERS, WHEREIN IN EACH INSTANCE THE SAID 2,2-DIEMTHYLAKYL GROUP CONTAINS FROM 5-10 CARBN ATOS, AND (2) FROM 50-5% BY WEIGHT OF A COMPOUND COMPOSED OF CELLULOSE HAVING FROM 10-70% OF THE HYDROXYL GROUPS OF THE CELLULOSE IN FREE FORM AND HAVING THE HYDROGEN OF THE REAMINDER OF THE HYDROXYL GROUPS REPLACED BY RADICALS FROM THE GROUP CONSISTING OF ALKYL GROUPS OF FROM 1-4 CARBON ATOMS, CARBOXYALKYL GROUPS OF FROM 2-5 CARBON ATOMS AND SATURATED ALIPHATIC ACYL GROUPS OF FROM 2-5 CARBON ATOMS.