Laminate adhesive comprising a protein and a quadricomponent interpolymer and process for preparing same

Claim 1

AN ADHESIVE COMPRISING AN AQUEOUS DISPERSION OF 100 PARTS BY WEIGHT OF A PROTEIN OF THE GROUP CONSISTING OF CASEIN, SOYBEAN, BLOOD ALBUMIN, ZEIN, PEANUT PROTEIN, AND MIXTURES THEREOF AND 1-190 PARTS BY WEIGHT OF A QUANDRICOMPONENT INTERPOLYMER OF (1) 35-60 PARTS BY WEIGHT OF AN UNSATURATED ESTER OF THE FROUP CONSISTING OF ALKYL ACRYLATES AND ALKYL METHACRYLATES WHEREIN THE ALKYL RADICAL CONTAINS 5-20 CARBON ATOMS AND HAS 5-14 CARBON ATOMS IN THE LONGEST CONTINUOUS CHAIN THEROF, (2) 3-10 PARTS BY WEIGHT OF AN UNSATURATED NITRILE OF THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE, (3) 2-5 PARTS BY WEIGHT OF AN UNSATURATED MONOCARBOXYLIC ACID OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, CINNAMIC ACID, ATROPIC ACID, AND CROTONIC ACID, AND (4) CORRESPONDINGLY, 60-25 PARTS BY WEIGHT OF A MONOVINYLIDENE AROMATIC HYDROCARBON OF THE GROUP CONSISTING OF SYRENE, ALKYL-SUBSTITUTED STYRENE, HALOGEN-SUB SITUTATED STYRENE, VINYL NAPTHALENE, AND MIXTURES THEREOF, SAID INTERPOLYMER HAVING BEEN PREPARED BY PARTIALLY POLYMERIZING ALL OF THE UNSATURATED NITRILE COMPONENT WITH FROM 1.5 TO 3 TIMES ITS WEIGHT OF MONOVINYLIDENE AROMATIC HYDROCARBON COMPONENT AND COMPLETING THE INTERPOLYMERIZATION REACTION AFTER ADDING ALL OF THE REMAINING COMPONENTS.