Adhesive compositions comprising carboxyl polymers and polyepoxides

Claim 2

A MEDIFIED POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT IN EXCESS OF 10,000 CHARACTERIZED AS A LINEAR-VINYL POLYMER HAVING ON ITS SIDE-CHAIN ACCEPTORS 0.5 TO 6.0% BY WEIGHT OF THE POLYMER OF AN AROMATIC POLYCARBOXYLIC ACID HAVING AT LEAST TWO UNREACTED FREE CARBOXYL GROUPS; SAID LINEAR-VINYL POLYMER CONTAINING AT LEAST 1% BY WEIGHT OF ITS AVERAGE MOLECULAR WEIGHT OF A SIDE-CHAIN ACCEPTOR ATTACHED DIRECTLY TO THE CARBON ATOMS IN THE CHAIN FOR REACTION WITH THE CARBOXYL GROUP OF AN AROMATIC POLYCARBOXYLIC ACID ANHYDRIDE; SAID ACCEPTOR SELECTED FROM THE GROUP CONSISTING OF HYDROXYL GROUPS, MERCAPTANS, PRIMARY AND SECONDARY AMINE GROUPS.

Claim 3

A THERMOSET-FORMING POLYMERIC COMPOSTION COMPRISING A MODIFIED POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT IN EXCESS OF 10,000 AND APPROXIMATELY 20-50 PARTS-BY-WEIGHT FOR EACH 100 PARTS-BY-WEIGHT OF SAID MODIFIED POLYMER OF AN EPOXY-CONTAINING CROSS-LINKING AGENT SELECTED FROM THE GROUP CONSISTING OF A DIGLYCIDYL ETHER OF AN ALIPHATIC GLYCOL, A DIGLYCIDYL ETHER OF P.P''-ISOPROPYLIDENE BISPHENOL AND AN EPOXIDIZED UNSATURATED VEGETABLE OIL; SAID MODIFIED POLYMER CHARACTERIZED AS A LINEARVINYL POLYMER HAVING AS ITS SIDE-CHAINS 0.5 TO 6.0% BY WEIGHT OF AN AROMATIC POLYCARBOXYLIC ACID WHEREIN AT LEAST TWO CARBOXYL GROUPS OF THE ACID REMAIN FREE FOR REACTION WITH SAID CROSS-LINKING AGENT; AND AT LEAST 1% BY WEIGHT OF SAID LINEAR-VINYL POLYMER''S AVERAGE MOLECULAR WEIGHT CONSISTS OF SIDE-CHAIN ACCEPTORS ATTACHED DIRECTLY TO THE CARBON ATOMS IN THE CHAIN AND SELECTED FROM THE GROUP CONSISTING OF HYDROXYL GROUPS, MERCAPTANS, PRIMARY AND SECONDARY AMINE GROUPS FOR REACTION WITH THE AROMATIC ACID ANHYDRIDE WHICH IS THE PRECURSOR OF SAID SIDE-CHAINS.

Claim 4

A THERMOSET-FORMING POLYMERIC COMPOSTION COMPRISING A MODIFIED POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT IN EXCESS OF 10,000 AND APPROXIMATELY 20-50 PARTS-BY-WEIGHT FOR EACH 100 PARTS-BY-WEIGHT OF SAID MODIFIED POLYMER OF AN EPOXY-CONTAINING CROSS-LINKING AGENT SELECTED FROM THE GROUP CONSISTING OF A DIGLYCIDYL ETHER OF AN ALIPHATIC GLYCOL, A DIGLYCIDYL ETHER OF P.P''-ISOPROPYLIDENE BISPHENOL AND AN EPOXIDIZED UNSATURATED VEGETABLE OIL; SAID MODIFIED POLYMER CHARACTERIZED AS A LINEARVINYL POLYMER HAVING AS ITS SIDE-CHAINS 0.5 TO 6.0% BY WEIGHT OF AN AROMATIC POLYCARBOXYLIC ACID WHEREIN AT LEAST TWO CARBOXYL GROUPS OF THE ACID REMAIN FREE FOR REACTION WITH SAID CROSS-LINKING AGENT; AND AT LEAST 1% BY WEIGHT OF SAID LINEAR-VINYL POLYMER''S AVERAGE MOLECULAR WEIGHT CONSISTS OF SIDE-CHAIN ACCEPTORS ATTACHED DIRECTLY TO THE CARBON ATOMS IN THE CHAIN AND SELECTED FROM THE GROUP CONSISTING OF HYDROXYL GROUPS, MERCAPTANS, PRIMARY AND SECONDARY AMINE GROUPS FOR REACTION WITH THE AROMATIC ACID ANHYDRIDE WHICH IS THE PRECURSOR OF SAID SIDE-CHAINS.