Process of polymerizing a polyurethane or polyurea resin in the presence of a polyacrylonitrile and product formed thereby

Claim 1

A PROCESS WHICH COMPRISES: (1) DISSOLVING AN ADDITION POLYMER FROM THE CLASS CONSISTING OF POLYACRYLONITRILE AND A COPOLYMER OF ABOUT 50% ACRYLONITRILE, THE REMAINING COPOLYMERIC UNITS BEING DERIVED BY ADDITION COPOLYMERIZATION FROM METHYL ACRYLATE, IN A SOLVENT FROM THE CLASS CONSISTING OF DIMETHYLFORMAMIDE, DIMETHYLACETAMIDE, NMETHYLPYRROLIDONE AND DIMETHYLSULFOXIDE; (2) AND THEREAFTER ADDING AT A TEMPERATURE OF ABOUT 0* C. AND AS A SOLUTION FROM A SOLVENT OF THE SAME CLASS; (I) AN ISOCYANATE FROM THE CLASS CONSISTING OF BIS(4-ISOCYANOTOPHENYL)METHANE AND TOLUENE-2,4DIISOCYANATE, AND (II) A MEMBER OF THE CLASS CONSISTING OF BIS(4AMINOCYCLOHEXYL)METHANE, 2,5 -DIMETHYLPIPERAZINE AND ETHYLENE GLYCOL; (3) MIXING THE RESULTING SOLUTION AT THE TEMPERATURE OF ABOUT 0*C. TO PROMOTE REACTION BETWEEN (I) AND (II); (4) AND THEREAFTER REMOVING SOLVENT BY EVAPORATION TO FORM A CLEAR HOMOGENEOUS MIXTURE OF ADDITION AND CONDENSATION POLYMER.