Process for cross-linking polyurethanes by the formation of quaternary nitrogens

Claim 1

A PROCESS FOR THE PREPARATION OF CROSS-LINKED POLYURETHANE PLASTICS WHICH COMPRISES PREPARING IN THE FIRST STEP (1) A POLYURETHANE INTERMEDIATE BY REACTING (A) A POLYHYDRIC POLYALKYLENE ETHER, (B) AN ORGANIC POLYISOCYANATE AND (C) A CHAIN EXTENDING AGENT HAVING ACTIVE HYDROGEN ATOMS WHICH ARE REACTIVE WITH NCO GROUPS AND HAVING A MOLECULAR WEIGHT LESS THAN ABOUT 500, SAID POLYURETHANE INTERMEDIATE CONTAINING GROUPS SELECTED FROM THE CLASS CONSISTING OF TERTIARY AMINO GROUPS, CHLORINE ATOMS, BROMINE ATOMS, AND ORGANO SULFONATE GROUPS AND REACTING SAID POLYURETHANE INTERMEDIATE WITH (2) A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) A QUATERNIZING CROSS-LINKING AGENT CONTAINING AT LEAST 2 GROUPS SELECTED FROM CHLORINE ATOMS, BROMINE ATOMS, AND ORGANO SULFONATE GROUPS AND (B) A QUATERNIZABLE CROSS-LINKING AGENT CONTAINING AT LEAST 2 TERTIARY AMINO GROUPS, WHEN SAID POLYURETHANE INTERMEDIATE CONTAINS CHLORINE ATOMS, BROMINE ATOMS, OR ORGANO SULFONATE GROUPS, SAID CROSS-LINKING AGENT IS A QUATERNIZABLE CROSS-LINKING AGENT, AND WHEN SAID POLYURETHANE INTERMEDIATE CONTAINS TERTIARY AMINO GROUPS, SAID CROSS-LINKING AGENT IS A QUATERNIZING CROSSLINKING AGENT.