Laminating adhesives

Claim 1

A LAMINATE OF THE GROUP CONSISTING OF SARAN ADHESIVELY BONDED TO SARAN, SARAN ADHERED TO TREATED POLYETHYLENE OR TREATED POLYPROPYLENE, AND TREATED POLYETHYLENE ADHERED TO TREATED POLYETHYLENE WHEREIN THE ADHESIVE IS A MIXTURE OF A MINOR AMOUNT OF A TERPENE URETHANE RESIN WHICH IS THE REACTION PRODUCT OF A TERPENE ALCOHOL WITH A POLYISOCYANATE, AND A MAJOR AMOUNT OF A WATER SOLUBLE SALT OF A SUBSTANTIALLY LINEAR THERMOPLASTIC POLYURETHANE CONTAINING 0.5 TO 2.5% BY WEIGHT OF NITROGEN DERIVED FROM TERITARY AMINE GROUPS, AND FROM 2 TO 8% OF NITROGEN DERIVED FROM ISOCYANATE GROUPS, SAID POLYURETHANE BEING PREPARED BY (A) REACTING AN EXCESS OF AN ISOCYANATE WITH A MIXTURE OF DIOLS CONSISTING OF POLYETHER DIOLS HAVING A MOLECULAR WEIGHT OF FROM 425 TO 4.000 AND TERTIARY AMINE DIOLS SELECTED FORM THE GROUP CONSISTING OF N-PHENYL DIALKANOL AMINE AND N-LOWER ALKYL DIALKANOL AMINES TO OBTAIN A REACTION PRODUCT HAVING FREE ISOCYANATED GROUPS GREATER THAN 0.1 MILLIEQUIVALENTS OF NCO PER GRAM OF SOLUTION AT 50% SOLIDS, (B) CHAIN EXTENDING THE REACTION PRODUCT WITH A CHAIN EXTENDER SELECTED FROM THE GROUP CONSISTING OF ALKANOL AMINES AND ALKYLENE DIAMINES TO OBTAIIN A CHAIN EXTENDED POLYURETHANE POLYMER CONTAINING FROM 0.07 TO 0.1 MILLIEQUIVALENTS OF NCO PER GRAM OF 50% SOLUTION, (C) REACTING THE FREE ISOCYANATE GROUPS WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER MMISCIBLE ALCOHOLS, WATER MISCIBLE ACIDS AND WATER, AN AMOUNT OF A WATER MISCIBLE ACID BEING ADDED SUFFICIENT TO FORM THE ACIDS SALTS OF THE TETIARY AMINE GROUPS PRESENT ON THE POLYURETHANE.