Laminated article bonded by a curable polyurethane elastomer and an organic polyisocyanate and process of manufacture

Claim 1

A PROCESS FOR THE MANUFACTURE OF LAMINATED ARTICLES WHICH COMPRISES BONDING TOGETHER AT LEAST TWO LAYERS OF MATERIAL EACH SELECTED FROM THE GROUP OF MATERIALS CONSISTING OF NATURAL RUBBER, WOOD, LEATHER, FABRICS, AND CELLUAR CURED POLYURETHANE ELASTOMERS BY APPLYING BETWEEN SAID LAYERS A CURABLE ADHESIVE COMPOSITION COMPRISING A SOLUTION OF A POLYURETHANE ELASTOMER AND AN ORGANIC POLYISCOYANATE, SAID POLYISOCYANATE BEING USED IN AN AMOUNT OF FROM 8% TO 25% BY WEIGHT OF THE POLYURETHANE ELASTOMER, SAID POLYURETHANE ELASTOMER BEING THE REACTION PRODUCT OF BETWEEN 0.8 AND 1.2 MOLECULAR PROPORTIONS OF AN ORGANIC DIISOCYANATE AND ONE MOLECULAR PROPORTION OF A CRYSTALLINE POLYESTERAMIDE WITH A MELTING POINT NOT EXCEEDING 50*C., PREPARED FROM DICARBOXYLIC ACIDS, GLYCOLS AND COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF AMINOALCOHOLS AND DIAMINES IN SUCH PROPORTIONS THAT FROM 8 TO 64 MOLS OF DICARBOXYLIC ACIDS ARE USED FOR EVERY MOLE OF PRIMARY AMINO GROUPS, SAID POLYESTERAMIDE HAVING AN ACID VALUE OF AT MOST 5 MG. KOH PER G. AND A WATER CONTENT OF AT MOST 0.1% BY WEIGHT, SAID POLYURETHANE ELASTOMER HAVING A WILLIAM PLASTICITY NEMBER OF BETWEEN 100 AND 550.