Curing type adhesives comprising polyester-polyisocyanate reaction product, tackifying resin and mineral filler

Claim 1

A GEL RESISTANT STORABLE ADHESIVE COMPOSITION CURABLE BY REACTION WITH A ARYLENE POLYISOCYANATE COMPRISING A SOLUTION IN A VOLATILE ORGANIC SOLVENT OF (1) THE PRODUCT OF REACTING ONE MOL OF A POLYESTER FROM ESTERIFICATION AND POLYMERIZATION OF A SATURATE DIBASIC ACID AND A GLYCOL AND HAVING AN ACID NUMBER OF FROM 0 TO 12, A HYDROXYL NUMBER OF FROM 30 TO 140 AND A MOLECULAR WEIGHT OF FROM 2000 TO 4000 WITH FROM ABOUT 0.9 TO ABOUT 1.4 MOLS OF AN ORGANIC DIISCOYANATE, (2) A TACKIFYING RESIN COMPATIBLE WITH SAID PRODUCT OF REACTION AND HAVING A MELTING POINT OF FROM 20*C. TO 110*C., SAID TACKIFYING RESIN BEING SELECTED FROM THE GROUP CONSISTING OF A GLYCIDYL ETHER POLYEPOXIDE RESIN, A RESINOUS CHLORINATED POLYPHENYL AND AN ALKALI-CATALYZED HEAT-ADVANCING CONDENSATION PRODUCT OF ONE MOL OF A PARA-SUBSTITUTED PHENOL AND ABOUT ONE MOL OF FORMALDEHYDE, AND (3) FROM ABOUT 30% TO ABOUT 60% BY WEIGHT OF SAID PRODUCT OF REACTION OF A MINERAL FILLER MIXTURE, SAID MINERAL FILLER MIXTURE COMPRISING, BASED ON THE WEIGHT OF SAID PRODUCT OF REACTION, FROM ABOUT 10% TO ABOUT 25% BY WEIGHT OF FIBROUS MAGNESIUM SILICATE, FROM ABOUT 15% TO ABOUT 35% BY WEIGHT OF FINELY DIVIDED CALCIUM SILICATE, AND FROM ABOUT 5% TO ABOUT 20% BY WEIGHT OF FINELY GROUND, SUBSTANTIALLY IRON-FREE SILICA.