Sealing composition of polybutene and butyl rubber, method of preparation and method of sealing therewith

Claim 1

A READILY FLOWABLE, ROOM TEMPERATURE VULCANIZABLE, SLOW CURING, PLASTIC SEALING COMPOSITION, SAID COMPOSITION CONSISTING ESENTIALLY OF (A) A LOW MOLECULAR WEIGHT HYDROCARBON POLYMER OF A MONOOLEFINICALLY UNSATURATED HYDROCABON MONOMER HAVING FOUR CARBON ATOMS, AND LOW MOLECULAR WEIGHT POLYMER HAVING A MOLECULAR WEIGHT RINGING FROM 300 TO 15,000; (B) A VULCANIZABLE HIGH MOLECULAR WEIGHT HYDROCARBON COPOLYMER OF (1) 70 TO 99.5 PARTS BY WEIGHT OF A MONOOLEFINICALLY UNSATURATED HYDROCARBON MONOMER HAVING FOUR CARBON ATOMS, AND (2) 0.5 TO 30 PARTS BY WEIGHT OF A DIOLEFINICALLY UNSATURATED HYDROCARBON MONOMER HAVING FROM FOUR TO SIX CARBON ATOMS, SAID HIGH MOLECULAR WEIGHT COPOLYMER HAVING A MOLECULAR WEIGHT RANGING FROM 25,000 TO 100,000; (C) A HYDROCARBON SOLVENT FOR THE SAID LOWER MOLECULAR WEIGHT POLYMER (A), AND THE SAID HIGH MOLECULAR WEIGH COPOLYMER (B), SAID SOLVENT BEING VAPORIZABLE AT ROOM TEMPERATURE AND ATMOSPHERIC PRESSURE; AND (D) A VULCANIZING AGENT WHICH IS INCAPABLE OF EFFECTING VULCANIZATION IN THE PRESENCE OF SOLVENT (C) RECITED HEREINABOOVE AT TEMPERATURES BELOW 100*F. WHILE AT ATMOSPHERIC PRESSURE, YET WHICH IS CAPABLE OF EFFECTING GRADUAL, DELAYED VULCANIZATION AT ROOM TEMPERATURE WHILE AT ATMOSPHERIC PRESSURE UPON EVAPORATION OF SAID SOLVENT, SAID VULCANIZING AGENT BEING DISPERSED IN SAID SOLVENT; AND WHEREIN THE WEIGHT RATIO OF SAID LOW MOLECULAR WEIGHT POLYMER (A) TO SAID HIGH MOLECULAR WEIGHT POLYMER (B) IS FROM 0.45 TO 2.1:1.