Composition and article

Claim 1

AN ACID-RESISTING BOOT HAVING AN UPPER FORMED WITH A CONTINOUS OUTSIDE LAYER OF A SOLID MIXTURE OF 100 PARTS OFOF A TUBBERY COPOLMER OF 90-99.5% OF ISOBUTYLENE AND 10-0.5% OF A CONJUGATED C4 TO C6 DIOLEFIN HYDROCARBON, FROM 10 TO 40 PARTS OF POLYETHYLENE HAVING A MOLECULAR WEIGHT OF FROM 8,000 RO 12,000. FROM 15 TO 70 PARTS OF POLYISOBUTYLENE HAVING A MOLECULAR WEIGHT OF AT LEAST 150,000 AND FROM 50 TO 70 PARTS OF CARBON BLACK HAVING A SURFACE AREA IN ACRES PER POUND NO GREATER THAB 8, AN INTERMEDIATE LAYER OF COATED FABRIC BONDED TO SAID OUTSID LAYER, SAID INTERMEDIATE LAYER HAVING A COATING OF CEMENT COMPRISING RUBBERY COPOLYMER OF 90-99.5% ISOBUTYLENE AND 10-0.5% OF CONJUGATED C4 TO C6 DIOLEFIN HYDROCARBON IN ADMIXTURE WITH CURATIVES THEREFOR, SAID CEMENT BEING DISPOSED ADJACENT TO AND FORMING THE BOND WITH SAID OUTSIDE LAYER OF NATURAL RUBBER APPLIED TO THE OPPOSITE SIDE OF SAID FABRIC, AND LINING LAYER HAVING A COATING OF NATURAL RUBBER BONDED TO SAID FIRST-NAMED