Blend of isoolefin-diolefin and polychloroprene synthetic rubbers for adhering isoolefin-diolefin rubber to other materials

Claim 1

A FLEXIBLE, VULCANIZABLE, COMPOSITE STRUCTURE COMPRISING A LAYER OF CRUDE RUBBER; A LAYER COMPRISING A RUBBERY COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLEFIN HAVING FROM 4 TO 5 CARBON ATOMS WITH A MINOR PROPORTIONS OF AN OPEN-CHAIN CONJUGATED DIOLEFIN HAVING FROM 4 TO 6 CARBON ATOMS; AND AN INTERPOSED LAYER OF A SOLID, FLEXIBLE ADHESIVE IN DIRECT ADHERING CONTACT WITH EACH OF THE AFORESAID LAYERS COMPRISING FROM 80 TO 20 PARTS BY WEIGHT OF A RUBBERY COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLEFIN HAVING FROM 4 TO 7 CARBON ATOMS WITH A MINOR PROPORTION OF AN OPEN-CHAIN CONJUGATED DIOLEFIN HAVING FROM 4 TO 8 CARBON ATOMS, AND FROM 20 TO 80 PARTS BY WEIGHT OF A RUBBERY POLYMER OF A CHLOROBUTADIENE-1,3.

Claim 3

A METHOD OF ADHERING A RUBBERY COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLFEIN HAVING FROM 4 TO 7 CARBON ATOMS WITH A MINOR PROPORTION OF AN OPEN-CHAIN CONJUATED DIOLFIN HAVING FROM 4 TO 8 CARBON ATOMS TO AN UNVULCANIZED RUBBER COMPRISING INTERPOSING BETWEEN AND IN DIRECT CONTACT WITH LAYERS OF SAID RUBBERY COPOLYMER AND SAID RUBBER A PREFORMED, SOLID LAYER OF A VULCANIZABLE ADHESIVE COMPOSITION WHICH COMPRISES SUBSTANTIALLY EQUAL PARTS OF SAID RUBBERY COPOLYMER AND A POLYMER OF A CHLOROBUTADIENE-1,3; AND HEATING THE COMPOSITE PRODUCT TO VULCANIZE THE VULCANIZABLE CONSTITUENTS.

Claim 4

A METHOD OF ADHERING A RUBBERY COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLFEIN HAVING FROM 4 TO 7 CARBON ATOMS WITH A MINOR PROPORTION OF AN OPEN-CHAIN CONJUATED DIOLFIN HAVING FROM 4 TO 8 CARBON ATOMS TO AN UNVULCANIZED RUBBER COMPRISING INTERPOSING BETWEEN AND IN DIRECT CONTACT WITH LAYERS OF SAID RUBBERY COPOLYMER AND SAID RUBBER A PREFORMED, SOLID LAYER OF A VULCANIZABLE ADHESIVE COMPOSITION WHICH COMPRISES SUBSTANTIALLY EQUAL PARTS OF SAID RUBBERY COPOLYMER AND A POLYMER OF A CHLOROBUTADIENE-1,3; AND HEATING THE COMPOSITE PRODUCT TO VULCANIZE THE VULCANIZABLE CONSTITUENTS.