Patent ID: 6345656
Filing Date: 2002-02-12
Classification: B32B,B60C,Y10S

Abstract:
A pneumatic tire having an innerliner which comprises:(i) a laminate comprised of a first layer positioned on and adhered to a diene-based rubber-based tire carcass surface comprised of (1) a butyl rubber composition or (b) a diene hydrocarbon-based rubber composition; and a second layer positioned on and adhered to an opposing surface of said first layer; wherein the second layer is a thin film of starch/plasticizer composite; wherein said first layer contains an adhesive agent for said starch/plasticizer composite; or (ii) a starch/plasticizer composite/elastomer layer comprised of a blend of starch/plasticizer composite and dispersion therein of (a) a particulate diene-based rubber composition; wherein the content of said diene-based elastomer particles is from about 10 to about 60 weight percent of said blend, and (b) an adhesive agent for said starch/plasticizer; wherein said starch/plasticizer composite is comprised of starch and plasticizer of a weight ratio in a range of about 0.4/1 to about 5/1; wherein said starch is composed of amylose units to amylopectin units in a ratio of about 15/85 to about 100/0, and has a softening point according to ASTM No. D 1228 in a range of about 180Â° C. to about 220Â° C.; and said starch/plasticizer composite has a softening point in a range of about 110Â° C. to about 170Â° C. according to ASTM No. D1228; and wherein said adhesive agent has a moiety reactive with hydroxyl groups on the surface of the starch/plasticizer composite and another moiety interactive with said diene-based elastomer(s).