Tire with layer for retardation of air permeation

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 180° C. to about 220° C.;
• and said starch/plasticizer composite has a softening point in a range of about 110° C. to about 170° 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).