Patent ID: 6179941
Filing Date: 2001-01-30
Classification: B29D,B60C,C08G,C08L,C09D,Y10S,Y10T

Abstract:
A process for producing a pneumatic tire having an air permeation preventive layer obtained from the coating of a polymer composition on the surface of a carcass layer of a pneumatic tire or on the surface of a rubber layer provided on the surface of the carcass layer, followed by cross-linking or cross-linking and curing; said process comprising:(1) spraying or coating an adhesive on a surface of a carcass layer of a vulcanized tire or on a surface of a rubber layer provided on the surface of the carcass layer of a vulcanized tire,(2) spraying or coating the surface of the coated adhesive with a polymer composition containing(i) at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with (a) alkoxyalkyl groups alone or together with (b) groups having curable unsaturated bonds and(ii) (a) at least one cross-linking agent selected from the group consisting of alkylphenol formalin resins and alkylresorcinol formalin resins and optionally also (b) at least one cross-linking agent selected from the group consisting of sulfur, sulfur-releasing compounds and rubber vulcanization accelerators in the case of the presence of the groups (i)(b) having curable unsaturated bonds in the modified aliphatic polyamide resin, and(3) heating the sprayed or coated polymer composition to form the air permeation prevent layer.