Title:
PNEUMATIC TIRE HAVING AIR RETENTION TOEGUARD
Document Type and Number:
Japanese Patent JP2999008
Kind Code:
B2
Abstract:
PURPOSE: To obtain a pneumatic tire having high resistance to air permeation by fixing a specific toeguard composition comprising a butyl rubber or a halobutyl rubber and an epoxidized natural rubber to the bead area of the tire.
CONSTITUTION: A rubber tire has a toeguard-constituting part integral with a sulfur cured rubber composition layer formed as the outer layer in the bead area of the tire, said toeguard constituting part comprising a blend of (A) about 20-60 pts.wt. at least one of a butyl rubber and a halobutyl rubber and (B) about 80-40 pts.wt. rubber comprising about 10-100 wt.% epoxidized cis-1,4- polyisoprene rubber and up to 90 wt.% cis-1,4-polyisoprene rubber, said epoxidized rubber having a glass transition temperature (Tg) of about -10°C to -60°C.
Inventors:
Paul Harry Sandstrom
William Paul Francsic
William Paul Francsic
Application Number:
JP8741891A
Publication Date:
January 17, 2000
Filing Date:
March 28, 1991
Export Citation:
Assignee:
THE GOODYEAR TIRE & RUBBER COMPANY
International Classes:
B60C1/00; B60C5/14; B60C5/16; C08L9/00; C08L21/00; (IPC1-7): C08L7/00; B60C5/14; B60C5/16; C08L15/00; C08L23/22; C08L23/28
Attorney, Agent or Firm:
Tadashi Wakabayashi