Halobutyl/solution polymerized SBR innerliner
AssigneeThe Goodyear Tire & Rubber Company
InventorsRoger N. Beers, David A. Benko, Bill B. Gross, Adel F. Halasa
Life of this patent
Estimating the term…
Abstract
The present invention relates to a tire innerliner and pneumatic tires containing the same, which are prepared from a composition comprising, based on 100 parts by weight of rubber, a blend containing 30 to about 50 parts by weight of a solution polymerized styrene-butadiene rubber having a Tg ranging from -45.degree. C. to -65.degree. C. and 70 to 50 parts by weight of a halobutyl rubber.
Claims12
A tire innerliner prepared from a composition comprising, based on 100 parts by weight of rubber, a blend of
- (A) about 30 to about 50 parts by weight of a solution polymerized polymer having repeating units and a Tg ranging from -45.degree. C. to -65.degree. C., wherein
- (1) 25 to 40 weight percent of the repeating units are derived from styrene;
- (2) 5 to 30 weight percent of the repeating units have a 1,2-microstructure and are derived from butadiene;
- and
- (3) 40 to 60 weight percent of the repeating units have a 1,4-microstructure and are derived from butadiene;
- and
- (B) about 70 to about 50 parts by weight of a halobutyl rubber.
A pneumatic tire having an innerliner prepared from a composition comprising, based on 100 parts by weight of rubber, a blend of
- (A) about 30 to about 50 parts by weight of a solution polymerized polymer having repeating units and a Tg ranging from -45.degree. C. to -65.degree. C., wherein
- (1) 25 to 40 weight percent of the repeating units are derived from styrene;
- (2) 5 to 30 weight percent of the repeating units have a 1,2-microstructure and are derived from butadiene;
- and
- (3) 40 to 60 weight percent of the repeating units have a 1,4-microstructure and are derived from butadiene;
- and
- (B) about 70 to about 50 parts by weight of a halobutyl rubber.
Dependencies are inferred from the claim text.