US 7,493,927 B2
	Rubber composition
Yasuhisa Minagawa, Kobe (Japan); and Noriko Yagi, Kobe (Japan)
Assigned to Sumitomo Rubber Industries, Ltd., Kobe-shi (Japan)
Filed on Jan. 26, 2005, as Appl. No. 11/42,109.
Claims priority of application No. 2004-042661 (JP), filed on Feb. 19, 2004.
Prior Publication US 2005/0187332 A1, Aug. 25, 2005
Int. Cl. B60C 1/00 (2006.01); C08K 3/38 (2006.01)

U.S. Cl. 152—209.1  [524/404; 524/405; 524/571]

2 Claims

1. A tire having a tread, wherein said tread is formed from a rubber composition comprising silica and 3 to 15 parts by weight of a silane coupling agent and 1.5 to 15 parts by weight of a potassium tetraborate tetrahydrate based on 100 parts by weight of said silica.