Rubber composition and pneumatic tire using the same in tread.U.S. patent: 7,211,630 Issued: May 1, 2007 Inventors: Koji Masaki and Yoshikatsu Hatakeyama Assigned: Bridgestone Key statement: A robber composition comprising as a rubber component, a specified styrene-butadiene copolymer copolymer: see polymer. (A) and a styrene-isoprene copolymer of a specified hydrogenation hydrogenation (hīdrôj`ənā'shən, hī'drəjənā`shən), chemical reaction of a substance with molecular hydrogen, usually in the presence of a catalyst. ratio (B) wherein where·in adv. In what way; how: Wherein have we sinned? conj. 1. In which location; where: the country wherein those people live. 2. a bound styrene sty·rene n. A colorless oily liquid from which polystyrenes, plastics, and synthetic rubber are produced. Also called vinylbenzene. content of the copolymer (B) is larger by a given value than a bound styrene content of the copolymer (A) is good in the wear resistance and fracture property and further excellent in the wet-skid resistance and dry gripping property. |
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