The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2006
Filed:
Apr. 25, 2003
Hiroshi Higuchi, Chichibu, JP;
Nobuyuki Kataoka, Chichibu, JP;
Atsushi Nanba, Chichibu, JP;
Hiroyuki Nagasawa, Chichibu, JP;
Hiroshi Higuchi, Chichibu, JP;
Nobuyuki Kataoka, Chichibu, JP;
Atsushi Nanba, Chichibu, JP;
Hiroyuki Nagasawa, Chichibu, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
A golf ball is characterized by comprising a molded and vulcanized product of a rubber composition as a constituent component, the rubber composition comprising 100 pbw of a base rubber including 60–100 wt % of a polybutadiene containing at least 60 wt % of cis-1,4-bond, having a Mooney viscosity (ML(100° C.)) of at least 40, and synthesized using a rare-earth catalyst, 10–60 pbw of an unsaturated carboxylic acid and/or a metal salt thereof, 0.1–5 pbw of an organosulfur compound, 5–80 pbw of an inorganic filler, and at least two organic peroxides including an organic peroxide having the shortest half-life at 155° C. designated (a) and another organic peroxide having the longest half-life at 155° C. designated (b), a ratio of half-lives (b/a) being from 7 to 20 wherein ais the half-life of (a) and bis the half-life of (b), a total content of the organic peroxides being 0.1–0.8 pbw per 100 pbw of the base rubber.