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:
May. 25, 2010
Filed:
Aug. 22, 2008
Hiroshi Higuchi, Chichibu, JP;
Nobuyuki Kataoka, Chichibu, JP;
Atsushi Nanba, Chichibu, JP;
Hiroto Sasaki, Chichibu, JP;
Hiroshi Higuchi, Chichibu, JP;
Nobuyuki Kataoka, Chichibu, JP;
Atsushi Nanba, Chichibu, JP;
Hiroto Sasaki, Chichibu, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
A golf ball which is formed from a vulcanized rubber compound composed of 100 parts by weight of a rubber base material, 10 to 60 parts by weight of an unsaturated carboxylic acid and/or a metal salt thereof, 0.1 to 5 parts by weight of an organosulfur compound, 5 to 80 parts by weight of an inorganic filler, and 0.1 to 3 parts by weight of an organic peroxide, the rubber base material being composed of a first polybutadiene accounting for 50 to 95 wt % and a second polybutadiene accounting for 5 to 50 wt %, both polybutadiene being synthesized by using a rare earth element-based catalyst, the first polybutadiene containing no less than 60 wt % of cis-1,4 bonds and having a Mooney viscosity (ML1+4 (100° C.)) no lower than 50 and the second polybutadiene containing no less than 60 wt % of cis-1,4 bonds and having a Mooney viscosity (ML1+, (100° C.)) no higher than 45. The golf ball is characterized by good rebound resilience and good workability with which it is produced.