Golf ball composition and golf ball
AssigneesBridgestone Sports Co., Ltd., Bridgestone Corporation
InventorsHideo Takeichi, Takashi Ohira, Yuichiro Ozawa, Tsuyoshi Nakajima, Satoru Tamaki, Yusuke Yamagata, Teppei Mori
Life of this patent
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Abstract
A golf ball having a good rebound and excellent flight performance can be obtained using a golf ball composition which contains a diene polymer having an aluminum catalyst residue content of not more than 650 ppm.
Claims10
A golf ball composition comprising a diene polymer, an unsaturated carboxylic acid and/or a metal salt thereof, and an organic peroxide, wherein the diene polymer has an aluminum catalyst residue content of not more than 300 ppm;
- wherein the diene polymer has a cis-1,4 bond content of at least 90% and a 1,2-vinyl bond content of not more than 2.0%, and a molecular weight distribution (Mw/Mn) of not more than 3;
- wherein the diene polymer is synthesized using as a catalyst at least one type of complex selected from the group consisting of metallocene complexes of general formulae (I) and (II) below, and half-metallocene cation complexes of general formula (III) below;
- wherein the center metal M in general formulas (I), (II), and (III) is a lanthanide element:
- wherein in formula (I), M is a lanthanide element;
- each occurrence of CpR is a substituted or unsubstituted indenyl;
- Ra to Rf are each independently an alkyl group of 1 to 3 carbons or a hydrogen atom;
- L is a neutral Lewis base;
- and w is an integer from 0 to 3;
- wherein in formula (II), M is a lanthanide element;
- each occurrence of CpR is a substituted or unsubstituted indenyl;
- X′ is a hydrogen atom, a halogen atom, an alkoxide group, a thiolate group, an amide group, a silyl group or a hydrocarbon group of 1 to 20 carbons;
- L is a neutral Lewis base;
- and w is an integer from 0 to 3;
- wherein in formula (III), M is a lanthanide element;
- CpR′ is a substituted or unsubstituted cyclopentadienyl, indenyl or fluorenyl;
- X is a hydrogen atom, a halogen atom, an alkoxide group, a thiolate group, an amide group, a silyl group or a hydrocarbon group of 1 to 20 carbons;
- L is a neutral Lewis base;
- w is an integer from 0 to 3;
- and [B]− is a non-coordinating anion,
- further comprising aluminoxanes as co-catalysts, wherein an elemental ratio Al/M of the aluminum element Al in the aluminoxane to the center metal M in the metallocene complex is from 10 to 1,000.
A golf ball comprising a solid core of one or more layer and, outside of the core, a cover of one or more layer, wherein the solid core is formed of a golf ball composition comprising a diene polymer having an aluminum catalyst residue content of not more than 300 ppm, an unsaturated carboxylic acid and/or a metal salt thereof, and an organic peroxide;
- wherein the diene polymer has a cis-1,4 bond content of at least 90% and a 1,2-vinyl bond content of not more than 2.0%, and a molecular weight distribution (Mw/Mn) of not more than 3;
- wherein the diene polymer is synthesized using as a catalyst at least one type of complex selected from the group consisting of metallocene complexes of general formulae (I) and (II) below, and half-metallocene cation complexes of general formula (III) below;
- and the center metal M in general formulae (I), (II) and (III) is a lanthanide element.
- wherein in formula (I), M is a lanthanide element;
- each occurrence of CpR is a substituted or unsubstituted indenyl;
- Ra to Rf are each independently an alkyl group of 1 to 3 carbons or a hydrogen atom;
- L is a neutral Lewis base;
- and w is an integer from 0 to 3;
- wherein in formula (II), M is a lanthanide element;
- each occurrence of CpR is a substituted or unsubstituted indenyl;
- X′ is a hydrogen atom, a halogen atom, an alkoxide group, a thiolate group, an amide group, a silyl group or a hydrocarbon group of 1 to 20 carbons;
- L is a neutral Lewis base;
- and w is an integer from 0 to 3;
- wherein in formula (III), M is a lanthanide element;
- CpR′ is a substituted or unsubstituted cyclopentadienyl, indenyl or fluorenyl;
- X is a hydrogen atom, a halogen atom, an alkoxide group, a thiolate group, an amide group, a silyl group or a hydrocarbon group of 1 to 20 carbons;
- L is a neutral Lewis base;
- w is an integer from 0 to 3;
- and [B]− is a non-coordinating anion,
- further comprising aluminoxanes as co-catalysts, wherein an elemental ratio Al/M of the aluminum element Al in the aluminoxane to the center metal M in the metallocene complex is from 10 to 1,000.
Dependencies are inferred from the claim text.