Molded polymer material and golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsJun Shindo, Atsushi Nanba
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Abstract
The invention provides a molded polymer material which is obtained by subjecting a polymer composition that includes (A) at least one polymer containing α,β-ethylenically unsaturated carboxylic acid, (B) at least one diene polymer, (C) at least one metal cation source, and (D) at least one organic peroxide, and has a chemical structure arrived at by neutralizing some or all of the carboxyl groups in component A with component C in the presence of component B, to molding and crosslinking under the influence of radicals generated by decomposing component D. The molded polymer material has a high resilience, a high hardness and a good durability, making it well-suited for use in golf balls.
Claims32
A molded polymer material obtained by subjecting a polymer composition comprising:
- (A) at least one polymer containing α,β-ethylenically unsaturated carboxylic acid,
- (B) at least one diene polymer,
- (C) at least one metal cation source, and
- (D) at least one organic peroxide, and having a chemical structure arrived at by neutralizing some or all of the carboxyl groups in component A with component C in the presence of component B, to molding and crosslinking under the influence of radicals generated by decomposing component D.
A golf ball which is a one-piece golf ball or a multi-layer golf ball that includes a core and one or more cover layer enclosing the core, comprising at least one member selected from among the one-piece golf ball, the core and the one or more cover layer which is formed of a molded polymer material obtained by subjecting a polymer composition comprising:
- (A) at least one polymer containing an α,β-ethylenically unsaturated carboxylic acid,
- (B) at least one diene polymer,
- (C) at least one metal cation source, and
- (D) at least one organic peroxide, and having a chemical structure arrived at by neutralizing some or all of the carboxyl groups in component A with component C in the presence of component B, to molding and crosslinking under the influence of radicals generated by decomposing component D.
Dependencies are inferred from the claim text.