EP0470854A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Golf ball
Assignee: Sumitomo Rubber Industries Ltd
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Filing: 1991-08-09
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Granted: —
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Expires: 2011-08-09
Abstract
Abstract The present invention provides a golf ball having excellent impact resilience and good flying performance, which comprises a core and a cover covering the core, wherein the cover contains at least 20 % by weight of a carboxyl-rich ionomer resin prepared by neutralizing 15 to 80 mol % of carboxylic acid groups of an olefinic copolymer containing 16 to 30 % by weight of an alpha, beta-ethylenic unsaturated carboxylic acid with monovalent or divalent metal ions.
Inventors
- 👤 Kuniyasu Horiuchi
- 👤 Seiichiro Endo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 03:53
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/025; A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0023; A63B37/005; A63B37/0051; A63B37/0053; A63B37/007; A63B37/0072; A63B37/0074; A63B37/0077; A63B37/0084; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A golf ball comprising a core and a cover covering said core, wherein said cover contains at least 20 % by weight of a carboxyl-rich ionomer resin prepared by neutralizing 15 to 80 mol % of carboxylic acid groups of an olefinic copolymer containing 16 to 30 % by weight of an alpha, beta-ethylenic unsaturated carboxylic acid with monovalent or divalent metal ions.
Claim 2
Dependent Claim
47 words
A golf ball as claimed in Claim 1 wherein the olefinic copolymer is obtained by copolymerizing an alpha-olefin with an alpha, beta-ethylenic unsaturated carboxylic acid; an amount of the alpha, beta-ethylenic unsaturated carboxylic acid being 16 to 30 % by weight based on the total monomer weight.
Claim 3
Dependent Claim
28 words
A golf ball as claimed in Claim 1 or Claim 2 wherein the alpha, beta-ethylenic unsaturated carboxylic acid includes acrylic acid, methacrylic acid, maleic acid or fumaric acid.
Claim 4
Dependent Claim
19 words
A golf ball as claimed in any one of the preceding claims wherein the alpha-olefin includes ethylene or propylene.
Claim 5
Dependent Claim
39 words
A golf ball as claimed in any one of the preceding claims wherein the metal ions are any one of lithium ions, sodium ions, potassium ions, magnesium ions, calcium ions, zinc ions copper ions or two or more thereof.
Claim 6
Dependent Claim
26 words
A golf ball as claimed in any one of the preceding claims wherein the carboxyl-rich ionomer resin has a stiffness modulus of 3,000 to 6,000 kgf/cm².
Claim 7
Dependent Claim
23 words
A golf ball as claimed in any one of the preceding claims wherein the cover comprises the carboxyl-rich ionomer resin and an additive.
Claim 8
Dependent Claim
27 words
A golf ball as claimed in any one of the preceding claims wherein the cover comprises the carboxyl-rich ionomer resin, a conventional ionomer resin and an additive.
Claim 9
Dependent Claim
23 words
A golf ball as claimed in any one of the preceding claims wherein the core is a solid core or a thread-wound core.
References Cited (Backward Citations)
No citation records indexed.
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