US4337947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf ball
Assignee: Bridgestone Corp
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Filing: 1980-11-21
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Granted: 1982-07-06
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Expires: 2000-11-21
Abstract
Abstract An improved golf ball having a thread-wound central core and an outer cover is provided. The outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of at least one α-olefin and at least one α,β-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer, the content, in said composition, of said polyester elastomer being 50% by weight or less. This golf ball has excellent cutting resistance, "click" characteristics and impact resilience.
Inventors
- 👤 Tasuku Saito
- 👤 Tutomu Noma
- 👤 Tsutomu Matsunaga
- 👤 Chiaki Tanaka
- 👤 Yoko Furuta
- 👤 Nagayoshi Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:19
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L23/0876; A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0023; A63B37/005; A63B37/0051; A63B37/0053; A63B37/007; A63B37/0072; A63B37/0074; A63B37/0077; A63B37/0083; A63B37/0084; A63B37/0088; A63B37/12; C08L67/00; C08L67/02; C08L67/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
In a golf ball comprising a thread-wound central core and an outer cover for the core; the improvement wherein said outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of 75 to 99.8 mole % of at least one α-olefin and 0.2 to 25 mole % of at least one α,β-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer selected from the group consisting of a polyetherester block copolymer, polylactone-ester block copolymer, aliphatic or aromatic dicarboxylic acid copolyester and a mixture of aliphatic dicarboxylic acid copolyester and aromatic dicarboxylic acid copolyester, the content, in said composition, of said polyester elastomer being 3 to 50% by weight.
Claim 2
Dependent Claim
137 words
In a golf ball comprising a thread-wound central core and an outer cover for the core; the improvement wherein said outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of 75 to 99.8 mole % of at least one α-olefin and 0.2 to 25 mole % of at least one α,β-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer selected from the group consisting of a polyetherester block copolymer, polylactone-ester block copolymer, aliphatic or aromatic dicarboxylic acid copolyester and a mixture of aliphatic dicarboxylic acid copolyester and aromatic dicarboxylic acid copolyester, the content, in said composition, of said polyester elastomer being 3 to 50% by weight.
Claim 3
Dependent Claim
16 words
A golf ball as claimed in claim 1, wherein said α-olefin is ethylene, propylene or butene-1.
Claim 4
Dependent Claim
31 words
A golf ball as claimed in claim 1, wherein said α,β-unsaturated carboxylic acid is selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, itaconic acid and maleic acid.
Claim 5
Dependent Claim
34 words
A golf ball as claimed in claim 1, wherein said copolymer further contains 1 to 10 mole % of at least one lower alkyl ester of α,β-unsaturated carboxylic acid as an optional monomeric component.
Claim 6
Dependent Claim
27 words
A golf ball as claimed in claim 4, wherein said lower alkyl ester of α,β-unsaturated carboxylic acid is methyl acrylate, methyl methacrylate, t-butyl acrylate or t-butyl methacrylate.
Claim 7
Dependent Claim
24 words
A golf ball as claimed in claim 1, wherein said metal ion is sodium, potassium, lithium, magnesium, calcium, zinc, aluminum, ferric or ferrous ion.
Claim 8
Dependent Claim
25 words
A golf ball as claimed in claim 1, wherein at least 10% of the carboxyl groups in said copolymer are neutralized with said metal ion.
Claim 9
Dependent Claim
50 words
A golf ball as claimed in claim 1, wherein said polyetherester block copolymer is selected from the group consisting of (i) polyester hard segments comprising dicarboxylic acid components and low molecular weight diol components and (ii) polyether soft segments comprising polymers of alkylene glycols of 2 to 10 carbon atoms.
Claim 10
Dependent Claim
48 words
A golf ball as claimed in claim 1, wherein said polyactone-ester block copolymer is selected from the group consisting of (i) polyester hard segments comprising dicarboxylic acid components and low molecular weight diol components and (ii) polylactone soft segments comprising polymers of lactones of 2 to 10 carbon-atoms.
Claim 11
Dependent Claim
71 words
A golf ball as claimed in claim 1, wherein said aliphatic or aromatic dicarboxylic acid copolyester is selected from the group consisting of copolymers of (i) at least one member selected from the group consisting of aliphatic dicarboxylic acids of 2 to 10 carbon atoms and aromatic dicarboxylic acids and (ii) at least one member selected from the group consisting of aliphatic and alicyclic diols of 2 to 10 carbon atoms.
Claim 12
Dependent Claim
31 words
A golf ball as claimed in claim 1, wherein said polyester elastomer has a resilience of 35% or more and a stress, at 10% strain, of 100 kg/cm 2 or less.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |