US4266772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid golf ball
Assignee: UNIROYAL HOLDING Inc WORLD HEADQUARTERS MIDDLEBURY CONNECTICUT 06749 A CORP OF NEW JERSEY
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Filing: 1972-08-28
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Granted: 1981-05-12
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Expires: 1992-08-28
Abstract
Abstract Solid golf balls, characterized by high initial velocity as well as outstanding retention of properties on continued hitting, are made from a blend of a resilient elastomer (e.g., cis-polybutadiene) and zinc oxide-methacrylic acid reaction product, the composition being cured with a free-radical cross-linking agent such as peroxide.
Inventors
- 👤 Frank S. Martin
- 👤 Terence Melvin
- 👤 Joseph K. Pieroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; A; A63; A63B; A63B37/00; A63B37/0003; A63B45/00; Y; Y10; Y10S; Y10S273/00; Y10S273/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
An integral unitary solid golf ball which approximates performance characteristics of a standard wound golf ball, and retains said characteristics after extended play, made of a composition comprising, by weight, 100 parts of a resilient cis-polybutadiene elastomer having at least 50% of cis-1,4 structure and 10 to 60 parts of preformed zinc oxide-methacrylic acid reaction product in proportions of approximately 1 to 1.5 moles of zinc oxide per mole of methacrylic acid, the said composition being cured with a free-radical generating curing agent, the said preformed zinc oxide-methacrylic acid reaction product being in finely powdered form such as to pass a 200 mesh sieve.
Claim 2
Dependent Claim
104 words
An integral unitary solid golf ball which approximates performance characteristics of a standard wound golf ball, and retains said characteristics after extended play, made of a composition comprising, by weight, 100 parts of a resilient cis-polybutadiene elastomer having at least 50% of cis-1,4 structure and 10 to 60 parts of preformed zinc oxide-methacrylic acid reaction product in proportions of approximately 1 to 1.5 moles of zinc oxide per mole of methacrylic acid, the said composition being cured with a free-radical generating curing agent, the said preformed zinc oxide-methacrylic acid reaction product being in finely powdered form such as to pass a 200 mesh sieve.
Claim 3
Dependent Claim
79 words
A golf ball as in claim 1 in which the composition further contains 5 to 30 parts of an ionomer which is a copolymer of ethylene and 1.0 to 25 mole percent of units derived from an alpha,beta-ethylenically unsaturated mono- or di-caboxylic acid, with at least 10 percent of the acid groups being neutralized by metal ions having a valence of 1 to 3 when the acid is monocarboxylic and a valence of 1 when the acid is dicarboxylic.
Claim 4
Dependent Claim
19 words
A golf ball as in claim 1 in which the composition further contains 2 to 10 parts of litharge.
Claim 5
Dependent Claim
28 words
A golf ball as in claim 1 in which the zinc oxide-methacrylic acid reaction product is in finely powdered form such as to pass a 270 mesh sieve.
Claim 6
Dependent Claim
17 words
A golf ball as in claim 1 in which the free-radical generating curing agent is n-butyl-4,4-bis(t-butylperoxy) valerate.
Claim 7
Dependent Claim
40 words
A golf ball as in claim 1 in which the said reaction product is made by bringing zinc oxide and methacrylic acid monomer together in a liquid medium which serves to dissipate the exothermic heat of reaction which is generated.
Claim 8
Dependent Claim
15 words
A golf ball as in claim 6 in which the said liquid medium is methanol.
Claim 9
Dependent Claim
15 words
A golf ball as in claim 6 in which the said liquid medium is water.
Claim 10
Dependent Claim
29 words
A golf ball as in claim 7 or 8 in which the methacrylic acid is added to a slurry of the zinc oxide in methanol or water, with agitation.
Claim 11
Dependent Claim
117 words
A composition comprising, by weight, 100 parts of a resilient cis-polybutadiene elastomer having at least 50% of cis-1,4 structure and 10 to 60 parts of preformed zinc oxide-methacrylic acid reaction product in proportions of approximately 1 to 1.5 moles of zinc oxide per mole of methacrylic acid the said composition being cured with a free-radical generating curing agent, the said reaction product being made by bringing zinc oxide and methacrylic acid monomer together in a liquid medium which serves to dissipate the exothermic heat of reaction which is generated, the said liquid medium being methanol or water, and the methacrylic acid being added to a slurry of the zinc oxide in said methanol or water, with agitation.
Claim 12
Dependent Claim
117 words
A composition comprising, by weight, 100 parts of a resilient cis-polybutadiene elastomer having at least 50% of cis-1,4 structure and 10 to 60 parts of preformed zinc oxide-methacrylic acid reaction product in proportions of approximately 1 to 1.5 moles of zinc oxide per mole of methacrylic acid the said composition being cured with a free-radical generating curing agent, the said reaction product being made by bringing zinc oxide and methacrylic acid monomer together in a liquid medium which serves to dissipate the exothermic heat of reaction which is generated, the said liquid medium being methanol or water, and the methacrylic acid being added to a slurry of the zinc oxide in said methanol or water, with agitation.
References Cited (Backward Citations)
US3313545A
Cited
US3421766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |