US4688801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of homogeneous molded golf balls
Assignee: Pony Industries Inc
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Filing: 1985-09-23
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Granted: 1987-08-25
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Expires: 2005-09-23
Abstract
Abstract Homogeneous molded one and two-piece golf balls exhibiting, improved compression and fracture strength while maintaining desired rebound, click and feel required in a golf ball, are disclosed. The core of the golf ball is obtained by curing a composition comprising: (a) 100 parts by weight, of a polybutadiene elastomer containing at least 40% cis-1, 4-unsaturation; (b) from about 10 to about 50 parts, by weight, of a coagent comprising (i) an admixture or a reaction product of a polyvalent metal salt of an unsaturated carboxylic acid and an active hydrogen-containing organic filler or (ii) a reaction product obtained by the reaction of unsaturated carboxylic acid with an active hydrogen-containing organic filler, followed by further reaction with a polyvalent metal compound in the presence of said unsaturated carboxylic acid whereby said coagent functions as a crosslinking agent with the polybutadiene elastomer; (c) from about 10 to 30 parts, by weight, of an inert particulate mineral filler; and (d) from about 0.5 to 10 parts, by weight, of a polymerization initiator.
Inventors
- 👤 Ralph H. Reiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:02
CPC Classifications
C; C08; C08L; C08L9/00; C08F; C08F279/00; C08F279/02; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
183 words
A homogeneous molded golf ball exhibiting improved compression and fracture strength while maintaining desired rebound, click, and feel required in a golf ball, obtained by curing a composition comprising: (A) 100 parts, by weight, of a polybutadiene elastomer containing at least 40% of cis-1,4-unsaturation; (B) from about 10 to 50 parts, by weight, of a coagent selected from the group consisting essentially of (i) an admixture of a polyvalent metal salt of an unsaturated acid and an active hydrogen-containing organic filler, and (ii) a reaction product obtained by the reaction of an unsaturated carboxylic acid with an active hydrogen containing organic filler, followed by further reaction with a polyvalent metal compound in the presence of said unsaturated carboxylic acid, whereby said coagent functions as a crosslinking agent with the polybutadiene elastomer said organic filler, unsaturated carboxylic acid and polyvalent metal compound are present in an amount, by weight, of about 4:1:0.5 to about 0.5:1:4, respectively; (C) from about 10 to 30 parts, by weight, of an inert particulate filler; and (D) from about 0.5 to 10 parts, by weight, of a polymerization initiator.
Claim 2
Dependent Claim
183 words
A homogeneous molded golf ball exhibiting improved compression and fracture strength while maintaining desired rebound, click, and feel required in a golf ball, obtained by curing a composition comprising: (A) 100 parts, by weight, of a polybutadiene elastomer containing at least 40% of cis-1,4-unsaturation; (B) from about 10 to 50 parts, by weight, of a coagent selected from the group consisting essentially of (i) an admixture of a polyvalent metal salt of an unsaturated acid and an active hydrogen-containing organic filler, and (ii) a reaction product obtained by the reaction of an unsaturated carboxylic acid with an active hydrogen containing organic filler, followed by further reaction with a polyvalent metal compound in the presence of said unsaturated carboxylic acid, whereby said coagent functions as a crosslinking agent with the polybutadiene elastomer said organic filler, unsaturated carboxylic acid and polyvalent metal compound are present in an amount, by weight, of about 4:1:0.5 to about 0.5:1:4, respectively; (C) from about 10 to 30 parts, by weight, of an inert particulate filler; and (D) from about 0.5 to 10 parts, by weight, of a polymerization initiator.
Claim 3
Dependent Claim
25 words
A two-piece golf ball according to claim 1 wherein said cured composition comprises a central core of the golf ball encased in an outer cover.
Claim 4
Dependent Claim
51 words
A golf ball according to claim 2 wherein said cover comprises an admixture of 100 parts, by weight of the cover, of a metal salt of a copolymer of ethylene and unsaturated carboxylic acid and from between about 0.5 and 10 parts, by weight, of the cover, of an inorganic filler.
Claim 5
Dependent Claim
60 words
A golf ball according to claim 1 or claim 3 wherein said polyvalent metal salt comprises a salt of at least one metal selected from the group consisting of zinc, magnesium, calcium and aluminum, and at least one unsaturated carboxylic acid selected from the group consisting of acrylic, methacrylic and itaconic acid, and said polymerization initiator is an alkyl peroxide.
Claim 6
Dependent Claim
15 words
A golf ball according to claim 4 wherein said polyvalent metal salt is zinc diacrylate.
Claim 7
Dependent Claim
13 words
A golf ball according to claim 5 wherein said organic filler is cellulose.
Claim 8
Dependent Claim
30 words
A golf ball according to claim 1 or claim 3 wherein said coagent comprises an admixture of a polyvalent metal salt of an unsaturated acid and an active hydrogen-containing filler.
Claim 9
Dependent Claim
29 words
A golf ball according to claim 7 wherein said polyvalent metal salt is present in an amount of between about 2:1 and 1:1 by weight, of the organic filler.
Claim 10
Dependent Claim
50 words
A golf ball according to claim 1 or claim 3 wherein said coagent comprises, a reaction product obtained by the reaction of an unsaturated carboxylic acid with an active hydrogen containg organic filler, followed by further reaction with a polyvalent metal compound in the presence of said unsaturated carboxylic acid.
Claim 11
Dependent Claim
79 words
A golf ball according to claim 9 wherein said coagent is obtained by reaction, in the presence of an unsaturated carboxylic acid, of a compound selected from the group consisting of an oxide, hydroxide and carbonate of a polyvalent metal selected from the group consisting of zinc, magnesium, calcium and aluminum, with an active hydrogen-containing organic filler which has been prereacted with at least one unsaturated carboxylic acid selected from the group consisting of acrylic, methacrylic and itaconic acid.
Claim 12
Dependent Claim
30 words
A golf ball according to claim 10 wherein such organic filler, unsaturated carboxylic acid and polyvalent metal compound are present in an amount, by weight, of 2:1:0.8 and 0.8:1:2, respectively.
Claim 13
Dependent Claim
26 words
A golf ball according to claim 11 wherein said coagent is obtained by reaction of zinc oxide with cellulose which has been prereacted with acrylic acid.
Claim 14
Dependent Claim
159 words
In the process for producing a homogeneous molded golf ball by curing an admixture of a polybutadiene elastomer, a crosslinkable monomer, a particulate mineral filler, and a free radical catalyst, the improvement which comprises employing as said crosslinkable monomer from between about 10 and 50 parts, by weight per 100 parts of said elastomer, of a coagent selected from the group consisting essentially of (i) an admixture of a polyvalent metal salt of an unsaturated carboxylic acid and an active hydrogen-containing organic filler, and (ii) a reaction product obtained by the reaction of an unsaturated carboxylic acid with an active hydrogen containing organic filler, followed by further reaction with a polyvalent metal compound in the presence of said unsaturated carboxylic acid, whereby said coagent functions as a crosslinking agent with the polybutadiene elastomer and wherein said organic filler, unsaturated carboxylic acid and polyvalent metal compound are present in an amount, by weight, of about 4:1:0.5 to about 0.5:1:4, respectively.
Claim 15
Dependent Claim
159 words
In the process for producing a homogeneous molded golf ball by curing an admixture of a polybutadiene elastomer, a crosslinkable monomer, a particulate mineral filler, and a free radical catalyst, the improvement which comprises employing as said crosslinkable monomer from between about 10 and 50 parts, by weight per 100 parts of said elastomer, of a coagent selected from the group consisting essentially of (i) an admixture of a polyvalent metal salt of an unsaturated carboxylic acid and an active hydrogen-containing organic filler, and (ii) a reaction product obtained by the reaction of an unsaturated carboxylic acid with an active hydrogen containing organic filler, followed by further reaction with a polyvalent metal compound in the presence of said unsaturated carboxylic acid, whereby said coagent functions as a crosslinking agent with the polybutadiene elastomer and wherein said organic filler, unsaturated carboxylic acid and polyvalent metal compound are present in an amount, by weight, of about 4:1:0.5 to about 0.5:1:4, respectively.
Claim 16
Dependent Claim
28 words
The process according to claim 13, wherein said coagent comprises an admixture of a polyvalent metal salt of an unsaturated carboxylic acid and an active hydrogen-containing organic filler.
Claim 17
Dependent Claim
78 words
The process according to claim 13, wherein said coagent is obtained by reaction, in the presence of an unsaturated carboxylic acid, of a compound selected from the group consisting of an oxide, hydroxide and carbonate of a polyvalent metal selected from the group consisting of zinc, magnesium, calcium and aluminum, with an active hydrogen-containing organic filler which has been prereacted with at least one unsaturated carboxylic acid selected from the group consisting of acrylic, methacrylic and itaconic acid.
Claim 18
Dependent Claim
25 words
The process according to claim 15, wherein said coagent is obtained by reaction of zinc oxide with cellulose which has beeh prereacted with acrylic acid.
References Cited (Backward Citations)
US3438933A
Cited
US3478132A
Cited
US3791655A
Cited
US3974238A
Cited
US4056269A
Cited
US4266772A
Cited
US4068849A
Cited
US4165877A
Cited
US4264075A
Cited
US4169599A
Cited
US4305851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |