US4258770A
Expired / Lapsed
US
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Cured rubber skim stock compositions having improved metal adhesion and metal adhesion retention
Assignee: Bridgestone Research LLC
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Filing: 1979-08-22
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Granted: 1981-03-31
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Expires: 1999-08-22
Abstract
Abstract Disclosed is a composition for the improvement of the adhesion and adhesion retention between conventional rubber skim stock compositions, utilized in the manufacture of tires, conveyor belts, hoses and the like, and metallic reinforcement cords such as brassed steel. The invention composition is prepared by incorporating an inorganic salt of cobalt or nickel and a rosin-derived resin into the rubber stock prior to contacting the metallic reinforcement. Tests conducted with brass-plated and zinc-plated steel cords showed improved metal adhesion and metal adhesion retention with use of the rubber skim stock of this invention when compared to existing formulations.
Inventors
- 👤 James A. Davis
- 👤 Jung W. Kang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:28
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/10; C08K; C08K3/00; C08K3/10; C08K3/11; C08L; C08L21/00; C08L7/00; C08J2321/00; C08L93/00; C08L93/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
Cured rubber skim stock compositions having improved metal adhesion and metal adhesion retention properties, said composition comprising: 100parts of a vulcanizable rubber stock; from about 2.0 to about 10.0 parts by weight of a resin comprising resin acids containing carboxylic acid groups and derived from crude wood rosin, per 100 parts of the rubber component in said rubber stock; and, from about 0.05 to about 10.0 parts by weight of an inorganic cobalt salt, per 100 parts of the rubber component in said rubber skim stock.
Claim 2
Dependent Claim
86 words
Cured rubber skim stock compositions having improved metal adhesion and metal adhesion retention properties, said composition comprising: 100parts of a vulcanizable rubber stock; from about 2.0 to about 10.0 parts by weight of a resin comprising resin acids containing carboxylic acid groups and derived from crude wood rosin, per 100 parts of the rubber component in said rubber stock; and, from about 0.05 to about 10.0 parts by weight of an inorganic cobalt salt, per 100 parts of the rubber component in said rubber skim stock.
Claim 3
Dependent Claim
19 words
Cured rubber skim stock composition as set forth in claim 1, wherein said inorganic cobalt salt is cobalt hydrate.
Claim 4
Dependent Claim
38 words
Cured rubber skim stock compositions, as set forth in claims 1 or 2 wherein said metal is present in a metallic reinforcing cord selected from the group consisting of steel cord, brass-plated steel cord and zinc-plated steel cord.
Claim 5
Dependent Claim
85 words
A tire having metallic reinforcing elements embedded in vulcanized rubber skim stock, said skim stock being characterized by having incorporated therein: from about 2.0 to about 10.0 parts by weight of a resin comprising resin acids containing carboxylic acid groups and derived from crude wood rosin, per 100 parts of the rubber component in said rubber skim stock; and, from about 0.05 to about 10.0 parts by weight of an inorganic cobalt salt, per 100 parts of the rubber component in said rubber skim stock.
Claim 6
Dependent Claim
85 words
A tire having metallic reinforcing elements embedded in vulcanized rubber skim stock, said skim stock being characterized by having incorporated therein: from about 2.0 to about 10.0 parts by weight of a resin comprising resin acids containing carboxylic acid groups and derived from crude wood rosin, per 100 parts of the rubber component in said rubber skim stock; and, from about 0.05 to about 10.0 parts by weight of an inorganic cobalt salt, per 100 parts of the rubber component in said rubber skim stock.
Claim 7
Dependent Claim
38 words
A tire, as set forth in claim 4, wherein the metallic reinforcing elements are selected from the group consisting of steel cord, brass-plated steel cord and zinc-plated steel cord and wherein said inorganic cobalt salt is cobalt hydrate.
Claim 8
Dependent Claim
83 words
Cured rubber skim stock compositions having improved metal adhesion and metal adhesion retention properties, said composition comprising: 100 parts of a vulcanizable rubber stock; from about 2.0 to about 10.0 parts by weight of a thermoplastic resin insoluble in aliphatic hydrocarbons and derived from crude wood rosin, per 100 parts of the rubber component in said rubber stock; and, from about 0.05 to about 10.0 parts by weight of cobalt hydrate, per 100 parts of the rubber component in said rubber skim stock.
Claim 9
Dependent Claim
83 words
Cured rubber skim stock compositions having improved metal adhesion and metal adhesion retention properties, said composition comprising: 100 parts of a vulcanizable rubber stock; from about 2.0 to about 10.0 parts by weight of a thermoplastic resin insoluble in aliphatic hydrocarbons and derived from crude wood rosin, per 100 parts of the rubber component in said rubber stock; and, from about 0.05 to about 10.0 parts by weight of cobalt hydrate, per 100 parts of the rubber component in said rubber skim stock.
Claim 10
Dependent Claim
81 words
A tire having metallic reinforcing elements embedded in vulcanized rubber skim stock, said skim stock being characterized by having incorporated therein: from about 2.0 to about 10.0 parts by weight of a thermoplastic resin insoluble in aliphatic hydrocarbons and derived from crude wood rosin, per 100 parts of the rubber component in said rubber skim stock; and, from about 0.05 to about 10.0 parts by weight of cobalt hydrate, per 100 parts of the rubber component in said rubber skim stock.
Claim 11
Dependent Claim
81 words
A tire having metallic reinforcing elements embedded in vulcanized rubber skim stock, said skim stock being characterized by having incorporated therein: from about 2.0 to about 10.0 parts by weight of a thermoplastic resin insoluble in aliphatic hydrocarbons and derived from crude wood rosin, per 100 parts of the rubber component in said rubber skim stock; and, from about 0.05 to about 10.0 parts by weight of cobalt hydrate, per 100 parts of the rubber component in said rubber skim stock.
Claim 12
Dependent Claim
29 words
A tire, as set forth in claim 7, wherein the metallic reinforcing elements are selected from the group consisting of steel cord, brass-plated steel cord and zinc-plated steel cord.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |