US4987192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored tire stocks having improved abrasion resistance, color and color stability
Assignee: Bridgestone Americas Tire Operations LLC
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Filing: 1989-05-19
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Granted: 1991-01-22
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Expires: 2009-05-19
Abstract
Abstract Colored tire stocks having improved abrasion resistance, color and color stability as compared to conventional colored tire stocks such as white sidewall stocks are provided. The colored tire stocks of the invention comprise crosslinked colored rubber compositions containing from 10 to 90% of ionic crosslinks and from 90 to 10% of free radical induced covalent crosslinks. These colored tire stocks may be utilized as functional tire stocks such as colored sidewall stocks (e.g. white sidewalls) or as decorative tire stocks such as raised colored letters (e.g. raised white letters) which identify the tire manufacturer.
Inventors
- 👤 Arthur E. Oberster
- 👤 Charles M. Roland
- 👤 Georg G. A. Bohm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:16
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/243; B; B60; B60C; B60C1/00; B60C1/0025; C08K; C08K3/00; C08K3/01; C08K3/011; C08K5/00; C08K5/0008; C08K5/0025; C08J2321/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
41 words
A colored tire stock, other than black colored, having improved abrasion resistance, color and color stability comprising a crosslinked colored rubber composition containing from 10 to 90% of ionic crosslinks and from 90 to 10% of free radical induced covalent crosslinks.
Claim 2
Dependent Claim
41 words
A colored tire stock, other than black colored, having improved abrasion resistance, color and color stability comprising a crosslinked colored rubber composition containing from 10 to 90% of ionic crosslinks and from 90 to 10% of free radical induced covalent crosslinks.
Claim 3
Dependent Claim
54 words
The colored tire stock of claim 1 wherein said colored rubber composition prior to crosslinking comprises a rubber which is capable of undergoing ionic and covalent crosslinking; an ionic crosslinking agent selected from the group consisting of metal salts of carboxylic acids and inorganic metal salts and a free radical generating covalent crosslinking agent.
Claim 4
Dependent Claim
27 words
The colored tire stock of claim 2 wherein said rubber is selected from the group consisting of saturated rubbers, unsaturated rubbers, acid group-containing rubbers and blends thereof.
Claim 5
Dependent Claim
30 words
The colored tire stock of claim 3 wherein said saturated rubbers are selected from the group consisting of hydrogenated styrene-butadiene rubbers, hydrogenated polybutadiene rubbers, butyl rubbers and halogenated butyl rubbers.
Claim 6
Dependent Claim
31 words
The colored tire stock of claim 3 wherein said unsaturated rubbers are selected from the group consisting of natural rubber, styrene-butadiene rubber, polybutadiene rubber, ethylene/propylene/diene monomer terpolymer rubber and blends thereof.
Claim 7
Dependent Claim
24 words
The colored tire stock of claim 3 wherein said acid group-containing rubbers are selected from the group consisting of carboxylated rubbers and sulfonated rubbers.
Claim 8
Dependent Claim
28 words
The colored tire stock of claim 6 wherein said carboxylated rubbers are selected from the group consisting of carboxylated styrene-butadiene rubber, carboxylated polybutadiene rubber and carboxylated nitrile rubber.
Claim 9
Dependent Claim
28 words
The colored tire stock of claim 6 wherein said sulfonated rubbers are selected from the group consisting of sulfonated styrene-butadiene rubber and sulfonated ethylene/propylene/ diene monomer terpolymer rubber.
Claim 10
Dependent Claim
20 words
The colored tire stock of claim 2 wherein said ionic crosslinking agent is a metal salt of a carboxylic acid.
Claim 11
Dependent Claim
16 words
The colored tire stock of claim 9 wherein said ionic crosslinking agent is a metal methacrylate.
Claim 12
Dependent Claim
27 words
The colored tire stock of claim 10 wherein said metal methacrylate is selected from the group consisting of aluminum trimethacrylate, calcium dimethacrylate, magnesium dimethacrylate and zinc dimethacrylate.
Claim 13
Dependent Claim
17 words
The colored tire stock of claim 2 wherein said ionic crosslinking agent is an inorganic metal salt.
Claim 14
Dependent Claim
16 words
The colored tire stock of claim 12 wherein said inorganic metal salt is a metal oxide.
Claim 15
Dependent Claim
25 words
The colored tire stock of claim 13 wherein said metal oxide is selected from the group consisting of zinc oxide, magnesium oxide and mixtures thereof.
Claim 16
Dependent Claim
20 words
The colored tire stock of claim 2 wherein said free radical generating covalent crosslinking agent is a peroxide crosslinking agent.
Claim 17
Dependent Claim
17 words
The colored tire stock of claim 15 wherein said peroxide crosslinking agent is bis-(t-butyl peroxy) diisopropyl benzene.
Claim 18
Dependent Claim
18 words
The colored tire stock of claim 1 wherein said colored tire stock is a colored sidewall tire stock.
Claim 19
Dependent Claim
19 words
The colored tire stock of claim 17 wherein said colored sidewall tire stock is a white sidewall tire stock.
Claim 20
Dependent Claim
18 words
The colored tire stock of claim 2 wherein said colored rubber composition is a white sidewall rubber composition.
References Cited (Backward Citations)
GB1091818A
Cited
US4804028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |