US3915943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire tread having low heat buildup
Assignee: Phillips Petroleum Co
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Filing: 1974-02-27
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Granted: 1975-10-28
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Expires: 1994-02-27
Abstract
Abstract Heat buildup in a tire-tread vulcanizate is reduced by admixing an aromatic monocarboxylic acid with the tread composition prior to vulcanization.
Inventors
- 👤 Roy F Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:32
CPC Classifications
B; B60; B60C; B60C1/00; B60C1/0016; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
A METHOD FOR REDUCING HEAT BUILDUP IN A TIRE-TREAD VULCANIZATE COMPRISING A SULFUR-VULCANIZABLE RUBBER WHICH COMPRISES ADMIXING WITH THE TIRE-TREAD STOCK PRIOR TO VULCANIZATION AN AROMATIC MONOCARBOXYLIC ACID HAVING FROM 7 TO 17 CARBON ATOMS PER MOLECULESELECTED FROM THEGROUP CONSISTING OF BENZOIC ACID AND SUBSTITUTED BENZOIC ACIDS HAVING FROM 1 TO 5 RING SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL, ARYL AND COMBINATIONS THEREOF, IN AN AMOUNT RANGING FROM 0.1 TO 10 PARTS OF SAID ACID PER HUNDRED PARTS OF SAID RUBBER.
Claim 2
Independent Claim
84 words
A METHOD FOR REDUCING HEAT BUILDUP IN A TIRE-TREAD VULCANIZATE COMPRISING A SULFUR-VULCANIZABLE RUBBER WHICH COMPRISES ADMIXING WITH THE TIRE-TREAD STOCK PRIOR TO VULCANIZATION AN AROMATIC MONOCARBOXYLIC ACID HAVING FROM 7 TO 17 CARBON ATOMS PER MOLECULESELECTED FROM THEGROUP CONSISTING OF BENZOIC ACID AND SUBSTITUTED BENZOIC ACIDS HAVING FROM 1 TO 5 RING SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL, ARYL AND COMBINATIONS THEREOF, IN AN AMOUNT RANGING FROM 0.1 TO 10 PARTS OF SAID ACID PER HUNDRED PARTS OF SAID RUBBER.
Claim 3
Dependent Claim
51 words
The method of claim 1 wherein said rubber is selected from the group consisting of homopolymers and copolymers of conjugated dienes having from 4 to 12 carbon atoms and copolymers of conjugated dienes having from 4 to 12 carbon atoms and monovinyl-substituted aromatic hydrocarbons having from 8 to 20 carbon atoms.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein said conjugated diene/monovinylsubstituted aromatic hydrocarbon copolymer contains at least 50 weight percent conjugated diene.
Claim 5
Dependent Claim
14 words
The method of claim 3 wherein said copolymer is formed from 1,3-butadiene and styrene.
Claim 6
Dependent Claim
12 words
The method of claim 4 wherein said copolymer is a random copolymer.
Claim 7
Dependent Claim
32 words
The method of claim 5 wherein said random copolymer is prepared by a solution polymerization process in the presence of a multifunctional organolithium initiator and in the presence of a randomizing agent.
Claim 8
Dependent Claim
13 words
The method of claim 6 wherein said aromatic monocarboxylic acid is benzoic acid.
Claim 9
Dependent Claim
29 words
The method of claim 1 wherein said aromatic monocarboxylic acid is present in an amount ranging from 1 to 3 parts by weight per 100 parts of said rubber.
Claim 10
Dependent Claim
72 words
A tire tread Comprising a sulfur-vulcanizable rubber and from 0.1 to 10 parts per 100 parts of said rubber of an aromatic monocarboxylic acid having from 7 to 17 carbon atoms per molecule selected from the group consisting of benzoic acid and substituted benzoic acids having 1 to 5 ring substituents selected from the group consisting of alkyl, cycloalkyl, aryl and combinations thereof, said tire tread being characterized by low heat buildup.
Claim 11
Dependent Claim
72 words
A tire tread Comprising a sulfur-vulcanizable rubber and from 0.1 to 10 parts per 100 parts of said rubber of an aromatic monocarboxylic acid having from 7 to 17 carbon atoms per molecule selected from the group consisting of benzoic acid and substituted benzoic acids having 1 to 5 ring substituents selected from the group consisting of alkyl, cycloalkyl, aryl and combinations thereof, said tire tread being characterized by low heat buildup.
Claim 12
Dependent Claim
80 words
A vulcanizable tire tread composition comprising a sulfur-vulcanizable rubber and from 0.1 to 10 parts per 100 parts of said rubber of an aromatic monocarboxylic acid having from 7 to 17 carbon atoms per molecule selected from the group consisting of benzoic acid and substituted benzoic acids having from 1 to 5 ring substituents selected from the group consisting of alkyl, cycloalkyl, aryl and combinations thereof, said composition being characterized by its exhibiting a low heat buildup profile when vulcanized.
Claim 13
Dependent Claim
80 words
A vulcanizable tire tread composition comprising a sulfur-vulcanizable rubber and from 0.1 to 10 parts per 100 parts of said rubber of an aromatic monocarboxylic acid having from 7 to 17 carbon atoms per molecule selected from the group consisting of benzoic acid and substituted benzoic acids having from 1 to 5 ring substituents selected from the group consisting of alkyl, cycloalkyl, aryl and combinations thereof, said composition being characterized by its exhibiting a low heat buildup profile when vulcanized.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |