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US3935893A
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Self-sealing vehicle tire and sealant composition
Assignee: Rockcor Inc
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Filing: 1974-07-15
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Granted: 1976-02-03
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Expires: 1994-07-15
Abstract
Abstract A vehicle tire is disclosed having an internal circumferential layer of self-sealing composition on an internal surface, particularly behind the tire tread. The sealant layer is initially made up of the combination of specific quantities of a high molecular weight curable butyl rubber, a low molecular weight curable butyl rubber, a liquid polybutylene tackifier, a partially hydrogenated block copolymer of styrene and a conjugated diene, carbon black and suitable curing agents for the butyl rubber components. When cured, this sealant layer effectively heals most punctures one-quarter inch in diameter or less in a vehicle tire at temperatures over the range of about - 20 DEG F. to 270 DEG F. without significant loss of air.
Inventors
- 👤 Peter L. Stang
- 👤 Joel V. Van Ornum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:39
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0681; B29D30/0685; B29C; B29C73/00; B29C73/16; B29C73/163; B29C73/18; B29C73/20; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L53/00; C08L53/02; B29D2030/0686; B29D2030/0695; B29D2030/0697; B29L; B29L2030/00; Y; Y10; Y10S; Y10S428/00; Y10S428/912; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10666; Y10T152/10675; Y10T152/10684
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
A sealant composition for use in a vehicle tire to seal punctures therein up to about one-quarter inch in diameter formed in the operation of said tire, said composition consisting essentially of, by weight, 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6 to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general molecular configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a monovinyl arene polymer block and each B is a conjugated diene polymer block, and only said diene block(s) are hydrogenated, 5 to 17 parts carbon black, and small but suitable amounts of crosslinking agents suitable for curing butyl rubbers.
Claim 2
Dependent Claim
159 words
A sealant composition for use in a vehicle tire to seal punctures therein up to about one-quarter inch in diameter formed in the operation of said tire, said composition consisting essentially of, by weight, 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6 to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general molecular configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a monovinyl arene polymer block and each B is a conjugated diene polymer block, and only said diene block(s) are hydrogenated, 5 to 17 parts carbon black, and small but suitable amounts of crosslinking agents suitable for curing butyl rubbers.
Claim 3
Dependent Claim
184 words
A sealant composition for use in a vehicle tire to seal punctures therein up to about one-quarter inch in diameter formed in the operation of said tire, said composition consisting essentially of, by weight, 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6 to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general molecular configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a styrene polymer block and each B is a conjugated diene polymer block of a diene taken from the group consisting of butadiene and isoprene, and only said diene block(s) are hydrogenated, said copolymer having a molecular weight in the range of about 70,000 to 150,000, 5 to 17 parts carbon black, and small but suitable amounts of crosslinking agents suitable for curing butyl rubbers.
Claim 4
Dependent Claim
184 words
A sealant composition for use in a vehicle tire to seal punctures therein up to about one-quarter inch in diameter formed in the operation of said tire, said composition consisting essentially of, by weight, 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6 to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general molecular configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a styrene polymer block and each B is a conjugated diene polymer block of a diene taken from the group consisting of butadiene and isoprene, and only said diene block(s) are hydrogenated, said copolymer having a molecular weight in the range of about 70,000 to 150,000, 5 to 17 parts carbon black, and small but suitable amounts of crosslinking agents suitable for curing butyl rubbers.
Claim 5
Dependent Claim
146 words
A self-sealing rubber tire comprising a tread portion, a carcass portion and a self-sealing layer inside of said carcass portion, said self-sealing layer consisting essentially of, by weight, a cured composition formed from: 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6 to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general molecular configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a monovinyl arene polymer block and each B is a conjugated diene polymer block, and only said diene block(s) are hydrogenated, and 5 to 17 parts carbon black.
Claim 6
Dependent Claim
146 words
A self-sealing rubber tire comprising a tread portion, a carcass portion and a self-sealing layer inside of said carcass portion, said self-sealing layer consisting essentially of, by weight, a cured composition formed from: 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6 to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general molecular configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a monovinyl arene polymer block and each B is a conjugated diene polymer block, and only said diene block(s) are hydrogenated, and 5 to 17 parts carbon black.
Claim 7
Dependent Claim
169 words
A self-sealing rubber tire comprising a tread portion, a carcass portion and a self-sealing layer inside of said carcass portion, said self-sealing layer consisting essentially of, by weight, a cured composition formed from: 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a styrene polymer block and each B is a conjugated diene polymer block of a diene taken from the group consisting of butadiene and isoprene, and only said diene block(s) are hydrogenated, said copolymer having a molecular weight in the range of about 70,000 to 150,000, and 5 to 17 parts carbon black.
Claim 8
Dependent Claim
169 words
A self-sealing rubber tire comprising a tread portion, a carcass portion and a self-sealing layer inside of said carcass portion, said self-sealing layer consisting essentially of, by weight, a cured composition formed from: 10 to 15 parts of a butyl rubber having an average molecular weight in the range of about 100,000 to 300,000, 6to 10 parts of a butyl rubber having an average molecular weight in the range of about 10,000 to 30,000, 60 to 65 parts of a liquid polybutylene having an average molecular weight of about 500 to 5,000, 5 parts of a partially hydrogenated thermoplastic elastomeric block copolymer having the general configuration A-(B-A) 1 -5 wherein, prior to hydrogenation, each A is a styrene polymer block and each B is a conjugated diene polymer block of a diene taken from the group consisting of butadiene and isoprene, and only said diene block(s) are hydrogenated, said copolymer having a molecular weight in the range of about 70,000 to 150,000, and 5 to 17 parts carbon black.
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) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |