US6060552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition containing modified polyisobutylene rubber
Assignee: Yokohama Rubber Co Ltd
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Filing: 1998-10-02
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Granted: 2000-05-09
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Expires: 2018-10-02
Abstract
Abstract A rubber composition containing a diene rubber and a modified polyisobutylene rubber having a functional group capable of reacting with a silanol group present on a surface of silica, together with a precipitated silica or a silica-adhered carbon black, having a tan δ at 60° C. of 0.2 or more.
Inventors
- 👤 Hiroyuki Kaido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:29
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
89 words
A rubber composition comprising 100 parts by weight of a starting rubber containing 95 to 60 parts by weight of a styrene-butadiene copolymer rubber, 5 to 30 parts by weight of a modified polyisobutylene rubber having a functional group capable of reacting with a silanol group present on a surface of silica, and optionally 0 to 20 parts by weight of another diene rubber and 5 to 100 parts by weight of precipitated silica, a tan δ at 60° C. of the composition after vulcanization being at least 0.2.
Claim 2
Dependent Claim
89 words
A rubber composition comprising 100 parts by weight of a starting rubber containing 95 to 60 parts by weight of a styrene-butadiene copolymer rubber, 5 to 30 parts by weight of a modified polyisobutylene rubber having a functional group capable of reacting with a silanol group present on a surface of silica, and optionally 0 to 20 parts by weight of another diene rubber and 5 to 100 parts by weight of precipitated silica, a tan δ at 60° C. of the composition after vulcanization being at least 0.2.
Claim 3
Dependent Claim
25 words
A rubber composition as claimed in claim 1, wherein the functional group of the modified polyisobutylene rubber is a halogen atom or an alkoxysilyl group.
Claim 4
Dependent Claim
23 words
A rubber composition as claimed in claim 1, wherein the modified polyisobutylene rubber is a modified copolymer of isobutylene and isoprene or p-methylstyrene.
Claim 5
Dependent Claim
25 words
A rubber composition as claimed in claim 1, wherein at least half of the starting styrene-butadiene copolymer rubber is an emulsion polymerized styrene-butadiene copolymer rubber.
Claim 6
Dependent Claim
29 words
A rubber composition as claimed in claim 1, wherein at least half of the starting styrene-butadiene copolymer rubber is one with a bound styrene content of at least 30%.
Claim 7
Dependent Claim
31 words
A rubber composition as claimed in claim 1, further comprising 0.1 to 10 parts by weight of a silane coupling agent based upon 100 parts by weight of the starting rubber.
Claim 8
Dependent Claim
24 words
A rubber composition as claimed in claim 1, wherein the starting rubber is composed of the styrene-butadiene copolymer rubber and the modified polyisobutylene rubber.
Claim 9
Dependent Claim
23 words
A rubber composition as claimed in claim 2, wherein the modified polyisobutylene rubber is a modified copolymer of isobutylene and isoprene or p-methylstyrene.
Claim 10
Dependent Claim
25 words
A rubber composition as claimed in claim 2, wherein at least half of the starting styrene-butadiene copolymer rubber is an emulsion polymerized styrene-butadiene copolymer rubber.
Claim 11
Dependent Claim
29 words
A rubber composition as claimed in claim 2, wherein at least half of the starting styrene-butadiene copolymer rubber is one with a bound styrene content of at least 30%.
Claim 12
Dependent Claim
31 words
A rubber composition as claimed in claim 2, further comprising 0.1 to 10 parts by weight of a silane coupling agent based upon 100 parts by weight of the starting rubber.
Claim 13
Dependent Claim
24 words
A rubber composition as claimed in claim 2, wherein the starting rubber is composed of the styrene-butadiene copolymer rubber and the modified polyisobutylene rubber.
Claim 14
Dependent Claim
29 words
A rubber composition comprising a modified polyisobutylene having a functional group capable of reacting with a silanol group present on a surface of silica and a silica-adhered carbon black.
Claim 15
Dependent Claim
29 words
A rubber composition comprising a modified polyisobutylene having a functional group capable of reacting with a silanol group present on a surface of silica and a silica-adhered carbon black.
Claim 16
Dependent Claim
33 words
A rubber composition as claimed in claim 13, where said modified polyisobutylene is an isoprene-isobutylene copolymer rubber having a halogen atom, an isobutylene-p-methylstyrene copolymer rubber having a halogen atom or a mixture thereof.
Claim 17
Dependent Claim
24 words
A rubber composition as claimed in claim 13, wherein the amount of silica of the silica-adhered carbon black is 0.1 to 25% by weight.
Claim 18
Dependent Claim
35 words
A rubber composition as claimed in claim 13, wherein, 100 parts by weight of a starting rubber comprises at least 5 parts by weight of the modified polyisobutylene and the remainder of a diene rubber.
Claim 19
Dependent Claim
26 words
A rubber composition as claimed in claim 13, wherein, as a reinforcing agent both said silica-adhered carbon black and another reinforcing agent are used in combination.
Claim 20
Dependent Claim
16 words
A rubber composition as claimed in claim 13, further comprising at least one silane coupling agent.
Claim 21
Dependent Claim
20 words
A rubber composition as claimed in claim 13, further comprising at least one polyalkylsiloxane and/or polysiloxane having an alkoxy group.
Claim 22
Dependent Claim
24 words
A rubber composition as claimed in claim 13, wherein a tan δ at 60° C. of the composition after vulcanization is at least 0.2.
References Cited (Backward Citations)
JPH04227741A
Cited
US5475051A
Cited
EP0682071A1
Cited
JPH07304903A
Cited
JPH08277347A
Cited
US5679728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-09 | 2003-11-08 | 2004-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-09 | 2007-11-08 | 2008-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-09 | 2011-11-08 | 2012-05-09 | $7700.00 | Window Closed / Lapsed |