US6525110B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane-containing rubber composition
Assignee: Yokohama Rubber Co Ltd
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Filing: 2000-11-16
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Granted: 2003-02-25
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Expires: 2020-11-16
Abstract
Abstract A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000:wherein, R1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.
Inventors
- 👤 Fumito Yatsuyanagi
- 👤 Kazunori Ishikawa
- 👤 Yoshiaki Hashimura
- 👤 Tetsuji Kawazura
- 👤 Hiroyuki Kaido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:20
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04; C08K9/06; C08K9/08; C08L; C08L21/00; C08L7/00; C08L9/00; C08L9/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
157 words
A rubber composition comprising: (i) 100 parts by weight of at least one rubber selected from the group consisting of natural rubber, polyisoprene rubber, styrenebutadiene copolymer rubber, polybutadiene rubber, acrylonitrilebutadiene copolymer rubber, butyl rubber, a diene rubber and ethylene-propylene copolymer rubber; (ii) from 5 to 100 parts by weight of a polysiloxane surface-treated silica comprising (a) 100 parts by weight of silica surface treated by (b) 0.1-50 parts by weight of a polysiloxane having a repeating unit of the formula (III): wherein R 3 independently represents a methyl group, an ethyl group, or a phenyl group, R 4 independently represents hydrogen or an organic group, R 5 independently represents an alkyl group or acyl group, m is 0 or an integer of 1 or more, and n is an integer of 1 or more; and (iii) a sulfur-containing silane coupling agent in an amount of from 0.5-40% by weight based on the total amount of the silica.
Claim 2
Dependent Claim
157 words
A rubber composition comprising: (i) 100 parts by weight of at least one rubber selected from the group consisting of natural rubber, polyisoprene rubber, styrenebutadiene copolymer rubber, polybutadiene rubber, acrylonitrilebutadiene copolymer rubber, butyl rubber, a diene rubber and ethylene-propylene copolymer rubber; (ii) from 5 to 100 parts by weight of a polysiloxane surface-treated silica comprising (a) 100 parts by weight of silica surface treated by (b) 0.1-50 parts by weight of a polysiloxane having a repeating unit of the formula (III): wherein R 3 independently represents a methyl group, an ethyl group, or a phenyl group, R 4 independently represents hydrogen or an organic group, R 5 independently represents an alkyl group or acyl group, m is 0 or an integer of 1 or more, and n is an integer of 1 or more; and (iii) a sulfur-containing silane coupling agent in an amount of from 0.5-40% by weight based on the total amount of the silica.
Claim 3
Dependent Claim
27 words
The rubber composition of claim 1 , wherein said sulfur-containing silane coupling agent is selected from the group consisting of bis-[3-(triethoxysilica)-propyl]tetrasulfide, bis-[3-(triethoxysilyl)propyl]-tetrasulfide, 3-trimethoxysilypropyl-N,N-dimethylthiocarbamoyltetrasulfide, trimethoxysilyl-mercaptobenz-thiazoletetrasulfide, triethoxysilylpropyl-methacrylatemonosulfide and dimethoxymethylsilylpropyl-N,N-dimethylthiocarbamoyl-tetrasulfide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-02-24 | 2006-08-26 | 2007-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-24 | 2010-08-26 | 2011-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-24 | 2014-08-26 | 2015-02-25 | $7700.00 | Window Closed / Lapsed |