US5010137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition, and oil seal and rubber hose obtained therefrom
Assignee: JSR Corp
•
Filing: 1988-02-16
•
Granted: 1991-04-23
•
Expires: 2008-02-16
Abstract
Abstract A rubber composition obtained by compounding (B) from 0.005 to 50 parts by weight of an polyorganohydrogensiloxane and (C) from 0.00001 to 1 part by weight of a compound of a transition metal belonging to the group VIII with (A) 100 parts by weight of a rubber-forming polymer mainly comprising (I) from 3 to 70% by weight of a polyorganosiloxane represented by the formula: ##EQU1## wherein R represents a substituted or unsubstituted monovalent organic group, 0.02 to 10 mole % of which being a vinyl group; and a represents a number of from 1.900 to 2.004, and having a degree of polymerization of from 500 to 10,000 and (II) from 30 to 97% by weight of organic rubber, and subjecting the resulting compound to hydrosilylation while effecting shear deformation. The rubber composition is excellent in roll processing properties, mechanical strength, heat resistance, and low-temperature property and is suitable as oil seal and rubber hose.
Inventors
- 👤 Itsuki Umeda
- 👤 Masaaki Takashima
- 👤 Yoshiaki Zama
- 👤 Yasuhiko Takemura
- 👤 Yuichi Funabashi
- 👤 Junichiro Watanabe
- 👤 Kiyoshi Takeda
- 👤 Makoto Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:16
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/02; C08K3/06; C08K3/18; C08K3/24; C08K3/26; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/09; C08K5/14; C08L15/00; C08L21/00; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L71/00; C08L71/02; C08L71/03; C08L83/00; C08L83/04; C08L9/00; C08L9/02; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20; C08L2205/00; C08L2205/03; C08L2312/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A rubber composition obtained by compounding (B) from 0.005 to 50 parts by weight of an polyorgano-hydrogensiloxane and (C) from 0.00001 to 1 part by weight of a compound of a transition metal belonging to the group VIII with (A) 100 parts by weight of a rubber-forming polymer mainly comprising (I) from 3 to 70% by weight of a polyorganosiloxane represented by the formula: ##EQU3## wherein R represents a substituted or unsubstituted monovalent organic group, 0.02 to 10 mole % of which being a vinyl group; and a represents a number of from 1.900 to 2.004, and having a polymerization degree of from 500 to 10,000 and (II) from 30 to 97% by weight of organic rubber other than (I), and subjecting the resulting composition to hydrosilylation while effecting shear deformation, wherein said composition further comprises a different cross-linking agent for the organic rubber, in addition to component (B), subsequently added.
Claim 2
Dependent Claim
151 words
A rubber composition obtained by compounding (B) from 0.005 to 50 parts by weight of an polyorgano-hydrogensiloxane and (C) from 0.00001 to 1 part by weight of a compound of a transition metal belonging to the group VIII with (A) 100 parts by weight of a rubber-forming polymer mainly comprising (I) from 3 to 70% by weight of a polyorganosiloxane represented by the formula: ##EQU3## wherein R represents a substituted or unsubstituted monovalent organic group, 0.02 to 10 mole % of which being a vinyl group; and a represents a number of from 1.900 to 2.004, and having a polymerization degree of from 500 to 10,000 and (II) from 30 to 97% by weight of organic rubber other than (I), and subjecting the resulting composition to hydrosilylation while effecting shear deformation, wherein said composition further comprises a different cross-linking agent for the organic rubber, in addition to component (B), subsequently added.
Claim 3
Dependent Claim
26 words
A rubber composition as claimed in claim 1, wherein said organic rubber has a Mooney viscosity (ML 1+4 , 100° C.) of from 10 to 200.
Claim 4
Dependent Claim
41 words
A rubber composition as claimed in claim 1 or 2, wherein said organic rubber is selected from the group consisting of an acrylic rubber, an ethylene-α-olefin rubber, an acrylonitrile-butadiene rubber, a fluorinated hydrocarbon rubber, an epichlorohydrin rubber, and a chlorosulfonated polyethylene.
Claim 5
Dependent Claim
16 words
A rubber composition as claimed in claim 1, wherein said organic rubber is an acrylic rubber.
Claim 6
Dependent Claim
168 words
A rubber composition as claimed in claim 1, wherein said organic rubber comprises a mixture of from 50 to 95% by weight of (II-a) an acrylic rubber having an epoxy group, a halogen atom, a carboxyl group or a crosslinkable group represented by formula (i): ##STR13## wherein R 1 , R 2 , and R 3 each represents a hydrogen atom or a monovalent or divalent organic group, and from 5 to 50% by weight of (II-b) an acrylic rubber other than said acrylic rubber (II-a) having a crosslinkable group represented by formula (ii): ##STR14## wherein R 4 represents a methylene group, --O--, --S--, ##STR15## or --NH--; R represents a substituted or unsubstituted monovalent organic group, and R 5 , R 6 , and R 7 each represents a hydrogen atom or a mono-, di- or trivalent organic group, and at least two of R 5 , R 6 , and R 7 are hydrogen atoms, based on the total amount of said acrylic rubbers (II-a) and (II-b).
Claim 7
Dependent Claim
17 words
A rubber composition as claimed in claim 1, wherein said transition metal compound is a platinum compound.
Claim 8
Dependent Claim
13 words
An oil seal obtained from the rubber composition as claimed in claim 1.
Claim 9
Dependent Claim
13 words
A rubber hose obtained from the rubber component as claimed in claim 1.
References Cited (Backward Citations)
US3069378A
Cited
US3021191A
Cited
US3227777A
Cited
US3288879A
Cited
US3433760A
Cited
US3969308A
Cited
US4139519A
Cited
US4150010A
Cited
JPS5424955A
Cited
US4201698A
Cited
GB2019417A
Cited
US4234702A
Cited
GB2019413A
Cited
JPS557814A
Cited
JPS5571737A
Cited
US4303572A
Cited
JPS5676441A
Cited
US4376184A
Cited
JPS56135584A
Cited
JPS57195757A
Cited
DE3314355A1
Cited
JPS60195149A
Cited
JPS6142541A
Cited
US4714734A
Cited
WO1987002996A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |