US4828923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber laminates of fluororubber and nitrile rubber
Assignee: Zeon Corp
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Filing: 1988-04-06
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Granted: 1989-05-09
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Expires: 2008-04-06
Abstract
Abstract Disclosed is a process for the preparation of rubber laminates. According to this process, a rubber laminate having a high bonding strength can be obtained by contacting an uncured composition A comprising a fluororubber and a metal oxide with an uncured composition B comprising a nitrile group-containing polymer rubber and a phosphonium salt represented by the following general formula: ##STR1## wherein R 1 , R 2 , R 3 and R 4 each stand for a hydrocarbon residue having 1 to 20 carbon atoms, which may be substituted, with the proviso that up to three of R 1 , R 2 , R 3 and R 4 may be a primary, secondary or tertiary amino group or a fluoroalkyl group, and R 5 stands for a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and curing the uncured compositions.
Inventors
- 👤 Takashi Nakagawa
- 👤 Osamu Sugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/042; B32B1/00; B32B1/08; B32B25/14; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/49; C08K5/50; B32B38/00; B32B2038/0052; B32B2038/0076; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
A rubber laminate prepared by preparation of rubber contacting an uncured composition A comprising a fluororubber and a metal oxide with an uncured composition B comprising a nitrile group-containing polymer rubber and a phosphonium salt represented by the following general formula: ##STR4## wherein R 1 , R 2 , R 3 and R 4 each stand for a hydrocarbon residue having 1 to 20 carbon atoms, which may be substituted, with the proviso that up to three of R 1 , R 2 , R 3 and R 4 may be a primary, secondary or tertiary amino group or a fluoroalkyl group, and R 5 stands for a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and curing the uncured compositions.
Claim 2
Dependent Claim
125 words
A rubber laminate prepared by preparation of rubber contacting an uncured composition A comprising a fluororubber and a metal oxide with an uncured composition B comprising a nitrile group-containing polymer rubber and a phosphonium salt represented by the following general formula: ##STR4## wherein R 1 , R 2 , R 3 and R 4 each stand for a hydrocarbon residue having 1 to 20 carbon atoms, which may be substituted, with the proviso that up to three of R 1 , R 2 , R 3 and R 4 may be a primary, secondary or tertiary amino group or a fluoroalkyl group, and R 5 stands for a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and curing the uncured compositions.
Claim 3
Dependent Claim
44 words
A rubber laminate according to claim 1, wherein the fluororubber is a rubber selected from the group consisting of homopolymer rubbers of fluorine-containing unsaturated monomers, copolymer rubbers of fluorine-containing unsaturated monomers and copolymer rubbers of fluorine-containing unsaturated monomers with other unsaturated monomers copolymerizable therewith.
Claim 4
Dependent Claim
29 words
A rubber laminate according to claim 1, wherein the fluororubber is a rubber selected from the group consisting of vinylidene fluoride/hexafluoropropene binary copolymer rubbers and vinylidene fluoride/hexafluoropropene/ tetrafluoroethylene terpolymers.
Claim 5
Dependent Claim
35 words
A rubber laminate according to claim 1, wherein the metal oxide is a compound selected from the group consisting of CaO, MgO, PbO, Pb 3 O 4 , BaO and Al 2 O 3 .
Claim 6
Dependent Claim
13 words
A rubber laminate according to claim 1, wherein the metal oxide is MgO.
Claim 7
Dependent Claim
36 words
A rubber laminate according to claim 1, wherein the metal oxide is incorporated in the uncured composition A in an amount of 1 to 30 parts by weight per 100 parts by weight of the fluororubber.
Claim 8
Dependent Claim
17 words
A rubber laminate according to claim 1, wherein the phosphonium salt is further incorporated in the fluororubber.
Claim 9
Dependent Claim
42 words
A rubber laminate according to claim 1, wherein the nitrile group-containing polymer rubber is a rubber selected from the group consisting of unsaturated nitrile/ conjugated diene copolymer rubbers, unsaturated nitrile/ conjugated diene/ethylenically unsaturated monomer terpolymer rubbers and unsaturated nitrile/ethylenically unsaturated copolymer rubbers.
Claim 10
Dependent Claim
28 words
A rubber laminate according to claim 1, wherein the nitrile group-containing polymer rubber is a nitrile group-containing, highly saturated polymer rubber having an iodine value smaller than 120.
Claim 11
Dependent Claim
71 words
A rubber laminate according to claim 9, wherein the nitrile group-containing, highly saturated polymer rubber is a copolymer rubber selected from the group consisting of a copolymer rubber formed by hydrogenating conjugated diene units of an unsaturated nitrile/conjugated diene copolymer rubber, an unsaturated nitrile/conjugated diene/ ethylenically unsaturated monomer terpolymer rubber, a copolymer rubber formed by hydrogenating conjugated diene units of said terpolymer rubber and an unsaturated nitrile/ethylenically unsaturated monomer copolymer rubber.
Claim 12
Dependent Claim
32 words
A rubber laminate according to claim 1, wherein the hydrocarbon residue is a group selected from the group consisting of alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups and substituted aryl groups.
Claim 13
Dependent Claim
39 words
A rubber laminate according to claim 1, wherein the phosphonium salt is incorporated in the incured composition B in an amount of 1 to 10 parts by weight per 100 parts by weight of the nitrile group-containing copolymer rubber.
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |