US5807913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic rubber composition
Assignee: Nok Corp
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Filing: 1996-12-05
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Granted: 1998-09-15
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Expires: 2016-12-05
Abstract
Abstract An active halogen-containing acrylic rubber composition for molding oil filter-gaskets, which comprises an active halogen-containing acrylic rubber and a metal phosphonate represented by the following general formula: RR'nPO(OH)(OM) wherein R is an alkyl group having 1 to 32 carbon atoms, a polyfluorocarbon group or a perfluoropolyether group; R' is an alkylene group having 1 to 6 carbon atoms, a phenylene group, an oxyphenylene group or a sulfonamide group; M is an alkali metal; and n is 0 or 1, gives oil filter-gaskets having a distinguished durable protection against fixation without lowering of high temperature sealability, even if used in engine oil.
Inventors
- 👤 Kenji Mikuni
- 👤 Hisayuki Nagaoka
- 👤 Norio Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C09K2200/00; C09K2200/04; C09K2200/0417; C09K2200/0488; C09K2200/06; C09K2200/0615; C09K2200/0625
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets, which comprises an active halogen-containing acrylic rubber and a metal phosphonate represented by the following formula: RR'nPO(OH)(OM) wherein R is an alkyl group having 1 to 32 carbon atoms, a polyfluorocarbon group or a perfluoropolyether group; R' is an alkylene group having 1 to 6 carbon atoms, a phenylene group, an oxyphenylene group or a sulfonamide group; M is an alkali metal; and n is 0 or 1.
Claim 2
Dependent Claim
78 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets, which comprises an active halogen-containing acrylic rubber and a metal phosphonate represented by the following formula: RR'nPO(OH)(OM) wherein R is an alkyl group having 1 to 32 carbon atoms, a polyfluorocarbon group or a perfluoropolyether group; R' is an alkylene group having 1 to 6 carbon atoms, a phenylene group, an oxyphenylene group or a sulfonamide group; M is an alkali metal; and n is 0 or 1.
Claim 3
Dependent Claim
100 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 1, wherein the active halogen-containing acrylic rubber is a copolymer comprising alkyl acrylate with an alkyl group having 1 to 8 carbon atoms as the main component or a copolymer comprising alkyl acrylate with an alkyl group having 1 to 8 carbon atoms and alkoxyalkyl acrylate with an alkoxyalkyl group having 2 to 8 carbon atoms as the main components, further copolymerized with about 0.1 to about 10% by weight of an active halogen-containing monomer capable of forming a cross-linkable group on the basis of the copolymer.
Claim 4
Dependent Claim
77 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 2, wherein the active halogen-containing monomer is (1) vinyl-benzyl chloride, (2) vinyl chloroacetate or allyl chloro-acetate, (3) addition reaction products of a glycidyl compound with monochloroacetic acid or (4) alkenyl esters of α- or β-halogen-substituted aliphatic monocarboxylic acid, haloalkyl esters of acrylic acid or methacrylic acid, haloalkyl alkenyl esters, haloalkyl alkenyl ketones, haloacetoxyalkyl esters of acrylic acid or methacrylic acid or haloacetyl-containing unsaturated compounds.
Claim 5
Dependent Claim
31 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 1, wherein the active halogen-containing acrylic rubber has a glass transition temperature of not higher than -30° C.
Claim 6
Dependent Claim
40 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 1, wherein about 0.1 to about 20 parts by weight of the metal phosphonate is used per 100 parts by weight of the active halogen-containing acrylic rubber.
Claim 7
Dependent Claim
24 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 1, wherein trithiocyanuric acid is further contained as a cross-linking agent.
Claim 8
Dependent Claim
40 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 6, wherein about 0.1 to about 5 parts by weight of the trithiocyanuric acid is used per 100 parts by weight of the active halogen-containing acrylic rubber.
Claim 9
Dependent Claim
27 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 6, wherein a cross-linking promoter is used together with the trithiocyanuric acid cross-linking agent.
Claim 10
Dependent Claim
25 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 8, wherein the cross-linking promoter is a metal salt of dialkyldithiocarbamic acid.
Claim 11
Dependent Claim
25 words
An active halogen-containing acrylic rubber composition for molding oil filter-gaskets according to claim 9 wherein the metal salt of dialkyldithiocarbamic acid is a zinc salt.
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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) | 2001-09-14 | 2002-03-16 | 2002-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-14 | 2006-03-16 | 2006-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-14 | 2010-03-16 | 2010-09-15 | $7700.00 | Window Closed / Lapsed |