Patent US4912186A successfully refreshed from Google Patents.
US4912186A
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Acrylic rubber, acrylic rubber composition and cured rubber article thereof
Assignee: JSR Corp
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Filing: 1988-08-25
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Granted: 1990-03-27
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Expires: 2008-08-25
Abstract
Abstract An acrylic rubber obtainable by copolymerizing a monomer mixture of: (A) 70 to 99.99% by weight of at least one compound selected from the group consisting of alkyl acrylates and alkoxyalkyl acrylates, (B) 0.01 to 10% by weight of at least one compound represented by the general formula: ##STR1## wherein R 1 is a hydrogen atom or a methyl group; X is a hydrogen atom, --COOR 6 (R 6 is an alkyl group having 1-10 carbon atoms or an alkoxyalkyl group having 2-14 carbon atoms), or ##STR2## R 2 , R 3 and R 4 are independently hydrogen atoms or groups having 1-10 carbon atoms whose carbon atom adjacent to C═C has no hydrogen; R 5 is a group having 1-10 carbon atoms whose carbon atom adjacent to C═C has no hydrogen; Y is ##STR3## or --O--; and n is 1 or 0, and (C) 0-20% by weight of at least one compound selected from the group consisting of other unsaturated compounds of the vinyl type, vinylidene type and vinylene type, in the presence of a radical polymerization initiator. Said acrylic rubber, when crosslinked with a crosslinking agent, gives a cured article having good heat resistance and a good compression set property and accordingly suitable for use as a hose or a sealing material.
Inventors
- 👤 Toshio Ohhara
- 👤 Yukihiro Sawada
- 👤 Hiroshi Ise
- 👤 Toshio Miyabayashi
- 👤 Hiroji Enyo
- 👤 Hozumi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:21
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/26; C08F220/28; C08F220/281
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
175 words
An acrylic rubber obtained by copolymerizing a monomer mixture of: (A) 70 to 99.99% by weight of at least one compound selected from the group consisting of alkyl acrylates and alkoxyalkyl acrylates, (B) 0.01 to 10% by weight of at least one compound represented by the general formula: ##STR11## wherein R 1 is a hydrogen atom or a methyl group; X is a hydrogen atom, --COOR 6 (R 6 is an alkyl group having 1-10 carbon atoms or an alkoxyalkyl group having 2-14 carbon atoms), or ##STR12## R 2 , R 3 and R 4 are independently hydrogen atoms or groups having 1-10 carbon atoms whose carbon atom adjacent to C═C has no hydrogen; R 5 is a group having 1-10 carbon atoms whose carbon atom adjacent to C═C has no hydrogen; Y is ##STR13## or --O--; and n is 1 or 0, and (C) 0-20% by weight of at least one other compound selected from the group consisting of vinyl compound, vinylidene compound and vinylene compound, in the presence of a radical polymerization initiator.
Claim 2
Dependent Claim
175 words
An acrylic rubber obtained by copolymerizing a monomer mixture of: (A) 70 to 99.99% by weight of at least one compound selected from the group consisting of alkyl acrylates and alkoxyalkyl acrylates, (B) 0.01 to 10% by weight of at least one compound represented by the general formula: ##STR11## wherein R 1 is a hydrogen atom or a methyl group; X is a hydrogen atom, --COOR 6 (R 6 is an alkyl group having 1-10 carbon atoms or an alkoxyalkyl group having 2-14 carbon atoms), or ##STR12## R 2 , R 3 and R 4 are independently hydrogen atoms or groups having 1-10 carbon atoms whose carbon atom adjacent to C═C has no hydrogen; R 5 is a group having 1-10 carbon atoms whose carbon atom adjacent to C═C has no hydrogen; Y is ##STR13## or --O--; and n is 1 or 0, and (C) 0-20% by weight of at least one other compound selected from the group consisting of vinyl compound, vinylidene compound and vinylene compound, in the presence of a radical polymerization initiator.
Claim 3
Dependent Claim
45 words
The acrylic rubber according to claim 1, wherein the component (A) is selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, pentyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, dodecyl acrylate, cyanoethyl acrylate, methoxyethyl acrylate, ethoxyethyl acrylate, butoxyethyl acrylate and ethoxypropyl acrylate.
Claim 4
Dependent Claim
20 words
The acrylic rubber according to claim 1, wherein the component (A) is used in a proportion of 80-99.90% by weight.
Claim 5
Dependent Claim
70 words
The acrylic rubber according to claim 1, wherein the component (B) is at least one compound represented by the general formula: ##STR14## wherein R 1 , R 4 , R 5 and Y have the same meanings as defined in claim 1, and X 1 is a hydrogen atom, --COOR 6 (R 6 has the same meaning as defined in claim 1), --Y--CH═CH--R 4 or --Y--R 5 --CH═CH--R 4 .
Claim 6
Dependent Claim
51 words
The acrylic rubber according to claim 1, wherein the component (B) is at least one compound selected from the group consisting of vinyl methacrylate, vinyl acrylate, 1,1-dimethylpropenyl methacrylate, 1,1-dimethylpropenyl acrylate, 3,3-dimethylbutenyl methacrylate, 3,3-dimethylbutenyl acrylate, divinyl itaconate, divinyl maleate, divinyl fumarate, vinyl 1,1-dimethylpropenyl ether, vinyl 3,3-dimethylbutenyl ether, 1-acryloyloxy-1-phenylethene, 1-acryloyloxy-2-phenylethene, 1-methacryloyloxy-1-phenylethene and 1-methacryloyloxy-2-phenylethene.
Claim 7
Dependent Claim
17 words
The acrylic rubber according to claim 1, wherein the component (B) is vinyl methacrylate or vinyl acrylate.
Claim 8
Dependent Claim
19 words
The acrylic rubber according to claim 1, wherein the component (B) is used in a proportion 0.1-5% by weight.
Claim 9
Dependent Claim
65 words
The acrylic rubber according to claim 1, wherein the component (C) is at least one compound selected from the group consisting of styrene, vinyltoluene, alphamethylstyrene, vinylnaphthalene, halogenated styrenes, acrylonitrile, methacrylonitrile, acrylamide, N-methylolacrylamide, vinyl acetate, vinyl chloride, vinylidene chloride, divinylbenzene, cyclohexyl acrylate, benzyl acrylate, ethylene glycol dimethacrylate, methacrylic acid, itaconic acid, fumaric acid and maleic acid and is used in a proportion of 0.01-20% by weight.
Claim 10
Dependent Claim
19 words
The acrylic rubber according to claim 1, wherein the radical polymerization initiator is a peroxide or an azo compound.
Claim 11
Dependent Claim
29 words
The acrylic rubber according to claim 9, wherein the radical polymerization initiator is used in a proportion of 0.001-1.0% by weight based on the weight of the monomer mixture.
Claim 12
Dependent Claim
18 words
The acrylic rubber according to claim 10, wherein the polymerization is conducted at 0°-80° C. for 0.01-30 hours.
Claim 13
Dependent Claim
16 words
An acrylic rubber composition essentially comprising the acrylic rubber of claim 1 and a crosslinking agent.
Claim 14
Dependent Claim
43 words
The acrylic rubber composition according to claim 12, wherein the crosslinking agent is sulfur, a sulfur-containing organic compound, an organic peroxide, a resin, a quinone derivative, a polyhalide, a bis(dioxotriazoline) derivative, an aldehyde, an epoxy compound, an amine-borane complex or a dipolar compound.
Claim 15
Dependent Claim
22 words
The acrylic rubber composition according to claim 12, wherein the crosslinking agent is sulfur, a sulfur-containing organic compound or an organic peroxide.
Claim 16
Dependent Claim
16 words
The acrylic rubber composition according to claim 12, wherein the crosslinking agent is an organic peroxide.
Claim 17
Dependent Claim
31 words
The acrylic rubber composition according to claim 12, wherein the crosslinking agent is used in a proportion of 0.1-20 parts by weight per 100 parts by weight of the acrylic rubber.
Claim 18
Dependent Claim
14 words
The acrylic rubber composition according to claim 12, which further comprises a crosslinking co-agent.
Claim 19
Dependent Claim
31 words
The acrylic rubber composition according to claim 17, wherein the crosslinking co-agent is contained in a proportion of 1-10 parts by weight per 100 parts by weight of the acrylic rubber.
Claim 20
Dependent Claim
19 words
The acrylic rubber composition according to claim 13, which further comprises conventional compounding agents other than the crosslinking agent.
Claim 21
Dependent Claim
22 words
The acrylic rubber composition according to claim 13, which further comprises a polymer which can be crosslinked with the same crosslinking agent.
Claim 22
Dependent Claim
51 words
The acrylic rubber composition according to claim 20, wherein the polymer is at least one member selected from the group consisting of an ethylene-propylene rubber, an acrylonitrile-butadiene rubber, an epichlorohydrin rubber, an isoprene rubber, natural rubber, a styrene-butadiene rubber, a butadiene rubber, a fluororubber, a chloroprene rubber and other acrylic rubbers.
Claim 23
Dependent Claim
11 words
A cured article of the acrylic rubber composition of claim 13.
Claim 24
Dependent Claim
15 words
The cured article according to claim 22, which is in the form of a hose.
Claim 25
Dependent Claim
16 words
The cured article according to claim 22, which is in the form of a sealing material.
References Cited (Backward Citations)
JPS54127494A
Cited
US4248985A
Cited
US4228265A
Cited
JPS6084310A
Cited
JPS6144909A
Cited
JPS6157843A
Cited
JPS6264809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |