US4751277A
Expired / Lapsed
US
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Amino group-containing diene copolymer
Assignee: JSR Corp
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Filing: 1983-08-23
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Granted: 1988-06-14
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Expires: 2003-08-23
Abstract
Abstract zs An amino group-containing copolymer which is composed of (A) butadiene, isoprene or both of them, (B) acrylonitrile and (C) a (meth)acrylate represented by the general formula (I): ##STR1## wherein R is H or CH 3 , R 1 and R 2 are independently alkyl groups having 2 to 8 carbon atoms, and X is an alkylene group having 2 to 4 carbon atoms, and has a polymer composition (weight %) of (A):(B):(C) of 30 to 89.9:10 to 50:0.1 to 20. Said multi-component copolymer is used as oil-resistant rubber, and is particularly excellent in resistance to growth of crack by solvent.
Inventors
- 👤 Eitaro Okuya
- 👤 Hiroji Enyo
- 👤 Shin-ichiro Iwanama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:18
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
An amino-group containing diene copolymer comprising, as the monomer units constituting the copolymer, (A) 30 to 89.9 weight percent of butadiene, isoprene or both of them, (B) 10 to 50 weight percent of acrylonitrile and (C) 6 to 11 weight percent of a (meth)acrylate represented by the general formula (I): ##STR4## wherein R is H or CH 3 , R 1 and R 2 are independently alkyl groups having 2 to 8 carbon atoms, and X is an alkylene group having 2 to 4 carbon atoms.
Claim 2
Dependent Claim
86 words
An amino-group containing diene copolymer comprising, as the monomer units constituting the copolymer, (A) 30 to 89.9 weight percent of butadiene, isoprene or both of them, (B) 10 to 50 weight percent of acrylonitrile and (C) 6 to 11 weight percent of a (meth)acrylate represented by the general formula (I): ##STR4## wherein R is H or CH 3 , R 1 and R 2 are independently alkyl groups having 2 to 8 carbon atoms, and X is an alkylene group having 2 to 4 carbon atoms.
Claim 3
Dependent Claim
38 words
An amino group-containing diene copolymer according to claim 1, wherein the (meth)acrylate of the constituent (C) is selected from the group consisting of diethylaminoethyl acrylate, diethylaminoethyl methacrylate, dibutylaminoethyl methacrylate, dibutylaminopropyl methacrylate, diethylaminobutyl methacrylate, dihexylaminoethyl methacrylate and dioctylaminoethyl methacrylate.
Claim 4
Dependent Claim
44 words
An amino group-containing diene copolymer according to claim 1, wherein the constituent (C) is a methacrylate represented by the general formula (I) in which R is a methyl group and R 1 and R 2 are alkyl groups having 2 to 4 carbon atoms.
Claim 5
Dependent Claim
22 words
An amino group-containing diene copolymer according to claim 1, wherein the proportion of the constituent (A) is 50 to 80 weight percent.
Claim 6
Dependent Claim
22 words
An amino group-containing diene copolymer according to claim 1, wherein the proportion of the constituent (B) is 20 to 45 weight percent.
Claim 7
Dependent Claim
15 words
An amino group-containing diene copolymer according to claim 1, wherein the constituent (A) is butadiene.
Claim 8
Dependent Claim
15 words
An amino group-containing diene copolymer according to claim 2, wherein the constituent (A) is butadiene.
Claim 9
Dependent Claim
15 words
An amino group-containing diene copolymer according to claim 3, wherein the constituent (A) is butadiene.
Claim 10
Dependent Claim
16 words
An amino group-containing diene copolymer according to claim 6, wherein the constituent (C) is diethylaminoethyl methacrylate.
Claim 11
Independent Claim
130 words
A method for producing an amino group-containing copolymer which comprises emulsion-polymerizing (A) butadiene, isoprene or both of them, (B) acrylonitrile and (C) a (meth)acrylate represented by the general formula (I): ##STR5## wherein R is H or CH 3 , R 1 and R 2 are independently alkyl groups having 2 to 8 carbon atoms, and X is an alkylene group having 2 to 4 carbon atoms, in the presence of a polymerization initiator, an emulsifier and a molecular weight modifier at a temperature of 0° to 50° C., the proportions of (A), (B) and (C) being so selected that the copolymer contains 30 to 89.9 weight percent of monomer units (A), 10 to 50 weight percent of monomer units (B) and 6 to 11 weight percent of monomer units (C).
Claim 12
Independent Claim
130 words
A method for producing an amino group-containing copolymer which comprises emulsion-polymerizing (A) butadiene, isoprene or both of them, (B) acrylonitrile and (C) a (meth)acrylate represented by the general formula (I): ##STR5## wherein R is H or CH 3 , R 1 and R 2 are independently alkyl groups having 2 to 8 carbon atoms, and X is an alkylene group having 2 to 4 carbon atoms, in the presence of a polymerization initiator, an emulsifier and a molecular weight modifier at a temperature of 0° to 50° C., the proportions of (A), (B) and (C) being so selected that the copolymer contains 30 to 89.9 weight percent of monomer units (A), 10 to 50 weight percent of monomer units (B) and 6 to 11 weight percent of monomer units (C).
References Cited (Backward Citations)
US3904580A
Cited
US4052542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |