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Patent US4129708A successfully refreshed from Google Patents.
US4129708A
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Polyacrylate elastomer compositions
Assignee: Enichem Elastomeri SpA
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Filing: 1977-10-07
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Granted: 1978-12-12
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Expires: 1997-10-07
Abstract
Abstract A vulcanizable polyacrylate elastomer composition having improved resistance to hydrocarbon oils is provided which comprises one or more lower alkyl acrylic acid ester monomers polymerized with a comonomer containing either a halogen or an epoxy group, in the presence of from about 0.25 to 10 percent, by weight of total monomer, of a low molecular weight, unsaturated polymer of butadiene or isoprene or copolymers thereof with styrene or acrylonitrile. In addition, a process for preparing such elastomer compositions is also provided, together with the vulcanization of such elastomers and the resulting vulcanized polyacrylate.
Inventors
- 👤 Guido Mino
- 👤 Rudolf A. Behrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:05
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
A vulcanizable polyacrylate elastomer composition having improved resistance to hydrocarbon oils which comprises one or more lower alkyl acrylic acid ester monomers copolymerized with a monomer selected from the group consisting of β-chloroethyl vinyl ether, vinyl chloroacetate, β-chloroethyl acrylate, allyl glycidyl ether, glycidyl methacrylate and compounds having the formulae ##STR4## in the presence of from about 0.25 to 10 percent, by weight, of total monomer, of a liquid unsaturated, hydroxyl or aromatic hydrocarbon terminated homopolymer of butadiene or isoprene, or copolymers thereof with minor amounts of styrene or acrylonitrile, having a monomeric weight of from about 500 to 4,000 and containing from about 75% to 99% unsaturation, based on the monomeric butadiene or isoprene in the polymer.
Claim 2
Dependent Claim
117 words
A vulcanizable polyacrylate elastomer composition having improved resistance to hydrocarbon oils which comprises one or more lower alkyl acrylic acid ester monomers copolymerized with a monomer selected from the group consisting of β-chloroethyl vinyl ether, vinyl chloroacetate, β-chloroethyl acrylate, allyl glycidyl ether, glycidyl methacrylate and compounds having the formulae ##STR4## in the presence of from about 0.25 to 10 percent, by weight, of total monomer, of a liquid unsaturated, hydroxyl or aromatic hydrocarbon terminated homopolymer of butadiene or isoprene, or copolymers thereof with minor amounts of styrene or acrylonitrile, having a monomeric weight of from about 500 to 4,000 and containing from about 75% to 99% unsaturation, based on the monomeric butadiene or isoprene in the polymer.
Claim 3
Dependent Claim
14 words
A composition according to claim 1 wherein the low molecular weight polymer is polybutadiene.
Claim 4
Dependent Claim
14 words
a composition according to claim 1 wherein the low molecular weight polymer is polyisoprene.
Claim 5
Dependent Claim
26 words
A composition according to claim 1 wherein the low molecular weight polymer comprises a major proportion of butadiene and a minor proportion of acrylonitrile or styrene.
Claim 6
Dependent Claim
28 words
A composition according to claim 1 wherein the acrylic acid ester monomer is a lower alkyl acrylate containing from 1 to 8 carbon atoms in the alkyl group.
Claim 7
Dependent Claim
48 words
A composition according to claim 1 which comprises in addition to at least one or more lower alkyl acrylic acid esters a monomer which is an alkoxyethyl acrylate or an alkylthioethyl acrylate having the general formula: ##STR5## wherein R is lower alkyl and X is oxygen or sulfur.
Claim 8
Dependent Claim
60 words
A composition according to claim 1 which comprises in addition to at least one or more lower alkyl acrylic acid esters a monomer which is a cyanoalkyl acrylate or a cyanoalkoxyalkyl acrylate having the general formulae: ##STR6## wherein R is a straight or branched chain alkylene radical containing from 2 to 8 carbon atoms and X is oxygen or sulfur.
Claim 9
Dependent Claim
22 words
A composition according to claim 1 wherein the halogen or epoxy containing comonomer comprises a minor proprotion of the total monomer mixture.
Claim 10
Dependent Claim
26 words
A composition according to claim 1 wherein the halogen or epoxy containing comonomer comprises up to about 10 percent by weight of the total monomer mixture.
Claim 11
Dependent Claim
41 words
A composition according to claim 1 wherein the total monomer comprises ethyl acrylate with vinyl chloroacetate, a mixture of ethyl and butyl acrylate with vinyl chloroacetate or mixtures of ethyl acrylate, butyl acrylate and methoxy or ethoxy-ethyl acrylate with vinyl chloroacetate.
Claim 12
Dependent Claim
102 words
A method for preparing the vulcanizable polyacrylate elastomer of claim 1 which comprises polymerizing an ester of an acrylic acid with a comonomer selected from the group consisting of β-chloroethyl vinyl ether, vinyl chloroacetate, β-chloroethyl acrylate, allyl glycidyl ether, glycidyl methacrylate and compounds having the formulae ##STR7## in the presence of a liquid unsaturated, hydroxyl or aromatic hydrocarbon terminated homopolymer of butadiene or isoprene, or copolymers thereof with minor amounts of styrene or acrylonitrile, having a monomeric weight of from about 500 to 4,000 and containing from about 75% to 99% unsaturation, based on the monomeric butadiene or isoprene in the polymer.
Claim 13
Dependent Claim
13 words
A method according to claim 11 wherein the polymerization technique is emulsion polymerization.
Claim 14
Dependent Claim
13 words
A method according to claim 11 wherein the polymerization technique is suspension polymerization.
Claim 15
Dependent Claim
26 words
A method according to claim 11 wherein polymerization is conducted in the presence of a conventional free radical cayalyst in an amount sufficient to catalyze polymerization.
Claim 16
Dependent Claim
16 words
A method according to claim 14 wherein the catalyst is benzoyl peroxide, dicumyl peroxide or azobisisobutyronitrile.
Claim 17
Dependent Claim
25 words
A method according to claim 11 wherein polymerization is conducted in the presence of a redox catalyst system in an amount sufficient to catalyze polymerization.
Claim 18
Dependent Claim
12 words
A method according to claim 11 wherein the resulting polymer is vulcanized.
Claim 19
Dependent Claim
18 words
A vulcanized polyacrylate elastomer having improved resistance to hydrocarbon oils prepared according to the process of claim 17.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |