Patent US5194540A successfully refreshed from Google Patents.
US5194540A
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Process for producing acrylic elastomer
Assignee: Nippon Mektron KK
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Filing: 1992-07-11
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Granted: 1993-03-16
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Expires: 2012-07-11
Abstract
Abstract An acrylic elastomer capable of giving a vulcanization product having a distinguished tensile strength and a good stretching even by cross-linking with an organic peroxide can be obtained by using an organic peroxide having a non-conjugated double bond as a polymerization initiator in polymerization of at least one of (a) alkyl acrylates having an alkyl group of 1 to 8 carbon atoms and (b) alkoxyalkyl acrylates having an alkoxyalkyl grouop of 2 to 8 carbon atoms.
Inventors
- 👤 Yuichi Yamamoto
- 👤 Kazuma Yokoi
- 👤 Haruyoshi Tatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:22
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1802
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A process which comprises polymerizing an alkyl acrylate having an alkyl group of 1 to 8 carbon atoms and an alkoxyalkyl acrylate having an alkoxylalkyl group of 2 to 8 carbon atoms as polymerizable monomers with an organic peroxide having a non-conjugated double bond as a polymerization initiator, which peroxide is a compound represented by the following formula ##STR5## wherein R 1 and R 2 are a hydrogen atom or a methyl group and R 3 is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.
Claim 2
Dependent Claim
90 words
A process which comprises polymerizing an alkyl acrylate having an alkyl group of 1 to 8 carbon atoms and an alkoxyalkyl acrylate having an alkoxylalkyl group of 2 to 8 carbon atoms as polymerizable monomers with an organic peroxide having a non-conjugated double bond as a polymerization initiator, which peroxide is a compound represented by the following formula ##STR5## wherein R 1 and R 2 are a hydrogen atom or a methyl group and R 3 is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.
Claim 3
Dependent Claim
34 words
A process according to claim 1, wherein an organic mercapto or organic sulfide compound having a double bond is used as a molecular weight-controlling agent together with said organic peroxide as a polymerization initiator.
Claim 4
Dependent Claim
35 words
A process according to claim 2 wherein said organic mercapto compound is a compound having the formula: R.sub.1 CH═CR.sub.2 CH.sub.2 SH wherein R 1 and R 2 are a hydrogen atom or a methyl group.
Claim 5
Dependent Claim
14 words
A process according to claim 2 wherein said organic mercapto compound is dihydrodicyclopentenyl mercaptan.
Claim 6
Dependent Claim
35 words
A process according to claim 2 wherein said organic sulfide compound is a compound having the formula: (R.sub.1 CH═CR.sub.2 CH.sub.2 S).sub.2 wherein R 1 and R 2 are a hydrogen atom or a methyl group.
Claim 7
Dependent Claim
14 words
A process according to claim 2 wherein said organic sulfide compound is dihydrodicyclopentenyl disulfide.
Claim 8
Dependent Claim
33 words
A process according to claim 2 wherein said organic mercapto or organic sulfide compound is used in an amount of not more than 5% by weight on the basis of the polymerizable monomers.
Claim 9
Dependent Claim
34 words
A process according to claim 2 wherein said organic mercapto or organic sulfide compound is used in an amount of about 0.001 to about 1% by weight on the basis of the polymerizable monomers.
Claim 10
Dependent Claim
34 words
A process according to claim 1 wherein the organic peroxide as a polymerization initiator is used in an amount of about 0.01 to about 10% by weight on the basis of the polymerizable monomers.
Claim 11
Dependent Claim
34 words
A process according to claim 1 wherein the organic peroxide as a polymerization initiator is used in an amount of about 0.05 to about 3% by weight on the basis of the polymerizable monomers.
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) | 1996-03-15 | 1996-09-14 | 1997-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-15 | 2000-09-14 | 2001-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-15 | 2004-09-14 | 2005-03-16 | $7700.00 | Window Closed / Lapsed |