Patent US3954011A successfully refreshed from Google Patents.
Patent US2252554A successfully refreshed from Google Patents.
US4042646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for curing unsaturated resins
Assignee: Nihon Yushi Co Ltd
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Filing: 1975-08-27
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Granted: 1977-08-16
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Expires: 1995-08-27
Abstract
Abstract A process for curing unsaturated polyester resins in a very short time at a low temperature using beta -amino- alpha , beta -unsaturated ketone and peroxide containing hydroperoxy group without the presence of metallic salt.
Inventors
- 👤 Koji Edamura
- 👤 Yoshimasa Nakagawa
- 👤 Yoshitaka Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:45
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0442
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
110 words
In a process for hardening unsaturated polyester resins which comprises contacting a mixture of an unsaturated polyester resin and a vinyl monomer copolymerizable therewith, with a hardening agent, the improvement which comprises; said hardening agent is a mixture of a peroxide containing a hydroperoxy group and a β-amino-α,β -unsaturated ketone having the formula ##STR8## wherein R 1 is hydrogen, alkyl having one to 6 carbon atoms, cyanoalkyl or hydroxyalkyl having one to 6 carbon atoms, cycloalkyl having 3 to 12 carbon atoms or aralkyl, R 2 and R 3 each are hydrogen, alkyl having one to 6 carbon atoms, cycloalkyl having 3 to 12 carbon atoms, aryl, alkoxy or amino.
Claim 2
Dependent Claim
110 words
In a process for hardening unsaturated polyester resins which comprises contacting a mixture of an unsaturated polyester resin and a vinyl monomer copolymerizable therewith, with a hardening agent, the improvement which comprises; said hardening agent is a mixture of a peroxide containing a hydroperoxy group and a β-amino-α,β -unsaturated ketone having the formula ##STR8## wherein R 1 is hydrogen, alkyl having one to 6 carbon atoms, cyanoalkyl or hydroxyalkyl having one to 6 carbon atoms, cycloalkyl having 3 to 12 carbon atoms or aralkyl, R 2 and R 3 each are hydrogen, alkyl having one to 6 carbon atoms, cycloalkyl having 3 to 12 carbon atoms, aryl, alkoxy or amino.
Claim 3
Dependent Claim
32 words
A process according to claim 1 in which said unsaturated polyester is obtained by reaction between an unsaturated dicarboxylic acid or polyester-forming derivative thereof, with a saturated polyol or polyester-forming derivative thereof.
Claim 4
Dependent Claim
49 words
A process according to claim 1 in which said hardening agent contains from 0.01 to 10.0 weight percent of said peroxide, based on the weight of said unsaturated polyester resin, and from 0.005 to 10.0 weight percent of said ketone, based on the weight of said unsaturated polyester resin.
Claim 5
Dependent Claim
49 words
A process according to claim 1 in which said hardening agent contains from 0.05 to 5.0 weight percent of said peroxide, based on the weight of said unsaturated polyester resin, and from 0.01 to 5.0 weight percent of said ketone, based on the weight of said unsaturated polyester resin.
Claim 6
Dependent Claim
17 words
A process according to claim 3 in which the hardening temperature is from -10° to +150° C.
Claim 7
Dependent Claim
35 words
A process according to claim 4, wherein said β-amino-α,β-unsaturated ketone is one or more compounds selected from the group consisting of 4-amino-3-pentene-2-one, 4-methylamino-3-pentene-2-one, 4-isopropylamino-3-pentene-2-one, 4-t-butylamino-3-pentene-2-one, 4-sec-butylamino-3-pentene-2-one, 4-n-butylamino-3-pentene-2-one, 4-cyclohexylamino-3-pentene-2-one, 4-benzylamino-3-pentene-2-one, 4-ethanolamino-3-pentene-2-one, methyl-β-aminocrotonate, ethyl-β-aminocrotonate, methyl-β-t-butylaminocrotonate, and 1-phenyl-3-amino-2-butene-1-one.
Claim 8
Dependent Claim
12 words
A process according to claim 6, wherein said peroxide is hydrogen peroxide.
Claim 9
Dependent Claim
40 words
A process according to claim 6, wherein said peroxide is one or more ketone peroxide compounds selected from the group consisting of methylethylketone peroxide, methylisobutylketone peroxide, cyclohexanone peroxide, methylcyclohexanone peroxide, 3,3,5-trimethylcyclohexanone peroxide, acetylacetone peroxide, 4-methoxy-4-methylpentane-2-one peroxide and diacetone alcohol peroxide.
Claim 10
Dependent Claim
26 words
A process according to claim 6, wherein said peroxide is a hydroperoxide selected from the group consisting of cumene hydroperoxide, tert-butyl hydroperoxide, 2,5-dimethylhexyl-2,5-dihydroperoxide and p-menthane hydroperoxide.
Claim 11
Dependent Claim
13 words
A process according to claim 6, wherein said peroxide is an aldehyde peroxide.
Claim 12
Dependent Claim
18 words
A process according to claim 4 in which the hardening temperature is from zero to plus 40° C.
Claim 13
Dependent Claim
13 words
A process according to claim 1 in which said vinyl monomer is styrene.
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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |