US3855351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di (2-phenoxyethyl) peroxydicarbonate
Assignee: Pennwalt Corp
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Filing: 1973-10-24
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Granted: 1974-12-17
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Expires: 1993-10-24
Abstract
Abstract Di-(2-phenoxyethyl) peroxydicarbonate and improved processes employing same as initiators for the polymerization of ethylenically unsaturated monomers (such as vinyl chloride) and as curing catalysts for curing unsaturated polyester resin compositions.
Inventors
- 👤 J Sanchez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:57
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
IN A PROCESS FOR CURING A MIXTURE OF AN UNSATURATED POLYESTER OF A DICARBOXYLIC OR POLYCARBOXYLIC ACID OR ITS ANHYDRIDE AND AN ETHYLENICALLY UNSATURATED MONOMER BY HEATING AT A CURING TEMPERATURE IN THE PRESENCE OF A CURING CATALYST, THE IMPROVEMENT WHICH COMPRISES EMPLOYING DI-(2PHENOXYETHYL) PEROXYDICARBONATE AS THE CURING CATALYST.
Claim 2
Dependent Claim
49 words
IN A PROCESS FOR CURING A MIXTURE OF AN UNSATURATED POLYESTER OF A DICARBOXYLIC OR POLYCARBOXYLIC ACID OR ITS ANHYDRIDE AND AN ETHYLENICALLY UNSATURATED MONOMER BY HEATING AT A CURING TEMPERATURE IN THE PRESENCE OF A CURING CATALYST, THE IMPROVEMENT WHICH COMPRISES EMPLOYING DI-(2PHENOXYETHYL) PEROXYDICARBONATE AS THE CURING CATALYST.
Claim 3
Dependent Claim
20 words
claim 1 wherein about 0.2-2.5% by weight of said curing catalyst is employed based on the weight of said mixture.
Claim 4
Dependent Claim
24 words
claim 2 wherein said mixture comprises (a) the esterification product of propylene glycol, maleic anhydride and phthalic anhydride in admixture with (b) monomeric styrene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |