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Patent US4335230A successfully refreshed from Google Patents.
US4335230A
Expired / Lapsed
US
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Novel compositions comprising asymmetrical peroxydicarbonates and methods for their use
Assignee: Akzona Inc
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Filing: 1980-12-03
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Granted: 1982-06-15
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Expires: 2000-12-03
Abstract
Abstract Compositions comprising asymmetrical peroxydicarbonates and their use in polymerizing ethylenically unsaturated monomers such as vinyl chloride and diethylene glycol bis (allyl carbonate) are disclosed.
Inventors
- 👤 James R. Kolczynski
- 👤 Gerald A. Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:06
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F4/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A method for polymerizing ethylenically unsaturated monomers, or a mixture of said monomers, comprising contacting said monomers or mixture under free-radical initiating conditions with an effective amount of a composition comprising from about 25 to about 70 molar percent of an asymmetrical peroxydicarbonate of the formula ##STR8## from about 15 to about 45 molar percent of a first symmetrical peroxydicarbonate of the formula ##STR9## and from about 15 to about 45 molar percent of a second symmetrical peroxydicarbonate of the formula ##STR10## wherein R 1 is isopropyl and R 2 is sec-butyl.
Claim 2
Independent Claim
92 words
A method for polymerizing ethylenically unsaturated monomers, or a mixture of said monomers, comprising contacting said monomers or mixture under free-radical initiating conditions with an effective amount of a composition comprising from about 25 to about 70 molar percent of an asymmetrical peroxydicarbonate of the formula ##STR8## from about 15 to about 45 molar percent of a first symmetrical peroxydicarbonate of the formula ##STR9## and from about 15 to about 45 molar percent of a second symmetrical peroxydicarbonate of the formula ##STR10## wherein R 1 is isopropyl and R 2 is sec-butyl.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the ethylenically unsaturated monomer is vinyl chloride.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the ethylenically unsaturated monomer is diethylene glycol bis (allyl carbonate).
Claim 5
Dependent Claim
32 words
The method of claim 1, 2, 3 wherein the composition comprises about 50 molar percent of isopropyl-sec-butyl peroxydicarbonate, about 25 molar percent of diisopropyl peroxydicarbonate, and about 25 percent of di-sec-butyl peroxydicarbonate.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |