US4469862A
Expired / Lapsed
US
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Polymeric diacyl peroxides
Assignee: NOF Corp
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Filing: 1983-06-27
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Granted: 1984-09-04
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Expires: 2003-06-27
Abstract
Abstract An industrially highly valuable novel polymeric diacyl peroxide which is used as a polymerization initiator for free radical polymerization of vinyl monomer, and which is appreciably safe in production and handling, rapidly soluble in vinyl monomer with high solubility, and has exceedingly high catalyst efficiency in the free radical polymerization of vinyl monomer.
Inventors
- 👤 Takeshi Komai
- 👤 Toshihiro Izumi
- 👤 Syuji Suyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:51
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F4/36; C07; C07C; C07C409/00; C07C409/32; C07C409/34; C08G; C08G67/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
39 words
Polymeric diacyl peroxide which consists essentially of a randomly oriented repeated structural unit of a general formula ##STR38## wherein X represents a group selected from the group consisting of ##STR39## and which has a mean molecular weight of 1,400-18,000.
Claim 2
Dependent Claim
39 words
Polymeric diacyl peroxide which consists essentially of a randomly oriented repeated structural unit of a general formula ##STR38## wherein X represents a group selected from the group consisting of ##STR39## and which has a mean molecular weight of 1,400-18,000.
Claim 3
Dependent Claim
31 words
Polymeric diacyl peroxide as defined in claim 1 which consists essentially of a randomly oriented repeated structural unit of a formula: ##STR40## and which has a mean molecular weight of 2,000-16,000.
Claim 4
Dependent Claim
31 words
Polymeric diacyl peroxide as defined in claim 1 which consists essentially of a randomly oriented repeated structural unit of a formula: ##STR41## and which has a mean molecular weight of 2,000-17,000.
Claim 5
Dependent Claim
31 words
Polymeric diacyl peroxide as defined in claim 1 which consists essentially of a randomly oriented repeated structural unit of a formula: ##STR42## and which has a mean molecular weight of 1,400-16,000.
Claim 6
Dependent Claim
32 words
Polymeric diacyl peroxide as defined in claim 1 which consists essentially of a randomly oriented repeated structural unit of a general formula: ##STR43## and which has a mean molecular weight of 1,700-18,000.
Claim 7
Dependent Claim
29 words
Polymerization initiator for vinyl monomer, comprising, as an active ingredient, the polymeric diacyl peroxide which consists essentially of a randomly oriented repeated structural unit of the general formula (1).
Claim 8
Dependent Claim
29 words
Polymerization initiator for vinyl monomer, comprising, as an active ingredient, the polymeric diacyl peroxide which consists essentially of a randomly oriented repeated structural unit of the general formula (1).
Claim 9
Dependent Claim
13 words
Polymerization initiator as defined in claim 6 wherein the vinyl monomer is styrene.
References Cited (Backward Citations)
US3671651A
Cited
US4283512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |