Patent US4091223A successfully refreshed from Google Patents.
US4091223A
Expired / Lapsed
US
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Unsaturated hydantoin coagents
Assignee: Novartis Corp
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Filing: 1976-08-04
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Granted: 1978-05-23
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Expires: 1996-08-04
Abstract
Abstract Unsaturated hydantoin derivatives of the formula ##STR1## WHERE R 1 and R 2 are alkyl, R 3 is vinyl, allyl, alkylene, substituted alkylene or polyvalent aralkyl, R 4 is vinyl or allyl and n is 1 to 3, are coagents for curing polymeric compositions to improve their physical, chemical and electrical properties. These coagents are particularly useful in crosslinking PVC, polyethylene, chlorinated polyethylene and poly(ethylene/vinyl acetate) compositions.
Inventors
- 👤 Hyman W. Zussman
- 👤 Martin Knell
- 👤 Martin Dexter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:30
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D233/74; C08; C08F; C08F291/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
An unsaturated hydantoin of the formula selected from the group consisting of ##STR12## wherein R 1 and R 2 are independently each hydrogen, alkyl of 1 to 6 carbon atoms or phenyl, or R 1 and R 2 together are alkylene of 4 to 6 carbon atoms, R 3 is alkylene of 1 to 6 carbon atoms, 3-oxapentamethylene, 2-allyloxytrimethylene or p-xylylene, and R 4 is vinyl or allyl.
Claim 2
Dependent Claim
68 words
An unsaturated hydantoin of the formula selected from the group consisting of ##STR12## wherein R 1 and R 2 are independently each hydrogen, alkyl of 1 to 6 carbon atoms or phenyl, or R 1 and R 2 together are alkylene of 4 to 6 carbon atoms, R 3 is alkylene of 1 to 6 carbon atoms, 3-oxapentamethylene, 2-allyloxytrimethylene or p-xylylene, and R 4 is vinyl or allyl.
Claim 3
Dependent Claim
45 words
A compound according to claim 1 wherein R 1 and R 2 are independently each alkyl of 1 to 4 carbon atoms or R 1 and R 2 together are pentamethylene, and R 3 is alkylene of 1 to 2 carbon atoms, 2-allyloxytrimethylene or p-xylylene.
Claim 4
Dependent Claim
15 words
A compound according to claim 1 wherein R 1 and R 2 are each methyl.
Claim 5
Dependent Claim
9 words
The compound according to claim 1 which is 1,3-diallyl-5,5-dimethylhydantoin.
Claim 6
Dependent Claim
9 words
The compound according to claim 1 which is 1,1'-methylene-bis(3-allyl-5,5-dimethylhydantoin).
Claim 7
Dependent Claim
9 words
The compound according to claim 1 which is 1,1'-p-xylylene-bis(3-allyl-5,5-dimethylhydantoin).
Claim 8
Dependent Claim
9 words
The compound according to claim 1 which is 3,3'-methylene-bis-(1-allyl-5,5-dimethylhydantoin).
Claim 9
Dependent Claim
9 words
The compound according to claim 1 which is 1,3-bis(1-allyl-5,5-dimethylhydantoin-3-yl)-2-allyloxypropane.
Claim 10
Dependent Claim
9 words
The compound according to claim 1 which is 2,4,6-tris(3-allyl-5,5-dimethylhydantoin-1-ylmethyl)-mesitylene.
Claim 11
Dependent Claim
9 words
The compound according to claim 1 which is 1,1'-p-xylylene-bis(3-vinyl-5,5-dimethylhydantoin).
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |