US3879498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialkyl 1-acryloyloxy-2-alkenyl-1-phosphonates and dialkyl 1-methacryloxy-2-alkenyl-1-phosphonates
Assignee: Individual
•
Filing: 1971-08-31
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Granted: 1975-04-22
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Expires: 1991-08-31
Abstract
Abstract Dialkyl 1-acryloyloxy-2-alkenyl-1-phosphonates and dialkyl 1methacryloyloxy-2-alkenyl-1-phosphonates are prepared by reacting a dialkyl 1-hydroxy-2-alkenyl-1-phosphonate with acryloyl- or methacryloyl chloride in the presence of a base, using preferably an inert organic solvent. The dialkyl 1-acryloyloxy-2-alkenyl-1phosphonates and the dialkyl 1-methacryloyloxy-2-alkenyl-1phosphonates produced are novel compounds. They are useful as flame retardant and cross-linking comonomers in the preparation of self-extinguishing and/or flame retardant polymers. They also can be homopolymerized to give novel phosphorus containing, selfextinguishing polymers.
Inventors
- 👤 Miltiadis I Iliopulos
- 👤 Werner K E Ege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/20; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C07F9/4015
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
6 words
A compound having the general formula
Claim 2
Dependent Claim
6 words
A compound having the general formula
Claim 3
Dependent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA
Claim 5
Dependent Claim
20 words
A compound as defined in claim 1 in which R1, R2, R3 and R4 are hydrogen, and R5 is methyl.
Claim 6
Dependent Claim
20 words
A compound as defined in claim 1 in which R1, R2, R3 and R4 are hydrogen, and R5 is ethyl.
Claim 7
Dependent Claim
21 words
A compound as defined in claim 1 in which R2, R3 and R4 are hydrogen, and R1 and R5 are methyl.
Claim 8
Dependent Claim
22 words
A compound as defined in claim 1 in which R2, R3 and R4 are hydrogen, R1 is methyl and R5 is ethyl.
Claim 9
Dependent Claim
20 words
A compound as defined in claim 1 in which R1, R2, R3 and R4 are hydrogen and R5 is chloroeThyl.
Claim 10
Dependent Claim
19 words
a compound as defined in claim 1 in which R2, R3, R4 are hydrogen, R1 and R5 is chloroethyl.
References Cited (Backward Citations)
US3030347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |