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Patent US4028434A successfully refreshed from Google Patents.
US4028434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polymers of vinyl phosphonic acid esters
Assignee: Bayer AG
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Filing: 1975-08-14
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Granted: 1977-06-07
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Expires: 1995-08-14
Abstract
Abstract The instant invention relates to graft polymers of vinyl phosphonic acid esters, optionally together with nitrogen-containing polymerizable vinyl compounds, on polyalkylene glycols and to a process for their production. The polymers so produced necessarily contain phosphorus and, optionally, nitrogen in the molecule. The polymers are rendered flameproof by the phosphorus and, in addition, self-extinguishing by the nitrogen.
Inventors
- 👤 Wolfgang Konter
- 👤 Josef Witte
- 👤 Peter Vehlewald
- 👤 Hans-Dieter Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:26
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
A graft polymer of a. from 5 to 50 parts by weight of halogen-free vinyl phosphonic acid alkyl ester b. from 0 to 30 parts by weight of nitrogen-containing polymerizable vinyl compound and c. a polyalkylene oxide free from unsaturation having a molecular weight of from 1500 to 10,000 the amounts of components (a) and (b) being based on 100 parts by weight of component (c).
Claim 2
Dependent Claim
66 words
A graft polymer of a. from 5 to 50 parts by weight of halogen-free vinyl phosphonic acid alkyl ester b. from 0 to 30 parts by weight of nitrogen-containing polymerizable vinyl compound and c. a polyalkylene oxide free from unsaturation having a molecular weight of from 1500 to 10,000 the amounts of components (a) and (b) being based on 100 parts by weight of component (c).
Claim 3
Dependent Claim
46 words
A graft polymer according to claim 1, wherein component (a) is vinyl phosphonic acid methyl ester, component (b) comprising from 2 to 20 parts by weight and is selected from the group consisting of acrylamide, methacrylamide, acrylonitrile and methacrylonitrile, and component (c) is a polyethylene oxide.
Claim 4
Dependent Claim
45 words
A process for the production of graft polymers, wherein vinyl phosphonic acid esters and, optionally, copolymerizable nitrogen-containing vinyl compounds are polymerized at temperatures in the range from 5° to 150° C, in the presence of a polyalkylene glycol and radical catalysts or under high-energy radiation.
Claim 5
Dependent Claim
45 words
A process for the production of graft polymers, wherein vinyl phosphonic acid esters and, optionally, copolymerizable nitrogen-containing vinyl compounds are polymerized at temperatures in the range from 5° to 150° C, in the presence of a polyalkylene glycol and radical catalysts or under high-energy radiation.
Claim 6
Dependent Claim
18 words
A process as claimed in claim 3, wherein the polymerization reaction is conducted in an inert organic solvent.
Claim 7
Dependent Claim
42 words
A process as claimed in claim 3, wherein from 5 to 50 parts by weight of vinyl phosphonic acid esters from 0 to 30 parts by weight of the nitrogen-containing vinyl compound are grafted onto 100 parts by weight of polyalkylene glycol.
Claim 8
Dependent Claim
27 words
A process as claimed in claim 5, wherein vinyl phosphonic acid methyl ester and acrylamide, methacrylamide, acrylonitrile or methacrylonitrile are grafted onto polyethylene oxide or polypropylene oxide.
References Cited (Backward Citations)
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Cited
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US3626027A
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US3627839A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |