US4001176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring phosphonates as flame-retardants
Assignee: Rohm and Haas Co
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Filing: 1973-04-26
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Granted: 1977-01-04
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Expires: 1993-04-26
Abstract
Abstract A nine-membered ring phosphonate compound having the formula ##STR1## wherein R 1 is hydrogen or methyl, R 2 is phenyl or substituted phenyl wherein the substitution is one or more of halogen, nitro, lower alkyl, cyclohexyl, alkoxy, naphthoxy or phenoxy and R 3 and R 4 are the same or different and are lower alkyl of up to eight carbon atoms, preferably methyl, is formed by the reaction of acrylic or methacrylic acid with a compound of the general formula ##STR2## wherein R 2 , R 3 and R 4 are as above. The ring phosphonates are useful for forming flame-retardant compositions from mixtures comprising the phosphonate and methyl methacrylate.
Inventors
- 👤 James S. Clovis
- 👤 Francis R. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:31
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5357; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
As an article of manufacture, an acrylic composition comprising an addition polymer formed from a mixture comprising: a. at least 50 percent by weight of methyl methacrylate; and b. 5 to 30 percent by weight of a flame-resistant phosphorus compound defined by the general formula: ##STR6## wherein R 1 is selected from the group consisting of hydrogen and methyl, R 2 is phenyl or substituted phenyl wherein the substitution is one or more of halogen, nitro, lower alkyl, cyclohexyl, alkoxy, naphthoxy, or phenoxy, and R 3 and R 4 are the same or different and are lower alkyl of up to 8 carbon atoms.
Claim 2
Dependent Claim
104 words
As an article of manufacture, an acrylic composition comprising an addition polymer formed from a mixture comprising: a. at least 50 percent by weight of methyl methacrylate; and b. 5 to 30 percent by weight of a flame-resistant phosphorus compound defined by the general formula: ##STR6## wherein R 1 is selected from the group consisting of hydrogen and methyl, R 2 is phenyl or substituted phenyl wherein the substitution is one or more of halogen, nitro, lower alkyl, cyclohexyl, alkoxy, naphthoxy, or phenoxy, and R 3 and R 4 are the same or different and are lower alkyl of up to 8 carbon atoms.
Claim 3
Dependent Claim
31 words
The acrylic composition of claim 1 wherein the polymer is formed from a mixture additionally comprising a member selected from the group consisting of isobornyl acrylate, isobornyl methacrylate and mixtures thereof.
Claim 4
Dependent Claim
21 words
The acrylic composition of claim 1 wherein the polymer is formed from a mixture additionally comprising an ethylenically unsaturated acrylic compound.
Claim 5
Dependent Claim
20 words
The acrylic composition of Claim 1 wherein the polymer is formed from a mixture additionally comprising acrylic or methacrylic acid.
Claim 6
Dependent Claim
66 words
As an article of manufacture, an acrylic composition comprising an addition polymer formed from a mixture comprising: a. at least 50 percent by weight of methyl methacrylate; and b. 5 to 30 percent by weight of a flame-resistant phosphorus compound defined by the general formula (b) of Claim 1 wherein R 1 is hydrogen, R 2 is phenyl, and R 3 and R 4 are methyl.
Claim 7
Dependent Claim
66 words
As an article of manufacture, an acrylic composition comprising an addition polymer formed from a mixture comprising: a. at least 50 percent by weight of methyl methacrylate; and b. 5 to 30 percent by weight of a flame-resistant phosphorus compound defined by the general formula (b) of Claim 1 wherein R 1 is methyl, R 2 is phenyl, and R 3 and R 4 are methyl.
References Cited (Backward Citations)
US2944526A
Cited
US3305526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |