Patent US3978166A successfully refreshed from Google Patents.
US3978166A
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Cyclic phosphonates
Assignee: Borg Warner Corp
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Filing: 1975-04-07
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Granted: 1976-08-31
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Expires: 1995-04-07
Abstract
Abstract Alcohols preferably having a pka below that of propanol-1 are heated with certain heterocyclic phosphites to give phosphonates and certain heterocyclic phosphonites, to give phosphinates. If small amounts of alcohols are employed, the products are generally polymeric in nature whereas if larger amounts of the alcohol are employed, there is generally ring opening to the simpler monomer, or isomerization to the phosphonate or phosphinate. The products are useful as fire retardants and as adhesives for glass. Pentaerythritol phosphite can be self-polymerized by such heating to form the adhesive polymer.
Inventors
- 👤 Ingenuin Hechenbleikner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:30
CPC Classifications
C; C09; C09J; C09J185/00; C09J185/02; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/4075; C07F9/4078; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; C08; C08G; C08G79/00; C08G79/02; C08G79/04; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/53; C08K5/5317; C08K5/5333; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
114 words
A monomeric phosphonate having a formula selected from the group consisting of: ##EQU21## where R 1 is alkyl, alkenyl or aralkyl, R 13 is normal alkyl of 3 to 4 carbon atoms or the residue of a monohydric alcohol having a pKa below that of n-propyl alcohol from which the OH is removed, R 16 is as defined for R 1 or R 13 , R 3 is alkyl of 1 to 17 carbon atoms or hydroxymethyl, R 4 , R 5 , R 6 , R 7 , R 8 and R 9 are hydrogen or lower alkyl and R 17 and R 18 are lower alkyl and s is 0 or 1.
Claim 2
Dependent Claim
114 words
A monomeric phosphonate having a formula selected from the group consisting of: ##EQU21## where R 1 is alkyl, alkenyl or aralkyl, R 13 is normal alkyl of 3 to 4 carbon atoms or the residue of a monohydric alcohol having a pKa below that of n-propyl alcohol from which the OH is removed, R 16 is as defined for R 1 or R 13 , R 3 is alkyl of 1 to 17 carbon atoms or hydroxymethyl, R 4 , R 5 , R 6 , R 7 , R 8 and R 9 are hydrogen or lower alkyl and R 17 and R 18 are lower alkyl and s is 0 or 1.
Claim 3
Dependent Claim
21 words
A phosphonate according to claim 1 where R 13 is n-alkyl of 1 to 4 carbon atoms, allyl, benzyl or 2,3-dibromopropyl.
Claim 4
Dependent Claim
9 words
A phosphonate according to claim 2 having formula (1).
Claim 5
Dependent Claim
16 words
A phosphonate according to claim 3 wherein R 16 is methyl, ethyl, allyl, benzyl or 2,3-dibromopropyl.
Claim 6
Dependent Claim
11 words
A phosphonate according to claim 4 wherein R 1 is methyl.
Claim 7
Dependent Claim
19 words
A phosphonate according to claim 3 where R 13 and R 16 are butyl and R 1 is methyl.
Claim 8
Dependent Claim
18 words
A phosphonate according to claim 3 wherein R 1 , R 13 and R 16 are all methyl.
Claim 9
Dependent Claim
22 words
A phosphonate according to claim 3 wherein R 13 is allyl or 2,3-dibromopropyl, R 1 is methyl and R 16 is methyl.
Claim 10
Dependent Claim
11 words
A phosphonate according to claim 8 where R 13 is allyl.
Claim 11
Dependent Claim
11 words
A phosphonate according to claim 8 where R 13 is 2,3-dibromopropyl.
Claim 12
Dependent Claim
9 words
A phosphonate according to claim 2 having formula (2).
Claim 13
Dependent Claim
17 words
A phosphonate according to claim 11 where R 3 is alkyl of 1 to 2 carbon atoms.
Claim 14
Dependent Claim
16 words
A phosphonate according to claim 12 where R 13 is methyl, ethyl, allyl, benzyl or 2,3-dibromopropyl.
Claim 15
Dependent Claim
11 words
A phosphonate according to claim 11 where R 3 is hydroxymethyl.
Claim 16
Dependent Claim
16 words
A phosphonate according to claim 14 wherein R 13 is methyl, ethyl, allyl, benzyl or 2,3-dibromopropyl.
Claim 17
Dependent Claim
9 words
A phosphonate according to claim 2 having formula (3).
Claim 18
Dependent Claim
11 words
A phosphonate according to claim 16 where R 8 is hydrogen.
Claim 19
Dependent Claim
16 words
A phosphonate according to claim 17 wherein R 13 is methyl, ethyl, allyl, benzyl or 2,3-dibromopropyl.
Claim 20
Dependent Claim
10 words
A phosphonate according to claim 18 where s is 0.
Claim 21
Dependent Claim
21 words
A phosphonate according to claim 19 where R 4 , R 5 , R 6 and R 7 are all hydrogen.
Claim 22
Dependent Claim
10 words
A phosphonate according to claim 18 where s is 1.
Claim 23
Dependent Claim
9 words
A phosphonate according to claim 2 having formula (4).
Claim 24
Dependent Claim
30 words
A phosphonate according to claim 22 where R 4 , R 5 , R 6 and R 7 are all hydrogen and R 17 and R 18 are both methyl.
Claim 25
Dependent Claim
10 words
The polymeric phosphonate of: ##EQU22## having the repeating unit: ##EQU23##
Claim 26
Dependent Claim
10 words
The polymeric phosphonate of: ##EQU22## having the repeating unit: ##EQU23##
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |