US4396555A
Expired / Lapsed
US
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Partial esters of polyphosphoric acid
Assignee: Dow Chemical Co
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Filing: 1981-09-04
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Granted: 1983-08-02
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Expires: 2001-09-04
Abstract
Abstract Glycol ether partial esters of the formula ##STR1## where R is a specified substituent formed by reaction of monohydroxyl reactants of (poly)glycols with phosphorus pentoxide.
Inventors
- 👤 Thomas P. Brady
- 👤 Horst G. Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:53
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/098; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; D06M13/295
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
Polyphosphoric acid partial esters of the formula ##STR4## wherein R is each occurrence a remnant formed by removal of a hydroxyl from a monohydroxyl compound selected from the group consisting of (a) a (poly)glycol monoether of the formula ##STR5## wherein R 1 is hydrogen, methyl, or halomethyl; R 2 is C 1-6 alkyl or haloalkyl, phenyl, halophenyl or methylphenyl; and n is a number from 1 to 4; (b) a phenol or halophenol; and (c) a C 1-20 alkanol or hydrogenated alkanol; provided that in at least one occurrence R is selected from (a); m is an integer from zero to three, y is an integer from one to three and q is equal to m+4-y.
Claim 2
Dependent Claim
116 words
Polyphosphoric acid partial esters of the formula ##STR4## wherein R is each occurrence a remnant formed by removal of a hydroxyl from a monohydroxyl compound selected from the group consisting of (a) a (poly)glycol monoether of the formula ##STR5## wherein R 1 is hydrogen, methyl, or halomethyl; R 2 is C 1-6 alkyl or haloalkyl, phenyl, halophenyl or methylphenyl; and n is a number from 1 to 4; (b) a phenol or halophenol; and (c) a C 1-20 alkanol or hydrogenated alkanol; provided that in at least one occurrence R is selected from (a); m is an integer from zero to three, y is an integer from one to three and q is equal to m+4-y.
Claim 3
Dependent Claim
15 words
Polyphosphoric acid partial esters of claim 1 wherein R is each occurrence selected from (a).
Claim 4
Dependent Claim
19 words
The polyphosphoric acid partial esters of claim 2 wherein m is zero and both y and q equal 2.
Claim 5
Dependent Claim
13 words
The polyphosphoric acid partial esters of claim 3 wherein R 1 is hydrogen.
Claim 6
Dependent Claim
12 words
The polyphosphoric acid partial esters of claim 4 wherein R is butoxyethyl.
Claim 7
Dependent Claim
92 words
A composition of matter containing polyphosphoric acid partial esters of claim 2 or 3 in an amount of at least 90 percent by weight which is formed by contacting a (poly)glycol monoether of the formula ##STR6## wherein R 1 is hydrogen, methyl, or halomethyl; R 2 is C 1-6 alkyl or haloalkyl, phenyl, halophenyl or methylphenyl; and n is a number from 1 to 4; with a slurry comprising phosphorus pentoxide and an organic solvent at a temperature less than 150° C. and thereafter removing the organic solvent to recover the composition.
References Cited (Backward Citations)
US2503204A
Cited
US2947774A
Cited
US3062858A
Cited
US3150039A
Cited
BE869765A
Cited
GB2013643B
Cited
US4301025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |