US3896187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(haloethyl-ethyleneoxy) phosphoric acid ester polymers
Assignee: Stauffer Chemical Co
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Filing: 1973-10-25
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Granted: 1975-07-22
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Expires: 1993-10-25
Abstract
Abstract Liquid poly(haloethyl-ethyleneoxy) phosphoric acid esters are prepared by condensing tris (2-haloethyl) phosphate at a temperature of from 140* to 220*C. in the presence of a catalyst until from about 0.5 to about 0.9 moles of ethylene dihalide per mole of tris(2-haloethyl) phosphate is evolved. A low acidity product is obtained. Any residual acidity in the product is substantially eliminated by neutralization with an alkylene oxide.
Inventors
- 👤 Edward D Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:36
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C08G; C08G79/00; C08G79/02; C08G79/04; C08J2375/00; C08J2375/04; C08J2485/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
LIQUID POLY(CHLOROETHYLETHYLENEOXY) PHOSPHORIC ACID ESTERS WHICH ARE PEPARED BY REACTING TRIS(2-CHLROOETHYL) PHOSPHATE BY HEATING SAID PHOSPHATE TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 140* TO ABOUT 220*C. IN THE PRESENCE OF A BASIC CATALYST WITH ETHYLENE DICHLORIDE AS REACTION BYPRODUCT, AND TERMINATING SAID REACTION AT A REACTION BYPRODUCT LEVEL OF ETHYLENE DICHLORIDE IN AN AMOUNT OF FROM ABOUT 0.5 MOLE TO ABOUT 0.9 MOLE ETHYLENE DICHLORIDE PER MOLE OF TRIS(2CHLOROETHYL) PHOSPHATE IN SAID REACTION.
Claim 2
Dependent Claim
76 words
LIQUID POLY(CHLOROETHYLETHYLENEOXY) PHOSPHORIC ACID ESTERS WHICH ARE PEPARED BY REACTING TRIS(2-CHLROOETHYL) PHOSPHATE BY HEATING SAID PHOSPHATE TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 140* TO ABOUT 220*C. IN THE PRESENCE OF A BASIC CATALYST WITH ETHYLENE DICHLORIDE AS REACTION BYPRODUCT, AND TERMINATING SAID REACTION AT A REACTION BYPRODUCT LEVEL OF ETHYLENE DICHLORIDE IN AN AMOUNT OF FROM ABOUT 0.5 MOLE TO ABOUT 0.9 MOLE ETHYLENE DICHLORIDE PER MOLE OF TRIS(2CHLOROETHYL) PHOSPHATE IN SAID REACTION.
Claim 3
Dependent Claim
27 words
THE PRODUCT OF CLAIM I WHICH FURTHER INCLUDES THE STEP OF POST TREATING THE REACTION PRODUCT WITH AN ALKYLENE OXIDE TO NEUTRILIZE THE ACIDITY IN SAID PRODUCT.
References Cited (Backward Citations)
US3660539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |