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US4284826A
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US
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Polyether polyols
Assignee: Adama Makhteshim Ltd
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Filing: 1979-11-16
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Granted: 1981-08-18
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Expires: 1999-11-16
Abstract
Abstract Low viscosity chlorine containing polyether polyols, and more specifically a low molecular weight, low viscosity diol oligomer of 4,4,4-trichloro-1,2-epoxybutane of the formula ##STR1## wherein R and R' are each selected from hydrogen and --CH 2 CCl 3 , wherein R and R' are different, and wherein n is an integer from 2 to 4; is useful in preparing flame retardant polyurethanes.
Inventors
- 👤 David Aelony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3804; C08G18/3806; C08G18/3808; C07; C07C; C07C41/00; C07C41/01; C07C41/02; C07C41/03; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/137
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A low molecular weight, low viscosity liquid diol oligomer of 4,4,4-trichloro-1,2-epoxybutane of the formula ##STR3## wherein R and R' are selected from hydrogen and --CH 2 CCl 3 , wherein R and R' are different, and wherein n is an integer from 2 to 4.
Claim 2
Dependent Claim
45 words
A low molecular weight, low viscosity liquid diol oligomer of 4,4,4-trichloro-1,2-epoxybutane of the formula ##STR3## wherein R and R' are selected from hydrogen and --CH 2 CCl 3 , wherein R and R' are different, and wherein n is an integer from 2 to 4.
Claim 3
Dependent Claim
20 words
Low molecular weight, low viscosity liquid diol oligomer of 4,4,4-trichloro-1,2-epoxybutane in accordance with claim 1 comprising a mixture of diols.
Claim 4
Dependent Claim
23 words
A diol oligomer in accordance with claim 1 having an average molecular weight below 600 and a viscosity of less than 3 stokes.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |