Patent US4446313A successfully refreshed from Google Patents.
US4446313A
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Polyether polyol process
Assignee: Shell USA Inc
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Filing: 1981-07-21
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Granted: 1984-05-01
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Expires: 2001-07-21
Abstract
Abstract Process for the manufacture of a polyether polyol by reaction between an organic compound containing 2 or more active hydrogen atoms in the molecule and an alkylene oxide in the presence of a catalyst comprising a tertiary amine NRR' 2 , in which R is a cycloalkyl or cycloalkenyl group and each R' may be an alkyl, cycloalkyl or cycloalkenyl group.
Inventors
- 👤 Peter Dix
- 👤 George A. Pogany
- 👤 Parminder Sangha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2669; C08G65/2672
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A process for the manufacture of a polyether polyol which process comprises reacting sucrose or sorbitol with ethylene oxide, propylene oxide or a mixture thereof at a temperature ranging from about 80° C. to about 120° C. and at a pressure of up to 6 bar in the presence of a catalyst which comprises: (a) a tertiary amine NRR' 2 , in which R is a cycloalkyl or cycloalkenyl group and each R' may be an alkyl, cycloalkyl or cycloalkenyl group and (b) a nitrogen compound containing in the molecule at least one hydrogen atom which is capable of reacting with alkylene oxides.
Claim 2
Dependent Claim
103 words
A process for the manufacture of a polyether polyol which process comprises reacting sucrose or sorbitol with ethylene oxide, propylene oxide or a mixture thereof at a temperature ranging from about 80° C. to about 120° C. and at a pressure of up to 6 bar in the presence of a catalyst which comprises: (a) a tertiary amine NRR' 2 , in which R is a cycloalkyl or cycloalkenyl group and each R' may be an alkyl, cycloalkyl or cycloalkenyl group and (b) a nitrogen compound containing in the molecule at least one hydrogen atom which is capable of reacting with alkylene oxides.
Claim 3
Dependent Claim
21 words
The process as claimed in claim 1, in which R is a cyclohexyl group and each R' is an alkyl group.
Claim 4
Dependent Claim
14 words
The process as claimed in claim 2, in which the tertiary amine is dimethylaminocyclohexane.
Claim 5
Dependent Claim
18 words
The process as claimed in claim 1, in which the nitrogen compound is a primary or secondary amine.
Claim 6
Dependent Claim
20 words
The process as claimed in claim 1, in which the amine contains at least one hydroxyl group in the molecule.
Claim 7
Dependent Claim
16 words
The process as claimed in claims 5, in which the nitrogen compound is a tertiary amine.
Claim 8
Dependent Claim
14 words
The process as claimed in claim 6, in which the tertiary amine is 2-(dimethylamino)ethanol.
Claim 9
Dependent Claim
33 words
The process as claimed in claim 1, in which the amine catalyst is used in an amount within the range of about 0.2 to about 10% by weight of the sucrose or sorbitol.
Claim 10
Dependent Claim
33 words
The process as claimed in claim 8, in which the amine catalyst is used in an amount within the range of about 0.5 to about 5% by weight of the sucrose or sorbitol.
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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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |