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US4820810A
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Urea catalyst for preparation of sucrose polyols useful for rigid polyurethane foams
Assignee: Lyondell Chemical Technology LP
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Filing: 1986-10-30
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Granted: 1989-04-11
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Expires: 2006-10-30
Abstract
Abstract Catalytic quantities of urea are used in the alkoxylation of aqueous sucrose to prepare low color polyols useful in rigid polyurethane foams.
Inventors
- 👤 Howard P. Klein
- 👤 Michael E. Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:09
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H15/08; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/487; C08G18/4883; C08G18/50; C08G18/5021; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2642; C08G65/2669; C08G65/2672; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
51 words
A polyol having reduced color prepared by a process comprising reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1.
Claim 2
Dependent Claim
51 words
A polyol having reduced color prepared by a process comprising reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1.
Claim 3
Dependent Claim
77 words
The polyol having reduced color prepared by a process comprising reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1, wherein the polyhydric initiator is selected from the group consisting of ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glycerine, sorbitol, trimethylolpropane, sucrose, alpha-methylglucoside and pentaerythritol.
Claim 4
Dependent Claim
77 words
The polyol having reduced color prepared by a process comprising reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1, wherein the polyhydric initiator is selected from the group consisting of ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glycerine, sorbitol, trimethylolpropane, sucrose, alpha-methylglucoside and pentaerythritol.
Claim 5
Dependent Claim
45 words
A polyol having reduced color prepared by a process comprising reacting aqueous sucrose with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to sucrose is from about 0.1:1 to about 10:1.
Claim 6
Dependent Claim
45 words
A polyol having reduced color prepared by a process comprising reacting aqueous sucrose with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to sucrose is from about 0.1:1 to about 10:1.
Claim 7
Dependent Claim
29 words
The polyol of claim 3 wherein the urea is present in an amount such that the mole ratio of urea to sucrose is from about 0.2:1 to about 2:1.
Claim 8
Dependent Claim
21 words
The polyol of claim 3 wherein the mole ratio of alkylene oxide to sucrose is from about 8:1 to about 20:1.
Claim 9
Dependent Claim
27 words
The polyol of claim 3 wherein the sucrose is reacted with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and butylene oxide.
Claim 10
Dependent Claim
29 words
The polyol of claim 3 wherein the sucrose is reacted with one or more alkylene oxides in the presence of a catalytically effective amount of a tertiary amine co-catalyst.
Claim 11
Dependent Claim
64 words
A polyol having reduced color prepared by a process comprising reacting aqueous sucrose with one or more alkylene oxides containing from 2 to 4 carbon atoms, wherein the mole ratio of alkylene oxide to sucrose is from about 8:1 to about 20:1, in the presence of an amount of urea such that the mole ratio to sucrose is from about 0.2:1 to about 2:1.
Claim 12
Dependent Claim
64 words
A polyol having reduced color prepared by a process comprising reacting aqueous sucrose with one or more alkylene oxides containing from 2 to 4 carbon atoms, wherein the mole ratio of alkylene oxide to sucrose is from about 8:1 to about 20:1, in the presence of an amount of urea such that the mole ratio to sucrose is from about 0.2:1 to about 2:1.
Claim 13
Dependent Claim
29 words
The polyol of claim 8 wherein the sucrose is reacted with one or more alkylene oxides in the presence of a catalytically effective amount of a tertiary amine co-catalyst.
Claim 14
Dependent Claim
53 words
A process for producing a polyol having reduced color consisting essentially of reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1.
Claim 15
Dependent Claim
53 words
A process for producing a polyol having reduced color consisting essentially of reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1.
Claim 16
Dependent Claim
79 words
The process for producing a polyol having reduced color consisting essentially of reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1, wherein the polyhydric initiator is selected from the group consisting of ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glycerine, sorbitol, trimethylolpropane, sucrose, alpha-methylglucoside and pentaerythritol.
Claim 17
Dependent Claim
79 words
The process for producing a polyol having reduced color consisting essentially of reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1, wherein the polyhydric initiator is selected from the group consisting of ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glycerine, sorbitol, trimethylolpropane, sucrose, alpha-methylglucoside and pentaerythritol.
Claim 18
Dependent Claim
58 words
A process for producing a polyol having reduced color comprising reacting aqueous sucrose with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1, in the absence of a subsequent alkoxylation with an added catalyst.
Claim 19
Dependent Claim
58 words
A process for producing a polyol having reduced color comprising reacting aqueous sucrose with one or more alkylene oxides in the presence of a catalytically effective amount of urea such that the mole ratio of urea to the polyhydric initiator is from about 0.1:1 to about 10:1, in the absence of a subsequent alkoxylation with an added catalyst.
Claim 20
Dependent Claim
29 words
The process of claim 12 wherein the urea is present in an amount such that the mole ratio of urea to sucrose is from about 0.2:1 to about 2:1.
Claim 21
Dependent Claim
21 words
The process of claim 12 wherein the mole ratio of alkylene oxide to sucrose is from about 8:1 to about 20:1.
Claim 22
Dependent Claim
27 words
The process of claim 12 wherein the sucrose is reacted with an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and butylene oxide.
Claim 23
Dependent Claim
29 words
The process of claim 12 wherein the sucrose is reacted with one or more alkylene oxide in the presence of a catalytically effective amount of a tertiary amine co-catalyst.
Claim 24
Dependent Claim
77 words
A process for producing a polyol having reduced color by reacting aqueous sucrose with one or more alkylene oxides containing from 2 to 4 carbon atoms, wherein the mole ratio of alkylene oxide to sucrose is from about 8:1 to about 20:1, in the presence of an amount of urea such that the mole ratio of urea to sucrose is from about 0.2:1 to about 2:1, in the absence of a subsequent alkoxylation with an added catalyst.
Claim 25
Dependent Claim
77 words
A process for producing a polyol having reduced color by reacting aqueous sucrose with one or more alkylene oxides containing from 2 to 4 carbon atoms, wherein the mole ratio of alkylene oxide to sucrose is from about 8:1 to about 20:1, in the presence of an amount of urea such that the mole ratio of urea to sucrose is from about 0.2:1 to about 2:1, in the absence of a subsequent alkoxylation with an added catalyst.
Claim 26
Dependent Claim
30 words
The process of claim 17 wherein the sucrose is additionally reacted with one or more alkylene oxides in the presence of a catalytically effective amount of a tertiary amine co-catalyst.
Claim 27
Dependent Claim
35 words
A process for producing a polyol having reduced color comprising reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides where the only catalyst employed is urea in a catalytic effective amount.
Claim 28
Dependent Claim
35 words
A process for producing a polyol having reduced color comprising reacting a polyhydric initiator or mixtures thereof with one or more alkylene oxides where the only catalyst employed is urea in a catalytic effective amount.
Claim 29
Dependent Claim
31 words
The process of claim 19 wherein the polyhydric initiator is selected from the group consisting of ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glycerine, sorbitol, trimethylolpropane, sucrose, alpha-methylglucoside and pentaerythritol.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |