US4459397A
Expired / Lapsed
US
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Modified polyether polyol for preparation of polyurethane polymer
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1983-04-25
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Granted: 1984-07-10
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Expires: 2003-04-25
Abstract
Abstract A modified polyether polyol for use in the manufacture of polyurethane polymer having improved fire-resisting qualities, and the method for making such a polyether polyol. The modified polyether polyol includes a polyether polyol having urea chemically bound thereto. The method for making the modified polyether polyol includes reacting a reducing sugar with propylene oxide to produce a polyether polyol, which is then reacted with unsubstituted urea to chemically bind the urea thereto to produce a modified polyether polyol.
Inventors
- 👤 Thomas Richardson
- 👤 David M. Burrington
- 👤 Kollengode R. Viswanathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4883; C08G18/50; C08G18/5021; C08G18/5036; C08G18/5042; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33396
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
57 words
A method for making a modified polyether polyol for use in the manufacture of polyurethane polymer having improved fire-resisting qualities, comprising the steps of: (a) reacting a reducing sugar with propylene oxide to produce a polyether polyol; and (b) reacting the polyether polyol with urea to chemically bind the urea thereto to produce a modified polyether polyol.
Claim 2
Independent Claim
57 words
A method for making a modified polyether polyol for use in the manufacture of polyurethane polymer having improved fire-resisting qualities, comprising the steps of: (a) reacting a reducing sugar with propylene oxide to produce a polyether polyol; and (b) reacting the polyether polyol with urea to chemically bind the urea thereto to produce a modified polyether polyol.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the reducing sugar is a sugar selected from the group consisting of lactose, maltose, glucose, galactose, and mixtures thereof.
Claim 4
Dependent Claim
58 words
The method of claim 1 in which the step of reacting the polyether polyol with urea includes mixing urea with the polyether polyol to produce a mixture containing from 5 to 15% by weight of urea and heating the mixture to a temperature between 95° C. and 120° C. until the urea has reacted with the polyether glycol.
Claim 5
Dependent Claim
25 words
The method of claim 3 wherein the reducing sugar is a sugar selected from the group consisting of lactose, maltose, glucose, galactose, and mixtures thereof.
Claim 6
Dependent Claim
50 words
The method of claim 1 wherein the reducing sugar is lactose contained in whey and the method of the invention includes, before the step of reacting a reducing sugar with propylene oxide, the step of preparing dried whey containing lactose having a moisture content from 0 to 15% by weight.
Claim 7
Dependent Claim
74 words
The method of claim 1 wherein the reducing sugar is lactose contained in whey permeate and the method includes, before the step of reacting a reducing sugar with propylene oxide, the steps of: (a) removing whey proteins from whey to produce a whey permeate of reduced protein content; and (b) removing water from the whey permeate to produce a dry whey permeate containing lactose having a water content from 0 to 15% by weight.
Claim 8
Dependent Claim
11 words
The modified polyether polyol produced by the method of claim 1.
Claim 9
Dependent Claim
25 words
A modified polyether polyol for use in the manufacture of polyurethane polymer having improved fire resisting qualities comprising polyether polyol having urea chemically bound thereto.
Claim 10
Dependent Claim
25 words
A modified polyether polyol for use in the manufacture of polyurethane polymer having improved fire resisting qualities comprising polyether polyol having urea chemically bound thereto.
Claim 11
Dependent Claim
18 words
The modified polyether polyol of claim 8 wherein the weight percent of urea is from 5 to 15%.
Claim 12
Independent Claim
63 words
A method for making a polyurethane polymer having improved fire resisting qualities comprising the steps of: (a) reacting or reducing sugar with propylene oxide to produce a polyether polyol; (b) reacting the polyether polyol with urea to chemically bind the urea thereto to produce a modified polyether polyol; (c) reacting the modified polyether polyol with a reactive polyisocyanate to produce a polyurethane polymer.
Claim 13
Independent Claim
63 words
A method for making a polyurethane polymer having improved fire resisting qualities comprising the steps of: (a) reacting or reducing sugar with propylene oxide to produce a polyether polyol; (b) reacting the polyether polyol with urea to chemically bind the urea thereto to produce a modified polyether polyol; (c) reacting the modified polyether polyol with a reactive polyisocyanate to produce a polyurethane polymer.
Claim 14
Dependent Claim
43 words
The method of claim 10 wherein the step of reacting the modified polyether polyol with a reactive polyisocyanate to produce a polyurethane polymer includes foaming the polyurethane polymer as it is produced to make a foamed polyurethane polymer having improved fire resisting qualities.
Claim 15
Dependent Claim
25 words
The method of claim 10 wherein the reducing sugar is a sugar selected from the group consisting of lactose, maltose, glucose, galactose, and mixtures thereof.
Claim 16
Dependent Claim
50 words
The method of claim 10 wherein the reducing sugar is lactose contained in whey and the method of the invention includes, before the step of reacting a reducing sugar with propylene oxide, the step of preparing dried whey containing lactose having a moisture content from 0 to 15% by weight.
Claim 17
Dependent Claim
73 words
The method of claim 10 wherein the reducing sugar is lactose contained in whey permeate and the method includes, before the step of reacting a reducing sugar with propylene oxide, the steps of: (a) removing whey proteins from whey to produce a whey permeate of reduced protein contents; (b) removing water from the whey permeate to produce a dry whey permeate containing lactose having a water content from 0 to 15% by weight.
Claim 18
Dependent Claim
58 words
The method of claim 10 in which the step of reacting the polyether polyol with urea includes mixing urea with the polyether polyol to produce a mixture containing from 5 to 15% by weight of urea and heating the mixture to a temperature between 95° C. and 120° C. until the urea has reacted with the polyether polyol.
Claim 19
Dependent Claim
25 words
The method of claim 15 wherein the reducing sugar is a sugar selected from the group consisting of lactose, maltose, glucose, galactose, and mixtures thereof.
Claim 20
Dependent Claim
10 words
The polyurethane polymer produced by the method of claim 10.
Claim 21
Dependent Claim
16 words
The foamed polyurethane polymer having improved fire resisting qualities produced by the method of claim 11.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |