US4451588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High load bearing polyurethane foams made from mixed initiator polyether polyols
Assignee: Dow Chemical Co
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Filing: 1983-07-26
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Granted: 1984-05-29
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Expires: 2003-07-26
Abstract
Abstract High load bearing flexible polyurethane foams are made using novel polyether polyols which may be made by alkoxylating a mixture of initiators. The initiator mixture is made up of about 60 to 90 wt. % of a partially alkoxylated trifunctional initiator and 10 to 40 wt. % of a secondary partially alkoxylated initiator having an active hydrogen functionality of from 4 to 8. Preferably, the alkylene oxide component to be reacted with the initiator mixture is a blend of ethylene oxide and propylene oxide.
Inventors
- 👤 George P. Speranza
- 👤 Michael Cuscurida
- 👤 Bruce W. Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/4816; C08G18/4829; Y; Y10; Y10S; Y10S521/00; Y10S521/914
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
95 words
A method for producing a flexible polyurethane foam having improved load bearing properties comprising reacting an organic polyisocyanate with a mixed initiator polyether polyol in the presence of a catalytic amount of a polyurethane formation catalyst and a blowing agent, where the polyol is made by reacting a. one or more alkylene oxides with b. a mixture of initiators consisting essentially of (1) 60 to 90 wt.% of a trifunctional partially alkoxylated initiator, and (2) 10 to 40 wt.% of a secondary partially alkoxylated initiator having an active hydrogen functionality of from 4 to 8.
Claim 2
Independent Claim
95 words
A method for producing a flexible polyurethane foam having improved load bearing properties comprising reacting an organic polyisocyanate with a mixed initiator polyether polyol in the presence of a catalytic amount of a polyurethane formation catalyst and a blowing agent, where the polyol is made by reacting a. one or more alkylene oxides with b. a mixture of initiators consisting essentially of (1) 60 to 90 wt.% of a trifunctional partially alkoxylated initiator, and (2) 10 to 40 wt.% of a secondary partially alkoxylated initiator having an active hydrogen functionality of from 4 to 8.
Claim 3
Dependent Claim
33 words
The method of claim 1, in which in the making of the polyol, the alkylene oxide used is selected from the group consisting of ethylene oxide, propylene oxide, 1,2-butylene oxide and mixtures thereof.
Claim 4
Dependent Claim
59 words
The method of claim 1, in which in the making of the polyol, the trifunctional initiator is an alkylene oxide adduct of a triol selected from the group consisting of glycerine, trimethylolpropane and triethanolamine and in which the secondary initiator is an alkylene oxide adduct of a polyol selected from the group consisting of methyl glycoside, sorbitol and sucrose.
Claim 5
Dependent Claim
23 words
The method of claim 1 in which the mixed initiator polyether polyol has a molecular weight in the range from 1,000 to 20,000.
Claim 6
Dependent Claim
38 words
The method of claim 1 in which the mixed initiator polyether polyol is made at a temperature in the range from about 75° to 150° C. and in the presence of a catalytic amount of an alkaline catalyst.
Claim 7
Dependent Claim
20 words
The method of claim 1 in which the ratio of equivalents of NCO groups to OH groups is about 1:1.
Claim 8
Dependent Claim
92 words
A flexible polyurethane foam having improved load bearing properties made by reacting an organic polyisocyanate with a mixed initiator polyether polyol in the presence of a catalytic amount of a polyurethane formation catalyst and a blowing agent, where the polyol is made by reacting a. one or more alkylene oxides with b. a mixture of initiators consisting essentially of (1) 60 to 90 wt.% of a trifunctional partially alkoxylated initiator, and (2) 10 to 40 wt.% of a secondary partially alkoxylated initiator having an active hydrogen functionality of from 4 to 8.
Claim 9
Dependent Claim
92 words
A flexible polyurethane foam having improved load bearing properties made by reacting an organic polyisocyanate with a mixed initiator polyether polyol in the presence of a catalytic amount of a polyurethane formation catalyst and a blowing agent, where the polyol is made by reacting a. one or more alkylene oxides with b. a mixture of initiators consisting essentially of (1) 60 to 90 wt.% of a trifunctional partially alkoxylated initiator, and (2) 10 to 40 wt.% of a secondary partially alkoxylated initiator having an active hydrogen functionality of from 4 to 8.
Claim 10
Dependent Claim
36 words
The flexible polyurethane foam of claim 7, in in which in the making of the polyol, the alkylene oxide used is selected from the group consisting of ethylene oxide, propylene oxide, 1,2-butylene oxide and mixtures thereof.
Claim 11
Dependent Claim
61 words
The flexible polyurethane foam of claim 7, in which in the making of the polyol, the trifunctional initiator is an alkylene oxide adduct of a triol selected from the group consisting of glycerine, trimethylolpropane and triethanolamine and in which the secondary initiator is an alkylene oxide adduct of a polyol selected from the group consisting of methyl glycoside, sorbitol and sucrose.
Claim 12
Dependent Claim
25 words
The flexible polyurethane foam of claim 7 in which the mixed initiator polyether polyol has a molecular weight in the range from 1,000 to 20,000.
Claim 13
Dependent Claim
40 words
The flexible polyurethane foam of claim 7 in which the mixed initiator polyether polyol is made at a temperature in the range from about 75° to 150° C. and in the presence of a catalytic amount of an alkaline catalyst.
Claim 14
Dependent Claim
22 words
The flexible polyurethane foam of claim 7 in which the ratio of equivalents of NCO groups to OH groups is about 1:1.
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |