Patent US4435527A successfully refreshed from Google Patents.
US4435527A
Expired / Lapsed
US
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Polyester polymer polyols made with polyester polycarbonates and polyurethanes therefrom
Assignee: Dow Chemical Co
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Filing: 1983-01-24
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Granted: 1984-03-06
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Expires: 2003-01-24
Abstract
Abstract A polyester polymer polyol made by the reaction of a polyester polycarbonate, a polyether polyol and an organic polyisocyanate is described. The polyester polycarbonate may have a molecular weight of about 250 to 1,000. The polyether polyol may have a molecular weight of about 3,000 to 8,000. This polyester polymer polyol may be used in the manufacture of flexible polyurethane foams which are characterized by good load bearing properties as well as good water absorption and retention properties. Foams made from these polymer polyols show a lesser tendency to yellow than those made from prior art polyols and polymer polyols.
Inventors
- 👤 Michael Cuscurida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:44
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4018; C08G18/08; C08G18/10; C08G18/12; C08G18/42; C08G18/44; C08G63/00; C08G63/64; C08G63/66; C08G63/668; C08G63/672; C08G63/91; C08G63/914
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
A polyester polymer polyol made by the reaction of a polyester polycarbonate, a polyether polyol and an organic polyisocyanate wherein the combined portion of polyester polycarbonate and polyisocyanate is 10 to 40 wt. % of the polyether polyol portion, and the ratio of equivalents of polyester groups to equivalents of isocyanate groups ranges from 0.5 to 2.0.
Claim 2
Dependent Claim
57 words
A polyester polymer polyol made by the reaction of a polyester polycarbonate, a polyether polyol and an organic polyisocyanate wherein the combined portion of polyester polycarbonate and polyisocyanate is 10 to 40 wt. % of the polyether polyol portion, and the ratio of equivalents of polyester groups to equivalents of isocyanate groups ranges from 0.5 to 2.0.
Claim 3
Dependent Claim
23 words
The polyester polymer polyol of claim 1 wherein the polyether polyol has a molecular weight in the range of about 3,000 to 8,000.
Claim 4
Dependent Claim
23 words
The polyester polymer polyol of claim 1 wherein the polyester polycarbonate has a molecular weight in the range of about 250 to 1,000.
Claim 5
Independent Claim
75 words
A method for producing a polyurethane which comprises first making a polyester polymer polyol by reacting a polyester polycarbonate, a polyether polyol and an organic polyisocyanate wherein the combined portion of polyester polycarbonate and polyisocyanate is 10 to 40 wt. % of the polyether polyol portion and the ratio of equivalents of polyester groups to equivalents of isocyanate groups ranges from 0.5 to 2.0 and then reacting said polyester polymer polyol with an organic polyisocyanate.
Claim 6
Independent Claim
75 words
A method for producing a polyurethane which comprises first making a polyester polymer polyol by reacting a polyester polycarbonate, a polyether polyol and an organic polyisocyanate wherein the combined portion of polyester polycarbonate and polyisocyanate is 10 to 40 wt. % of the polyether polyol portion and the ratio of equivalents of polyester groups to equivalents of isocyanate groups ranges from 0.5 to 2.0 and then reacting said polyester polymer polyol with an organic polyisocyanate.
Claim 7
Dependent Claim
21 words
The method of claim 4 wherein the polyether polyol has a molecular weight in the range of about 3,000 to 8,000.
Claim 8
Dependent Claim
21 words
The method of claim 4 wherein the polyester polycarbonate has a molecular weight in the range of about 250 to 1,000.
References Cited (Backward Citations)
US4165423A
Cited
US4267120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |