Patent US4296213A successfully refreshed from Google Patents.
US4296213A
Expired / Lapsed
US
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Polyurethane foams using a polyurea polymer polyol
Assignee: Dow Chemical Co
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Filing: 1980-10-31
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Granted: 1981-10-20
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Expires: 2000-10-31
Abstract
Abstract A polyurea polymer polyol made by the reaction of a hydroxyl-containing amine, a polyether polyol of about 3,000 to 8,000 molecular weight and an organic polyisocyanate is disclosed. This polyurea polymer polyol may be used in the manufacture of flexible polyurethane foams which are firmer and stronger than similar products using conventional polyols.
Inventors
- 👤 Michael Cuscurida
- 👤 George P. Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6688; C08G18/08; C08G18/10; C08G18/12; C08G18/40; C08G18/409; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
A polyurea polymer polyol made by the reaction of a hydroxyl-containing amine, a polyether polyol of about 3000 to 8000 molecular weight and an organic polyisocyanate wherein the ratio of moles of hydroxyl containing amine to moles of polyether polyol ranges from about 0.5 to 3.5 and the ratio of moles of active hydrogens to moles of isocyanate groups ranges from about 1.4 to 3.5.
Claim 2
Dependent Claim
65 words
A polyurea polymer polyol made by the reaction of a hydroxyl-containing amine, a polyether polyol of about 3000 to 8000 molecular weight and an organic polyisocyanate wherein the ratio of moles of hydroxyl containing amine to moles of polyether polyol ranges from about 0.5 to 3.5 and the ratio of moles of active hydrogens to moles of isocyanate groups ranges from about 1.4 to 3.5.
Claim 3
Dependent Claim
12 words
A polyol as in claim 1 wherein the hydroxyl-containing amine is monoethanolamine.
Claim 4
Dependent Claim
12 words
A polyol as in claim 1 wherein the hydroxyl-containing amine is diethanolamine.
Claim 5
Dependent Claim
12 words
A polyol as in claim 1 wherein the hydroxyl-containing amine is 2-(2-aminoethoxyethanol).
Claim 6
Dependent Claim
12 words
A polyol as in claim 1 wherein the hydroxyl-containing amine is hydroxyethylpiperazine.
Claim 7
Independent Claim
76 words
A method for producing a polyurethane which comprises first making a polyurea polymer polyol by reacting a hydroxyl-containing amine, a polyether polyol and an organic polyisocyanate wherein the ratio of moles of hydroxyl containing amine to moles of polyether polyol ranges from about 0.5 to 3.5 and the ratio of moles of active hydrogens to moles of isocyanate groups ranges from about 1.4 to 3.5 and then reacting said polyurea polymer polyol with an organic polyisocyanate.
Claim 8
Independent Claim
76 words
A method for producing a polyurethane which comprises first making a polyurea polymer polyol by reacting a hydroxyl-containing amine, a polyether polyol and an organic polyisocyanate wherein the ratio of moles of hydroxyl containing amine to moles of polyether polyol ranges from about 0.5 to 3.5 and the ratio of moles of active hydrogens to moles of isocyanate groups ranges from about 1.4 to 3.5 and then reacting said polyurea polymer polyol with an organic polyisocyanate.
Claim 9
Dependent Claim
12 words
A method as in claim 6 wherein the hydroxyl-containing amine is monoethanolamine.
Claim 10
Dependent Claim
12 words
A method as in claim 6 wherein the hydroxyl-containing amine is diethanolamine.
Claim 11
Dependent Claim
12 words
A method as in claim 6 wherein the hydroxyl-containing amine is 2-(2-aminoethoxyethanol).
Claim 12
Dependent Claim
12 words
A method as in claim 6 wherein the hydroxyl-containing amine is hydroxyethylpiperazine.
Claim 13
Dependent Claim
24 words
A method as in claim 6 wherein the polyurea polymer polyol is reacted with an organic polyisocyanate in the presence of another polyether polyol.
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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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |