US4713399A
Expired / Lapsed
US
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Flexible polyurethane foams prepared from poly(alkylene carbonate) polyols
Assignee: Dow Chemical Co
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Filing: 1985-12-30
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Granted: 1987-12-15
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Expires: 2005-12-30
Abstract
Abstract In one aspect, this invention is a polyurethane foam which is the reaction product of a reaction mixture comprising a poly(alkylene carbonate) polyol, a silicone surfactant, a blowing agent, and a polyisocyanate. In another aspect, this invention is an active hydrogen-containing composition comprising a poly(alkylene carbonate) polyol having an equivalent weight from about 100 to about 3000, a blowing agent and a silicone surfactant.
Inventors
- 👤 Daniel D. Webb
- 👤 Donald G. Prier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/44; C08G18/08; C08G18/14; C08G2110/00; C08G2110/0008
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
66 words
A polyurethane foam which is the reaction product of a reaction mixture comprising a poly(alkylene carbonate) polyol, a silicone surfactant, a blowing agent and a polyisocyanate, wherein the poly(alkylene carbonate) polyol is a polymer of an oxirane and carbon dioxide or a cyclic alkylene carbonate, said polymer having a carbon dioxide content of about 5-25% by weight and an equivalent weight from about 100 to 3000.
Claim 2
Dependent Claim
66 words
A polyurethane foam which is the reaction product of a reaction mixture comprising a poly(alkylene carbonate) polyol, a silicone surfactant, a blowing agent and a polyisocyanate, wherein the poly(alkylene carbonate) polyol is a polymer of an oxirane and carbon dioxide or a cyclic alkylene carbonate, said polymer having a carbon dioxide content of about 5-25% by weight and an equivalent weight from about 100 to 3000.
Claim 3
Dependent Claim
29 words
The foam of claim 1 wherein the reaction mixture contains from 0.1 to about 5 parts by weight of said surfactant per 100 parts of said poly(alkylene carbonate) polyol.
Claim 4
Dependent Claim
17 words
The foam of claim 2 wherein the blowing agent comprises water, a halogenated methane, or mixture thereof.
Claim 5
Dependent Claim
32 words
The foam of claim 3 wherein the poly(alkylene carbonate) polyol has an equivalent weight from about 500 to about 2000 and contains about 10 to about 20 percent by weight carbon dioxide.
Claim 6
Dependent Claim
17 words
The foam of claim 4 wherein the polyisocyante comprises toluenediisocyanate, diphenylmethanedisioscyanate, or mixtures, derivatives or prepolymers thereof.
Claim 7
Independent Claim
66 words
A method of preparing a flexible polyurethane foam, comprising reacting a poly(alkylene carbonate) polyol with a polyisocyanate in the presence of a blowing agent and a block copolymer containing a polysiloxane and a polyether block, wherein the poly(alkylene carbonate) polyol is a polymer of an oxirane and carbon dioxide or a cyclic alkylene carbonate, said polymer having a carbon dioxide content of about 5-25% by weight.
Claim 8
Independent Claim
66 words
A method of preparing a flexible polyurethane foam, comprising reacting a poly(alkylene carbonate) polyol with a polyisocyanate in the presence of a blowing agent and a block copolymer containing a polysiloxane and a polyether block, wherein the poly(alkylene carbonate) polyol is a polymer of an oxirane and carbon dioxide or a cyclic alkylene carbonate, said polymer having a carbon dioxide content of about 5-25% by weight.
Claim 9
Dependent Claim
54 words
The method of claim 6 wherein said surfactant is represented by the structure: ##STR4## wherein R' is --C 3 H 6 O(C n H 2n O) m CH 3 , R" is --C n H 2n CN, Me is a methyl group and a, b, c, d, e, m and n are positive number.
Claim 10
Dependent Claim
17 words
The method of claim 7 wherein said blowing agent comprises water, a halogenated methane or mixture thereof.
Claim 11
Dependent Claim
26 words
The method of claim 8 which contains, per 100 parts of said poly(alkylene carbonate) polyol, about 0.1 to about 5 parts by weight of said surfactant.
Claim 12
Dependent Claim
54 words
An active hydrogen-containing composition comprising a poly(alkylene carbonate) polyol which is the reaction product of an oxirane and carbon dioxide or cyclic alkylene carbonate, said polymer having a carbon dioxide content of about 5-25% by weight and an equivalent weight of from about 100 to about 3000, a blowing agent and a silicone surfactant.
Claim 13
Dependent Claim
54 words
An active hydrogen-containing composition comprising a poly(alkylene carbonate) polyol which is the reaction product of an oxirane and carbon dioxide or cyclic alkylene carbonate, said polymer having a carbon dioxide content of about 5-25% by weight and an equivalent weight of from about 100 to about 3000, a blowing agent and a silicone surfactant.
Claim 14
Dependent Claim
20 words
The active hydrogen-containing composition of claim 10 wherein said blowing agent comprises water, a halogenated methane or a mixture thereof.
Claim 15
Dependent Claim
28 words
The active hydrogen-containing composition of claim 11 which contains, per 100 parts of said poly(alkylene carbonate) polyol, about 0.1 to about 5 parts by weight of said surfactant.
Claim 16
Dependent Claim
34 words
The active hydrogen-containing composition of claim 12 wherein said poly(alkylene carbonate) polyol has an equivalent weight from about 500 to about 2000 and contains about 10 to about 20 percent by weight carbon dioxide.
References Cited (Backward Citations)
US3312653A
Cited
US4554295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |