US4670477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing in situ reticulated polyurethane foam
Assignee: Foamex LP
•
Filing: 1986-01-09
•
Granted: 1987-06-02
•
Expires: 2006-01-09
Abstract
Abstract An improved process for in situ production of a reticulated, open-cell polyurethane foam which comprises reacting a polyester/polyether polyol mixture with an aromatic polyisocyanate having a ratio of isocyanate moieties to aromatic moieties of about 2:1 in the presence of a catalyst and a blowing agent, the improvement comprises: said polyol mixture being (a) 80 to 95 parts by weight of polyester polyol and (b) 20 to 5 parts by weight of polyoxypropylene polyether polyol or a mixed poly(oxyethylene/oxypropylene polyether polyol, each having at least one polymer of ethylenically unsaturated monomers dispersed therein and a stabilizing surfactant for polyether polyurethane foam, and said process produces a polyurethane foam which has excellent strength properties and an exceeding low resistance to air flow.
Inventors
- 👤 David J. Kelly
- 👤 Paul J. Cacciatore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:54
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4018; C08G18/4072; C08G2110/00; C08G2110/0041; C08G2110/005; C08J2375/00; C08J2375/04; C08J2425/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
110 words
In an improved process for in situ production of a reticulated open-cell polyurethane foam which comprises reacting a polyester/polyether polyol mixture with an aromatic polyisocyanate having a ratio of isocyanate moieties to aromatic moieties of about 2:1 in the presence of a catalyst and a blowing agent, the improvement comprises: said polyol mixture being (a) 80 to 95 parts by weight of the mixture of a polyester polyol and (b) 20 to 5 parts by weight of polyoxypropylene polyether polyol or a mixed poly(oxyethylene/oxypropylene) polyether polyol, having at least one of a polyurea or a polymer of ethylenically unsaturated monomers dispersed therein and a stabilizing surfactant for polyether polyurethane foam.
Claim 2
Dependent Claim
110 words
In an improved process for in situ production of a reticulated open-cell polyurethane foam which comprises reacting a polyester/polyether polyol mixture with an aromatic polyisocyanate having a ratio of isocyanate moieties to aromatic moieties of about 2:1 in the presence of a catalyst and a blowing agent, the improvement comprises: said polyol mixture being (a) 80 to 95 parts by weight of the mixture of a polyester polyol and (b) 20 to 5 parts by weight of polyoxypropylene polyether polyol or a mixed poly(oxyethylene/oxypropylene) polyether polyol, having at least one of a polyurea or a polymer of ethylenically unsaturated monomers dispersed therein and a stabilizing surfactant for polyether polyurethane foam.
Claim 3
Dependent Claim
12 words
The process according to claim 1 wherein the polyisocyanate is toluene diisocyanate.
Claim 4
Dependent Claim
22 words
The process according to claim 1 wherein the polyether polyol (b) amounts to about 10 parts by weight of the polyol mixture.
Claim 5
Dependent Claim
21 words
The process according to claim 1 wherein the polyether polyol is a polyoxypropylene polyether polyol into which is dispersed poly(styrene coacrylonitrile).
Claim 6
Dependent Claim
21 words
The process according to claim 1 wherein the polyether polyol is a poly(oxyethylene/oxypropylene) polyether polyol into which is dispersed poly(styrene coacrylonitrile).
Claim 7
Dependent Claim
20 words
The process according to claim 1 wherein the polyether polyol is a poly(oxyethylene/oxypropylene) polyether polyol into which is dispersed polyurea.
Claim 8
Dependent Claim
20 words
The process according to claim 1 wherein the polyether polyol is a poly(oxypropylene) polyether polyol into which is dispersed polyurea.
Claim 9
Dependent Claim
107 words
In an improved process for in situ production of a reticulated open-cell polyurethane foam which comprises reacting a polyester/polyether polyol mixture with an aromatic polyisocyanate having a ratio of isocyanate moieties to aromatic moieties of about 2:1 in the presence of a catalyst and a blowing agent, the improvement comprises: said polyol mixture being (a) 80 to 95 parts by weight of the mixture of a polyester polyol and (b) 20 to 5 parts by weight of polyoxypropylene polyether polyol or a mixed poly(oxyethylene/oxypropylene) polyether polyol, having at least one of polystyrene, polyacrylonitrile, polyurea or poly(styrene coacrylonitrile) dispersed therein and a stabilizing surfactant for polyether polyurethane foam.
Claim 10
Dependent Claim
107 words
In an improved process for in situ production of a reticulated open-cell polyurethane foam which comprises reacting a polyester/polyether polyol mixture with an aromatic polyisocyanate having a ratio of isocyanate moieties to aromatic moieties of about 2:1 in the presence of a catalyst and a blowing agent, the improvement comprises: said polyol mixture being (a) 80 to 95 parts by weight of the mixture of a polyester polyol and (b) 20 to 5 parts by weight of polyoxypropylene polyether polyol or a mixed poly(oxyethylene/oxypropylene) polyether polyol, having at least one of polystyrene, polyacrylonitrile, polyurea or poly(styrene coacrylonitrile) dispersed therein and a stabilizing surfactant for polyether polyurethane foam.
Claim 11
Dependent Claim
12 words
The process according to claim 8 wherein the polyisocyanate is toluene diisocyanate.
Claim 12
Dependent Claim
22 words
The process according to claim 8 wherein the polyether polyol (b) amounts to about 10 parts by weight of the polyol mixture.
Claim 13
Dependent Claim
21 words
The process according to claim 8 wherein the polyether polyol is a polyoxypropylene polyether polyol into which is dispersed poly(styrene coacrylonitrile).
Claim 14
Dependent Claim
21 words
The process according to claim 8 wherein the polyether polyol is a poly(oxyethylene/oxypropylene) polyether polyol into which is dispersed poly(styrene coacrylonitrile).
Claim 15
Dependent Claim
20 words
The process according to claim 8 wherein the polyether polyol is a poly(oxyethylene/oxypropylene) polyether polyol into which is dispersed polyurea.
Claim 16
Dependent Claim
20 words
The process according to claim 8 wherein the polyether polyol is a poly(oxypropylene) polyether glycol into which is dispersed polyurea.
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |