US4554295A
Expired / Lapsed
US
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Method for preparing flexible polyurethane foams from polymer/polyols and improved polyurethane foam product
Assignee: EASTERN FOAM PRODUCTS Inc A CORP OF
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Filing: 1983-07-13
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Granted: 1985-11-19
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Expires: 2003-07-13
Abstract
Abstract A process for preparing a predominately closed cell foam having an improved load bearing resiliency together with the improved polyurethane foam product, the process comprising co-reacting a fluid high-solids polymer/polyol and an organic polyisocyanate in the presence of an organo-tin catalyst, a tertiary amine catalyst, a blowing agent, a silicone-oxyalkylene surfactant and a critical amount of a filled diorganosilicone oil anti-foaming agent.
Inventors
- 👤 Charles A. Ridge, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:52
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08J9/0066; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
63 words
An improved process for preparing flexible polyurethane foams by the one-shot technique comprising co-reacting a fluid high-solids polymer/polyol and an organic polyisocyanate in the presence of an organo-tin catalyst, a tertiary amine catalyst, a blowing agent, a silicone-oxyalkylene surfactant and an amount of a filled diorganosilicone oil anti-foaming agent necessary to produce a predominately closed cell foam having an improved loas bearing resiliency.
Claim 2
Dependent Claim
63 words
An improved process for preparing flexible polyurethane foams by the one-shot technique comprising co-reacting a fluid high-solids polymer/polyol and an organic polyisocyanate in the presence of an organo-tin catalyst, a tertiary amine catalyst, a blowing agent, a silicone-oxyalkylene surfactant and an amount of a filled diorganosilicone oil anti-foaming agent necessary to produce a predominately closed cell foam having an improved loas bearing resiliency.
Claim 3
Dependent Claim
37 words
The process of claim 1 wherein the diorganosilicone oil has the formula --R 2 SiO] n where n is greater than 1 and R is selected from the group consisting of substituted and unsubtituted monovalent hydrocarbon groups.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein R is an unsubstituted hydrocarbon selected from the group consisting of methly, ethyl and phenyl.
Claim 5
Dependent Claim
20 words
The process of claim 2 wherein R is a substituted hydrocarbon selected from the group consisting of trifluoropropyl and trichoroethyl.
Claim 6
Dependent Claim
12 words
The process of claim 2 wherein the diorganosilicone oil is a polydimethylsilicone.
Claim 7
Dependent Claim
30 words
The process of claim 1 wherein the filled diorganosilicone oil contains an inert filler selected from the group consisting of silica, and the oxides of zinc, magnesium, aluminum, and titanium.
Claim 8
Dependent Claim
30 words
The process of claim 2 wherein the filled diorganosilicone oil contains an inert filler selected from the group consisting of silica, and the oxides of zinc, magnesium, aluminum, and titanium.
Claim 9
Dependent Claim
16 words
The process of claim 1 wherein a silica-filled polydimethylsilicone is used as the filled diorganosilicone oil.
Claim 10
Dependent Claim
25 words
The process of claim 1 wherein the filled diorganosilicone oil anti-foaming agent comprises about 0.02 percent to about 0.1 percent by weight on the polymer/polyol.
Claim 11
Dependent Claim
26 words
The process of claim 9 wherein the filled diorganosilicone oil anti-foaming agent comprises about 0.03 percent to about 0.08 percent by weight based on the polymer/polyol.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the silicone-oxyalkylene surfactant comprises about 0.1 percent to about 5.0 percent by weight based on the polymer/polyol.
Claim 13
Dependent Claim
23 words
The process of claim 9 wherein the silicone-oxyalkylene surfactant comprises about 0.75 percent to about 1.25 percent by weight based on the polymer/polyol.
Claim 14
Dependent Claim
27 words
The process of claim 1 wherein the high-solids polymer/polyol contains polymerized ethylenically unsaturated monomer selected from the group consisting of acrylonitrile and mixtures of styrene and acrylonitrile.
Claim 15
Dependent Claim
20 words
The process of claim 13 wherein the polymer content of the high solids polymer/polyol is above about 30% by weight.
Claim 16
Dependent Claim
14 words
The process of claim 1 wherein the high solids polymer/polyol includes additional blended polyol.
Claim 17
Dependent Claim
14 words
The process of claim 14 wherein the high solids polymer/polyol includes additional blended polyol.
Claim 18
Dependent Claim
128 words
A predominately closed cell, flexible polyurethane foam having improved load bearing resiliency as obtained by reacting a fluid high-solids polymer/polyol and an organic polyisocyanate in the presence of a silicone-oxyalkylene surfactant and a filled diorganosilicone oil, said foam consiting essentially of a reaction product of said high-solids polymer/polyol and said organic polyisocyanate and having substantially a bivariate cell size distribution of large cells and small cells, wherein said large cells have average diameters between about 1.50 mm and about 7 mm, occur at any cross-section of said foam at a density of about 50 to about 200 cells per square inch of said foam, and are randomly distributed throughout a substantially continuous matrix of said small cells, said small cells having average diameters less than about 1.25 mm.
Claim 19
Dependent Claim
128 words
A predominately closed cell, flexible polyurethane foam having improved load bearing resiliency as obtained by reacting a fluid high-solids polymer/polyol and an organic polyisocyanate in the presence of a silicone-oxyalkylene surfactant and a filled diorganosilicone oil, said foam consiting essentially of a reaction product of said high-solids polymer/polyol and said organic polyisocyanate and having substantially a bivariate cell size distribution of large cells and small cells, wherein said large cells have average diameters between about 1.50 mm and about 7 mm, occur at any cross-section of said foam at a density of about 50 to about 200 cells per square inch of said foam, and are randomly distributed throughout a substantially continuous matrix of said small cells, said small cells having average diameters less than about 1.25 mm.
Claim 20
Dependent Claim
12 words
The foam of claim 17 wherein the diorganosilicone oil is a polydimethylsilicone.
Claim 21
Dependent Claim
13 words
The foam of claim 19 wherein the polydimethylsilicone contains an inert silica filler.
Claim 22
Dependent Claim
28 words
The foam of claim 17 wherein the high solids polymer/polyol contains poymerized ethylenically unsaturated monomer selected from the group consisting of acrylonitrile and mixtures of styrene and acylonitrile.
Claim 23
Dependent Claim
22 words
The foam of claim 17 wherein the cells of said foam have struts with a thicknes of at least about 0.25 mm.
Claim 24
Dependent Claim
35 words
The foam of claim 22 wherein a major portion of the large cells have average diameter above about 1.75 mm and a major portion of the small cells have average diameters below about 1.0 mm.
Claim 25
Dependent Claim
32 words
The foam of claim 17 wherein the large cells occur at any cross-section of said foam at a density between about 75 to about 150 cells per square inch of said foam.
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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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |