US3755211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latex reinforced flexible polyurethane foam
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1971-10-07
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Granted: 1973-08-28
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Expires: 1991-10-07
Abstract
Abstract This invention comprises the production of low density flexible polyurethane foams having improved load carrying capacity by adding to the unfoamed mixture, comprising a polyhydroxy compound, an organic polyisocyanate and water, a polymer in the form of an unfoamed latex of about 30 to 65 percent solids content, the latex polymer having a glass transition temperature of at least 50* C. and having a particle size in the range of from about 200 to 800 angstroms, any other latex polymer particles outside said range being present in minor amounts.
Inventors
- 👤 H Fabris
- 👤 E Maxey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:16
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
20 words
The process of claim 1 including a gas reaction catalyst with said organic polyisocyanate, said water, and said polyhydroxy compound.
Claim 2
Dependent Claim
19 words
The process of claim 1 including a foam stabilizer with said organic polyisocyanate, said water and said polyhydroxy compound.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said polymer is selected from the group consisting of polymethylmethacrylate, polystyrene and vinyl-chloride-acrylate copolymers.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein said water is present in the amount of about 4 parts per weight per one hundred parts of polyhydroxy compound.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein said flexible cellular product has a density of from 1 to 3 pounds per cubic foot.
Claim 6
Dependent Claim
156 words
In the process of preparing flexible cellular products from: a an organic polyisocyanate, b water and c a polyhydroxy compound having a molecular weight from about 1, 000 to 6,000 and being selected from the group consisting of polyester polyols and polyether polyols; the steps which comprise (1) incorporating into the reaction mass, prior to the formation of the cellular product, from about 1 to 20 parts by weight per one hundred parts of polyhydroxy compound of polymer having a glass transition temperature of at least 50* C., said polymer being in the form of an unfoamed latex of up to about 65 percent solids content, said latex polymer having a particle size in the range of from about 200 to 800 angstroms, any other latex polymer particles outside said range being present in minor amounts, and (2) stripping part of the water from said unfoamed reaction mass prior to the formation of the cellular product.
Claim 7
Dependent Claim
20 words
The process of claim 8 wherein said polymer is selected from the group consisting of polymethylmethacrylates, polystyrene and vinyl-chloride-acrylate copolymers.
Claim 8
Dependent Claim
26 words
The process of claim 8 wherein said water is present in the amount of about 4 parts by weight per one hundred parts of polyhydroxy compound.
Claim 9
Dependent Claim
22 words
The process of claim 8 wherein the density of said flexible cellular product is between 1 to 3 pounds per cubic foot.
References Cited (Backward Citations)
US2993013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |