Patent US3453722A successfully refreshed from Google Patents.
Patent US4288559A successfully refreshed from Google Patents.
US4288559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame resistant foam
Assignee: Bayer AG
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Filing: 1979-11-01
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Granted: 1981-09-08
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Expires: 1999-11-01
Abstract
Abstract The instant invention is directed to a process for the production of flame resistant foams by the impregnation of polyurethane foams with a dispersion consisting substantially of an aluminum hydroxide, a polyurethane latex, an alumino-silicate and surface active substances which results in foams having very desirable mechanical properties as well as excellent flame resistant properties.
Inventors
- 👤 Hans-Walter Illger
- 👤 Manfred Dahm
- 👤 Alberto C. Gonzalez-Dorner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:49
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; C08J2201/00; C08J2201/02; C08J2201/038; C08J2475/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
24 words
A flame resistant foam-impregnated with a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances.
Claim 2
Dependent Claim
24 words
A flame resistant foam-impregnated with a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances.
Claim 3
Dependent Claim
69 words
A flame resistant foam of claim 1, wherein (a) the foam used for impregnation has a density of from 10 to 100 kg/m 3 ; (b) the impregnated foam has an uptake of solids content of from 10% to 800%, preferably of from 15% to 500% of the original weight of the foam; and contains from 10% to 95% by weight of aluminum hydroxide, based on the total weight.
Claim 4
Dependent Claim
23 words
A flame resistant foam as claimed in claim 1, wherein said dispersion has a solids content of from 25 to 80% by weight.
Claim 5
Dependent Claim
23 words
A flame resistant foam as claimed in claim 1, wherein said dispersion has a solids content of from 35 to 65% by weight.
Claim 6
Dependent Claim
35 words
A flame resistant foam as claimed in claim 1, wherein said polyurethane latex component of said dispersion has a solids content of from 1 to 20% by weight based on the weight of said dispersion.
Claim 7
Dependent Claim
35 words
A flame resistant foam as claimed in claim 1, wherein said polyurethane latex component of said dispersion has a solids content of from 2 to 15% by weight based on the weight of said dispersion.
Claim 8
Dependent Claim
34 words
A flame resistant foam as claimed in claim 1, wherein said aluminum hydroxide component of said dispersion has a particle size of <100μ and a water content of up to about 35% by weight.
Claim 9
Dependent Claim
33 words
A flame resistant foam as claimed in claim 1, wherein said aluminum hydroxide component of said dispersion is used in amounts of from 15 to 75% by weight based on said dispersion's weight.
Claim 10
Dependent Claim
33 words
A flame resistant foam as claimed in claim 1, wherein said aluminum hydroxide component of said dispersion is used in amounts of from 30 to 60% by weight based on said dispersion's weight.
Claim 11
Dependent Claim
65 words
A flame resistant foam as claimed in claim 1, wherein said aluminosilicate is used in amounts of from 0.1 to 5% by weight based on said dispersion's weight and the surface active substances such as ethoxylated alkyl phenols and/or sulphonated wetting agents such as alkyl sulphonates of said dispersion are used in amounts of from 1 to 20% by weight, based on said dispersion's weight.
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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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |