Patent US4342798A successfully refreshed from Google Patents.
US4342798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of flame resistant foam
Assignee: Bayer AG
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Filing: 1981-05-15
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Granted: 1982-08-03
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Expires: 2001-05-15
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 aluminosilicate 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
2026-11-05 23:17
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: 13
Claim 1
Independent Claim
34 words
A process for the production of a flame resistant foam comprising spraying said foam with a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances.
Claim 2
Dependent Claim
34 words
A process for the production of a flame resistant foam comprising spraying said foam with a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances.
Claim 3
Dependent Claim
38 words
A process according to claim 1, characterized in that said polyurethane latices, in their homogeneous form, have a hardness of from a Shore A hardness of at least 5 to a Pendulum hardness of no more than 240.
Claim 4
Dependent Claim
15 words
A process according to claim 1, characterized in that said foam is a polyurethane foam.
Claim 5
Dependent Claim
15 words
A process according to claim 1, characterized in that said impregnation is carried out continuously.
Claim 6
Dependent Claim
45 words
A process for the production of a flame resistant foam comprising applying a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances to said foam using a vacuum means to suck into said foam said dispersion.
Claim 7
Dependent Claim
45 words
A process for the production of a flame resistant foam comprising applying a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances to said foam using a vacuum means to suck into said foam said dispersion.
Claim 8
Dependent Claim
38 words
A process according to claim 5, characterized in that said polyurethane latices, in their homogeneous form, have a hardness of from a Shore A hardness of at least 5 to a Pendulum hardness of no more than 240.
Claim 9
Dependent Claim
15 words
A process according to claim 5, characterized in that said foam is a polyurethane foam.
Claim 10
Dependent Claim
39 words
A process for the production of a flame resistant foam comprising applying a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances to said foam using a doctor blade means.
Claim 11
Dependent Claim
39 words
A process for the production of a flame resistant foam comprising applying a dispersion comprising: (a) a polyurethane latex; (b) an aluminum hydroxide; (c) an aluminosilicate and (d) surface active substances to said foam using a doctor blade means.
Claim 12
Dependent Claim
38 words
A process according to claim 8, characterized in that said polyurethane latics, in their homogeneous form, have a hardness of from a Shore A hardness of at least 5 to a Pendulum hardness of no more than 240.
Claim 13
Dependent Claim
15 words
A process according to claim 8, characterized in that said foam is a polyurethane 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) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |