Patent US4442157A successfully refreshed from Google Patents.
US4442157A
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US
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Fireproofing composition and door rabbet coated therewith
Assignee: BASF SE
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Filing: 1980-12-29
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Granted: 1984-04-10
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Expires: 2000-12-29
Abstract
Abstract Heat-foamable fireproofing compositions contain thermosetting phenolic resins, thermally decomposable organic nitrogen compounds, eg. dicyandiamide, an ammonium salt and a carbohydrate or polyhydric alcohol, and on decomposition form a stiff carbonaceous foam.
Inventors
- 👤 Hans-Norbert Marx
- 👤 Reimer Gottsche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:49
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/18; C09D5/185; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C09K; C09K21/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/2462; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A mechanically stable fireproofing composition which is heat-formable to more than 10 times its original volume to form a mechanically stable insulating layer and which consists essentially of (a) from 15 to 40% by weight of a phenolic resin, which is thermosetting by itself, (b) from 25 to 45% by weight of an ammonium salt, (c) from 10 to 20% by weight of a carbohydrate and/or a polyhydric alcohol, (d) from 15 to 40% of a thermally decomposable organic nitrogen compound, selected from the group consisting of urea, melamine, and dicyandiamide, and (e) from 1 to 10% of a binder from the group consisting of the water-soluble, solvent-soluble and water-dispersible vinyl polymers, the percentages given being based on the solids content of the composition.
Claim 2
Dependent Claim
124 words
A mechanically stable fireproofing composition which is heat-formable to more than 10 times its original volume to form a mechanically stable insulating layer and which consists essentially of (a) from 15 to 40% by weight of a phenolic resin, which is thermosetting by itself, (b) from 25 to 45% by weight of an ammonium salt, (c) from 10 to 20% by weight of a carbohydrate and/or a polyhydric alcohol, (d) from 15 to 40% of a thermally decomposable organic nitrogen compound, selected from the group consisting of urea, melamine, and dicyandiamide, and (e) from 1 to 10% of a binder from the group consisting of the water-soluble, solvent-soluble and water-dispersible vinyl polymers, the percentages given being based on the solids content of the composition.
Claim 3
Dependent Claim
36 words
The composition of claim 1 wherein water, an organic solvent or a combination thereof is included in an amount such that the constituents (a) to (e) remain substantially solid and form a spreadable or putty-like mass.
Claim 4
Dependent Claim
53 words
A door rabbet having thereon a coating of mechanically stable fireproofing composition as recited in claim 1, which is heat-foamable to at least 10 times its original volume, and which has sufficient mechanical strength to remain whole when the door is slammed, to prevent passage of flames in the event of a fire.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |