Patent US3955987A successfully refreshed from Google Patents.
US3955987A
Expired / Lapsed
US
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Intumescent compositions and substrates coated therewith
Assignee: Monsanto Research Corp
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Filing: 1974-04-19
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Granted: 1976-05-11
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Expires: 1994-04-19
Abstract
Abstract Intumescent compositions are described which when deposited on a substrate protect the substrate against heat and fire damage for an appreciable time, and these compositions are readily removed from the substrate by water washing or water scrubbing both before and after intumescing. Another advantage of these compositions is that they give off very little smoke when exposed to heat and fire. The most effective of these compositions comprise monoammonium phosphate and/or diammonium phosphate as a heat- and fireproofing agent, urea and/or cyanoguanidine (dicyandiamide) as a gas forming or gas generating agent to promote the intumescence, sucrose (sugar) together with the phosphate to promote initial intumescence at low temperature and titanium dioxide as a heat-reflecting agent. Certain possible alternatives to the compounds named above are also named.
Inventors
- 👤 John L. Schaar
- 👤 James A. Ellard
- 👤 John Mann Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:33
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/02; C09K21/04; C09D; C09D5/00; C09D5/18; C09D5/185; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A substrate coated with a water-removable intumescent heat-and-fire-froofing composition comprising monoammonium phosphate, diammonium phosphate or mixtures thereof as the ammonium phosphate in an amount in the range of about 50 to 60 percent by weight, cyanoguanidine, urea or mixtures thereof as the amine compound in an amount in the range of about 18 to 25 percent by weight; sucrose or sucrose + a hexanehexol as the polyhydric compound in an amount in the range of about 10 to 15 percent by weight; and, titanium dioxide as the heat reflecting substance in an amount in the range of about 5 to 20 percent by weight.
Claim 2
Dependent Claim
104 words
A substrate coated with a water-removable intumescent heat-and-fire-froofing composition comprising monoammonium phosphate, diammonium phosphate or mixtures thereof as the ammonium phosphate in an amount in the range of about 50 to 60 percent by weight, cyanoguanidine, urea or mixtures thereof as the amine compound in an amount in the range of about 18 to 25 percent by weight; sucrose or sucrose + a hexanehexol as the polyhydric compound in an amount in the range of about 10 to 15 percent by weight; and, titanium dioxide as the heat reflecting substance in an amount in the range of about 5 to 20 percent by weight.
Claim 3
Dependent Claim
33 words
A coated substrate of claim 1 wherein the coating comprises monoammonium phosphate as ammonium phosphate, cyanoguanidine as the amine compound, sucrose as the polyhydric compound and titanium dioxide as the heat reflecting substance.
Claim 4
Dependent Claim
11 words
A coated substrate of claim 1 wherein mannitol is the hexanehexol.
Claim 5
Dependent Claim
117 words
An intumescent heat- and fireproofing composition consisting essentially of a. monoammonium phosphate, diammonium phosphate, or mixtures thereof as a heat- and fireproofing agent in an amount in the range of about 50 to 60 percent by weight; b. cyanoguanidine, urea or mixtures thereof to promote intumescence in an amount in the range of about 18 to 25 percent by weight; c. sucrose or sucrose + a hexanehexol in sufficient amount together with the phosphate to promote initial intumescence at low temperature in an amount in the range of about 10 to 15 percent by weight, and d. titanium dioxide as a heat-reflecting agent in an amount in the range of about 5 to 20 percent by weight.
Claim 6
Dependent Claim
117 words
An intumescent heat- and fireproofing composition consisting essentially of a. monoammonium phosphate, diammonium phosphate, or mixtures thereof as a heat- and fireproofing agent in an amount in the range of about 50 to 60 percent by weight; b. cyanoguanidine, urea or mixtures thereof to promote intumescence in an amount in the range of about 18 to 25 percent by weight; c. sucrose or sucrose + a hexanehexol in sufficient amount together with the phosphate to promote initial intumescence at low temperature in an amount in the range of about 10 to 15 percent by weight, and d. titanium dioxide as a heat-reflecting agent in an amount in the range of about 5 to 20 percent by weight.
Claim 7
Dependent Claim
15 words
A composition of claim 4 consisting essentially of monoammonium phosphate, cyanoguanidine, sucrose and titanium dioxide.
Claim 8
Dependent Claim
15 words
A composition of claim 4 consisting essentially of monoammonium phosphate, urea, sucrose and titanium dioxide.
Claim 9
Dependent Claim
10 words
A composition of claim 4 wherein said hexanehexol is mannitol.
Claim 10
Dependent Claim
15 words
A composition of claim 4 consisting essentially of diammonium phosphate, cyanoguanidine, sucrose and titanium dioxide.
Claim 11
Dependent Claim
9 words
An aqueous suspension of a composition of claim 5.
Claim 12
Dependent Claim
9 words
An aqueous suspension of a composition of claim 9.
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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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |