US4247435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent fire retardant coating compositions
Assignee: Solutia Inc
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Filing: 1978-10-02
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Granted: 1981-01-27
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Expires: 1998-10-02
Abstract
Abstract Improved aqueous intumescent fire retardant coating compositions comprising: (A) a carbonific; (B) a film-forming binder; and (C) a substantially water-insoluble phosphorus-containing material having at least one P-O-P linkage; wherein (A), (B) and (C) constitute from about 20 to about 90 percent by weight of the total composition, the improvement wherein said composition further comprises a viscosity stabilizing amount of an organic chelating agent, which agent is different from components (A), (B) or (C).
Inventors
- 👤 Nelson H. Kasten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:43
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/18; C09D5/185
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
In an aqueous fire retardant coating composition which comprises: (A) a carbonific; (B) a film-forming binder; and (C) a substantially water-insoluble phosphorus-containing material having at least one P--O--P linkage selected from the group consisting of ammonium polyphosphates, substituted ammonium polyphosphates, amide polyphosphate condensates, melamine pyrophosphates and mixtures thereof; wherein (A), (B) and (C) constitute from about 20 to about 90 percent by weight of the total composition, the improvement wherein said composition is further composed of a chelating agent selected from the group consisting of aminocarboxylic acids, aminophosphonic acids, alkylene and alkylidene diphosphonic acids, α-hydroxy carboxylic acids, ethanolamines and substituted ethanolamines, carboxylic ethers, polymeric polycarboxylic acids and salts of said acids; said chelating agent composing from about 0.1 percent to about 10 percent by weight of the total composition.
Claim 2
Dependent Claim
129 words
In an aqueous fire retardant coating composition which comprises: (A) a carbonific; (B) a film-forming binder; and (C) a substantially water-insoluble phosphorus-containing material having at least one P--O--P linkage selected from the group consisting of ammonium polyphosphates, substituted ammonium polyphosphates, amide polyphosphate condensates, melamine pyrophosphates and mixtures thereof; wherein (A), (B) and (C) constitute from about 20 to about 90 percent by weight of the total composition, the improvement wherein said composition is further composed of a chelating agent selected from the group consisting of aminocarboxylic acids, aminophosphonic acids, alkylene and alkylidene diphosphonic acids, α-hydroxy carboxylic acids, ethanolamines and substituted ethanolamines, carboxylic ethers, polymeric polycarboxylic acids and salts of said acids; said chelating agent composing from about 0.1 percent to about 10 percent by weight of the total composition.
Claim 3
Independent Claim
136 words
A method of stabilizing the viscosity of an aqueous intumescent fire retardant coating composition which contains: (A) a carbonific; (B) a film-forming binder; and (C) a substantially water-insoluble phosphorus-containing material having at least one P--O--P linkage selected from the group consisting of ammonium polyphosphates, substituted ammonium polyphosphates, amide polyphosphate condensates, melamine pyrophosphates and mixtures thereof; wherein (A), (B) and (C) constitute from about 20 to about 90 percent by weight of the total composition, the improvement wherein said composition is further composed of a chelating agent selected from the group consisting of aminocarboxylic acids, aminophosphonic acids, alkylene and alkylidene diphosphonic acids, α-hydroxy carboxylic acids, ethanolamines and substituted ethanolamines, carboxylic ethers, polymeric polycarboxylic acids and salts of said acids; said chelating agent composing from about 0.1 percent to about 10 percent by weight of the total composition.
Claim 4
Independent Claim
136 words
A method of stabilizing the viscosity of an aqueous intumescent fire retardant coating composition which contains: (A) a carbonific; (B) a film-forming binder; and (C) a substantially water-insoluble phosphorus-containing material having at least one P--O--P linkage selected from the group consisting of ammonium polyphosphates, substituted ammonium polyphosphates, amide polyphosphate condensates, melamine pyrophosphates and mixtures thereof; wherein (A), (B) and (C) constitute from about 20 to about 90 percent by weight of the total composition, the improvement wherein said composition is further composed of a chelating agent selected from the group consisting of aminocarboxylic acids, aminophosphonic acids, alkylene and alkylidene diphosphonic acids, α-hydroxy carboxylic acids, ethanolamines and substituted ethanolamines, carboxylic ethers, polymeric polycarboxylic acids and salts of said acids; said chelating agent composing from about 0.1 percent to about 10 percent by weight of the total composition.
Claim 5
Dependent Claim
25 words
A composition in accordance with claim 1 wherein component (C) is selected from the group consisting of ammonium polyphosphates, substituted ammonium polyphosphates and mixtures thereof.
Claim 6
Dependent Claim
14 words
A composition in accordance with claim 3 wherein component (C) is an ammonium polyphosphate.
Claim 7
Dependent Claim
22 words
A composition in accordance with claim 4 wherein the chelating agent is ethylenediaminetetra(methylenephosphonic acid) or an ammonium or alkali metal salt thereof.
Claim 8
Dependent Claim
22 words
A method in accordance with claim 2 wherein the chelating agent is ethylenediaminetetraacetic acid or an ammonium or alkali metal salt thereof.
Claim 9
Dependent Claim
22 words
A method in accordance with claim 2 wherein the chelating agent is ethylenediaminetetra(methylenephosphonic acid) or an ammonium or alkali metal salt thereof.
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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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |