US5225464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent coating and method of manufacture
Assignee: Material Technologies and Sciences Inc
•
Filing: 1992-04-02
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Granted: 1993-07-06
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Expires: 2012-04-02
Abstract
Abstract Compositions useful in forming intumescent coatings are provided. These compositions are based on a reaction between phosphoric acid, melamine and monoammonium phosphate, which renders the monoammonium phosphate substantially less soluble while retaining its low dissolution temperature. Intumescent coatings utilizing the above-technology are disclosed as is a method of manufacturing these coatings.
Inventors
- 👤 John E. Hill, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:54
CPC Classifications
C; C09; C09K; C09K21/00; C09K21/06; C09K21/12; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/5205; C09D; C09D5/00; C09D5/18; C09D5/185
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
72 words
A composition useful in producing a fire retardant substance which comprises the reaction product of from about 0.1% to about 5.0% by weight of reactants phosphoric acid, from about 4.0% to about 40.0% by weight of reactants melamine and from about 15% to about 95% by weight of the reactants monoammonium phosphate containing from about 10-60% ammonia-free phosphate in solution, the reaction occurring in a solvent at a temperature below 155° C.
Claim 2
Dependent Claim
72 words
A composition useful in producing a fire retardant substance which comprises the reaction product of from about 0.1% to about 5.0% by weight of reactants phosphoric acid, from about 4.0% to about 40.0% by weight of reactants melamine and from about 15% to about 95% by weight of the reactants monoammonium phosphate containing from about 10-60% ammonia-free phosphate in solution, the reaction occurring in a solvent at a temperature below 155° C.
Claim 3
Dependent Claim
21 words
A method of manufacturing a composition of claim 1 which comprises contacting phosphoric acid with melamine and then adding monoammonium phosphate.
Claim 4
Dependent Claim
17 words
A method of claim 2 further comprising the addition of chlorinated paraffin, pentaerythritol and a polymeric adhesive.
Claim 5
Dependent Claim
96 words
An intumescent composition which comprises the reaction product of from about 0.2% to about 2.5% by weight of reactants phosphoric acid, from about 2.5% to about 18.0% by weight of reactants melamine and from about 9% to about 60% by weight of reactants monoammonium phosphate containing about 10-60% ammonia-free phosphate in solution, the reaction occurring in a solvent at a temperature below 155° C. with from about 1.4% to about 9.0% by weight of reactants chlorinated paraffin containing about 70% chlorine, from about 3.0% to about 12.0% by weight of reactants pentaerythritol and a polymeric adhesive.
Claim 6
Dependent Claim
96 words
An intumescent composition which comprises the reaction product of from about 0.2% to about 2.5% by weight of reactants phosphoric acid, from about 2.5% to about 18.0% by weight of reactants melamine and from about 9% to about 60% by weight of reactants monoammonium phosphate containing about 10-60% ammonia-free phosphate in solution, the reaction occurring in a solvent at a temperature below 155° C. with from about 1.4% to about 9.0% by weight of reactants chlorinated paraffin containing about 70% chlorine, from about 3.0% to about 12.0% by weight of reactants pentaerythritol and a polymeric adhesive.
Claim 7
Dependent Claim
25 words
A composition of claim 4, wherein the prereacted polymeric adhesive is selected from the group consisting of poly(vinyl acetate), poly(vinyl ester), polyester and epoxy resin.
Claim 8
Dependent Claim
9 words
A composition of claim 4, further comprising a surfactant.
Claim 9
Dependent Claim
9 words
A composition of claim 4 further comprising a defoamer.
Claim 10
Dependent Claim
12 words
A composition of claim 4 further comprising a high melt temperature fiber.
Claim 11
Dependent Claim
20 words
A composition of claim 8, wherein the high melt temperature fiber comprises calcium silicate, calcium aluminosilicate, glass, carbon or polyaramide.
References Cited (Backward Citations)
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US3635970A
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US4080501A
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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) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |