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US5130184A Expired / Lapsed US ⏱️ 0.0 years remaining

Fire barrier coating and fire barrier plywood

Assignee: INTERNATIONAL BARRIER TECHNOLOGY Inc
•
Filing: 1990-09-10
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Granted: 1992-07-14
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Expires: 2010-09-10
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Abstract

Abstract A novel, non-combustible thin coating, applied as an air-setting paint, is used to form a coherent fire-barrier on or between susceptible wood or plastic substrates, or other substances. Consisting of a paint-like slurry of three separate but compatible and mutually synergistic co-bonding systems, viz. magnesium "oxychloride" cement, plus high alumina mono-calcium aluminate cement, plus colloidal silica dispersed in dimethyl formamide (DMF), and utilizing an aqueous solution of magnesium chloride as the common hydrating fluid for the two cements, the coating retains its structural integrity through prolonged exposure to flame temperatures of 2000° F. The coating takes advantage of its brilliant whiteness to act as a thermal radiation reflector for the high radiation component of most flames. Used alone, or in combination with structural reinforcing geotextiles, such as non-woven spunbonded polyester fabric, or woven and non-woven fiberglass or other natural or synthetic fabrics to form a laminate, the coating, while serving only transitorily as a heat barrier, effectively prevents the ignition of and flame spread of fire on the coated substrate. When placed between substrates at the partial sacrifice of the surface directly exposed to flame, it protects the back-substrate, and thus maintains structural integrity, as well as preventing the spread of flame to adjacent areas. The coating thus acts as a "fire-barrier" for which there are numerous applications.

Inventors

  • 👤 Harold Ellis

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 22:07
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B28/30; C04B28/32; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5076; C04B41/509; C09; C09D; C09D5/00; C09D5/18; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/20; C04B2111/28; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/26; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T442/00; Y10T442/30; Y10T442/3927; Y10T442/60; Y10T442/695

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 172 words
A fire resistant laminate for retarding flame spread and flame penetration therethrough, said laminate comprising: (I) a solid, combustible lamina; and (II) bonded to said lamina (A), a thin continuous layer derived from a composition consisting essentially of a flowable, substantially uniform dispersion of: (A) a binder component comprising a powdered, substantially uniform mixture of (1) heat activated MgO, and (2) high-alumina calcium aluminate cement; in (B) a gauging component in about a stoichiometric amount sufficient to react with said binder component, wherein the gauging component comprises an aqueous solution of MgCl 2 or MgSO 4 , and wherein the aqueous solution has a specific gravity of about 26° to about 32° Baume; and (C) colloidal silica or a silica sol in an amount sufficient for said inorganic cementitious composition in a fluid state to adhesively bond to said lamina (A) and to maintain an adhesive bond to said lamina after drying to form said thin layer; and wherein said fire resistant laminate has a Class I (or A) fire retardancy classification.
Claim 2
Dependent Claim 172 words
A fire resistant laminate for retarding flame spread and flame penetration therethrough, said laminate comprising: (I) a solid, combustible lamina; and (II) bonded to said lamina (A), a thin continuous layer derived from a composition consisting essentially of a flowable, substantially uniform dispersion of: (A) a binder component comprising a powdered, substantially uniform mixture of (1) heat activated MgO, and (2) high-alumina calcium aluminate cement; in (B) a gauging component in about a stoichiometric amount sufficient to react with said binder component, wherein the gauging component comprises an aqueous solution of MgCl 2 or MgSO 4 , and wherein the aqueous solution has a specific gravity of about 26° to about 32° Baume; and (C) colloidal silica or a silica sol in an amount sufficient for said inorganic cementitious composition in a fluid state to adhesively bond to said lamina (A) and to maintain an adhesive bond to said lamina after drying to form said thin layer; and wherein said fire resistant laminate has a Class I (or A) fire retardancy classification.
Claim 3
Dependent Claim 31 words
Fire resistant laminate according to claim 1 in which said inorganic cements are selected from the group consisting of high alumina clacium aluminate cement, magnesium oxychloride cement and magnesium oxysulphate cement.
Claim 4
Dependent Claim 16 words
Fire resistant laminate according to claim 2 in which said inorganic cementitious composition contains colloidal silica.
Claim 5
Dependent Claim 18 words
Fire resistant laminate according to claim 3 in which layer (B) is up to about 1/16 inch thick.
Claim 6
Dependent Claim 26 words
Fire resistant laminate according to claim 3 in which said cementitious composition is coated on a natural or synthetic fibrous sheet of woven or non-woven fabric.
Claim 7
Dependent Claim 29 words
Fire resistant laminate according to claim 5 in which said fabric is comprised of fibers selected from the group consisting of fiberglass, aramid, polyester, nylon, carbon, and quartz fibers.
Claim 8
Dependent Claim 17 words
Fire resistant laminate according to claim 3 in which said combustible lamina (A) is comprised of wood.
Claim 9
Dependent Claim 35 words
Fire resistant laminate according to claim 7 in which said layer (B) has two opposing lateral faces, and solid, combustible, wood lamina (A) are bonded to each of said faces to form a plywood laminate.
Claim 10
Dependent Claim 19 words
Fire resistant laminate according to claim 8 in which said wood lamina are adhesively bonded to said layer (B).
Claim 11
Dependent Claim 36 words
Fire resistant laminate according to claim 9 wherein said wood lamina are adhesively bonded to said layer (B) with a wood-bonding adhesive selected from the group consisting of phenol-formaldehyde, urea-formaldehyde, resorcinol, melamine, melamine-urea, and urea resins.
Claim 12
Dependent Claim 21 words
Fire resistant laminate according to claim 8 in which said layer (B) has a MOHS hardness of at least about 3.0.
Claim 13
Dependent Claim 17 words
Fire resistant laminate according to claim 1 in which said combustible lamina (A) is comprised of wood.

References Cited (Backward Citations)

US4680907A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-07-14 1996-01-13 1996-07-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-07-14 2000-01-13 2000-07-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-07-14 2004-01-13 2004-07-14 $7700.00 Window Closed / Lapsed

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