Compositions and methods for the protection of substrates from heat flux and fire
AssigneeRutgers, The State University of New Jersey
InventorsThomas Nosker, Jennifer Lynch, Mark Mazar, Patrick Nosker
Life of this patent
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Abstract
A flame or heat flux protective coating composition, which includes a dispersion of fiberglass, hollow glass spheres, or a combination of both in silicone. A flame or heat flux protective sheet, which includes hollow glass spheres dispersed in silicone in a sheet form or fiberglass and silicone in a sheet form, wherein the fiberglass is dispersed in the silicone or the fiberglass is a woven cloth coated with the silicone is also presented. Articles incorporating the flame or heat flux protective coating or sheet form and methods for coating an article with the flame or heat flux protective coating composition are also presented.
Claims17
A flame or heat flux protective sheet consisting of hollow glass spheres dispersed in silicone in a sheet form wherein the glass spheres are present in an amount from 0.1% to 10% by weight, wherein the silicone comprises a polymer comprising dimethylsiloxane, further wherein the silicone starts to decompose at a temperature of about 400° F., and the size and concentration of the hollow glass spheres are selected to provide a protective sheet form which promotes effective radiation cooling (emissivity) when exposed to heat, as defined by passing a flame test comprising the steps of:
- a) providing a specimen consisting of a vertical steel coupon coated with the above protective sheet;
- b) providing an IR sensor mounted to the back side of said specimen 2.54 cm above the bottom edge and at the center across the specimen width;
- c) providing a propane torch flame wherein the inner cone length of the flame is adjusted to 3.175 cm;
- d) applying for 10 minutes the tip of said inner cone of said flame directly and normal to said specimen's coated surface, 2.54 cm above the bottom edge and at the center across the specimen width;
- and
- e) recording the temperature as a function of time detected by said IR sensor to provide a maximum temperature;
- wherein a coating is considered to fail said flame test when the maximum temperature exceeds 316° C.
A flame or heat flux protective coating composition consisting of hollow glass spheres dispersed in silicone wherein the glass spheres are present in an amount from 0.1% to 10% by weight, wherein the silicone comprises a polymer comprising dimethylsiloxane, wherein the silicone starts to decompose at a temperature of about 400° F., and the size and concentration of the hollow glass spheres are selected to provide a coating composition which promotes effective radiation cooling (emissivity) when exposed to heat, as defined by passing a flame test comprising the steps of:
- a) providing a specimen consisting of a vertical steel coupon coated with the above composition;
- b) providing an IR sensor mounted to the back side of said specimen 2.54 cm above the bottom edge and at the center across the specimen width;
- c) providing a propane torch flame wherein the inner cone length of the flame is adjusted to 3.175 cm;
- d) applying for 10 minutes the tip of said inner cone of said flame directly and normal to said specimen's coated surface, 2.54 cm above the bottom edge and at the center across the specimen width;
- and
- e) recording the temperature as a function of time detected by said IR sensor to provide a maximum temperature;
- wherein a coating is considered to fail said flame test when the maximum temperature exceeds 316° C.
A flame or heat flux protective sheet consisting of hollow glass spheres, fiberglass and silicone in a sheet form, wherein the silicone comprises a polymer comprising dimethylsiloxane, wherein the silicone starts to decompose at a temperature of about 400° F., the fiberglass is dispersed in the silicone or the fiberglass is a woven cloth coated with the silicone, and the fiberglass is present in an amount from about 4% to about 14% by weight, wherein at least a portion of sizing material has been removed from said fiberglass, further wherein the hollow glass spheres are dispersed in the silicone and are present in an amount of up to about 10% by weight.
A flame or heat flux protective sheet consisting of hollow glass spheres dispersed in silicone in a sheet form, wherein the silicone comprises a polymer comprising dimethylsiloxane, wherein the silicone starts to decompose at a temperature of about 400° F. and the hollow glass spheres are present in an amount from about 0.1% to about 10% by weight.
Dependencies are inferred from the claim text.