Fire-resistant essentially halogen-free epoxy composition
First Claim
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1. A fire-resistant, low smoke-emitting, and low toxic gases-emitting essentially halogen-free one-part epoxy composition comprising:
- (a) 100 parts by weight of an organic epoxide compound having an epoxide functionality of at least 1;
(b) about 2 to 180 parts by weight of an epoxide hardener;
(c) about 0.5 to 40 parts by weight of a film-forming material;
(d) about 0.5 to 30 parts by weight of a foaming agent; and
(e) about 60 to 230 parts by weight of an essentially halogen-free fire-resistant system that includes a mixture of;
(1) a smoke suppressant selected from the group consisting of alkaline earth metal hydroxides, aluminium group hydroxides and mixtures thereof, and(2) a phosphorus-containing material;
wherein the hardened composition when tested according to ATS 1000, exhibits;
(i) a burn rate of less than 150 mm;
(ii) a flame time of less than 15 seconds;
(iii) a drip flame time of less than 3 seconds when the hardened composition is held in a vertical position and ignited for 60 seconds;
(iv) a non-flaming smoke density and a flaming smoke density which are both less than 150 after 240 seconds; and
(v) a toxic gas emission profile as follows;
HF;
less than 50 ppm after 1.5 minutes and 4 minutes;
HCl;
less than 50 ppm after 1.5 minutes and less than 500 ppm after 4 minutes;
HCN;
less than 100 ppm after 1.5 minutes and less than 150 ppm after 4 minutes;
SO2 ;
less than 50 ppm after 1.5 minutes and less than 100 ppm after 4 minutes;
CO;
less than 3000 ppm after 1.5 minutes and less than 3500 ppm after 4 minutes; and
NO+NO2 ;
less than 50 ppm after 1.5 minutes and less than 100 ppm after 4 minutes.
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Abstract
This invention is directed to a fire-resistant, essentially halogen-free epoxy composition that emits low amounts of smoke and toxic gas while burning. The one-part composition is particularly useful in aerospace applications for bonding, sealing and/or insulating metal, plastic and composite parts.
44 Citations
20 Claims
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1. A fire-resistant, low smoke-emitting, and low toxic gases-emitting essentially halogen-free one-part epoxy composition comprising:
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(a) 100 parts by weight of an organic epoxide compound having an epoxide functionality of at least 1; (b) about 2 to 180 parts by weight of an epoxide hardener; (c) about 0.5 to 40 parts by weight of a film-forming material; (d) about 0.5 to 30 parts by weight of a foaming agent; and (e) about 60 to 230 parts by weight of an essentially halogen-free fire-resistant system that includes a mixture of; (1) a smoke suppressant selected from the group consisting of alkaline earth metal hydroxides, aluminium group hydroxides and mixtures thereof, and (2) a phosphorus-containing material;
wherein the hardened composition when tested according to ATS 1000, exhibits;(i) a burn rate of less than 150 mm; (ii) a flame time of less than 15 seconds; (iii) a drip flame time of less than 3 seconds when the hardened composition is held in a vertical position and ignited for 60 seconds; (iv) a non-flaming smoke density and a flaming smoke density which are both less than 150 after 240 seconds; and (v) a toxic gas emission profile as follows; HF;
less than 50 ppm after 1.5 minutes and 4 minutes;HCl;
less than 50 ppm after 1.5 minutes and less than 500 ppm after 4 minutes;HCN;
less than 100 ppm after 1.5 minutes and less than 150 ppm after 4 minutes;SO2 ;
less than 50 ppm after 1.5 minutes and less than 100 ppm after 4 minutes;CO;
less than 3000 ppm after 1.5 minutes and less than 3500 ppm after 4 minutes; andNO+NO2 ;
less than 50 ppm after 1.5 minutes and less than 100 ppm after 4 minutes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification