Intumescent substrate coating

Details Intumescent substrate coating Intumescent substrate coating

2006-01-31

2009-10-13

Feely, Michael J (Department: 1796)

Stock material or miscellaneous articles

Composite

Of epoxy ether

C428S332000, C428S413000, C523S179000, C523S466000, C523S468000, C252S606000

Reexamination Certificate

active

07601426

ABSTRACT:
An intumescent coating in the form of an initially liquid coating which cures to a solid and adheres to a substrate. The coating includes a flexible thermosetting epoxy, such as diglycidyl ether of bisphenol-A (DGEBA), with an aliphatic amine curing agent, expandable graphite flakes with reagent chemicals that react upon heating and decompose into gaseous products, and fumed silica. In the presence of heat or flame, an intumescent layer develops at the coating surface, insulating the substrate. The coating is found to add intumescent characteristics which provide heat resistant and fire retardant qualities.

REFERENCES:
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patent: 3992358 (1976-11-01), Schinabeck
patent: 4529467 (1985-07-01), Ward et al.
patent: 5389435 (1995-02-01), Yap
patent: 6084008 (2000-07-01), Liu
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patent: 6528559 (2003-03-01), Nakacho et al.
patent: 6771502 (2004-08-01), Getz, Jr. et al.
patent: 6884745 (2005-04-01), Yazici et al.
Aerosil Fumed Silica: Product information for Aerosil 200, provided by Evonik Degussa web site (no date).

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