Patent No. U.S. 7,217,753 B2
Rohm and Haas Company has obtained a patent for a fire retardant intumescent coating composition selected from the group consisting of powder coating compositions and aqueous coating compositions. The composition is comprised of 30-60% by weight of a phosphorous containing material which decomposes to produce phosphoric acid when the coating is exposed to fire; 10-30% by weight of a thermosetting binder; 2.5-10% by weight of a curing agent for the thermosetting binder; and
5-40% by weight of a thermoplastic binder, wherein each of the thermosetting and thermoplastic binders comprise groups that react with the phosphoric acid, thereby imparting charring and blowing functions to the intumescent coating composition.
Rohm and Haas patents intumescent
Published December 20, 2007
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