Chemical resistant coatings
AssigneeMcDonnell Douglas Corporation
InventorNorman R. Byrd
Life of this patent
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Abstract
A coating having resistance to chemical warfare agents, comprising a cured mixture of (a) a polysiloxane having unsaturated groups available for cross-linking and (b) a polysiloxane containing reactive Si--H groups. A platinum siloxane catalyst is also employed in the mixture. A representative coating composition is a mixture of vinyldimethly terminated polydimethylsiloxane polymethylhydrosiloxane; and platinum-divinyl-tetramethyldisiloxane complex catalyst. The coating composition cures at room temperature and in a relatively short period of time.
Claims15
A coating on a substrate, said coating having resistance to chemical warfare agents, said coating comprising a cured mixture of compounds (a) a combination of dimethylsiloxane-vinylmethylsiloxane copolymer and methyl 3,3,3-trifluoropropyl-vinylmethylsiloxane copolymer, and (b) a polysiloxane containing reactive Si--H groups.
A composition consisting essentially of a mixture of (a) a combination of dimethylsiloxane-vinylmethylsiloxane copolymer and methyl 3,3,3-trifluoropropyl-vinylmethylsiloxane copolymer, and (b) a polysiloxane containing reactive Si--H groups, and (c) a suitable platinum catalyst, and which composition is capable of being cured at room temperature and permanently bonded to a structural substrate to provide a coating having resistance to chemical warfare agents and simulants thereof.
A method of rendering a substrate resistant to chemical warfare agents, which comprises applying to said substrate a mixture of (a) a polysiloxane having unsaturated groups available for cross-linking, (b) a polysiloxane containing reactive Si--H groups, and (c) a platinum siloxane catalyst, and curing said mixture to form a coating resistant to chemical warfare agents and to which coating said agents have decreased adherence, and contacting said coating with a chemical warfare agent.
Dependencies are inferred from the claim text.