Process for forming microporous sheet

Details Process for forming microporous sheet Process for forming microporous sheet

C - Chemistry, Metallurgy

08

J

18/28

C08J 9/28 (2006.01) B29C 44/30 (2006.01) B29C 67/20 (2006.01) D06N 3/14 (2006.01) B29C 53/36 (2006.01)

Patent

CA 1062414

Abstract of the Disclosure Process for forming a microporous polyurethane body in which process a body of an emulsion is prepared of which the discontinuous phase is a non- solvent liquid and the continuous phase is a liquid polymeric material which sets through reaction to solid condition, the liquid emulsion is formed as a layer and reacted under conditions preserving the uniformity of emulsion to form a resilient gel structure and the layer is subjected to physical pressure to express a substantial portion of the non-solvent liquid from the layer leaving a fine microporous structure after release of the pressure. The reaction is continued to advance the state of cure and any remaining non-solvent liquid is removed from the solidified layer.

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