Microporous sheets and a process for making them

Details Microporous sheets and a process for making them Microporous sheets and a process for making them

1974-08-28

1979-01-30

Esposito, Michael F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264 41, 427246, 428320, 428425, 428447, 521 62, 521 86, 521137, B32B 2740

Patent

active

041373600

ABSTRACT:
A method is provided for making microporous, vapor-permeable polyurethane sheets by coagulating a polyurethane in a polar solvent with a non-solvent for the polyurethane, wherein a polyurethane polysiloxane is added to the solution of the polyurethane in the polar solvent.

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patent: 3619250 (1971-11-01), Nishijima
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patent: 3639145 (1972-02-01), Fujita et al.
patent: 3645775 (1972-02-01), Schulze et al.
patent: 3729536 (1973-04-01), Warwicker
patent: 3763054 (1973-10-01), Reischl et al.

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