Method for preparing a microporous film

Details Method for preparing a microporous film Method for preparing a microporous film

1989-02-27

1992-10-27

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 77, 156246, 264 41, 521 63, 521 64, C08J 900

Patent

active

051586363

ABSTRACT:
A microporous, polymeric film is prepared by dissolving methylene-chloride-soluble, film-forming polymers completely in methylene chloride. Then an aqueous phase is prepared containing non-methylene-chloride-soluble, water-soluble thickeners and, if desired, additives, and brought to a viscosity of about 0.07 to 0.5 Pa s. The aqueous phase is then dispersed in the polymer solution and the resultant paste is spread onto a support material or intermediate support, the methylene chloride is evaporated, the resultant membrane is transferred to the actual support, and finally the water is removed by drying.

REFERENCES:
patent: 4024090 (1977-05-01), von Bonin et al.
patent: 4033912 (1977-07-01), Kleimann et al.
patent: 4137360 (1979-01-01), Reischl
patent: 4466931 (1984-08-01), Tanny
patent: 4499211 (1985-02-01), Walch et al.
Melliand Textilberichte 11 (1986), pp. 824 to 829.

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