Microporous discs of elastic segmented polyurethane

Details Microporous discs of elastic segmented polyurethane Microporous discs of elastic segmented polyurethane

1991-09-23

1992-06-30

Foelak, Morton

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

264 41, 264DIG14, 4283188, 521 51, B32B 302, C08J 928

Patent

active

051261812

ABSTRACT:
Solutions of segmented polyurethanes are coagulated to form flat circular microporous structures having a substantially continuous pore-free surface and a substantially open pore surface.

REFERENCES:
patent: 4296174 (1981-10-01), Hanzel et al.
patent: 4859711 (1989-08-01), Jain et al.
patent: 4898913 (1990-02-01), Ziemelis et al.
patent: 4921842 (1990-05-01), Henning et al.

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