Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1989-03-31
1990-10-23
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 61, 264 41, C08J 928
Patent
active
049652915
ABSTRACT:
A method of manufacturing a porous membrane by dissolving vinylidene fluoride polymer in a good solvent such as acetone and then causing solidification of the resultant solution in a non-solvent. The dissolution of the vinylidene fluoride polymer in the solvent is done in a predetermined pressure condition, namely 0.1 kg/cm.sup.2, preferably in a range of 0.5 to 5.0 kg/cm.sup.2.
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CRC Handbook of Chemistry and Physics, 62nd Edition, 1981-1982, p. F-304.
Kitoh Hideaki
Koyama Noriyuki
Seita Yukio
Yokomachi Shinsuke
Foelak Morton
Terumo Kabushiki Kaisha
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