Asahi Kasei Kogyo Kabushiki Kaisha

Yoshimi Kakutani

Hidekazu Ishimura

Naohisa Aoyagi

Tatuo Nejigaki

A process for sterilizing a filtration device which comprises employing therein a hollow fiber type module having hollow fibers of heat resistant polymer with a heat distortion temperature of 70.degree. C. or higher under a load of 18.6 kg/cm.sup.2 and with a pore diameter of less than 0.45 .mu.m and having a difference in average linear expansion coefficient between the sealing material for fixing the end portions of the hollow fibers in the module case, at a temperature of 20.degree.-121.degree. C. of 7.times.10.sup.-5 /.degree. C. or lower, and passing steam from the raw water side of the module to the filtrate side thereof, while withdrawing all or a part of the raw water and filtrate which partially fill the module or alternatively after withdrawal of raw water and filtrate.

Process for sterilizing a filtration device

An aqueous dispersion composition is described, which is prepared by uniformly mixing (A) a mixture of aromatic compounds having an average of at least 0.5 epoxy groups and from 0.1 to 1.5 acryloyl or methacryloyl groups in the molecule, and (B) at least one ethylenic monomer, and then polymerizing the mixture. In other embodiments, the composition can contain a polyamine-based hardener, and additionally, a resin, e.g., a phenol resin and a terpene resin. This composition has excellent storage stability and can provide a coating film having excellent water resistance, heat resistance, and adhesiveness.

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Shizuoka, Japan

Yoshimi Kakutani