Tosoh Corporation

Shinya Imatomi

Hiroyuki Ito

Satoru Yamada

Yoshihiko Mori

Motohiro Oguri

Tetsuo Asakawa

Sae Someya

Tomokazu Ohashi

Hideyuki Hamaji

Satoru Kondou

Yukie Maejima

The present invention addresses the problem of providing a block copolymer which is useful as a surface treatment agent for cell culture substrates, said surface treatment agent enabling cell separation in a short period of time. The above-mentioned problem is solved by a block copolymer that includes the following blocks (A), (B) and (C): (A) a temperature-responsive polymer block that has a lower critical solution temperature (LCST) within the range of from 0&#xb0; C. to 50&#xb0; C. with respect to water (B) a hydrophilic polymer block that does not have an LCST within the range of from 0&#xb0; C. to 50&#xb0; C., while having an HLB value within the range of from 9 (inclusive) to 20 (exclusive) (C) a hydrophobic polymer block that does not have an LCST within the range of from 0&#xb0; C. to 50&#xb0; C., while having an HLB value within the range of from 0 (inclusive) to 9 (exclusive).

Block copolymer and surface treatment agent using same

To provide a heterogeneous catalyst that exhibits high activity and high selectivity, specifically a catalyst suitable for oxychlorination to produce 1,2-dichloroethane from ethylene, and a catalyst system. Provided are: a heterogeneous catalyst supported on a porous carrier, characterized in that the integral value of the hysteresis occurring between an adsorption isotherm and a desorption isotherm by a gas adsorption method, is at most 19% to the total integral value of the adsorption isotherm; and a catalyst system for producing 1,2-dichloroethane, which comprises this catalyst and a diluent having a spherical shape, circular cylindrical shape or hollow cylindrical shape.

Heterogeneous catalyst and catalyst system for producing 1,2-dichloroethane

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Kanagawa, Japan

Shinya Imatomi