Mitsubishi Chemical Industries Limited

Nihon Nohyaku Co., Ltd.

Harutaka Kimura

Seiichi Nozawa

Matazaemon Uchida

Seiichi Mukai

Masakazu Shibayama

Masaharu Shikama

Isao Nishino

A curing agent for fat necrosis which contains a dithia derivative represented by the general formula ##STR1## wherein R and R.sup.1 may be either the same or different and denote a lower alkyl group; n denotes an integer of 0, 1 or 2; and A denotes --CH.sub.2 --, ##STR2## M being H or a salt-forming rest, --CH.dbd.CH--, --CH.sub.2 CH.sub.2 --, or ##STR3## and a method for curing said disease using the said curing agent.

Curing agent for fat necrosis and method for curing said disease

Polyoxymethylene is produced by polymerizing formaldehyde in the presence of a catalyst comprising a catalytic component of an organoaluminum compound or a complex thereof supported on a modifier of a higher carboxylic acid amide compound. The organoaluminum compound can be in a form of a complex of the organoaluminum compound and a phosphorus compound or an amine.

Process for producing polyoxymethylene

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Tokyo, Japan

Harutaka Kimura