Shin-Etsu Chemical Co., Ltd.

Kazutoshi Munezawa

Kenichi Fukuda

Hiroshi Inomata

Yasuo Tarumi

Hiromasa Yamaguchi

Hitoshi Kinami

Masayuki Oyama

A process of producing a perfluorocarboxylic acid fluoride having the formula (1): ##STR1## wherein n is an integer of at least 2, comprising effecting oligomerization of hexafluoropropylene oxide in the presence of an alkali metal fluoride a sulfone or a mixture of a sulfone with an ether having the formula (2):

Process for producing perfluorocarboxylic acid fluoride

A fluorine-containing organosilicon compound having the formula (1): ##STR1## wherein X is a hydrolizable group, R.sup.1 is a monovalent organic group, R.sup.2 is a methyl group or a hydrogen atom, n is an integer of 1, 2 or 3, and m is an integer of 0 or 1, and a process of producing said compound. The compound may be used as a silane coupling agent capable of improving not only the strength of laminated sheets of polyester resin and glass and polyester resin concrete but also water and heat resistances.

Fluorine-containing organosilicon compound and process of producing the

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Annaka, Japan

Kazutoshi Munezawa