摘要:
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):CH.sub.3 O(CH.sub.2 CH.sub.2 O).sub.m CH.sub.3 (2)where m is an integer of 2 to 6. This process makes it possible to improve production yield of hexafluoropropylene oxide oligomers remarkably, and to raise a reaction temperature for the oligomerization, as compared with conventional methods, thereby shortening reaction time therefor.
摘要:
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.