Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Patent
1983-08-17
1984-08-14
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
556453, 556455, 556456, 528 12, 528 20, 528 21, C07F 708
Patent
active
044658494
ABSTRACT:
A very simple and versatile method is proposed for the preparation of an aqueous emulsion of silicone in which an organochlorosilane or a mixture of organochlorosilanes is added dropwise into an aqueous medium in the presence of a surface active agent or, preferably, into an aqueous medium containing a surface active agent in advance followed by or with concurrent removal of the hydrogen chloride from the mixture by adding an alkaline neutralizing agent or by use of the techniques of ion exchange so that a stable aqueous emulsion can be produced in the aqueous medium at the same time as the organochlorosilane or silanes are hydrolyzed followed by the dehydration condensation of the resultant silanol compounds to form an organopolysiloxane in situ by the catalytic activity of the hydrogen chloride formed by the hydrolysis.
REFERENCES:
patent: 2901460 (1959-08-01), Boldebuck
patent: 3231496 (1966-01-01), Pater
patent: 3364246 (1968-01-01), Rossmy
patent: 3373138 (1968-03-01), Brown
patent: 3489782 (1970-01-01), Pruvost et al.
patent: 4066594 (1978-01-01), Moeller
Abe Akira
Terae Nobuyuki
Shaver Paul F.
Shin-Etsu Chemical Co. , Ltd.
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