Alkyl phosphonate ester-modified organopolysiloxane latex and a method for the preparation thereof

摘要

The organopolysiloxane in the inventive latex is modified with phosphonate ester-containing groups such as those expressed by the formula -Si-CH2CH2-PO(OEt)2 (Et: ethyl group) and -Si-CH2CH2CH2-PO(ODd)2 (Dd: dodecyl group) and exhibits excellent performance in the applications as a fabric treatment agent and the like. The inventive organopolysiloxane latex can be prepared by the polymerizing reaction of an organosilicon compound or, preferably, an organopolysiloxane and a phosphonate ester-modified alkoxysilane emulsified together in an aqueous medium containing a surface active agent of the class of the organic sulfonic acid type or a sulfate ester type ones which serves both as an emulsifier and as an acid catalyst.