| 摘要 |
This invention relates to a process for preparing a sulfophenylalkylsiloxane or a sulfonaphthylalkylsiloxane having either of the following formulae: <IMAGE> (I) <IMAGE> (II) (a) adding an essentially equimolar ratio of chlorosulfonic acid to a phenylalkyltrichlorosilane or a naphthylalkyltrichlorosilane having either of the following formulae: <IMAGE> (III) <IMAGE> (IV) wherein R of formulae I, II, III, and IV is individually hydrogen, halogen, or an alkyl radical having 1 to 4 carbon atoms; R1 is an alkylene radical having 2 to 5 carbon atoms; R2 is R or <IMAGE> with the proviso that at least one R2 be <IMAGE> R3 is -H or <IMAGE> with the proviso that at least one R3 be <IMAGE> R4 is R or -R1SiCl3 with the proviso that at least one R4 be -R1SiCl3 and n is at least 1, m is 1 or 2, in the presence of thionyl chloride at a temperature of from about 0 DEG to about 100 DEG C.; (b) reacting the reaction mixture at said temperature until the evolution of hydrogen chloride is substantially complete; (c) removing the volatiles to form a liquid intermediate; and (d) hydrolyzing said intermediate with water. The new process avoids solid formation of an intermediate product.
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