Block hydrogen-modified silicone and process for producing the same

摘要

A block hydrogen-modified silicone capable of fully exhibiting the characteristics of both of silicone and its modifying group and a process for producing the same. A block hydrogen-modified silicone which is a copolymer having a main chain consisting exclusively of a siloxane chain containing a dialkylsiloxane chain (I) and an alkylhydrogensiloxane chain (II), wherein the number-average chain length (ma) of the dialkylsiloxane unit and the number-average chain length (na) of the alkylhydrogensiloxane unit are each from 5 to 3,000. <CHEM> wherein R<1>, R<2> and R<3> represent each an alkyl group having 1 to 6 carbon atoms or a phenyl group; and m and n represent each an integer of 1 or more.