| 摘要 |
It is to provide the use conditions of hydrogen chloride in which no molecular weight change, coloration, or the like is caused by degradation or condensation, in a process for the production of a phenol structure-introduced, modified polysiloxane compound obtained by block-copolymerizing a p-alkenylphenol unit and an organosiloxane unit as essential constituent units. In the present invention, a modified polysiloxane compound represented by formula (I): X(Y)n (I), [wherein X represents a polymer block having a repeating unit represented by formula (II), Y represents a polymer block having a repeating unit represented by formula (III), and n represents 1 or 2], and having an X to Y weight ratio of 1/99 ‰¤ X/Y ‰¤ 90/10 and a number-average molecular weight of 1,000 to 100,000 is subjected to treat for elimination of a protecting group for a hydroxyl group by adding a non-aqueous solution containing hydrogen chloride in the presence of a non-aqueous solvent so that hydrogen chloride is 0.9 to 1.3 equivalents with respect to 1 equivalent of the repeating unit represented by formula (II).
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