PRODUCTION METHOD FOR POLYSILOXANE, COMPOSITION INCLUDING POLYSILOXANE, AND MOLDED BODY
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United States of America Patent
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Nov 9, 2023
app pub date -
Sep 22, 2021
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Sep 23, 2020
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Abstract
The present invention provides, for example, a method for efficiently producing a polysiloxane having a siloxane constituent unit while making it possible to improve safety and reduce environmental burden. The above-mentioned problem is solved by a method comprising a polymerization step of polymerizing a silane-based compound and a diol compound in the presence of a transesterification catalyst including at least a phosphorus compound, in which the silane-based compound is selected from a specific diaryloxysilane compound, a specific dialkoxysilane compound, and a specific silicon compound, and in the polymerization step, a polysiloxane having a siloxane constituent unit represented by any of formula (1-1) to formula (1-4) is produced. (In the formulas, R1-R10, R30-R33, Z1, Z2, J1, K1, A1, A2, L1, L2, and X are as described in the description of the present application.)
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