摘要 |
Disclosed herein are silicone resins comprising structural units of the formulae: and at least one structural unit selected from the group consisting of: where "A" is a spacer group comprising C<SUB>2 </SUB>to C<SUB>50 </SUB>alkyl groups; "B" and "C" are spacer groups comprising C<SUB>2 </SUB>to C<SUB>20 </SUB>alkyl groups; "M<SUP>1</SUP>" comprises a Group III element,; R<SUP>1</SUP>, R<SUP>3</SUP>, R<SUP>6</SUP>, and R<SUP>7 </SUP>independently comprise OH, alkyl groups, or alkoxy groups; R<SUP>2 </SUP>and R<SUP>4 </SUP>independently comprise hydrogen, alkali metal, or alkyl groups; and R<SUP>5 </SUP>comprises a alkyl group. Methods for preparing these silicone resins are also disclosed. The silicone resins are useful as catalysts for producing bisphenols.
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