Functionalized silicone resins, methods for their preparation, and use as catalysts
View Patent ↗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 2 to C 50 alkyl groups; “B” and “C” are spacer groups comprising C 2 to C 20 alkyl groups; “M 1 ” comprises a Group III element; R 1 , R 3 , R 6 , and R 7 independently comprise OH, alkyl groups, or alkoxy groups; R 2 and R 4 independently comprise hydrogen, alkali metal, or alkyl groups; and R 5 comprises a alkyl group. Methods for preparing these silicone resins are also disclosed. The silicone resins are useful as catalysts for producing bisphenols.
1. A silicone resin comprising structural-units of the formulae:
and
at least one structural unit selected from the group consisting of:
wherein the structural unit of formula:
is derived from a polydialkoxysiloxane, and is present in an amount from 36.3 to 38.7 weight percent of an overall weight of die silicone resin; and wherein “A” is a spacer group comprising C 2 to C 50 alkylene groups; “B” and “C” are spacer groups comprising C 2 to C 20 alkylene groups, R 1 , R 3 , and R 6 independently comprise OH, alkyl groups, or alkoxy groups; R 7 comprises methoxy groups or ethoxy groups; and R 2 and R 4 independently comprise hydrogen, alkali metal, or alkyl groups.
2. The silicone resin of claim 1 , wherein “A” is an alkylene group selected from the group consisting of —(CH 2 ) 2 , —(CH 2 ) 8 —, and —CH 2 CH 2 —(C 6 H 4 )—CH 2 CH 2 —.
3. The silicone resin of claim 1 , further comprising a structural unit having a formula:
wherein M 2 comprises a Group IV element selected from the group consisting of titanium, silicon and zirconium.
4. The silicone resin of claim 1 , wherein “B” and “C” are each independently an alkylene group selected from the group consisting of —(CH 2 ) 2 —, —(CH 2 ) 3 —, (C 6 H 4 )CH 2 —, and —C 6 H 4 —.