Asymmetrical siloxane
AssigneeMomentive Performance Materials Inc.
InventorsDavid D Farris, Chauncey J Rinard, Mark D Leatherman
Life of this patent
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Abstract
An asymmetric siloxane is made by reacting a silicone having the formula MHDxM′H where MH is R1R2HSiO1/2. M′H is R4R5HSiO1/2 and x is an integer 0≦x≦10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.
Claims26
-48. (canceled)
An asymmetric siloxane, comprising:
- MDxM′ where M=R1R2R3SiO1/2 and M′=R4R5R6SiO1/2;
- wherein D=(R)2SiO, and x is an integer 0≦x≦10;
- each of R1, R2, R4 and R5 is independently the same or different and each is a hydrocarbon radical, an alkoxy radical or alkenyloxy radical and each of R3 and R6 is independently a different alkylene oxide moiety of 2 to 10 carbon atoms.
An asymmetric siloxane, comprising:
- an asymmetric siloxane comprising the chemical of Formula (5):
- MDxM′ (5)
- wherein each occurrence of M is independently R1R2R3SiO1/2;
- each occurrence of M′ is R4R5R6 SiO1/2;
- each occurrence of D is independently (R)2SiO;
- each occurrence of the subscript x is independently an integer from about 0 to about 10;
- each occurrence of R1, R2, R4 and R5 is independently selected from the group consisting of the same or different monovalent hydrocarbon radical of from 3 to 6 carbon atoms and the R8R9R10SiR12 radical wherein each occurrence R8, R9 and R10 is independently a monovalent hydrocarbon radical having from 1 to 6 carbon atoms, a monovalent aryl hydrocarbon radical having from 6 to 13 carbon atoms or a monovalent alkaryl hydrocarbon radical having from 6 to 13 carbon atoms and R12 is a divalent hydrocarbon radical having from 1 to 3 carbon atoms;
- and each occurrence of R3 and R6 is independently a different polyalkylene oxide moiety of 3 to 10 carbon atoms.
An asymmetric siloxane comprising 1-(2-trimethylsilylethyl)-1,1,3,3-tetramethyldisiloxane.
-81. (canceled)
Dependencies are inferred from the claim text.