Ester modified cross-linked silicone compositions

A method for preparing a polymer having branched silicone comprising reacting:

• (a) a Si—H functional compound of formula (I):
• MHaMbDHcDdTHeTfQg (I)
• wherein:
• MH=R1R2HSiO1/2;
• M=R3R4R5SiO1/2;
• DH=R6HSiO2/2;
• D=R7R8SiO2/2;
• TH=HSiO3/2;
• T=R9SiO3/2;
• and
• Q=SiO4/2;
• wherein
• R1, R2, R3, R4, R5, R6, R7, R8, and R9 are independently an aliphatic, aromatic, or fluoro monovalent hydrocarbon having from 1 to 60 carbon atoms;
• and
• a, b, c, d, e, f, and g are independently zero or a positive integer, such that 2≤a+b+c+d+e+f+g≤6000 and when a′+c′+e′=2, a+c+e>2 and wherein e+f+g≥1;
• (b) a carboxy functional olefin of formula (II):
• wherein
• R′ is a combination of R1 and —Si(Ra)3, wherein R1 is an aliphatic, aromatic, or fluoro monovalent hydrocarbon having from 1 to 60 carbon atoms and Ra is an aliphatic, aromatic, or fluoro monovalent hydrocarbon, and;
• n is 0≤n≤30;
• and
• (c) a silicone based alkenyl functional cross-linker of formula (III) and/or a non-silicone based alkenyl functional cross-linker of formula (IV):
• M1a′,M2b′D1c′D2d′T1e′T2f′Qg′
• wherein:
• M1=R10R11R12SiO1/2;
• M2=R13R14R15SiO1/2;
• D1=R16R17SiO2/2;
• D2=R18R19SiO2/2;
• T1=R20SiO3/2;
• T2=R21SiO3/2;
• and
• Q=SiO4/2;
• wherein
• R11, R12, R13, R14, R15, R17, R18, R19, and R21, are independently an aliphatic, aromatic, or fluoro monovalent hydrocarbon having from 1 to 60 carbon atoms;
• R10, R16, R20 and are each a monovalent radical containing at least one terminal olefin bond;
• a′, b′, c′, d′, e′, f′, and g′ are independently zero or a positive integer, such that 2≤a′+b′+c′+d′+e′+f+g′≤6000 and when a+c+e=2, a′+c′+e′>2;
• Z is —(CHR22)m— or —(CH2CHR23O)k—, wherein m and k are positive integers, such that 1≤m≤60 and 1≤k≤500, and R22 and R23 are independently hydrogen or monovalent hydrocarbon having from 1 to 60 carbon atoms;
• and
• wherein an average number of crosslinks between branched silicones is between 1 and 30.