| abstract |
To provide a novel branched siloxane-silalkylene copolymer whose molecule contains a plural number of silicon-bonded hydrogen atoms or silicon-bonded alkoxy groups.Carbosiloxane dendrimer that contains at least one siloxane unit with the general formula{R1 is C1 to C10 alkyl or aryl, a is an integer from 0 to 2, and X1 is the silylalkyl group with the following formula at i=1(R1 is C1 to C10 alkyl or aryl, R2 is C2 to C10 alkylene, R3 is C1 to C10 alkyl, Xi+1 is the hydrogen atom or the above-defined silylalkyl group at i=i+1, i is an integer with a value from 1 to 10 that specifies the generation of the said silylalkyl group, and bi is an integer from 0 to 3 with the proviso that b1 in at least one X1 in each molecule is an integer from 0 to 2)}wherein when more than 1 is present these siloxane units may be the same or different, and whose core is a polysiloxane structure that contains at least 2 silicon atoms and the aforesaid siloxane unit(s). |