US 6,306,992 B1Granted

Carbosiloxane dendrimer and dendrimer-containing organic polymers

AssigneeDow Corning Toray Silicone Co., Ltd.

InventorsMakoto Yoshitake, Tadashi Okawa, Yoshitsugu Morita, Haruhiko Furukawa

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Abstract

A novel carbosiloxane dendrimer is disclosed containing a radically polymerizable group in the molecule and which possesses excellent polymerization reactivity. The carbosiloxane dendrimer can be used to provide organic polymers as afforded by the polymerization of the carbosiloxane dendrimer either alone or with other organic monomers. The radically polymerizable group-functional carbosiloxane dendrimer with the general formula (R1 is C1 to C10 alkyl or aryl, R2 is a divalent organic group excluding C1 to C10 alkylene, b is 1 to 3, X1 is a silylalkyl group, and Y is a radically polymerizable group). Also, dendrimer-containing organic polymer as afforded by the polymerization of (A) the aforesaid carbosiloxane dendrimer and (B) radically polymerizable organic monomer.

Claims4

Dependent claims

A radically polymerizable group-functional carbosiloxane dendrimer having the general formula

where R1 is C1 to C10 alkyl or aryl;
R2 is a divalent organic group excluding C1 to C10 alkylene;
b is 1 to 3;
X1 is the silylalkyl group with the following formula at i=1
where R1 is defined as above;
R3 is C2 to C10 alkylene;
R4 is C1 to C10 alkyl;
Xi+1 is selected hydrogen, C1 to C10 alkyl and aryl, and the above-defined silylalkyl group;
i is an integer with a value from 1 to 10 that specifies the generation of said silylalkyl group;
and ai is from 0 to 3;
and Y is a radically polymerizable group selected from
C2 to C10 alkenyl,
groups with the following general formula in which R5 is hydrogen or methyl
groups with the following formula in which R5 is hydrogen or methyl
and groups with the following formula
where R6 is hydrogen or methyl, R7 is C1 to C10 alkyl, and c is 0 to 4)}.

13 more elements

Dependencies are inferred from the claim text.