Silicon compound

Details Silicon compound Silicon compound

2008-07-15

2008-07-15

Eashoo, Mark (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

C528S031000, C528S033000

Reexamination Certificate

active

07399819

ABSTRACT:
A large part of conventional organic-inorganic composite materials is obtained by mechanical blending silsesquioxanes with organic polymers, and therefore it has been very difficult to control the structure thereof as the molecular aggregate of the composite materials. An object of the present invention is to provide a novel silicon compound having a living radical polymerization-initiating ability for an addition-polymerizable monomer and a polymer obtained using the same to thereby solve the problem described above regarding the conventional organic-inorganic composite materials. The present inventors have found that a novel silsesquioxane derivative to which a group having an ability to initiate polymerization of a monomer is useful as means for solving the problem described above. That is, the silsesquioxane derivative of the present invention is represented by Formula (1):wherein R1is hydrogen, alkyl, aryl or arylalkyl; R2and R3are alkyl, phenyl or cyclohexyl; and A is a group having an ability to initiate polymerization of a monomer.

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Supplementary European Search Report mailed Jan. 22, 2008 for European application No. EP 03797641.
“Organic/Inorganic Nanocomposite Star Polymers via Atom Transfer Radical Polymerization of Methyl Methacrylate Using Octafunctional Silsesquioxane Cores”, Macromolecules, 2001, 34(16), pp. 5398-5407, XP-002464002.

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