The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2008
Filed:
Sep. 17, 2003
Mikio Yamahiro, Yokohama, JP;
Hisao Oikawa, Yokohama, JP;
Kazuhiro Yoshida, Yokohama, JP;
Kenya Ito, Yokohama, JP;
Yasuhiro Yamamoto, Yokohama, JP;
Masami Tanaka, Yokohama, JP;
Nobumasa Ootake, Yokohama, JP;
Kenichi Watanabe, Yokohama, JP;
Kohji Ohno, Uji, JP;
Yoshinobu Tsujii, Uji, JP;
Takeshi Fukuda, Uji, JP;
Mikio Yamahiro, Yokohama, JP;
Hisao Oikawa, Yokohama, JP;
Kazuhiro Yoshida, Yokohama, JP;
Kenya Ito, Yokohama, JP;
Yasuhiro Yamamoto, Yokohama, JP;
Masami Tanaka, Yokohama, JP;
Nobumasa Ootake, Yokohama, JP;
Kenichi Watanabe, Yokohama, JP;
Kohji Ohno, Uji, JP;
Yoshinobu Tsujii, Uji, JP;
Takeshi Fukuda, Uji, JP;
Chisso Corporation, Osaka, JP;
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 Ris hydrogen, alkyl, aryl or arylalkyl; Rand Rare alkyl, phenyl or cyclohexyl; and A is a group having an ability to initiate polymerization of a monomer.