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Patent Searching and Data


Title:
STAR POLYMER AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2008/007709
Kind Code:
A1
Abstract:
Disclosed is a narrow-distribution star polymer having a controlled molecular structure. Also disclosed is a method for simply producing such a star polymer. Specifically disclosed is a method for producing a star polymer, which comprises a step (A) wherein an arm (I) is formed by bonding an anion end of a polymer having an anion end to a core, and a step (B) wherein an arm (II) is extended from the core by living radical polymerization. Also specifically disclosed is a star polymer characterized by having a structure represented by the formula (I-1) or (I-2) below. (I-1) (I-2) (In the formula (I-1) or (I-2), B, C1 and C2 independently represent a group composed of a polymer; m1 and m2 independently represent an integer of 1 or 2; and when m1 or m2 is 2, C1's or C2's represent the same as or different groups.)

Inventors:
NIITANI, Takeshi (12-54, Goiminamikaigan, Ichihara-sh, Chiba 45, 2900045, JP)
Application Number:
JP2007/063828
Publication Date:
January 17, 2008
Filing Date:
July 11, 2007
Export Citation:
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Assignee:
NIPPON SODA Co., LTD. (2-1 Ohtemachi 2-chome, Chiyoda-ku Tokyo, 65, 1008165, JP)
日本曹達株式会社 (〒65 東京都千代田区大手町二丁目2番1号 Tokyo, 1008165, JP)
International Classes:
C08F293/00; C08G85/00
Domestic Patent References:
WO2007029794A1
WO2006016665A1
WO2000012636A1
Foreign References:
JP2007220376A
JP2004256563A
JPH10195152A
JPH06219966A
JP2002540234A
JP2006188703A
Other References:
See also references of EP 2039710A1
MACROMOL.CHEM. vol. 189, 1998, pages 2885 - 2889
J.POLYMER SCIENCE 2003, page 3083
'Kagaku Binran Kisohen I (Handbook of Chemistry I, Basic Edition', 1993
J. AM. CHEM. SOC. vol. 118, no. 37, 1996, page 8647
Attorney, Agent or Firm:
HIROTA, Masanori et al. (3F Wakabayashi Building, 8-5 Akasaka 2-chome,Minato-k, Tokyo 52, 1070052, JP)
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