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Patent Searching and Data


Title:
METHOD FOR PRODUCING POLYMER
Document Type and Number:
WIPO Patent Application WO/2018/008318
Kind Code:
A1
Abstract:
This method for producing a polymer produces a polymer which has at least two peaks in the molecular weight distribution curve of the polymer as obtained by molecular weight measurement by means of GPC, and which is a conjugated diene polymer or a copolymer of an aromatic vinyl compound and a diene compound. This method for producing a polymer uses a reaction apparatus wherein two or more reactors for continuous polymerization are connected in series with each other. A polymerization reaction is carried out by introducing a monomer component and a polymerization initiator into the first reactor; and subsequently, polymerization is carried out by adding a monomer component and a polymerization initiator just before each of the second and subsequent reactors. The weight average molecular weight of a polymer (A) obtained in the first reactor is from 300,000 to 2,000,000.

Inventors:
NAKATANI, Kenji (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
Application Number:
JP2017/021032
Publication Date:
January 11, 2018
Filing Date:
June 06, 2017
Export Citation:
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Assignee:
BRIDGESTONE CORPORATION (1-1 Kyobashi 3-chome, Chuo-ku Tokyo, 40, 〒1048340, JP)
International Classes:
C08F2/00; C08F36/04
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (OHTANI PATENT OFFICE, Toranomon ES Bldg. 7F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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