Title:
塩化ビニル系重合体の製造方法
Document Type and Number:
Japanese Patent JP7291550
Kind Code:
B2
Abstract:
A method for producing a vinyl chloride type polymer is to produce the vinyl chloride type polymer by polymerizing a vinyl chloride monomer, or a mixture of a vinyl chloride monomer with a monomer copolymerizable with the vinyl chloride monomer in an aqueous medium by using a polymerization reactor. An aqueous solution of a copolymerized polyether having a weight-average molecular weight of 1,000 to 3,500 with a mole ratio of ethylene oxide to propylene oxide in the range of 10/90 to 60/40 is charged into the polymerization reactor with an amount of 0.005 to 0.050 part by weight as the copolymerized polyether relative to 100 parts by weight of the vinyl chloride monomer.
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Inventors:
Hiroshi Fukudome
Kumakura Kazuhiro
Norihiko Kawakubo
Kumakura Kazuhiro
Norihiko Kawakubo
Application Number:
JP2019113439A
Publication Date:
June 15, 2023
Filing Date:
June 19, 2019
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C08F2/20; C08F14/06
Domestic Patent References:
| JP11322838A | ||||
| JP2019025447A | ||||
| JP2292310A | ||||
| JP2004238522A | ||||
| JP2009062425A | ||||
| JP53114891A | ||||
| JP5032707A |
Attorney, Agent or Firm:
Toranomon Intellectual Property Office