Title:
ポリエステルの製造方法
Document Type and Number:
Japanese Patent JP7188146
Kind Code:
B2
Abstract:
To produce an inorganic particle-containing polyester with good productivity obtained by uniformly dispersing inorganic particles in a polyester.SOLUTION: There is provided a method for producing a polyester in which a main repeating unit is an ethylene terephthalate unit, which comprises an esterification reaction step and a polycondensation reaction step of an oligomer obtained by the esterification reaction step, wherein the molar ratio of ethylene glycol to terephthalic acid used for producing the oligomer is 1.14 to 1.30, polycondensation reaction is performed after mixing the oligomer and a glycol slurry containing inorganic particles and the inorganic particles in the glycol slurry containing inorganic particles have an average particle diameter (d50) of 0.02 to 5.0 μm and a particle size distribution value (d90/d10) of 1.1 to 3.0.SELECTED DRAWING: None
Inventors:
Hiroyuki Kitamura
Application Number:
JP2019017138A
Publication Date:
December 13, 2022
Filing Date:
February 01, 2019
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
C08G63/78; C08G63/183
Domestic Patent References:
| JP63312319A | ||||
| JP2002030139A | ||||
| JP11349675A | ||||
| JP4001224A | ||||
| JP2013049785A | ||||
| JP4175336A |
Attorney, Agent or Firm:
Tsuyoshi Shigeno
Takayuki Shigeno
Takayuki Shigeno
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