Title:
共重合ポリエステル樹脂
Document Type and Number:
Japanese Patent JP6500440
Kind Code:
B2
Abstract:
The present invention is a copolymerized polyester resin which contains a dicarboxylic acid component and diol components as constituting components, wherein greater than or equal to 90 mol % of terephthalic acid is contained as the dicarboxylic acid component, 39 to 79 mol % of ethylene glycol, 20 to 60 mol % of neopentyl glycol and 1 to 5 mol % of diethylene glycol are contained as the diol components, the reduced viscosity of the resin is greater than or equal to 0.50 dl/g, the number of contaminants having a particle diameter of greater than or equal to 5 μm is less than or equal to 100 per 1 mm2 in a sample of the copolymerized polyester resin having a thickness of 0.8 to 0.9 mm. The copolymerized polyester resin has a higher degree of clarification than conventionally known copolymerized polyesters and also has excellent color hue and heat resistance.
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Inventors:
Hideto Ohashi
Hiroyuki Nobuyuki
Hiroyuki Nobuyuki
Application Number:
JP2014561611A
Publication Date:
April 17, 2019
Filing Date:
October 22, 2014
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
C08G63/183; C08G63/84; C08J5/18; C09J167/02
Domestic Patent References:
| JP2009073962A |