Title:
METHOD FOR PRODUCING POLYESTER RESIN COMPOSITION AND METHOD FOR REGENERATING COLLECTED POLYESTER RESIN
Document Type and Number:
WIPO Patent Application WO/2022/234749
Kind Code:
A1
Abstract:
Provided is a method for producing a polyester resin composition from a used polyester resin produced with at least one compound selected from among antimony, titanium, and germanium compounds as a polymerization catalyst, the polyester resin composition being less apt to suffer coloration or a decrease in molecular weight even when recycled multiple times. The method for producing a polyester resin composition (C) includes a step in which a collected polyester resin (A) and a polyester resin (B) containing an aluminum compound and a phosphorus compound are mixed together, the polyester resin (A) satisfying the following (1) to (3). (1) The polyester resin (A) contains at least one element selected from among antimony, titanium, and germanium. (2) The polyester resin (A) has a total content of antimony, titanium, and germanium elements of 2-500 mass ppm. (3) The polyester resin (A) has an intrinsic viscosity of 0.5-0.8 dl/g.
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Inventors:
SASAI TAMAYO (JP)
KINAMI MAKI (JP)
YAMAMOTO YU (JP)
NISHINAKA FUMIAKI (JP)
MORIYAMA NOBUO (JP)
KINAMI MAKI (JP)
YAMAMOTO YU (JP)
NISHINAKA FUMIAKI (JP)
MORIYAMA NOBUO (JP)
Application Number:
PCT/JP2022/015371
Publication Date:
November 10, 2022
Filing Date:
March 29, 2022
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08L67/02
Domestic Patent References:
| WO2012029725A1 | 2012-03-08 | |||
| WO2013154042A1 | 2013-10-17 | |||
| WO2013154043A1 | 2013-10-17 | |||
| WO2007032325A1 | 2007-03-22 |
Foreign References:
| JP2015028962A | 2015-02-12 | |||
| JP2014239128A | 2014-12-18 | |||
| JP2014170914A | 2014-09-18 | |||
| JP2006096789A | 2006-04-13 | |||
| JP2007056101A | 2007-03-08 | |||
| JP2007182477A | 2007-07-19 | |||
| JP2003261666A | 2003-09-19 | |||
| JP2003268095A | 2003-09-25 | |||
| JP2006169432A | 2006-06-29 | |||
| JP2021078749A | 2021-05-27 |
Attorney, Agent or Firm:
USFI PATENT ATTORNEYS INTERNATIONAL OFFICE (JP)
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