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Title:
RECYCLED POLYESTER RESIN OBTAINED BY USING COLORED PET FABRIC AS MATERIAL, AND METHOD FOR OBTAINING ESTER MONOMER FROM COLORED PET FABRIC
Document Type and Number:
WIPO Patent Application WO/2023/176649
Kind Code:
A1
Abstract:
A recycled polyester resin obtained by using colored PET fabric as a material, the recycled polyester resin being a polyethylene terephthalate resin comprising 88-100 mol% of a terephthalic acid residue with respect to all acid components, and 88-100 mol% of an ethylene glycol residue with respect to all diol components, wherein the polyethylene terephthalate resin has (1) a diethylene glycol percentage content of not less than 0.1 mass% but less than 0.8 mass%, (2) a nitrogen atom percentage content of 0.5-15.0 mass ppm, and (3) a b-value in the Hunter color tone of not less than -10.0 but less than 5.0.

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Inventors:
WATARI IPPEI (JP)
MAKINO MASATAKA (JP)
Application Number:
PCT/JP2023/008940
Publication Date:
September 21, 2023
Filing Date:
March 08, 2023
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08G63/183; B01D15/00; B29B17/02; C08J11/24
Foreign References:
JP2020176258A2020-10-29
JP2005255963A2005-09-22
JP2008088096A2008-04-17
JP2007045874A2007-02-22
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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