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Glycolyzed PET waste and castor oil‐based polyols for two‐pack coating systems
Author(s) -
Patel MR,
Patel JV,
Sinha VK
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2086
Subject(s) - polyester , polyol , castor oil , materials science , gel permeation chromatography , coating , fourier transform infrared spectroscopy , polyethylene terephthalate , ethylene glycol , polyurethane , polyethylene glycol , chemical engineering , condensation polymer , organic chemistry , bottle , polymer chemistry , chemistry , polymer , composite material , engineering
Useful coating products may be obtained by chemical valorization (glycolysis) of post‐consumed poly(ethylene terephthalate) (PET) wastes. Glycolysis of PET waste was carried out using poly(ethylene glycol) (PEG) of various molecular weights (200, 400, 600). The depolymerized oligoesters obtained were transesterified with castor oil which results in the formation of saturated hydroxyl‐functional polyester polyols. Two‐pack coating systems were formulated using these resins as base component and melamine formaldehyde resins as hardener component. Cured films were tested for their mechanical and chemical performances. The glycolysis of PET using PEG and polyester polyol formation was characterized using Fourier transform infrared spectroscopy and the molecular weights were determined using gel permeation chromatography. Copyright © 2006 Society of Chemical Industry