Patent ID: 6429233
Filing Date: 2002-08-06
Classification: C08G,C08J,Y02W

Abstract:
A method for recycling a polyester chipwhich comprises providing a polyester chip (a) whose principal component of polybasic acid is terephthalic acid, a polyol (b) and a polybasic acid (c), with the total of (a), (b) and (c) being taken as 100 weight parts, subjecting 5 to 60 weight parts of said polyester chip (a) and 5 to 40 weight parts of said polyol (b) to transesterification reaction and reacting it with 10 to 60 weight parts of said polybasic acid (c) to give a reconstituted polyester resin having a number average molecular weight of 1000 to 10000, an acid value of 1 to 100, and a hydroxyl value of 30 to 200, the total number of moles of hydroxyl group being not less than 1.03 times the total number of moles of carboxyl group in the material for the production of said reconstituted polyester resin.