FIELD: polymer production.
SUBSTANCE: invention provides a method for hydrogenation of polyester oligomers containing terephthalic and isophthalic acid residues, which are thereby converted into 1,4-cyclohexanedicarboxylic acid residues. Also proposed is a method for preparing polyesters containing 1,4-cyclohexanedicarboxylic acid residues by hydrogenating first polyester oligomer containing terephthalic acid residues followed by reacting thus obtained oligomer with one or several polyester-forming reagents to form higher molecular weight polyester. Another embodiment of invention involves hydrogenation of polyester oligomers containing isophthalic acid residues, which residues are converted into 1,3-cyclohexanedicarboxylic acid residues.
EFFECT: expanded synthetic possibilities.
13 cl, 1 tbl, 15 ex
