FIELD: chemistry.
SUBSTANCE: polyester composition contains a polyester polymer, having repeating alkylene arylate links, aluminium atoms and catalytically active titanium atoms. The polyester polymer has characteristic viscosity of at least 0.72 dl/g and residual content of acetaldehyde in polymer particles of 10 ppm or less. Aluminium atoms are residues of an aluminium compound of formula: Al[OR]a[OR']b[OR"]c[R'"]d, where R, R', R" denote an alkyl, aryl, acyl group or hydrogen, and R'" is an anionic group. The method of producing polyester polymers involves adding phosphorus atoms to molten polyester containing aluminium atoms and additional atoms of an alkali-earth metal or atoms of an alkali metal or residues of alkaline compounds, and catalytically active titanium atoms. Phosphorus atoms are added to the molten polyester before or after meeting conditions a), b), c), d), e) and f), given in the claim, but before the molten polyester solidifies.
EFFECT: improved method.
35 cl, 10 tbl, 6 ex
