FIELD: chemistry.
SUBSTANCE: invention relates to method of producing higher-thermal stability polyester resins. This invention proposes the method of producing higher-thermal stability polyester resins via interaction of terephthalic acid dimethyl ether with 1,4-butylene glycol in melt at 150 to 220°C in the presence of organically modified clays in the amount of 1 to 10 wt % polyether. In compliance with the proposed invention, spatially unfavourable phenol (0.1 wt % polymer), tri-nonyl phenyl phosphite or three(2,4-di-tretbutylphenyl)phosphite (0.35) and calcium hypophosphite (0.05) are used as thermally stabilising system with synergistic properties, while boric acid, boric anhydride, sodium borate or their mix with tetrabutoxititanate (0.05 to 0.1% of the of polymer weight) are used as a catalyst. The formed product is subjected to polycondensation at residual pressure of 0.1 mm Hg. and at temperatures of 220 to 250°C.
EFFECT: method of producing complex high thermal stability aliphatic-aromatic polyethers.
1 cl, 2 tbl, 10 ex
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