FIELD: polymer fibers.
SUBSTANCE: polyester fiber is prepared by catalytic polycondensation involving aromatic dicarboxylate. Catalyst contains a mixture of (i) titanium compound ingredient containing titanium alkoxide and at least one product of reaction of titanium alkoxide and a specific carboxylic acid or carboxylic acid anhydride and (ii) specific phosphorus compound ingredient. Catalyst can also be constituted by product of reaction of titanium compound and specific phosphorus compound.
EFFECT: enabled preparation of material characterized by satisfactory color tone and excellent suitability for knitting or weaving and dyeing.
5 cl, 2 tbl, 39 ex
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