POLYESTER, METHOD OF IMPARTING WHITENESS TO POLYESTERS, TONIC COMPOSITION OF PREMIX, MOLDED PRODUCT Russian patent published in 1999 - IPC

FIELD: polymer materials. SUBSTANCE: invention provides new cast polyester or polyester in the form of fibrils prepared by copolymerization of a polyester with at least one blue 1,4-bis(2,6-dialkylanilino) anthraquinone compound of general formula I: (I), wherein R, R₁-R₅, X, m, and n are defined in claim 1 of invention, in amount sufficient to enhance intrinsic whiteness of polyester taking part in copolymerization, and also with at least one red anthraquinone or anthrapyridone compound selected from group including compounds with general formula II: (II), wherein R₆ and p are defined in claim 1 of invention, which enable adaptability of tonic system to polyesters having yellow color to confer on them required shade from neutral to light blue. These heat-resistant colored compounds can contain reactive polyester groups which, in the polymerization process, are preferably included into polyester polymer structure. EFFECT: extended color spectrum of polymer materials. 13 cl, 12 tbl, 346 ex