STABILISER COMPOSITIONS CONTAINING SUBSTITUTED CHROMAN COMPOUNDS AND METHODS OF USE Russian patent published in 2018 - IPC C07D311/72 C08K5/151 C08J3/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for improving process stability while reducing or preventing a colour change in a polymeric organic material to be processed, in a moulding process, selected from the group consisting of injection moulding, blow moulding, reel-to-reel moulding, metal injection moulding, compression moulding, transfer moulding, dip moulding, gas assist moulding, insert injection moulding, micro moulding, reaction injection moulding, two shot injection moulding, the method comprising adding to said polymeric organic material in an amount effective to improve process stability while reducing or preventing colour change, an additive composition containing a chroman compound corresponding to formula (V), wherein R₂₁ is COR₂₈, where R₂₈ is selected from H or C₁-C₆ alkyl; R₂₂ is presented in cases with n = 0 to 3 in the aromatic part of formula V and in each case is independently selected from a C₁-C₁₂ hydrocarbon radical; R₂₃ is selected from H or C₁-C₁₂ hydrocarbon radical; R₂₄ is selected from H or C₁-C₂₀ hydrocarbon radical; and each of R₂₅, R₂₆ and R₂₇ is H. Invention also relates to a moulded article obtained by said method.

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EFFECT: technical result is the reduction or prevention of colour change the polymer material.

24 cl, 3 dwg