COMPOSITE ESTER COMPOUND, PLASTICIZING COMPOSITION BASED ON IT, METHOD FOR PRODUCTION OF PLASTICIZING COMPOSITION, AND PVC-COMPOSITION CONTAINING COMPOSITE ESTER COMPOUND OR PLASTICIZING COMPOSITION Russian patent published in 2022 - IPC C08K5/11 C08K5/12 C07C67/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for the production of a plasticizing composition, which is composite esters of dicarboxylic acids of a cyclic or non-cyclic structure and oxyalkylated aliphatic (acyclic and/or cyclic one and mixtures thereof) C₄-C₁₀ alcohol with a various degree of oxyalkylation of a symmetrical or asymmetrical structure, corresponding to the general formula 1. In this case, B is C₁-C₈ alkylene of a cyclic or non-cyclic structure, or is absent. In case of symmetrical esters of dicarboxylic acids: R¹=R²=[CH(R)-CH₂-O]_n-R³, where R=H or CH₃, R³=Alk, n=1.0-4.0. In case of asymmetrical esters of dicarboxylic acids: R¹=[CH(R)-CH₂-O]_n-R³, where R=H or CH₃, R³=Alk; R²=Alk, [CH(R)-CH₂-O]_x-R⁴, where R=H or CH₃, R⁴=Alk, x=1.0-4.0. At the same time, in the above-mentioned formulas, Alk is a cyclic or non-cyclic C₄-C₁₀ radical including, in the presence of an amphoteric type catalyst, inert gas, a solvent, and activated carbon, for the prevention of tarring of reaction mass, an esterification reaction of dicarboxylic acid of a cyclic or non-cyclic structure, containing C₁-C₈ alkylene of a cyclic or non-cyclic structure, or dicarboxylic acid anhydride with the first alcohol of Alk-O-[CH₂-CHR-O]_nH composition or alcohol of AlkOH composition, where Alk is an alkyl C₄-C₁₀ radical of a normal or cyclic structure, and further, without the isolation of monoester, subsequent esterification with corresponding alcohol at a boiling point of reaction mass in the presence of the same catalyst, where the molar ratio of dicarboxylic acid to alcohols is 1:(1-2.2), wherein the molar ratio of alcohol of Alk-O-[CH₂-CHR-O]_nH composition and alcohol of AlkOH composition is (0-2.2):(0-2.2). The invention also relates to a plasticizing composition based on composite ester, as well as to a polyvinylchloride composition for sheets or products.

EFFECT: obtaining a PVC-composition, in which a composition based on composite ester is used, having low toxicity, while maintaining good physical and mechanical and operational properties.

8 cl, 4 tbl, 42 ex