Poly 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylesters useful as thermal stabilizers for synthetic polymers
申请人:LAGOR SPA
公开号:EP0286887A1
公开(公告)日:1988-10-19
Poly-dihydro-2,6-dimethylpyridine-3,5-dicarboxylesters of general formula (I)
in which A, B, m, n, k, j, R, R¹ and R² have the meanings defined in the text, useful as thermal stabilizers for synthetic polymers, in particular for polyvinylchloride-based masses.
The compounds of formula (I) are preferably used in combination with the usual stabilizers based on organic metal derivatives. They can also be used combined with agents which exert a synergic action in maintaining a low colour of manufactured articles subjected to heating, and in particular with betadicarbonyl compounds of formula (II):
R³-CO-CH₂-CO-R⁴ (II)
in which R³ and R⁴ have the meanings defined in the text, in masses containing organic calcium and zinc salts as basic stabilizers.
通式(I)的聚二氢-2,6-二甲基吡啶-3,5-二羧酸酯
其中 A、B、m、n、k、j、R、R¹ 和 R² 具有文中定义的含义,可用作合成聚合物的热稳定剂,特别是聚氯乙烯基质的热稳定剂。
式(I)化合物最好与基于有机金属衍生物的常用稳定剂结合使用。它们还可以与具有协同作用的制剂,特别是与式 (II) 的偏二羰基化合物结合使用,以保持受热制成品的低色度:
R³-Co-CH₂-Co-R⁴ (II)
其中 R³ 和 R⁴ 具有文中定义的含义,在含有作为碱性稳定剂的有机钙盐和锌盐的混合物中。