POLYMER ADDITIVE AND A METHOD FOR THE PRODUCTION THEREOF

The invention relates to a compound of formula (I), characterised by the characteristic signals in the X-ray diffraction powder pattern measured with Cu Kalpha radiation (0.154 nm) at a 2-theta angleof 15.0 and 22.7 with a high intensity, and of 5.0, 11.3, 18.9, 20.8, 21.6 and 23.6 with a medium intensity, as well as to a method for producing the compound of formula (I) by reacting at least one isophthalic acid diester of formula (II) where R1 and R2 are the same or different and stand for an aliphatic group, with two equivalents 4-amino-2,2,6,6-tetramethylpiperidine, in the presence of at least one catalyst from the group of metal alcoholates and at a reaction temperature of between 50 and 150 DEG C. 本发明涉及式(I)的化合物，其特征在于在用Cu K射线(0.154nm)测得的X射线粉末图中在15.0和22.7的2θ角处具有高强度的特征信号和在5.0、11.3、18.9、20.8、21.6和23.6的2θ角处具有中强度的特征信号；以及制备式(I)的化合物的方法，其包括使至少种式(II)的间苯二甲酸二酯与2当量4-氨基-2,2,6,6-四甲基哌啶，在选自金属醇盐的至少种催化剂存在下和在50至150℃的反应温度下反应，其中R和R相同或不同并且是脂族基团。