Abstract: The instant invention relates to a process for the preparation of stabilizers for polymers, especially for polyamides, by condensation of isophthalic acic dichloride (IPC) with sterically hindered amines of the type tetraalkylpiperidine. By using organic solvents or mixtures of organic solvents with water and by an optimized combination of temperature and pressure the yield is much higher than by using water alone. The organic load of the waste water could be significantly reduced.

Abstract: The present invention describes a process for preparing a synergistic stabilizer mixture comprising the components of the general formulae (I), (II) and (III) in accordance with claim 1, characterized by the reaction of compounds of the formula (V) with an epihalohydrin of the formula (VI) in the presence of a phase transfer catalyst and from 4 to 20 times the molar amount of an alkali metal hydroxide, relative to compound (V), at from 20 to 220° C. Removal of the excess epihalohydrin and phase separation are followed by polymerization at from 100 to 240° C.

Abstract: The instant invention relates to a process for the preparation of stabilizers for polymers, especially for polyamides, by condensation of isophthalic acic dichloride (IPC) with sterically hindered amines of the type tetraalkylpiperidine. By using organic solvents or mixtures of organic solvents with water and by an optimized combination of temperature and pressure the yield is much higher than by using water alone. The organic load of the waste water could be significantly reduced.

Abstract: The present invention describes a process for preparing a synergistic stabilizer mixture comprising the components of the general formulae (I), (II) and (III) in accordance with claim 1, characterized by the reaction of compounds of the formula (V) with an epihalohydrin of the formula (VI) in the presence of a phase transfer catalyst and from 4 to 20 times the molar amount of an alkali metal hydroxide, relative to compound (V), at from 20 to 220° C. Removal of the excess epihalohydrin and phase separation are followed by polymerization at from 100 to 240° C.

Abstract: The present invention relates to novel compounds of the formula (III) in which the substituents are as defined in the description, to a process for their preparation and to mixtures with other compounds. The compounds of the formula (III) are suitable for stabilizing organic material against the effect of light and heat.

Abstract: The present invention relates to the use of compounds of the formula (I) where the substituents are as defined in the description as a stabilizer for organic material against the harmful effect of light, oxygen and heat.

Abstract: The present invention relates to mixtures comprising the compound I in a proportion of 65-95% by weight, the compound II in a proportion of 5-35% by weight and the compound III in a proportion of 0-10% by weight wherein the substituents are as defined in the description, and to mixtures with other compounds. The mixtures are suitable for stabilizing organic material against the effect of light and heat.

Abstract: The present invention relates to novel UV stabilizers of the formula (I) ##STR1## where the substituents are as defined in the description. These compounds are highly suitable for stabilizing organic material, such as plastics, surface coatings, paints and oils, against the action of light, radiation, oxygen and heat.

Abstract: The present invention relates to additive mixtures having a nucleating action for plastic compositions, comprising nucleating agents based on dibenzylidenesorbitol, or derivatives therof, and amido-functional compounds. The aldehydes formed from the nucleating agents by decomposition during processing and use of the plastics treated therewith are collected and bound by adsorption, absorption and/or chemcial reaction.