Abstract:
The invention concerns substance mixtures containing: (A) compounds containi ng vinyl groups; (B) an active amount of a mixture which inhibits premature polymerization of the compounds containing vinyl groups and contains: (i) at least one N-oxyl compound of a secondary amine which does not carry any hydrogen atoms on the .alpha.-carbo n atoms; and (ii) at least one iron compound; (C) optionally nitro compounds; and (D) optionally co-stabilizers. The invention further concerns a process for inhibiting the premature polymerization of compounds (A) containing vinyl groups, and the use of mixture (B), optionall y mixed with nitro compounds (C) and/or co-stabilizers (D), for inhibiting the premature polymerization of radically polymerizable compounds and for stabilizing organic materials against the harmful effect of radicals.
Abstract:
Procedimiento para el almacenaje y el transporte de N-Vinil--caprolactama, caracterizado porque se emplea un recipiente termoaislado y/o calentable y se mantiene la N-Vinil--caprolactama a una temperatura de 35 hasta 100ºC en fase líquida.
Abstract:
The invention relates to compounds of the formula I in which m = 1 or 2 and n = 0, 1 or 2, R and R denote identical or different hydrogen, alkyl, alkoxy, halogen, hydroxyl, nitro, amino, alkylamino or acylamino radicals or R and R together represent methylenedioxy, R and R denote identical or different radicals of hydrogen, alkyl which can optionally be substituted, alkenyl, cycloalkyl, cycloalkenyl, cycloalkylalkyl, aryl, partially hydrogenated aryl or aralkyl which can be substituted, R and R denote identical or different radicals of hydrogen, alkyl or aralkyl which can be substituted, Y denotes hydrogen or hydroxyl, Z denotes hydrogen or Y and Z together denote oxygen and X represents alkyl, alkenyl, cycloalkyl, aryl which can be substituted or indolyl, a process for their preparation, compositions containing them and their use, and also intermediates in their preparation.