Patent ID: 6500303
Filing Date: 2002-12-31
Classification: C07D,C08K,D21C,D21H

Abstract:
A hindered nitroxide compound of formula IV, V, VI, VII or VIII whereinn is 2 to 3, G1 is hydrogen, methyl, ethyl, butyl or benzyl, X is inorganic or organic anion, when x is 1, R1 and R2 are independently alkyl of 1 to 18 carbon atoms, said alkyl interrupted by one to five oxygen atoms, said alkyl substituted by 1 to 5 hydroxyl groups or said alkyl both interrupted b said oxygen atoms and substituted by said hydroxyl groups; cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one to three alkyl of 1 to 8 carbon atoms, or R1 is also hydrogen, or R1 and R2 are together tetramethyl, pentamethylene, hexamethylene or 3-oxapentamethylene, when x is 2, R1 is hydrogen, alkyl of 1 to 8 carbon atoms, said alkyl interrupted by one or two oxygen atoms and substituted by a hydroxyl group, R2 is alkylene of 2 to 18 carbon atoms, said alkylene interrupted by one to five oxygen atoms, said alkylene substituted by 1 to 5 hydroxyl groups or said alkylene both interrupted by said oxygen atoms and substituted by said hydroxyl groups; o-, m- or p-phenylene or said phenylene substituted by one or two alkyl of 1 to 4 carbon atoms, or R2 is -(CH2)kO[(CH2)kO]h(CH2)k-where k is 2 to 4 and h is 1 to 40, or R1 and R2 together with the two N atoms to which they are attached are piperazin-1,4-diyl, when x is 3, R1 is hydrogen, R2 is alkylene of 4 to 8 carbon atoms interrupted by one nitrogen atom, R1 is hydrogen, R2 is alkylene of 6 to 12 carbon atoms interrupted by two nitrogen atoms, R3 is hydrogen, alkyl of 1 to 8 carbon atoms, said alkyl interrupted by one or two oxygen atoms, said alkyl substituted by b hydroxyl group, or both interrupted by one or two oxygen atoms and substituted by a hydroxyl group, p is 2 or 3, and Q is an alkali metal salt, ammonium or N+(G1)4.