dinuclear aryl such as phenyl naphthyl and the like tri lower alkyleneamino such as trimethyleneamino triethyleneamino and the like or an unsaturated radical containing one or more ethylenic groups such as ethenyl 1 methylethenyl 3 butenyl 1 3 diyl 2 propenyl 1 2 diyl carboxy lower alkenyl such as 3 carboxy 2 propenyl and the like lower alkoxy carbonyl lower alkenyl such as 3 ethoxycarbonyl 2 propenyl and the like r 11 is hydrogen lower alkyl of from 1 to 5 carbon atoms such as methyl ethyl n propyl n butyl sec butyl tert butyl pentyl and the like or hydroxy lower alkyl of from 1 to 5 carbon atoms such as hydroxyethyl 3 hydroxypropyl 2 hydroxypropyl 4 hydroxybutyl 3 hydroxybutyl 2 hydroxy 2 methylpropyl 5 hydroxypentyl 4 hydroxypentyl 3 hydroxypentyl 2 hydroxypentyl and the isomers of pentyl r 12 and r 13 are the same or different radicals selected from hydrogen straight or branched chain lower alkyl of from 1 to 5 carbon atoms or one of the r 12 and one of the r 13 radicals may be joined to form together with the carbon atoms such as cyclopentyl cyclohexyl and the like n is an integer having a value of 1 or 2 and n u2032 is an integer having a value of 0 to 2 or when n u2032 is 0 a preferred u03b2 hydroxyalkyl amide compound is represented by structure iii as follows in structure iii r 11 is h lower alkyl or ho r 13 2 c r 12 2 c u2014.