| 摘要 |
<p>Compounds of the formula (I) wherein either R1 represents a hydroxy group and R2 represents hydrogen or R1 represents hydrogen and R2 represents a hydroxy group, each of R3 and R4 independently represents hydrogen or alkyl, R5 represents alkyl, cycloalkyl, aralkyl, aryl, aralkyl or aryl groups which are monosubstituted, disubstituted or trisubstituted by hydroxy, alkyl, chlorine and/or alkoxy groups, or represents alkoxy, cycloalkoxy, aralkoxy, aryloxy or aralkoxy or aryloxy which is monosubstituted or disubstituted in the aryl moiety by alkyl, chlorine and/or alkoxy, R6 represents hydrogen, alkyl, cycloalkyl, aralkyl, aryl, aralkyl or aryl groups which are monosubstituted, disubstituted or trisubstituted by hydroxy, alkyl, chlorine and/or alkoxy groups, or represents alkoxy, cycloalkoxy, aralkoxy, aryloxy or aralkoxy or aryloxy which is monosubstituted or disubstituted in the aryl moiety by alkyl, chlorine and/or alkoxy groups,L is the monovelent anion of a carboxylic acid, M+ is an alkali metal ion, n and m are 1 to 2, p is 0, or 1 to 2, and q is 0 to 2 are suitable for stabilising polymer substrates.</p> |
