摘要:
Chroman derivatives of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each H or C.sub.1 -C.sub.4 -alkyl, R.sup.5 is C.sub.10 -C.sub.30 -alkyl or C.sub.10 -C.sub.30 -alkenyl, X and Y are each O, NH or S, m is 0, 1, 2 or 3 and n and r are each 0 or 1, the preparation of compounds I by various methods known per se, and the use of the compounds as stabilizers for organic materials.
摘要:
Novel chroman derivatives ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are each H or C.sub.1 -C.sub.4 -alkyl, R.sup.6 and R.sup.7 are each H, C.sub.1 -C.sub.4 -alkyl or aryl, m is 1, 2 or 3, and R.sup.8 is alkyl or alkenyl of up to 30 carbon atoms, the preparation of these compounds, and their use as stabilizers for organic materials.
摘要:
Novel chroman derivatives ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each H or C.sub.1 -C.sub.4 -alkyl, R.sup.5 is sec.--C.sub.3 -C.sub.8 --alkyl or tert.--C.sub.4 -C.sub.8 --alkyl, R.sup.6 is H or R.sup.5, m is 1, 2 or 3, and n is 0, 1, 2 or 3, a process for the preparation of these compounds, and their use as stabilizers for plastics.
摘要:
New bis-[4-(m,m'-di-tert.-butyl-p-hydroxyphenyl)-butyl-(2)] dicarboxylic acid esters which are starting materials for the manufacture of dyes, pesticides and additives for plastics, especially stabilizers for polyolefins and polyamides, and are themselves stabilizers, aging retardants or antioxidants for organic products.