Stabilization of halogen-containing compounds, especially liquid crystal compounds, by addition of a 4-substituted 2,6-di-tertiary butyl-phenol, itself having liquid crystal-type units

摘要

Stabilization of halogen-containing compounds is effected by addition of a 4-substituted 2,6-di-tert. butyl-phenol. Stabilization of halogen-containing compounds is effected by addition of a 4-substituted 2,6-di-tert. butyl-phenol of formula (I). R<1> = H, 1-12C alkyl or alkoxy (optionally substituted once by -CN or -CF3 or once or more by halogen), -CN, -NCS, -OCN, -NO2, halogen, -OCF3 or -OCHF2; A = a single bond, cis- or trans-1,4-cyclohexylene, 1,4-phenylene or 1,4-cyclohex-3-enylene, with each of these groups optionally having 1-4 H atoms replaced by F and/or Cl; Z = -CH2CH2-, -HC=CH-, -C equivalent to C-, -C(O)O-, -CF2O-, -OCF2- or -CF2CF2-; and n = 0, 1, 2 or 3