申请人:Ciba-Geigy Corporation
公开号:US04013621A1
公开(公告)日:1977-03-22
A compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently alkyl of 1 to 8 carbon atoms or cycloalkyl of 5 to 6 carbon atoms, R.sub.3 is hydrogen, lower alkyl of 1 to 4 carbon atoms or the group --SO.sub.2 (A.sub.2).sub.n R.sub.5, R.sub.4 and R.sub.5 are each independently alkyl of 1 to 18 carbon atoms or cycloalkyl of 5 to 12 carbon atoms, providing that R.sub.4 and R.sub.5 may each independently be hydrogen when n is 1, A.sub.1 and A.sub.2 are each independently phenyl, 1-naphthyl, 2-naphthyl, 2-(5,6,7,8-tetrahydro)naphthyl or p-phenylene, and n is 0 or 1 is prepared by reaction of a sulfonyl halide and a 2,6-substituted-4-aminophenol. The compounds are particularly effective in stabilizing unsaturated elastomeric compositions against oxidative degradation.
该化合物的化学式为##STR1##其中,R.sub.1和R.sub.2各自独立地为1至8个碳原子的烷基或5至6个碳原子的环烷基,R.sub.3为氢、1至4个碳原子的低烷基或--SO.sub.2(A.sub.2).sub.nR.sub.5的基团,R.sub.4和R.sub.5各自独立地为1至18个碳原子的烷基或5至12个碳原子的环烷基,前提是当n为1时,R.sub.4和R.sub.5各自独立地可以是氢,A.sub.1和A.sub.2各自独立地为苯、1-萘、2-萘、2-(5,6,7,8-四氢)萘或对苯二甲基,n为0或1。通过磺酰卤和2,6-取代-4-氨基苯酚的反应制备该化合物。该化合物对于稳定不饱和弹性体组分抵抗氧化降解特别有效。