abstract |
Tetrakis(3-(3,5-tert.-butyl- 4-hydroxyphenyl) propionyloxymethyl) methane (I) is prepd. by ester-exchange of pentaerythritol with 3-(3,5-di-tert-butyl- 4-hhydroxyphenyl)propionic acid alkyl ester in the presence of a basic catalyst and of bis(2,2,2-tris(hydroxy methyl)ethoxy)methane. |