The present invention relates to a process for preparing 2-alkylpolyisobutenylphenols and their Mannich adducts, to compositions obtainable by this process and to their use.

 
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> Optical elements made from ceramics comprising one or more oxides of Y, Sc, in and/or lanthanide elements and mapping optics including the optical elements

> System and method for modeling construction risk using location-based construction planning models
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