Ciba Specialty Chemicals Corporation

Wintershall Holding Gmbh

Peter Hänggi

Hugo Camenzind

Alfred Dratva

Samuel Evans

Paul Dubs

Markus Hansch

Michèle Gerster

Andreas Mühlebach

Roger Martin

Fabien Jean Brand

François Rime

Described is a novel process for the preparation of substituted tris(2-hydroxyphenyl)methane derivatives and the use of tris(2-hydroxyphenyl)methane derivatives for tertiary mineral oil production.

Process for the preparation of substituted TRIS(2-hydroxyphenyl)methane

The present invention relates to a block copolymer prepared by ATRP, wherein the polymer chain terminal group is structurally modified with the functionally effective group of a lubricant or polymer additive selected from the group consisting of antioxidants, metal deactivators, antiwear and extreme pressure additives and corrosion inhibitors. The invention also relates to a composition comprising the structurally modified block copolymer and a composition of matter subject to oxidative, thermal or light induced degradation, such as lubricants or polymers.

Polymers produced by atom transfer radical polymerisation technique with structurally modified terminal groups

This invention relates to compounds which are suitable as ash-free antiwear additives and antioxidants, to lubricant compositions comprising said compounds as well as to their use. Compounds of formulae ##STR1## are particularly preferred. In the preferred compounds I',

Heterocyclic thioethers as additives for lubricants

Suitable lubricant additives are the compounds of formulae wherein the substituents and groups have the following preferred meanings:

Benzothiazolylthio or thiadiazolylthio substituted phenols as

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Giffers, Switzerland

Peter Hänggi