26275-88-7Relevant articles and documents
MODIFIED ZNO NANOPARTICLES
-
, (2012/05/04)
Process for the preparation of modified zinc oxide nanoparticles, which comprises reacting zinc oxide nanoparticles, which are dissolved in a solvent, in the presence of ammonia or amines with a tetraalkyl orthosilicate and optionally with an organosilane, with the proviso that the reaction takes place at a content of less than 5% by weight of water, based on the total amount of solvent and water. Modified zinc oxide nanoparticles which have Si—O-alkyl groups and are soluble in organic solvents, obtainable by this process for the preparation. Liquid or solid formulations which comprise modified ZnO nanoparticles. Inanimate organic materials, for example plastics or coatings, which comprise modified ZnO nanoparticles. Method of stabilizing inanimate organic materials against the effect of light, free radicals or heat, where modified ZnO nanoparticles, which optionally comprise UV absorbers and/or stabilizers as further additives, are added to the materials.
Prevention of oxidation in petrochemical extraction solvents
-
, (2008/06/13)
A wide variety of hindered amine compounds are effective as antioxidant stabilizers to prevent the oxidation of liquid hydrocarbons and of oxygenated compounds, such as sulfolane or tetraethylene glycol, used as extraction solvents in the petroleum industry.
Piperidine derivatives, their production and use as stabilizers
-
, (2008/06/13)
The present invention relates to a piperidine derivative represented by the general formula (I), STR1 wherein R1 and R2 independently represent a hydrogen atom or a C1 -C3 alkyl or C2 -C20 acyl group, R3 represents a hydrogen atom or a C1 -C20 alkyl, C6 -C20 aryl, C7 -C20 aralkyl or C2 -C20 acyl group, and l represents 1 to 3, and a stabilizer for organic substances containing said piperidine derivative as an effective ingredient.