36177-92-1Relevant articles and documents
Preparation method of multifunctional light stabilizer
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Paragraph 0057; 0059, (2020/11/26)
The invention provides a preparation method of a multifunctional light stabilizer, and particularly relates to the field of light stabilizers; the structure of the multifunctional light stabilizer isshown as follows, wherein the R1 is any one of oxygen, hydrogen, hydroxyl, halogen, C1-C20 alkyl, C4-C10 naphthenic base, C1-C12 alkoxy, C4-C12 naphthenyloxy, C1-C10 chain enyloxy or cyclic enyloxy, C1-C10 cyano substituted alkyloxy and C1-C15 aromatic alkoxy; and R2 is hydrogen, a C1-C20 alkyl group or an oxygen atom substituted C1-C20 alkyl group. The triazine multifunctional light stabilizer with the double hindered amine piperidine groups can be prepared, and the triazine multifunctional light stabilizer has more excellent ultraviolet absorption spectrum characteristics, free radical capturing capacity and high polymer compatibility and also has certain flame retardant characteristics.
Preparation process of light stabilizer intermediate N-butyl-2,2,6,6-tetramethyl-4-piperidylamine
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Paragraph 0024; 0026; 0027; 0028; 0030; 0037; 0039; 0041, (2018/09/11)
The invention discloses a preparation process of a light stabilizer intermediate N-butyl-2,2,6,6-tetramethyl-4-piperidylamine. The preparation process comprises the following steps: dissolving triacetonamine in excess n-butylamine, introducing hydrogen gas under the action of a metal catalyst, raising the temperature, and directly performing hydrogenated reduction and amination to obtain the target product N-butyl-2,2,6,6-tetramethyl-4-piperidylamine. The process disclosed by the invention has the advantages that the procedures are simple, no reaction medium is added, the capacity is big, by-products are few, the conversion rate of the main raw material triacetonamine is high, and the excess auxiliary material n-butylamine can be recycled.
MODIFIED ZNO NANOPARTICLES
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, (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.