- Preparation method of multifunctional light stabilizer
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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.
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Paragraph 0057; 0059
(2020/11/26)
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- SYNTHESIS OF TRIACETONEDIAMINE COMPOUNDS BY REDUCTIVE AMINATION PROCEEDING FROM TRIACETONEDIAMINE AND DERIVATIVES THEREOF
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An N-substituted triacetonediamine compound is produced by reacting 4-amino-2,2,6,6-tetramethylpiperidine or a derivative thereof with a carbonyl compound in a reductive amination.
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Paragraph 0870-0873
(2018/02/22)
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- Preparation process of light stabilizer intermediate N-butyl-2,2,6,6-tetramethyl-4-piperidylamine
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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.
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Paragraph 0024; 0026; 0027; 0028; 0030; 0037; 0039; 0041
(2018/09/11)
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- Simple synthesizing method of N-butyl-2,2,6,6-tetramethyl-4-piperylhydrazine
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The invention belongs to the field of chemical synthesis, and in particular relates to a simple synthesizing method of N-butyl-2,2,6,6-tetramethyl-4-piperlhydrazine, comprising the following steps: (1) adding 2,2,6,6-tetramethylpiperidone, n-butylamine and an organic solvent into a reaction bulb, stirring for dissolving to obtain a mixed solution; (2) adding acetic acid as a catalyst to the mixed solution in the step (1), stirring and mixing uniformly; (3) adding metal hydride in batches to the mixed solution in the step (2); and (4) adding water, extracting with the organic solvent, separating an organic phase out, drying, desolventizing, carrying out reduced pressure distillation, and collecting the obtained N-butyl-2,2,6,6-tetramethyl-4-piperlhydrazine. The simple synthesizing method substitutes a chemical reductant reduction amination method for the original platinum catalysis high-pressure hydrogenation reduction amination method, avoids use of a pressure kettle and hydrogen gas, and has simple and safe operation and easy implementation.
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Paragraph 0023; 0024; 0025; 0026; 0027; 0028; 0029-0040
(2017/08/28)
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- MODIFIED ZNO NANOPARTICLES
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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.
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- Reductive amination of triacetoneamine with n-butylamine over Cu-Cr-La/γ-Al2O3
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A series of Cu-based catalysts were prepared and examined for the reductive amination of triacetoneamine with n-butylamine, thereinto, Cu-Cr-La/γ- Al2O3 showed excellent results. The catalysts were studied by XRD, XPS, H2-TPR and NH3-TPD. It was found that doped Cr remarkably enhanced the activity of Cu/γ-Al2O3 due to better dispersion of Cu0, which is believed to be the active site for the reductive amination. Additionally, it was obvious that introduction of La to Cu-Cr/γ-Al2O3 led to a higher selectivity and longer lifetime. The reaction parameters were optimized and N-butyl-2,2,6,6-tetramethyl-4-piperidinamine was obtained in a yield of 94%. Graphical Abstract: The addition of Cr does not impact obviously on the total acidity of Cu20/γ-Al2O3. However, the La addition to Cu20Cr5/γ-Al2O3 not only decreases the total acidity but also reduces the strength of acid sites. The introduction of La was found to result in a higher selectivity and longer lifetime. The conversion of TAA and selectivity of TEMPBA remained around 99.7 and 94.5% in 120 h.[Figure not available: see fulltext.][Figure not available: see fulltext.]
- Sun, Meng,Du, Xiaobao,Wang, Huabang,Wu, Zhiwei,Li, Yang,Chen, Ligong
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experimental part
p. 1703 - 1708
(2012/03/22)
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- 4-Formyl amino-n-methylpiperidine derivatives, the use thereof as stabilisers and organic material stabilised therewith
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The present invention relates to 4-formylamino-N-methylpiperidine derivatives of the formula (I) where the variables are as defined in the Description, to a process for preparing these piperidine derivatives, to the use of these piperidine derivatives of the invention, or prepared according to the invention, for stabilizing organic material, in particular for stabilizing plastics or coating materials, and also to the use of these piperidine derivatives of the invention, or prepared according to the invention, as light stabilizers or stabilizers for wood surfaces. The present invention further relates to stabilized organic material which comprises these piperidine derivatives of the invention or prepared according to the invention.
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- Piperidyl-triazine derivatives and their use as polymer stabilizers
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A compound of formula (I): STR1 wherein: R1 is hydrogen, alkyl, alkoxyalkyl, carboxylic acyl or phenylalkyl, or an optionally substituted tetramethylpiperidyl group: R2 is hydrogen, alkyl, carboxylic acyl or phenylalkyl group; R3 is alkylene optionally interrupted by at least one oxygen atom X is oxygen or --NR5 --; wherein R5 is hydrogen or alkyl,: Y is --OCO--, --COO--, --CONH-- or --OCONH--; n is 2 to 4; and, when n is 2, Z is alkylene optionally interrupted by at least one oxygen, sulfur or aryl, cycloalkyl or heterocyclic group, or, when n is 3, Z is alkanetriyl in which a carbon is optionally replaced by nitrogen or, when n is 4, Z is alkanetetrayl optionally interrupted by at least one oxygen atom and acid addition salts thereof are valuable polymer stabilizers.
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- Process for the preparation of 2,2,6,6-tetramethyl-4-piperidyl-amines
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A process for the preparation of 2,2,6,6-tetramethyl-4-piperidylamine of the formula (I) in which n is 1, 2 or 3 and, if n is 1, R is C1-C18-alkyl, C5-C12-cyclo-alkyl, C7-C9-phenylalkyl, tetrahydrofurfuryl, C2-C4-alkyl which is monosubstituted by OH, C1-C8-alkyloxy, C1-C8-alkylamino, cyclohexylamino or di(C1-C8-alkyl)amino, or C2-C6-alkyl which is substituted by an -NH2 group, or R is 2,2,6,6-tetramethyl-4-piperidyl, and, if n is 2, R is C2-C12-alkylene, cyclohexylene, methylenedicyclohexylene, cyclohexylene-dimethylene, xylylene or C4-C12-alkylene which is interrupted by 1, 2 or 3 oxygen atoms or 1 or 2 in which x and y are identical or different and are integers from 2 to 6 and z is zero or 1, characterized in that 2,2,6,6-tetramethyl-4--piperidone is reacted with an amine of the formula (III), , R-(NH2)n (III), , in which R and n are as defined above, in the presence of hydrogen and of a hydrogenation catalyst, unsupported or supported on an inert material, in the absence of a solvent or in the presence of a quantity of water less than 10 % by weight relative to the reaction mixture.
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- Process for preparing 1-oxa-3,8-diaza-4-oxo-spiro-[4,5]-decanes
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1-Oxa-3,8-diaza-4-oxo-spiro-[4,5]-decane compounds of the formula STR1 are new light stabilizers for protecting polymers from the damaging effect of UV radiation.
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- Certain [(2,2,6,6-tetramethyl-4-piperidyl)amino]-1,3,2-dioxaphosphorinanes useful as stabilizers for protecting resins
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Compounds of the formula I or II, STR1 wherein m is 1 or 2, A is branched or unbranched 1,2- or 1,3-alkylene, or o-phenylene, E is a group III or IIIa, R is hydrogen or methyl, R1 and R3 are hydrogen, alkyl, alkenyl, aralkyl, alkanoyl, alkenoyl, benzoyl or cyanomethyl, R2 is a radical of valency m and R4 is a monovalent radical, are effective processing stabilizers for polymers, in particular for polyolefins, and additionally have a stabilizing action against damage by light.
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- Poly-bis-triazinylimides, their preparation
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Poly-bis-triazinylimides of the formula STR1 are prepared from bis-(2,4-dichloro-1,3,5-triazin-6-yl)imides and polyalkylpiperidylamines. They are used as light stabilizers for polymers.
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