- Process for preparing bis(1-alkoxy-2,2,6,6-tetramethyl-4-piperidyl) alkyl dibasic ester
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The invention provides a process for preparing bis(1-alkoxy-2,2,6,6-tetramethyl-4-piperidyl) alkyl dibasic ester. The reaction synthesizing route is as shown in the specification, wherein R1 and R2 are C6-C10 alkyl. According to the method, bis(1-alkoxy-2,2,6,6-tetramethyl-4-piperidyl) alkyl dibasic ester is prepared and synthesized by a two-step method, the method is simple in operation, less inenvironmental pollution and low in cost, and is an ideal process for industrial production.
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Paragraph 0049; 0050; 0051; 0052; 0069; 0070
(2018/04/03)
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- Preparation method of UV770
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The invention relates to a preparation method of UV770. The preparation method comprises the following steps: (S1) adding (a) 2,2,6,6-tetramethylpiperidine alcohol with the formula shown in the specification and (b) sebacic acid with the formula shown in the specification into a reaction tank, and carrying out fusion mixing; (S2) introducing nitrogen to protect the reaction; (S3) adding titanium catalysts into the reactor, and carrying out thermal response reaction; (S4) cooling reactants to 100-110 DEG C after the reaction is finished, and immediately filtering; and (S5) cooling filtrate, separating out crystals, washing, and further refining rough products to obtain the purified product UV770, or evaporating water to directly obtain the product. The preparation method has the characteristics of high reaction efficiency and convenience in refining.
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Paragraph 0029; 0030; 0031; 0032; 0033
(2017/05/30)
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- ULTRAVIOLET ABSORBER FOR SYNTHETIC RESIN AND SYNTHETIC RESIN COMPOSITION CONTAINING THE SAME
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The present invention relates to an ultraviolet absorber for synthetic resins composed of a triazine compound represented by the general formula (I) shown below (wherein R represents an alkyl group having 1 to 4 carbon atoms, n is 0 or an integer of up to 2, and X represents a group selected from the consisting of group (a) to (d) shown below) (wherein R1 represents an aliphatic group having 5 to 60 carbon atoms, which is an alicyclic group, an alkyl group having an alicyclic group at the terminal or in the chain thereof, an alkyl group having a branch, or a linear alkyl group, depending on the number of carbon atoms; R2 represents an alkyl group having 1 to 18 carbon atoms or a (poly)alkyleneoxyalkyl group; R' represents an aliphatic diyl group having 5 to 60 carbon atoms; R and n have the same meanings as those described in the general formula (I) above).
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- Benzophenone uv-absorbers with heterocyclic substituents
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Compounds having the formula: wherein R1 represents hydrogen, C1-C20 alkyl which is unsubstituted or substituted by one or more ammonium, mono-, di-, tri or tetra-C1-C12 alkylammonium groups or by one or more sulphonium groups or represents an aralkyl residue having a total of from 7 to 10 carbon atoms and, in which, the aryl group is unsubstituted or substituted by C1-C4alkyl, C1-C4 alkoxy or halogen and Z is a group selected from R2, R3 and R4, independently, representing hydrogen, C1-C4alkyl, C1-C4 alkoxy, halogen, NHCOC1-C4 alkyl or phenyl which is unsubstituted or substituted by. C1-C4 alkyl, C1-C4 alkoxy or halogen, a process for their preparation and use of the compounds of formula (1) as UV-absorbers which have improved absorption spectrum characteristics, superior resistance to exposure to UV light and excellent thermal stability, relative to known benzophenone compounds.
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- Phenyl ether-substituted hydroxyphenyl triazine ultraviolet light absorbers
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This invention relates generally to phenyl ether substituted triazines compounds and compositions containing same and their use to protect against degradation by environmental forces. A method for stabilizing a material by incorporating such triazines is also disclosed.
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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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- Novel red-shifted triazine ultravioletlight absorbers
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The present invention relates to novel red-shifted UV absorbers comprising 1,3,5-triazine structures containing a 2-naphthol-derived substituent. The present invention also relates to a method for stabilizing a material by incorporating into such material, e.g., organic material, the novel red-shifted triazine compounds in an amount effective to stabilize the material against the effects of actinic radiation.
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- Synergistic UV absorber combination
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A stabilizer composition comprising (A) a compound of the formula I wherein R is (CH2-CH2-O-)n-R2; -CH2-CH(OH)-CH2-O-R2; or -CH(R3)-CO-O-R4; n is 0 or 1; R2 is C1-C13alkyl or C2-C20alkenyl or C6-C12aryl or CO-C1-C18alkyl; R3 is H or C1-C8alkyl; R4 is C1-C12alkyl or C2-C12alkenyl or C5-C6cycloalkyl; and (B) one or more compounds selected from (i) to (xlv) as defined in claim 1 is especially effective towards stabilizing organic materials against degradation induced by light, heat or oxidation.
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- Phenyl ether-substituted hydroxyphenyl triazine ultraviolet light absorbers
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This invention relates generally to phenyl ether substituted triazines compounds and compositions containing same and their use to protect against degradation by environmental forces. A method for stabilizing a material by incorporating such triazines is also disclosed.
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- Amino- and hydroxysubstituted triphenyl-s-triazines as stabilizers
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The present invention provides compounds having the formula: in which R is hydrogen, hydroxy, halogen, C1-C20alkyl, C4-C12cycloalkyl, C2-C20alkenyl, C2-C20alkynyl, C1-C20-alkoxy, C4-C12cycloalkoxy, C2-C20alkenoxy, C2-C20alkynoxy or C7-C13aralkyl; R1 and R2, independently, are hydrogen, C1-C20alkyl, C4-C12cycloalkyl, C7-C13 aralkyl, —C(═O)-R4 (in which R4 is C1-C20alkyl, C2-C20alkyl interrupted by 1 to 6 oxygen atoms, hetero-substituted C1-C20alkyl, C4-C12cycloalkyl, C220alkenyl, C2C20alkynyl, C1-C20-alkoxy, C4-C12cycloalkoxy, C2-C20alkenoxy, C2alkynoxy, C6-C12 aryl, C6-C12 aryloxy or C7C13 aralkyl), or —C(═O)-NH-R1 in which R1 has its previous significance; and R3 is hydrogen, halogen, hydroxy, C1-C20alkyl, C4-C12cycloalkyl, C2-C20alkenyl, C2-C20alkynyl, C1-C20-alkoxy, C4-C12-cycloalkoxy, C2C20alkenoxy, C2-C20alkynoxy, phenyl, C7-C13 aralkyl or —N(R1)(R2) in which R1 and R2 have their previous significance, or R1 and R2 together form a C4-C12 membered ring. The new triphenyltriazine compounds have improved absorption spectrum characteristics and superior resistance to exposure to UV light, relative to known triphenyltriazine compounds.
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- Poly-trisaryl-1,3,5-Triazine carbamate ultraviolet light absorbers
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The present invention relates to novel carbamate containing trisaryl-1,3,5-triazines and the use thereof as an ultraviolet light absorber. In particular, the presently claimed compounds comprise a carbamate triazine polymer which is particularly useful, either alone or in combination with other additives, including other ultraviolet light absorbers and stabilizers, in stabilizing a polymeric film or molded article from degradation due to exposure to actinic radiation.
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- Non-yellowing para-tertiary-alkyl phenyl substituted triazine and pyrimidine ultraviolet light absorbers
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This invention relates generally to para-tertiary alkyl phenyl substituted pyrimidines and triazines and the use thereof to protect against degradation by environmental forces, inclusive of ultraviolet light, actinic radiation, oxidation, moisture, atmospheric pollutants and combinations thereof. The new class of para-tertiary alkyl phenyl substituted pyrimidines and triazines includes two tertiary alkylated phenyl groups, and a resorcinol or substituted resocinol group attached to the triazine or pyrimidine ring. These materials may, under the appropriate circumstances, be bonded to formulations comprising coatings, polymers, resins, organic compounds and the like via reaction of the bondable functionality with the materials of the formulation. A method for stabilizing a material by incorporating such para-tertiary alkyl phenyl substituted pyrimidines and triazines is also disclosed.
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- Biphenyl-substituted triazines
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Biphenyl-substituted triazines of the formulae which are notable for high thermal stability, are used as stabilizers for organic polymers to counter damage thereto caused by light, oxygen and heat, as light stabilizers for textile fiber materials and as sunscreens for the human skin.
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- Hydroxyphenyltriazines
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A description is given of compounds of the formula wherein R and R' independently are H, methyl or ethyl. The novel compounds are effective as stabilizers for organic material against the damaging effect of light, oxygen and heat; they are also suitable for use in skin or hair protection preparations.
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- Hydroxyphenyltriazines
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Compositions based on synthetic organic polymers or prepolymers are effectively stabilized against the damaging effects of light, oxygen and/or heat by addition of a compound of the formula I STR1 in which Z is a group of one of the formulae II or III, STR2 R7 and R17, independently of one another, are a radical of one of the formulae IV, V and VI STR3 and the remaining symbols are as defined in claim 1.
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- Phosphites and their production and use
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Phosphites represented by the general formula (I): STR1 wherein R1, R2, R4 and R5 independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms or a phenyl group; R3 and R6 independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms; X1 is a dihydric alcohol residue, wherein HO--X1 --OH defines the corresponding dihydric alcohol from which residue X1, is obtained; and X2 is a direct bond or an alkylene group having 1 to 8 carbon atoms; and the phosphites are useful as stabilizers for organic materials.
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- Process for preparing hindered amine light stabilizers
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Disclosed is a process for the preparation of hindered amine light stabilizers by reacting (a) an alkyl substituted-4-hydroxypiperidine with (b) a dicarboxylic acid ester, in the presence of a catalyst system comprising a basic inorganic compound and a polar aprotic organic compound.
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- Prevention of oxidation in petrochemical extraction solvents
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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.
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- Interaction of tert-Butylcalixarenes with Cyclic Amines
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p-tert Butylcalixarenes 1 and 2 react with the cyclic amines 3 - 8, 10 by proton transfer forming so -called "exo-complexes" between the ammonium and phenolate groups.As well endocyclic as exocyclic amino groups are reactive.The nitroxyl radical 9 does not react with 1 or 2 by the proton transfer reaction.These results demonstrate that an interaction between the nitrogen atom of HALS-compounds, esp. compound 10, with calixarene hydroxylgroups is possible, but an interaction between the corresponding nitroxyl radicals with calixarene hydroxylgroups does not occur.
- Goermar, Gerhard,Seiffarth, Klaus,Schulz, Manfred,Chachimbombo, Chitula Leopoldina
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p. 475 - 479
(2007/10/02)
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- A Reaction of Nitroxides with Ethyl Mercaptane: A Mild Method for the Conversion of Nitroxides into Their Corresponding Amines
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The mild reduction of the nitroxides 1a-j to the corresponding sterically hindered amines 2a-j by means of ethyl mercaptane is reported.The reaction mixtures of 1a,b,g were analyzed by glc/ms.
- Zakrzewski, Jerzy
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p. 803 - 808
(2007/10/02)
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- Piperidine derivatives, their production and use as stabilizers
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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.
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