Showing papers on "Benzotriazole published in 1983"

Tin, lead, and tin-lead alloy plating baths

Abstract: A tin, lead or tin-lead alloy plating bath, which comprises (A) a principal plating bath containing an alkanesulfonic or alkanolsulfonic acid, and either a divalent tin salt or a divalent lead salt thereof or both; (B) at least one of surfactants comprising (a) a cationic surfactant selected from the group consisting of quarternary ammonium salts, alkyl pyridinium salts, alkyl imidazolinium salts and higher alkyl amine salts, (b) an amphoteric surfactant selected from betaines, or (c) a nonionic surfactant selected from the group consisting of condensation products of ethylene oxide and/or propylene oxide with a styrenated phenol, a higher alcohol, an alkylphenol, an alkylnaphthol, a fatty acid amide, a sorbitan or a phosphate; and (C) at least one of levelling agents selected from the group consisting of alkylidene sulfamic acids, quinolinol derivatives, benzotriazole derivatives, dialkylidene o-phenylene diamines, benzaldehyde derivatives, triazine derivatives, salicylic acid derivatives and nitriles.

N-Alkylation of Pyrrole, Indole, and Several Other Nitrogen Heterocycles Using Potassium Hydroxide as a Base in the Presence of Polyethylene Glycols or Their Dialkyl Ethers

Abstract: The alkylation of pyrrole and indole in aqueous potassium hydroxide-organic two-phase systems in the presence of polyethylene glycols (PEG) or their dialkyl ethers (PEG-ether) as phase transfer catalysts (PTC) gave substantial quantities of the C-alkylated and C,N-polyalkylated products as well as the N-alkylated products. This fact is similar to that obtained in the presence of quaternary ammonium salts as PTC. In powdered potassium hydroxide-organic two-phase systems, the yields of the N-alkylated products were generally high. Especially, when PEG-ether were employed as solvents, the N-alkylated products were obtained in excellent yields under mild conditions. Imidazole, benzimidazole, carbazole, 2-methylindole, and benzotriazole were similarly N-alkylated in high yields by this method.

13C NMR study of annular tautomerism of azoles in the solid state

Abstract: Etude par spectrometrie RMN de 13 C de la tautomerie prototropique des triazole, tetrazole, indazole, benzimidazole et benzotriazole, de la tautomerie de fonction de la benzoxazolidinethione-2, et du tautomerisme non prototropique du trimethylsilyl-1 benzimidazole

Functional polymers. XXI

Abstract: Several 2(2-hydroxyphenyl)2H-benzotriazoles with more than one benzotriazole group substituted on di- and trihydroxybenzenes were synthesized by azo coupling ofo-nitrobenzenediazonium chloride with resorcinol or phloroglucinol followed by reductive cyclization with zinc powder and sodium hydroxide. By careful diazonium coupling witho-nitrobenzenediazonium chloride, the monobenzotriazyl compound, 4(2H-benzotriazole-2-yl)1,3-dihydroxybenzene [2(2,4-dihydroxyphenyl)2H-benzotriazole] was obtained. All compounds have unusual spectral characteristics with high extinction coefficients, cut off of the absorption below 400 nm and are excellent candidates for ultraviolet stabilizers.

Polyoxyalkylene polyamine triazole complexes

Abstract: Novel polyoxyalkylene polyamine triazole or benzotriazole complexes for diesel oils used in medium speed diesel engines.

Spectroscopic and electrochemical studies on linkage isomerism in iron(II) complexes of benzotriazole, a corrosion inhibitor

Abstract: Benzotriazole reacts with the aquapentacyanoferrate(II) complex, at pH 4.5, producing a mixture of N-coordinated isomers. Characterization based on 1H and 13C nmr spectroscopy yielded an equilibriu...

UV-Stabilized coated polyester-carbonate articles and process

Abstract: UV-stabilized coated polyester-carbonate articles may be prepared by adding to the coating compositions an effective amount of a benzophenone and/or benzotriazole UV absorber.

The chemical reactivity and molecular structure of 4,6-Dinitro-2-(2,4,6-trinitrophenyl) benzotriazole 1-oxide. A new heterocyclic super-electrophile

Abstract: The first preparation of the title compound (3) is reported and its reactivity with nucleophiles examined. Attack occurs at both the benzotriazole and the picryl ring moieties, the former process giving rise to spectrally observable Meisenheimer type σ-complexes, the latter to displacement. The results allow comparison to be drawn with the behaviour of 4,6-dinitrobenzofuroxan, which also acts as a super-electrophile. The structure of (3) has been determined from three-dimensional X-ray data collected from a single crystal. The material crystallized in space group Pbca of the orthorhombic system with eight molecules in a cell of dimensions a 16.050, b 11.478, c 17.823 A; V 3283.5 A3.

Process for coating wood or wood fibres-containing substrates, and an oxidatively drying coating composition to be used therewith

Abstract: This invention pertains to a process for coating wood or a wood fibres-containing substrate using an oxidatively drying coating composition based on an alkyd resin built up of an ethylenically unsaturated monocarboxylic acid, a saturated di- or polyvalent hydroxyl compound and a specific benzotriazole or benzophenone compound. The coating exhibits improved durability and ensures good protection of the substrate against the effects of ultraviolet radiation.

Functional polymers. XXII: Ultraviolet absorbers with 2(2-hydroxyphenyl) 2H-benzotriazole and 2-hydroxybenzophenone (or acetophenone) chromophors in the same molecule

Abstract: Benzotriazolization of 2,4-dihydroxyacetophenone and 2,4-dihydroxybenzophenone has given dibenzotriazolized products: 3,5- [di (2H-benzotriazole-2-yl)]2,4-dihydroxyacetophenone, and 3,5-[di (2H-benzotriazole-2-yl)] 2,4-dihydroxybenzophenone. These compounds are expected to be effective and useful UV absorbers as they both have the 2 (2-hydroxyphenyl)2H-benzotriazole unit and the 2-hydroxybenzophenone (or acetophenone) unit in the molecule. The compounds were characterized by their spectral behavior and particularly by careful study of their UV spectrum.

Stabilized 2-mercaptopyridene-1-oxide and derivatives

Abstract: A biocidal composition suitable for use as a stabilizer in polymer systems using 2-mercaptopyridene-1-oxide or a derivative combined with an organophosphorous compound and a benzotriazole wherein the organophosphorous compound and the benzotriazole act together to stabilize the mercaptopyridene against degradation and discoloration of the polymer system.

Process for the preparation of benozotriazoles and their polymers, and 2(2-hydroxy-5-isopropenylphenyl)2H-benzotriazole produced thereby

Abstract: The compound 2(2-hydroxy-5-isopropenylphenyl)2H-benzotriazole (2H5P) is produced by azo coupling of o-nitrophenyl diazonium chloride with p-hydroxyacetophenone, subjecting the resulting isolated azo compound to reductive cyclization with zinc in the presence of sodium hydroxide at a temperature of about 50°-70° C., acidifying the resulting mixture so as to produce (2(2-hydroxy-5-acetylphenyl)2H-benzotriazole (2H5A), acetylating the isolated 2(2-hydroxy-5-acetylphenyl)2H-benzotriazole (2H5A), so as to produce 2(2-acetoxy-5-acetylphenyl)2H-benzotriazole (2A5A), methylating the isolated 2(2-acetoxy-5-acetylphenyl(2H-benzotriazole (2A5A) with a methyl Grignard reagent and dehydrating the isolated reaction product with potassium hydrogen sulfate so as to produce 2(2-hydroxy-5-isopropenylphenyl)2H-benzotriazole (2H5P). The compound is used as a polymerizable ultra violet light stabilizer.

Brake fluid composition

Abstract: PURPOSE: To prepare a brake liquid composition stable to the formation of precipitate, and having improved corrosion-proofing property to copper in the presence of a rubber, by adding specific amounts of a benzotriazole (derivative) and a specific thiadiazole derivative to a base liquid of a brake liquid. CONSTITUTION: The objective brake liquid composition is prepared by adding (A) ≥0.01wt%, preferably 0.05W0.5wt% of a benzotriazole (derivative) and (B) ≥0.05wt%, preferably 0.1W0.5wt% of a thiadiazole derivative of formula (R 1 and R 2 are 1W8C alkyl) to a base liquid of a brake liquid. The preferable example of the component (B) is 2,5-bis (tert-octyldithio)-1,3,4-thiadiazole. COPYRIGHT: (C)1984,JPO&Japio

Image-receiving material for transfer recording

Abstract: PURPOSE:To obtain an image-receiving material for transfer recording excellent in light resistance, by incorporating an ultraviolet ray absorbent and a radical uptaking agent into an image-receiving layer, in an image-receiving material supporting a color developer for developing the color of a sublimable colorless dye or the like. CONSTITUTION:The image-receiving layer 11 consisting of a binder containing a color developer, an ultraviolet ray absorbent and a radical uptaking agent is provided on a base 12 such as an art paper or a cellulose acetate film. Activated clay or an organic material having at least one of a sulfonyl group and a carboxyl group is used as the color developer, while a compound selected from the group consisting of a salicylic acid derivative, a benzophenone base compound, a benzotriazole base compound and an acrylic acid derivative is used as the ultraviolet ray absorbent, and a compound selected from the group consisting of a naphthylamine base compound, a diphenylamine base compound and a phenol base compound is used as the radical scavenger. Each of the ultraviolet ray absorbent and the radical uptaking agent is used in a quantity of 0.1- 30wt% of the weight of the color developer.

Heteropentalenes. The oxidation of pyrazolo[1,2-a]benzotriazoles

Abstract: The dye-sensitized photo-oxidation of 1,3-dimethylpyrazolo[1,2-a]benzotriazole (3) affords 4-benzo-triazol-1-yl-3,4-epoxypentan-2-one (5) and 4-benzotriazol-1-ylpent-3-en-2-one (6), as well as the corresponding benzotriazol-2-yl derivatives (7) and (8), in inert solvents, while in methanol the methoxy-hydroperoxides (9) and (10) are obtained. The mechanism of the reaction as well as the effects of steric hindrance (substituting a t-butyl for a methyl group in the starting material), of the temperature, and of trapping agents, have been investigated. A comparison with other oxidative methods shows that under the conditions in which singlet oxygen is liberated from diphenylfuran endoperoxide, the ketones (6) and (8) are formed together with the nitroso-derivative (16), while peracid oxidation affords exclusively product (16).

Photocleavage of the acetate of a hydroxyphenyl benzotriazole UV absorber: The search for a photo-Fries rearrangement product

Abstract: The acetate ester of 2-(2H-benzotriazol-2-yl)-4-methyl phenol [Tinuvin P] upon irradiation, either in methylene chloride solution or in poly(methyl methacrylate) films, undergoes a photocleavage reaction to regenerate Tinuvin P. No photo-Fries rearrangement product can be detected.

Corrosion preventive method of metal of cooling water system

Abstract: PURPOSE:To prevent effectively corrosion of various metals of a cooling water system by adding a corrosion preventive agent contg. additive salts of benzotriazole and tert-butyl benzoic acid and amine, nitrite, benzoate, etc. in cooling water for an internal combustion engine. CONSTITUTION:A corrosion preventive agent contg. an additive salt (BT.SA) of benzotriazole and water soluble amine, an additive salt (TBA.SA) of tert- butyl benzoic acid and water soluble amine, nitrite and benzoate is added to cooling water for an internal combustion engine, by which corrosion prevention of almost all of many and diversified kinds of metals such as copper, brass, aluminum alloy, solder, steel, cast iron, etc. constituting the cooling water system is effected. The preferred amts. of said corrosion preventive agent components to be added to the cooling water are about 0.005-2.5%, more preferably about 0.05-1.0% BT.SA, about 0.01-2.5%, more preferably about 0.1-1.0% TBA.SA, about 0.03-1.5% nitrite and about 0.001-2.0% benzoate.

Benzotriazole compound and its homopolymer or copolymer

Abstract: NEW MATERIAL:The compound of formula (A is H or acetyl; R is vinyl, ethyl, or haloethyl; R is 1-4C alkyl; n is 1 or 2). EXAMPLE:2-( 2-Hydroxy-5-methylphenyl )-5-vinyl-2H-benzotriazole. USE:A raw material of a homopolymer or copolymer useful as an ultraviolet absorber. PROCESS:Ethyl-o-nitriloaniline is diazotized with a nitrous acid salt, and condensed with an alkylphenol to obtain an azo compound, which is reduced to (2- hydroxyphenyl)-ethyl-2H-benzotriazole. The product can be converted to the compound of formula wherein R is vinyl e.g., by protecting the hydroxyl group by acetylation, brominating the ethyl group with N-bromosuccinimide, and then dehydrobrominating the brominated product.