Showing papers on "Benzotriazole published in 1979"

Protection of Copper by Pretreatment with Benzotriazole

Abstract: Corrosion protection afforded by pretreating copper in aqueous benzotriazole solutions at temperatures ranging from 25 to 100 C were evaluated. Electrochemical characteristics of pretreated copper mirrors were monitored using rapid polarization techniques. Thickness of surface films were analyzed by infrared multiple reflectance spectroscopy. Topography of surface films prior to and subsequent to test exposures was examined by scanning electron microscopy. Defects in protective films on pretreated copper mirrors were detected by immersion in silver nitrate solutions. The resulting silver “decorations” identified both the location and density of active corrosion sites in the multilayer protective films. Exchange current densities, corrosion current densities, corrosion rates determined by chemical analyses, electrical double layer capacities, and the densities of active corrosion sites all showed similar dependencies on pretreatment temperatures. All techniques indicated that the protectiveness of...

Silver halide color photographic material

Abstract: PURPOSE:To reduce light stain generation and light stain density, by adding a specified ultraviolet absorbent dissolved in a specified branched alkyl phosphate to an interlayer not containing a dye forming agent CONSTITUTION:A hydrophobic 2-(2'-hydroxyphenyl)benzotriazole compound of formula I (R1-R5 are each H, halogen, nitro, OH, alkyl, alkenyl, aryl, alkoxy, acyloxy, aryloxy, alkylthio, arylthio, mono- or di-alkyamino, acylamino, or an O or N containing 5- or 6-membered heterocyclic group, and R4 and R5 may close a ring and form a 5- or 6-membered aromatic ring), preferably of formula II is dissolved in a phosphate of formula III in which A1-A3 are each 3 or more C branched alkyl group and the total sum of carbon number is 24-40 This solution is dispersed in a gelatin-containing hydrophilic colloid solution for forming an interlayer not containing a dye forming agent

2-[2-Hydroxy-3,5-di-tert-octylphenyl]-2H-benzotriazole stabilized compositions

Abstract: 2-[2-Hydroxy-3,5-di-tert-octylphenyl]-2H-benzotriazole exhibits outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the high temperature processing of stabilized compositions.

Antifreeze composition containing a corrosion inhibitor combination

Abstract: The invention is a synergistic combination of inhibitors which effectively prevents corrosion in automotive cooling systems containing antifreeze solution based on water-soluble alcohols. The combination includes sodium tetraborate, sodium benzoate, sodium metaborate, sodium metasilicate and tolyltriazole or benzotriazole.

Effect of Thioureas and Triazoles on Hydrogen Penetration Rates in Iron

Abstract: The rates of hydrogen penetration in annealed iron in 1N H2SO4 containing various thiourea and triazole compounds have been measured by the electrochemical technique. Corrosion rates were measured by the polarization method. The organic compounds selected for this study are thiourea, phenylthiourea, tolylthiourea, triazole, benzotriazole, and tolyltriazole. At lower organic concentrations, thiourea, phenylthiourea, tolylthiourea, and triazole were corrosion accelerators, while at all concentrations studied, benzotriazole and tolyltriazole were corrosion inhibitors. All three thiourea compounds accelerated the hydrogen penetration rate in iron, while the three triazole compounds were hydrogen penetration inhibitors. Thiourea accelerated and tolyltriazole inhibited hydrogen penetration to the greatest extent. Correlations between the open circuit hydrogen penetration rate and the corrosion rate have been obtained for the two groups of organic compounds. For the thiourea compounds, open circuit hydr...

Corrosion Pretreatments for Copper-Zinc Alloys

Abstract: Combinations of four different types of zinc complexing agents with benzotriazole (BTA), an efficient complexant and corrosion inhibitor for copper, were tested as pretreatment inhibitors ...

Lubricant compositions containing antioxidant mixtures comprising substituted thiazoles and substituted thiadiazole compounds

Abstract: Lubricant compositions containing oleaginous materials and, in an amount sufficient to impart oxidation stability and corrosion resistance thereto, an adduct of a benzotriazole compound and an alkyl vinyl ether or a vinyl ester of a carboxylic acid in combination with an alkyl dimercapto thiadiazole.

Photographic coating fluid

Abstract: PURPOSE:To obtain a coating fluid with superior coatability and superior aging stability for forming an ultraviolet absorbing filter by dispersing a triazole type ultraviolet absorber with a specified surfactant. CONSTITUTION:A triazole type ultraviolet absorber represented by general formula I (where each of R, R1 and R2 is H, halogen, nitro, 1-18C alkyl alkoxy, aryl or allyloxy), e.g., 2-(2'-hydroxy-5'-methylphenyl)benzotriazole is dissolved in a solvent such as dibutyl phthalate, and to this soln. is added a nonfluorinated anionic surfactant such as sodium alkylbenzenesulfonate. The surfactant-added soln. is then emulsification-dispersed in an aqueous gelatin soln. with a colloid mill, and an amphoteric betaine type fluorinated surface active compound such as the compound of formula II is blended into the dispersion in an amount of 1-50wt% to the amount of the surfactant.

Entzündungshemmende Wirkstoffe, 4. Mitt. 1‐Aroyl‐ und 1‐Aralkylbenzotriazole

Abstract: Aus der Acylierung von Benzotriazol (1a), 5,6-Dichlorbenzotriazol (1b) und 5,6-Dimethylbenzotriazol (1c) mit den Carbonsaurechloriden 2a und 2c-e resultieren die 1-Aroylbenzotriazole 3a und 3c-f. Die Durchfuhrbarkeit analoger Aralkylierungen geht aus der zu 1-(4-Chlorbenzyl)benzotriazol (3b) fuhrenden Umsetzung von 1a mit 4-Chlorbenzylchlorid (2b) hervor. Besonders 3c besitzt einen auffallenden entzundungshemmenden Effekt. Antiinflammatory Agents, IV: 1-Aroyl- and 1-Aralkyl-benzotriazoles Acylation of benzotriazole (1a), 5,6-dichlorobenzotriazole (1b) and 5,6-dimethylbenzotriazole (1c) by the carboxylic chlorides 2a and 2c-e leads to the 1-aroylbenzotriazoles 3a and 3c-f. The feasibility of analogous aralkylations is shown by the interaction of 1a with 4-chlorobenzyl chloride (2b) yielding 1-(4-chlorobenzyl)benzotriazole (3b). Compound 3c in particular is capable of exercising antiinflammatory activity.

Blocked benzotriazole compounds as development restrainer precursors

Abstract: Benzotriazole compounds employed as development restrainer precursors are described having on one nitrogen atom an alkali-hydrolyzable, N,N-disubstituted carbamoyl group. The compounds may have the following formula: ##STR1## wherein: R 1 and R 2 each represent a substituted or unsubstituted alicyclic, aliphatic, aromatic or heterocyclic moiety, or may be taken together with the nitrogen to which they are attached to form a heterocyclic ring; and R 3 , R 4 , R 5 and R 6 each represent hydrogen, nitro, lower alkyl, halogen, carbamoyl, sulfamoyl, RCONH-- or RSO 2 NH--, wherein R is lower alkyl or aryl.

Inhibition of the Corrosion of Grey Cast Iron in Ethanediol/Water Solutions by Benzoate/Benzotriazole Mixture: A Synergistic Effect

Abstract: The synergistic effects of sodium benzoate and benzotriazole in inhibiting the corrosion of grey cast iron in 50% ethanediol/water solutions are described. Good inhibition can be obtained in the presence of both inhibitors at concentrations of eachwhich are ineffective when either inhibitor is present alone. The results also showthat the inhibitors are effective on both ‘as-cast’ and machined surfaces. Limited information is presented to demonstrate a similar synergistic effect for the inhibition of corrosion of an aluminium alloy. Some possible adsorption mechanisms to explain these effects are considered briefly.

An adduct of a benzotriazole and lubricant compositions containing such adduct

Abstract: Lubricant compositions containing oleaginous materials and, in amounts sufficient to impart oxidation protection, corrosion resistance and antiwear properties thereto, an adduct of a benzotriazole compound and alkyl vinyl ether or a vinyl ester of a carboxylic acid.

Preventing method for corrosion of aluminum, copper, or copper alloy

Abstract: PURPOSE: To improve the rust-preventive property of aluminum, copper, or copper alloy in water, by the addition of a specific azole compounds and polymaleic anhydride of specific molecular weight CONSTITUTION: As the azole compound is used triazoles eg benzotriazole etc, pyrazoles eg 35-dimethylpyrazole etc, imidazoles eg imidazole etc, isoxazoles eg 3-mercaptoisoxazole etc, isothiazoles eg 3-mercaptobenzothiazole etc, thiazoles eg thiazole etc, or oxazoles, these compounds are added preferably about 01W5,000mg/l Polymaleic anhydride is shown by formula, and is added preferably in a ratio about 05W500mg/l The ratio of addition of polymaleic anhydride to azoles is about 50:1W1:10 Polyphosphate, tartaric acid may be used simultaneously COPYRIGHT: (C)1981,JPO&Japio

Peroxygen containing compositions and bleaching process

Abstract: PEROXYGEN CONTAINING COMPOSITIONS AND BLEACHING PROCESS A process of removing soil and/or stains from fabrics by immersing the fabrics in a peroxygen bleach bath containing as a peroxygen activator an N-sulfonyl-azole of the formula where Z represents the number of carbon and nitrogen atoms necessary to complete a heterocyclic ring selected from the class consisting of pyrazole, pyrrole, triazole, and benzotriazole wherein said ring can be substituted with phenyl, alkyl of 1 to 10 carbon atoms, halogen, amino, cyano, nitro, alkoxy of 1 to 10 carbon atoms and R is an alkyl radical of 1 to 10 carbon atoms. The peroxygen containing compositions contain a peroxygen compound, an N-sulfonylazole compound and may optionally contain one or mmore of a detergent agent, water, a buffering agent or a detergency builder.

Polyolefins stabilized against light-induced degradation and a light stabilizer composition therefor

Abstract: Polyolefins are stabilized against light-induced degradation by incorporating a combination of n-hexadecyl 3,5-di-t. butyl-4-hydroxybenzoate and a dialkyl pentaery-thrityl dis- phosphite. Further improvement is obtained by incorporating a benzotriazole or benzophenone.

Rust preventive composite

Abstract: PURPOSE:To obtain a rust preventive composite that contains not less than one or two kinds of compound in a group of benzotriazole, etc., and a special anion surface active agent and has the remakable rust proof effect to iron, nonferrous metal and, especially, copper. CONSTITUTION:This is a rust preventive composite that contains not less than one or two kinds of compound selected from a group of benzotriazole, benzothiazole, etc., for example and an anion surface active agent having an amide radical and carbonyl radical in one molecule, and the above-mentioned surface active agent is a compound expressed by formulas (I)-(III); and the rust proof effect can specially be improved by using a compound expressed by formula (IV) [where R2 is a 7-17C alkyl radical or alkenyl radical, R1 H or CH3, and M alkali metal]. In formulas (I)-(IV), M is Na. This composite has the remarkable anti-discoloring effect, i.e. rust proof effect to iron, nonferrous metal and, especially, copper as compared with the conventional composite.

Stabilizer composition for resin

Abstract: PURPOSE: Title composition which improves the light stability, heat stability, etc., of a polyphenylene ether type graft copolymer resin, including an organic phosphite compound and a hydroxybenzotriazole compound or a hidroxybenzophenone compound. CONSTITUTION: A polyhenylene ether type graft copolymer resin represented by the formula, wherein R 1 and R 2 each is H, halogen, aryl, etc., and n is an integer corresponding to a polymerization degree, is stabilized by adding thereto (a) at least one organic phosphite compound, such as trioctyl phosphite or triphenyl phosphite, and (b) at least one compound selected from the group consisting of a hydroxybenzotriazole such as 2-(2'-hydroxy-5'-methylphenyl)benzotriazole and a hydroxybenzophenone such as 2-hydroxy-4-methoxybenzophenone. Said components (a) and (b) each is used in an amount of about 0.1W5wt%. COPYRIGHT: (C)1980,JPO&Japio

Image electrotheromoorecording method

Abstract: PURPOSE:To reduce electrical resistance of a conductive composition layer and to form an image of high quality, by heating a recording material having a conductive composition layer containing benzotriazoles, a reducible metal compound, and the like before conducting current for imaging. CONSTITUTION:The electrothermo-recording material is prepared by forming on a conductive substrate a conductive composition layer consisting of a binder (a), such as gelatin or cellulose nitrate; a compound (b) of benzotriazoles; a reducible metal compound (c), such as benzotriazole silver or silver caprate; an organic compound (d) capable of reducing compund (c), such as L-ascorbic acid; and the like. After this recording material has been heated to about 80-250 deg.C, preferably 100- 160 deg.C for about 0.1-120 seconds, preferably 0.3-60 seconds prior to conduction of current, current is conducted by a normal method to form an image and develop it with heating. This heating prior to conduction mentioned above makes electrical resistance of the recording material about 10 ohm/cm and an image of high S/M ratio and high quality can be obtained.

Passivation Treatment of Al-Brass Tubes for the Prevention of Atmospheric Corrosion during Storage and Transport

Abstract: Electrochemical measurements and exposure in a marine—rural environment have indicated that a passivation treatment of Al-brass tubes in NaCl solution containing benzotriazole should be a particular suitable method of minimising corrosion of the tubes in the atmosphere.

Anticorrosive for copper

Abstract: PURPOSE:To render Cu a higher anticorrosive capability by using small amounts of an azole exhibiting a synergistic anticorrosive effect with a specific triazine by adding an anticorrosive composed of an azole and a triazine to an aqueous system in contact with Cu. CONSTITUTION:A 1 : 1 to 20 (preferably 1 : 5 to 15) mixture of an azole, e.g., benzotriazole, imidazole, or their derivatives, and a triazine of the formula (where R1 is -Cl or -SCH3 and R2 and R3 are hydrogen atoms or 1 to 5 carbon alkyl amino groups), especially the derivative of triazine, having NH2 groups, is added to an aqueous system(ph 6.8 to 9) in contact with Cu. In this case, the preferred amount of the former additive is 0.1 to 1.5 ppm) preferably 0.4 to 0.8 ppm), and also that of the latter one is 0.1 to 30 ppm (preferably 2 to 12 ppm). The anticorrosive can be used for all systems having problems with the corrosion of Cu in addition to aqueous systems in contact with Cu, e.g., boilers, cooling water systems, radiator, etc.

Action of chlorine on a 2-substituted benzotriazole

Abstract: Chlorine gas reacts with 2-(2-acetoxy-5-methylphenyl)benzotriazole in the presence of anhydrous sodium carbonate to form novel addition derivatives of the benzotriazol-2-yl nucleus, namely configurational isomers of 2-(2-acetoxy-5-methylphenyl)-4,5,6,7-tetrachloro-4,5,6,7-tetrahydrobenzotriazole and 2-(2-acetoxy-5-chloromethylphenyl)-4,5,6,7-tetrachloro-4,5,6,7-tetrahydrobenzotriazole.