Abstract: Aqueous storage-stable, non-sedimenting photoinitiator suspensions comprising (a) a mono- or bis-acylphosphine oxide of formula (I), wherein R1 is C1-C20alkyl; C2-C20alkyl interrupted by one or more O atoms; C1-C12alkoxy; phenyl-C1-C4alkyl; or phenyl that is unsubstituted or substituted by C1C20alkyl, C1-C12alkoxy, halogen, cyclopentyl, cyclohexyl, C2-C12alkenyl, C2-C18alkyl interrupted by one or more O atoms, and/or by phenyl-C1-C4alkyl; or R1 is biphenylyl; R2 is an aromatic radical or has one of the meanings give for R1; R3 and R4 are each independently of the other C1-C12alkyl, C1-C12alkoxy or halogen; and R5 is hydrogen, C1-C12alkyl, C1-C12alkoxy or halogen; (b) a dispersant; and (c) water are suitable especially in the photopolymerisation of aqueous formulations comprising ethylenically unsaturated monomers.

Abstract: 2-(2,4-Dihydroxyphenyl)-4,6-bis(2,4-dimethylphenyl)-s-triazine is prepared by reacting cyanuric chloride with m-xylene at a temperature of 0.degree.-110.degree. C. in the presence of a Lewis acid and at least one inert chlorinated aromatic solvent to give the intermediate 2-chloro-4,6-bis(2,4-dimethylphenyl)-s-triazine. This intermediate, without being isolated, is then reacted with resorcinol to give the final desired product 2-(2,4-dihydroxyphenyl)-4,6-bis(2,4-dimethylphenyl)-s-triazine in good yield.

Abstract: The invention relates to a process for the preparation of polyalkylated aromatic carboxylic acids of formula I ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each independently of one another hydrogen, C.sub.1 -C.sub.20 alkyl, halogen or C.sub.5 -C.sub.8 cycloalkyl, with the proviso that at least two of the substituents R.sub.1, R.sub.2, R.sub.3, R.sub.4 or R.sub.5 are alkyl and/or cycloalkyl, by reacting corresponding aromatic hydrocarbons with carbon dioxide, which reaction is carried out observing special ratios of temperature and pressure. The invention furthermore relates to a one-pot process for the preparation of the corresponding acyl halides.

Abstract: Highly concentrated flowable dispersions of corrosion inhibitors can be prepared by stirring a filter cake of the corrosion inhibitor with a dispersant and a thickener. These dispersions are storage stable.

Abstract: A process for the preparation of compounds of the formula I is described ##STR1## in which R.sup.1 and R.sup.2 independently of one another are C.sub.1 -C.sub.7 alkyl; and R.sup.3 is hydrogen or halogen, by reaction of a diazonium salt of a 2-nitroaniline in acid aqueous solution with a phenol dispersed in water.The process comprises employing as the dispersant a C.sub.8 -C.sub.20 alkanesulfonic acid or a corresponding alkanesulfonate or a mixture of sulfonic acid and sulfonate together with a polyvinyl alcohol.The resulting compounds of the formula I can advantageously be reacted further to give benzotriazoles of the formula V ##STR2## which are used as light stabilizers.

Abstract: Storage-stable, non-sedimenting emulsions comprisinga) 10 to 80% by weight, based on the emulsion, of one or more anti-oxidants,b) 0.25 to 10% by weight, based on the emulsion, of a surfactant in the form of a fatty acid salt of formula R-COOY, wherein R is straight chain or branched C.sub.3 -C.sub.18 alkyl or straight chain or branched C.sub.3 -C.sub.18 -alkenyl, or is phenyl(C.sub.3 -C.sub.18)alkyl, and Y is an alkali metal, which salt is prepared in situ from the fatty acid,c) 0.25 to 10% by weight, based on the emulsion, of a co-surfactant in the form of an alcohol of the general formula R'--OH, wherein R' is straight chain or branched C.sub.4 -C.sub.19 alkyl or straight chain or branched C.sub.4 -C.sub.19 alkenyl, or is phenyl(C.sub.4 -C.sub.19)alkyl, andd) water to make up 100%.The emulsions are used for stabilizing emulsion-polymerized polymers and copolymers such as ABS.

Abstract: Process for the methylation of compounds at least one group of the formula (I) ##STR1## by means of a mixture of formaldehyde and formic acid in a reaction medium consisting of an aromatic hydrocarbon solvent.

Abstract: Storage-stable, non-sedimenting emulsions containinga) 10 to 40% by weight, based on the emulsion, of (A) phenolic antioxidants and antioxidants from the series comprising (B) thiodipropionic acid esters or/and (C) organic phosphites,b) 0.25 to 10% by weight, based on the emulsion, of a surfactant of the formula R-COOY, in which R is alkyl having 3 to 18 atoms, alkenyl having 3 to 18 C atoms or phenyl-C.sub.3 -C.sub.18 alkyl and Y is an alkali metal,0.25 to 10% by weight, based on the emulsion, of an alcohol of the formula R'-OH, in which R' is alkyl having 4 to 19 C atoms, alkenyl having 4 to 19 C atoms or phenyl-C.sub.4 C.sub.19 alkyl, andwater as the remainder to make 100% by weight.The emulsions are employed in particular for stabilizing emulsion-polymerized polymers and copolymers, for example ABS.

Abstract: Storage-stable, non-sedimenting emulsions comprisinga) 10 to 80% by weight, based on the emulsion, of one or more antioxidants,b) 0.25 to 10% by weight, based on the emulsion, of a surfactant in the form of a fatty acid salt of formula R-COOY, wherein R is straight chain or branched C.sub.3 -C.sub.18 alkyl or straight chain or branched C.sub.3 -C.sub.18 -alkenyl, or is phenyl(C.sub.3 -C.sub.18)alkyl, and Y is an alkali metal, which salt is prepared in situ from the fatty acid,c) 0.25 to 10% by weight, based on the emulsion, of a co-surfactant in the form of an alcohol of the general formula R'--OH, wherein R' is straight chain or branched C.sub.4 -C.sub.19 alkyl or straight chain or branched C.sub.4 -C.sub.19 alkenyl, or is phenyl(C.sub.4 -C.sub.19)alkyl, andd) water to make up 100%.The emulsion are used for stabilizing emulsion-polymerized polymers and copolymers such as ABS.