Abstract: A process is provided wherein acetaldehyde and methanol are obtained from reaction mixtures which result from the homologization of methanol and which in addition to acetaldehyde essentially contain acetaldehyde dimethylacetal, methanol, methyl acetate and water.

Abstract: Pigment pastes, comprising water, an organic solvent, a copolymer of one or more water-immiscible, or only partially water-miscible, copolymerizable .alpha.,.beta.-olefinically unsaturated compounds and one or more water-soluble copolymerizable N-vinyl compounds, and a finely divided pigment and/or filler dispersed in the mixture of water, solvent and copolymer, are used for pigmenting aqueous solutions or dispersions of surface-coating binders, as toner pastes for water-based finishes, and for pigmenting and toning anodic or cathodic electrocoating finishes.

Abstract: 6-Substituted 11-alkylene-morphanthridines, also referred to as 11-alkylene-dibenzo[b,e]-azepines, their pure cis- and trans-isomers, processes for their preparation, and therapeutic agents containing these compounds, which may be used as drugs, in particular neuroleptics, sedatives, hypnotics, analgesics, antidepressants or agents for treating Parkinson's syndrome.

Abstract: Thermosplastic molding materials which contain styrene polymers and polyphenylene ethers whose phenolic hydroxyl groups have been reacted with reactive copolymers.

Abstract: A process for the preparation of etherified or non-etherified aminoplast resins, wherein an aminotriazine of the general formula (I) ##STR1## where X is hydrogen, alkyl, phenyl, alkylphenyl or --NH.sub.2, is reacted with a .beta.-hydroxyaldehyde of the general formula (II) ##STR2## where R', R" and R'" are identical or different and each is hydrogen or alkyl, or R" and R'", together with the .alpha.-carbon atom, are a cyclopentane or cyclohexane ring, and R" and/or R'" can be hydroxyalkyl and R" can be phenyl, the reaction being carried out in the presence of not less than one alcohol and an acid catalyst for the preparation of etherified aminoplast resins and in the presence or absence of an acid catalyst for the preparation of non-etherified aminoplast resins. The aminoplast resins prepared according to the invention can be used as surface-coatings raw materials.

Abstract: Navy dye mixtures which contain, as essential components, compounds of the general formula I ##STR1## where X is chlorine or bromine, Y is methoxy or ethoxy, and R is ##STR2## NHC.sub.2 H.sub.4 CN, NHCH.sub.2 CH.dbd.CH.sub.2 or N(C.sub.2 H.sub.4 OCOCH.sub.3).sub.2, and wherein the dye of the above formula where X is Br, Y is OCH.sub.3 or OC.sub.2 H.sub.5 and R is N(C.sub.2 H.sub.4 OCOCH.sub.3).sub.2 is present in an amount of 25-45%, based on the total weight of the mixture, are very useful for dyeing synthetic polyesters.

Abstract: An iodophor containing a polyoxybutylene-polyoxy-ethylene nonionic block copolymer has unexpectedly high foam.

Abstract: A process for removing nitrous oxide from exit gases which contain this compound and have been obtained in the preparation of hydroxylammonium salts by catalytic reduction of nitric oxide with hydrogen in an aqueous solution of a mineral acid, in the presence of a suspended noble metal catalyst, wherein the exit gases are washed with water.

Abstract: In the synthesis of melamine by conversion of urea in a fluidized catalyst bed, the melamine quality is improved by reactivating the catalyst by treating it, in the fluidized bed, with gases containing steam, in the absence of oxygen, at from 250.degree. to 450.degree. C.

Abstract: A photosensitive multi-layer material comprising a base and a photosensitive layer which has a polyamide binder and is soluble or dispersible in an alcoholic solvent contains two layers between the base and the photosensitive layer, namely (a) an adhesion-promoting layer, adjacent to the base, which is derived from a polyurethane binder, prepared by reacting a hydroxyl-containing epoxy resin and a polyisocyanate, and a pigment combination in which a white zinc sulfide pigment is the essential constituent, and (b) an adhesive layer, adjacent to the photosensitive layer, which consists of a baked mixture of an alcohol-soluble copolyamide and a melamine-formaldehyde resin.

Abstract: 1,2-Oxazolyl alkyl carbamates of the formula ##STR1## where R.sup.1 denotes alkyl of a maximum of 6 carbon atoms, alkoxyalkyl of a maximum of 3 carbon atoms, or alkoxycarbonyl of a maximum of 5 carbon atoms, R.sup.2 denotes hydrogen, or unsubstituted or halogen-substituted alkyl of a maximum of 3 carbon atoms, R.sup.3 denotes hydrogen, or alkyl of a maximum of 3 carbon atoms, and R.sup.4 denotes alkyl or cycloalkyl of a maximum of 6 carbon atoms, substituted or unsubstituted phenyl, or naphthyl, methylenedioxyphenyl, ethylenedioxyphenyl, benzofuranyl, dihydrobenzofuranyl or indanyl; the manufacture of such compounds, their use for combating unwanted plant growth, and herbicides containing these compounds.

Abstract: Halogen-containing s-triazine compounds of the formula I ##STR1## where R is OH, R.sup.1, R.sup.2 or R.sup.3, R.sup.1 is ##STR2## where R.sup.4 is lower alkyl or lower haloalkyl, X is bromine or chlorine, k and n are 0 or integers from 1 to 5 and k+n is not more than 5, R.sup.2 is ##STR3## where R.sup.5 is lower alkyl or lower haloalkyl, Z is bromine or chlorine, s and p are 0 or integers from 1 to 4 and s+p is not more than 4, and R.sup.3 is ##STR4## where R, R.sup.5, Z, s and p have the above meanings. The compounds claimed are prepared by reacting cyanuric chloride with a phenol of the formula III ##STR5## and a benzene derivative of the formula IV ##STR6## in the presence of a base. The products thereby obtained are used for flameproofing thermoplastics, in particular styrene/acrylonitrile copolymers made impact-resistant with rubber (ABS resins).

Abstract: Hydrogenation catalysts, which have a specific surface area of from 50 to 150 square meters per gram, solely or partially contain crystals having a spinel structure and copper in the form of copper oxide, and have been obtained by precipitating copper and aluminum in a ratio of from 0.25 to 3 atoms of copper per atom of aluminum from their compounds in the presence of a carbonate at a pH of from 4.5 to 9 and calcining the resulting precipitate at from 300.degree. to 800.degree. C., for the catalytic preparation of propanediols by hydrogenating hydroxypropionaldehydes at not more than 300 bar pressure and from 50.degree. to 200.degree. C., and processes for the preparation of propanediols by the use of such catalysts.The propanediols obtainable by the process of the invention, in particular 2,2-dimethylpropane-1,3-diol, are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example corresponding polyesters.

Abstract: Hydrogenation catalysts, which have a specific surface area of from 50 to 150 square meters per gram, solely or partially contain crystals having a spinel structure and copper in the form of copper oxide, and have been obtained by precipitating copper and aluminum in a ratio of from 0.25 to 3 atoms of copper per atom of aluminum from their compounds in the presence of a carbonate at a pH of from 4.5 to 9 and calcining the resulting precipitate at from 300.degree. to 800.degree. C., for the catalytic preparation of propanediols by hydrogenating hydroxypropionaldehydes at not more than 300 bar pressure and from 50.degree. to 200.degree. C., and processes for the preparation of propanediols by the use of such catalysts.The propanediols obtainable by the process of the invention, in particular 2,2-dimethylpropane-1,3-diol, are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example corresponding polyesters.

Abstract: Polyacetal molding materials which contain, as a stabilizer, from 0.1 to 10% by weight of a melamine resin, the latter being a melamine-formaldehyde condensate, having a mean degree of polymerization of from 1.2 to 6.0 and a melamine:formaldehyde ratio of from 1:2 to 1:5.5, which has been partially etherified with a C.sub.1 -C.sub.4 -alkanol so that the ratio melamine:ether radicals is from 1:1.5 to 1:5.0 and the ratio melamine:free methylol groups is from 1:0.5 to 1:3. The molding materials can be converted to moldings which can be used industrially at elevated ambient temperatures.

Abstract: Polyisocyanurate polymers containing pendant urea groups are prepared by polymerization of polyisocyanates in organic solvents employing appropriate trimerization catalysts and then end-capping the polyisocyanurate polymer with ammonia or ammonium hydroxide. These end-capped polyisocyanurate polymers which contain pendant urea groups are dispersed in polyols to yield fine particulate dispersions. Cellular and non-cellular urethane products prepared using these dispersions displayed improved physical properties.

Abstract: N-Alkylpiperidines or N-alkylpyrrolidines are obtained by hydrogenating a corresponding N-alkyldicarboxylic acid imide over a fixed catalyst by first working to only partial conversion, for example of about 50%, and distilling off the required product together with water from the partially converted mixture, where appropriate with recycling of the unconverted remainder.

Abstract: 2-Carbamic acid esters of 2,4-diamino-5-(3',4',5'-trimethoxybenzyl)-pyrimidine (trimethoprim), a process for their preparation, and drugs containing these compounds, which, as pro-drugs of trimethoprim, have valuable antibacterial properties and potentiate the antibacterial action of sulfonamides.

Abstract: Compounds of the formula ##STR1## where Ar, R.sup.1, R.sup.2 and X have the meanings given in the claims, their preparation and their use as plant growth regulators.

Abstract: A photopolymerizable recording composition which comprises a mixture, containing a photoinitiator, of (a) a photopolymerizable olefinically unsaturated monomer and (b) an organic polymeric binder, wherein the photoinitiator is an acylphosphine oxide compound of the formula R.sup.1 R.sup.2 PO--CO--R.sup.3, where R.sup.1 and R.sup.2 are certain organic radicals and R.sup.3 is tert.-alkyl or a cyclic radical with two substituents in the ortho-position to the carbonyl group. The recording compositions have a high reactivity when irradiated with UV light and are used in particular for the preparation of printing plates, relief plates and photo-resists.