Abstract: Aminopyrimidines of the formula (I) ##STR1## in which X and Y are in each case oxygen or sulfur andR.sup.1, R.sup.2 are independently of one another (C.sub.1 -C.sub.4)alkyl, (C.sub.1 -C.sub.4)alkoxy-(C.sub.1 -C.sub.2)alkyl or halo(C.sub.1 -C.sub.4)alkyl,are intermediates for the preparation of herbicides from the sulfonylurea group. According to the invention, compounds of the formula I can be prepared in a one-step process without pH control, which comprises the reaction of a propanediimidate of the formulaR.sup.1 X--C(.dbd.NH)--CH.sub.2 --C(.dbd.NH)--YR.sup.2or its salt with an alkali metal or alkaline earth metal salt of the cyanamide, in which a solution of the compounds in an alcohol of the formula R.sup.4 --OH, in which R.sup.4 is (C.sub.1 -C.sub.6)alkyl, or, simultaneously, separate solutions of the compounds in each case in an alcohol R.sup.4 --OH are added to an inert organic solvent which is higher-boiling in comparison to the alcohol at temperatures above 100.degree. C.

Abstract: Carrier resin for pigment pastes, and its preparation and useThe invention relates to paste resins based on epoxide compounds, containing (a) specific quaternary ammonium groups, (b) OH groups and (c) isocyanate radicals which are bonded to the epoxy compound and of which at least 10 mol % are derived from a long-chain, monofunctional isocyanate having at least 8 carbon atoms, the average molecular weight (Mn) of these paste resins being 500 to 10,000. The invention furthermore relates to the preparation of these paste resins, to their use for pigment pastes and to these pigment pastes. Water-dilutable paints, in particular electrocoating paints which contain the pigment pastes according to the invention, give trouble-free surfaces and comparable film thicknesses, even on different substrates.

Abstract: Compounds of the formula I ##STR1## in which the carboxyl group on carbon atom 3 is orientated in the endo-position relative to the bicyclic ring system of cis-configuration, and in which R.sup.1 denotes hydrogen, allyl, vinyl or a side-chain of a naturally occurring .alpha.-aminoacid, which may be protected, R.sup.2 denotes hydrogen, alkyl, alkenyl or aralkyl, Y denotes hydrogen or hydroxyl and 2 denotes hydrogen, or Y and Z together denote oxygen, and X denotes alkyl, alkenyl or cycloalkyl, or aryl which is optionally mono-, di- or tri-substituted by alkyl, alkoxy, hydroxyl, halogen, nitro, amino, alkylamino, dialkylamino or methylenedioxy, or denotes indol-3-yl, a process for their preparation, agents containing these compounds and their use.

Abstract: Polymers with polyvinyl acetal groups, which contain acetalized polyvinyl alcohol groups on polyurethane grafting substrates and which are prepared from graft polymers, containing vinyl alcohol groups on polyurethane grafting substrates, by reaction with aldehydes according to known methods. The aldehydes used can be any known aldehydes capable of acetalization reactions.The polyurethane grafting substrates contain at least 2 urethane groups in the molecule and units from diisocyanates and diols, and polymer radicals of units of vinyl carboxylates having 3 to 20 carbon atoms and/or hydrolysis products thereof and, if appropriate, further monomer units are grafted onto the polyurethane grafting subtrates. The proportion of vinyl alcohol units in the hydrolyzed or partially hydrolyzed graft polymers before the acetalization is >10% by weight.In the acetalized polymer, the content of residual unacetalized vinyl alcohol units is >7.

Abstract: Compounds of the formula I ##STR1## in which the carboxyl group on carbon atom 3 is orientated in the endo-position relative to the bicyclic ring system of cis-configuration, and in which R.sup.1 denotes hydrogen, allyl, vinyl or a side-chain of a naturally occurring .alpha.-aminoacid, which may be protected, R.sup.2 denotes hydrogen, alkyl, alkenyl or aralkyl, Y denotes hydrogen or hydroxyl and Z denotes hydrogen, or Y and Z together denote oxygen, and X denotes alkyl, alkenyl or cycloalkyl, or aryl which is optionally mono-, di- or tri-substituted by alkyl, alkoxy, hydroxyl, halogen, nitro, amino, alkylamino, dialkylamino or methylenedioxy, or denotes indol-3-yl, a process for their preparation, agents containing these compounds and their use.

Abstract: Use of fine-particled biocidal aqueous cationic dispersions of polymers as biocidal treatment agents for substrates at risk from microbes, preferably for fungicidal, bactericidal and/or algicidal treatments. The dispersions of polymers used are biocidal cationic dispersions of polymers which can be obtained from suitable monomers by emulsion polymerization and which contain biocidal cationically surfactant quaternary organic ammonium compounds, preferably tetra-substituted ammonium compounds of the formula (I) and/or alkyl- or alkenylpyridinium compounds of the formula (II), in particular in an amount of 0.1 to 20% by weight, based on the disperse polymer. The average particle diameter of the polymer particles in the biocidal cationic dispersions of polymers is preferably 0.02 to 0.5 .mu.m at a cationic activity of 1.5 to 600 .mu.mol per g of solid, measured at pH 7, and the solids content of the dispersions is preferably 3 to 40% by weight.

Abstract: Use of a water-dispersible polymer as binder in an aqueous filler composition which may or may not comprise, in addition to other polymeric binders, crosslinking agents and the customary additives, wherein the water-dispersible polymer is a polyurethane resin which contains building blocks derived from(A) polyisocyanates,(B) polyols having an average molecular weight M.sub.n of at least 400,(C) low-molecular polyols if desired and,(D) compounds containing at least two groups reactive toward isocyanate groups and at least one group capable of forming anions, and(E) compounds which are monofunctional or contain active hydrogen of variable reactivity, these building blocks being always positioned at the chain end fo the polyurethane resin, and optionally(F) compounds which are other than (B), (C), (D) and (E) and contain at least two groups reactive toward NCO groups.

Abstract: Dispersion polymers based on ethylenically unsaturated monomers, the polymers containing at least 1% by weight of specific monomer units of ethylenically unsaturated urea derivatives (see formula I), process for their preparation particularly by free-radical initiated emulsion, suspension or bead polymerization or copolymerization and their use as coating compositions, preferably in the form of aqueous dispersions, particularly as corrosion inhibiting metal coating compounds, moreover as adhesives, molded plastics and as binders, thickeners and auxiliaries in industrial chemical compositions.

Abstract: Polymers with polyvinyl acetal groups, which contain acetalized polyvinyl alcohol groups on polyurethane grafting substrates and which are prepared from graft polymers, containing vinyl alcohol groups on polyurethane grafting substrates, by reaction with aldehydes according to known methods. The aldehydes used can be any known aldehydes capable of acetalization reactions.The polyurethane grafting substrates contain at least 2 urethane groups in the molecule and units from diisocyanates and diols, and polymer radicals of units of vinyl carboxylates having 3 to 20 carbon atoms and/or hydrolysis products thereof and, if appropriate, further monomer units are grafted onto the polyurethane grafting substrates. The proportion of vinyl alcohol units in the hydrolyzed or partially hydrolyzed graft polymers before the acetalization is >10% by weight.In the acetalized polymer, the content of residual unacetalized vinyl alcohol units is >7.

Abstract: Aqueous solutions of polyamidoamine-epichlorohydrin resins and preparation and use thereof.A stable aqueous resin solution having a pH of not more than 7 and containing as the resin a water-thinnable polyamidoamine-epichlorohydrin resin (A) obtained by reaction of a water-thinnable basic polyamidoamine (B) comprising an acid component (B.sub.1) and an amine component (B.sub.2) with epichlorohydrin (C), the level of organically bound chlorine in the resin (A) being not more than 4% by weight.The present invention further relates to a process for preparing these products and to the use thereof in particular for increasing the wet strength of paper.

Abstract: Acetals of polyvinyl alcohol are described in which at least some of the acetal groups are derived from terminally etherified oxyethylene aldehydes/oxaalkanals of the formula ##STR1## The new acetals are internally plasticized and can be processed thermoplastically without external plasticizers. Depending on the nature of the radical R, which can be aliphatic, cycloaliphatic or aromatic, and the size of n, an integer, preferably 1 to 3, and, on the nature of other aldehydes which may be co-used for mixed acetalation, the new acetals are soluble in water or organic solvents.

Abstract: Use of polyamidoamines as curing agents for epoxy resins and curable mixtures containing these substances.The invention relates to the use of polyamidoamines (A) containing primary and/or secondary amino groups as curing agents for epoxy-containing compounds (B), wherein the polyamidoamines (A) used are those compounds which have been obtained by polycondensation of (a) compounds from the group of dicarboxylic acids containing oxyalkylene groups, or derivatives thereof (esters), with (b) polyamines containing at least two amino groups which are condensable with (a).The invention furthermore relates to curable mixtures containing the abovementioned components (A) and (B). The cured products obtainable according to the invention have advantages with regard to impact strength and shock resistance, to flexibility even at relatively low temperatures and crack-bridging properties.

Abstract: The invention is directed toward a base material for aluminum offset printing plates having improved heat stability comprising an aluminum alloy consisting of from about 0.2 to about 0.6% by weight of iron, less than about 0.25% by weight silicon and copper combined, from about 0.1 to about 0.3% by weight manganese and the remainder being aluminum and trace production impurities, said base material further characterized as containing secondary precipitates in the form of phases of the Al Mn Si: Al Fe: Al Mn type which bear a ratio to one another of from about 1:1:2 to about 1:1:3, the mean particle size being from about 0.25 to about 0.010 micron with a maximum particle size of less than about 0.3 micron and further containing a precipitation structure with a degree of dispersion of less than about 50 phases per cubic micron and a process for producing such material. The sheet material according to this invention may be uniformly roughened in either HCl or HNO.sub.

Abstract: A process for the recovery of rhodium from aqueous solutions of rhodium complex carbon atoms comprising adding a molar excess of a water-soluble salt of an organic carboxylic acid of 7 to 22 carbon atoms to an aqueous solution of a rhodium complex compound, treating the solution with an oxidant at 50.degree. to 200.degree. C. and recovering the rhodium as a water-insoluble compound.

Abstract: The invention relates to a stable epoxy resin dispersions and also a process for the preparation thereof and the use thereof, in particular for coatings. The epoxy resin dispersions which are remarkable, in particular, for good storage stability with a low content of organic solvents at the same time and little tendency to skin formation and yield coatings with good surface properties, contain, in addition to water, optionally small quantities of organic solvents and also optionally usual additives, as an essential constituent a condensation product of(a) 50 to 80% by weight of an epoxy compound containing at least two epoxy groups per molecule and having an epoxy equivalent to of 100 to 2,000.

Abstract: Arylcarboxylates of 2-hydroxypropionates are known, amongst other compounds, as dopes for converting tilted smectic liquid-crystal phases into ferroelectric liquid-crystal phases.The novel chiral aryloxypropionates of the general formula ##STR1## are two-fold chiral and in which the symbols have the following meaning: R.sup.1 denotes a straight-chain alkyl or alkoxy radical having 1 to 16 carbon atoms or a branched alkyl or alkoxy radical having 4 to 16 carbon atoms, it being possible for one or two non-adjacent CH.sub.2 groups to be replaced by a sulfur and/or oxygen atom;A denotes one, two or three aromatic or heteroaromatic rings which are linked to one another directly or via one or two COO groups;B denotes a chemical bond or one or two aromatic or heteroaromatic rings which are linked directly to one another;R.sup.2(a) if B is a chemical bond, denotes an alkyl radical having 2 to 10 carbon atoms which contains an asymmetrical carbon atom which is substituted by CH.sub.3, halogen or a COOC.sub.2 H.sub.

Abstract: Aqueous polymer dispersions based on (A) 1 to 99% by weight of a carboxy-functional polymer which additionally contains epoxy groups, (B) 1 to 99% by weight of a polymer obtained from at least one .alpha.,.beta.-olefinically unsaturated monomer, the polymer (B) having been prepared in the presence of polymer (A), (C) 0 to 20% by weight of anionic or non-ionic emulsifiers or a mixture of the two or protective colloids, the quantity data relating to the solids content of components (A) to (C), and if appropriate further conventional additives, the sum of all the components always being 100%.The invention also relates to a process for the preparation of such polymer dispersions, which are particularly suitable as a binder component in metallic basecoats or metal-free, (uni) basecoats and electrocoatings.

Abstract: A modified cyclopentadiene resin which comprises (a) 40 to 90% by weight of units of monomeric or oligomeric cyclopentadiene and/or its alkyl-substitution products, (b) 1 to 30% by weight of resols, (c) 5 to 40% by weight of non-aromatic, unsaturated monocarboxylic acids having 8 to 26 carbon atoms, (d) 0 to 10% by weight of .alpha.,.beta.-olefinic, unsaturated dicarboxylic acid units, (e) 0 to 20% by weight of other copolymerizable monomers and/or (f) 0 to 3% by weight of a metal compound from the groups IIa, IIb or IIIa of the periodic system, the sum of the components (a) to (f) always being 100% by weight, a single-stage process for its preparation, and the use of the modified cyclopentadiene resins as binders for printing inks, particularly for gravure inks.

Abstract: A device for separating coarse and/or fine particles from raw gas, including a filter shell with an inlet and an outlet for bulk material, granular bed filters reaching into the raw gas inlet duct, and purified gas outlets communicating with a common outlet duct.

Abstract: For working up concentrated, preferably partially condensed phosphoric acid which is contaminated with organic components, the phosphoric acid is first thoroughly mixed with fine-grained sand in a weight ratio of (0.5 to 1.5):1. Then, to neutralize the mixture, a basic, oxygen-containing calcium compound is added, while the thorough mixing is continued, until a 10% aqueous suspension of the mixture to which the calcium compound has been added has a pH between 5 and 11. Finally, the mixture which contains the calcium compound is commminuted after cooling.