Abstract: An expandable styrene polymer comprisinga) a styrene polymer,b) from 1 to 10% by weight, based on a), of a saturated C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent, and, if desired,c) conventional assistants in effective amounts, has a benzene content of less than 1 ppm and a styrene content of less than 2000 ppm.

Abstract: The use of an aminovinyl-substituted heterocyclic compound of the general formula I ##STR1## in which R.sup.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, or halogen, and, if more than one radical R.sup.1 are present, these may be the same or different,R.sup.2 denotes cyano or C.sub.1 -C.sub.20 -alkoxycarbonyl or C.sub.3 -C.sub.6 -cycloalkoxycarbonyl,R.sup.3 denotes hydrogen, C.sub.1 -C.sub.18 -alkyl, C.sub.1 -C.sub.18 -alkoxy, halogen, cyano, C.sub.1 -C.sub.20 -alkoxycarbonyl, or C.sub.3 -C.sub.6 -cycloalkoxycarbonyl, and, if more than one radical R.sup.3 are present, these may be the same or different,X denotes NH, O or S,m is equal to 1 or 2, andn is an integer from 1 to 5,as a stabilizer for organic materials.

Abstract: Pyridines of the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl or an acyl radical COR.sup.2 ; R.sup.2 is C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl, C.sub.1 -C.sub.6 -haloalkyl or substituted or unsubstituted aryl; A is one of the groups ##STR2## where R.sup.3 and R.sup.4 are identical or differ and each is C.sub.1 -C.sub.6 -alkyl, with the proviso that R.sup.3 and R.sup.4 are not simultaneously methyl; R.sup.5 is one of the groups (CH.sub.2).sub.n, CH.sub.2 OCH.sub.2, CH.sub.2 S(O).sub.m CH.sub.2, CH.sub.2 CH.sub.2 O or CH.sub.2 CH.sub.2 S(O).sub.m, n denoting 1, 2, 3, 4 or 5, and m being 0, 1 or 2; Ar is aryl which is unsubstituted or bears from one to five substituents selected from the group consisting of C.sub.1 -C.sub.6 -alkyl, phenyl, halogen, C.sub.1 -C.sub.6 -haloalkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.6 -haloalkoxy, C.sub.1 -C.sub.

Abstract: Molding materials are composed ofA) from 40 to 100% by weight, based on the total weight of the molding material, of a polyamide mixture based ona.sub.1) from 5 to 30% by weight, based on the total weight of the polyamide mixture, of at least one homo- or copolyamide that contains olefinic double bonds and comprises.alpha.) from 40 to 100 mol %, based on homo- or copolyamide, of at least one monomer that contains at least one olefinic double bond (monomers .alpha.) from the group of the.alpha..sub.1) olefinically unsaturated lactams,.alpha..sub.2) olefinically unsaturated aminocarboxylic acids,.alpha..sub.3) olefinically unsaturated dicarboxylic acids,.alpha..sub.4) olefinically unsaturated diamines, and.beta.) from 0 to 60 mol %, based on homo- or copolyamide, of at least one monomer that contains no olefinic double bonds (monomers .beta.) from the group of the.beta..sub.1) lactams.beta..sub.2) aminocarboxylic acids,.beta..sub.3) dicarboxylic acids,.beta..sub.4) diamines, anda.sub.

Abstract: Transfer films consist essentially of a support film, a release layer and a transfer layer detachable from this release layer and composed of two magnetic layers and said transfer films may have, on the second magnetic layer, an adhesive layer which serves for fixing the transfer layer to a substrate, the two magnetic layers each containing a magnetizable material having a different coercive force.

Abstract: Quaternized azo dyes whose diazo components are derived from a five-membered nitrogen-containing aromatic aminoheterocycle and whose coupling components are derived from the aniline series are prepared by reacting to corresponding neutral dye-bases with an alkylating agent in .gamma.-butyrolactone as inert diluent.

Abstract: .omega.-Formyl-C.sub.4 -C.sub.20 -alkanecarboxylic esters are prepared by reacting C.sub.4 -C.sub.20 -alkenecarboxylic esters with carbon monoxide and hydrogen at from 30.degree. to 150.degree. C. and under from 0.01 to 30 bar in the presence of rhodium carbonyl complexes which are modified with polyphosphites.

Abstract: The present invention is a prepolymer or quasi-prepolymer formed from the reaction of a given amount of a diphenyl methane diisocyanate having at least 5 percent of the 2,4'-isomer and polytetramethylene ether glycols having a molecular weight between 162 and 3000. The glycol which may be combined with other polyether or polyester glycols. The resulting NCO-terminated prepolymer or quasi polymer is a liquid which is stable at temperature of 15.degree. C. for at least 24 hours.

Abstract: UV-crosslinkable materials based on (meth)acrylate copolymers and containing special modified unsaturated benzophenone derivatives as copolymerized units are used as hotmelt adhesives, for coating sheet-like mineral substrates and as surface coatings.

Abstract: A process for preparing caprolactam by Beckmann rearrangement of cyclohexanone oxime with oleum at from 85.degree. to 125.degree. C. in a plurality of rearrangement stages arranged in series entails returning a portion of the reaction mixture leaving the last rearrangement stage to at least one of the preceding rearrangement stages.

Abstract: The present invention relates to an improved process for producing, by means of a portable foaming apparatus having a static mixer, a polyurethane foam by reacting a reaction mixture comprised of a polyol, an organic isocyanate, a foaming/frothing agent, and a reaction catalyst, the improvement comprising employing monochlorodifluoromethane as the sole blowing/frothing agent in said reaction in order to produce a CFC-free essentially closed-cell rigid or semi-rigid polyurethane foam. Also claimed is the foam produced by the above process.

Abstract: A process for preparing isoxazole-3,4-dicarboxylic acid derivatives of the formula I ##STR1## where R.sup.1 is hydrogen, alkyl, cycloalkyl or phenyl, or a 5- to 6-membered heterocyclic radical, and the organic radicals can have substituents which are inert under the reaction conditions;R.sup.2 is hydrogen, alkyl, cycloalkyl, benzyl or C.sub.3 -C.sub.6 -alkenyl;A is NR.sup.3 R.sup.4 where R.sup.3 is hydrogen or an aliphatic or cycloaliphatic radical and R.sup.4 is an aliphatic or cycloaliphatic radical or unsubstituted or substituted phenyl, or R.sup.3 forms together with R.sup.4 a 4- to 7-membered alkylene chain which can be interrupted by oxygen, sulfur or N-methyl, or is OR.sup.5 where R.sup.5 is alkyl, cycloalkyl, benzyl or alkenyl;by deprotonation of a CH-acid compound of the formula II ##STR2## using a base and reacting with hydroximyl chlorides of the formula III ##STR3## wherein a magnesium alcoholate of the formula IVMg(OR.sup.6 ).sub.2 IVwhere R.sup.

Abstract: The invention relates to rigid integral skin polyurethane structural foam having high impact strength, high heat distortion, and flame retardant properties. The foam is prepared from triisopropanolamine-initiated polyoxyalkylene (TIPA) polyether polyols oxyalkylated with a compound producing primary hydroxyl functional termination. The polyether polyol is advantageously of a molecular weight sufficient to enable TIPA to flow well while retaining its flame retardant characteristics in the foam.

Abstract: Solutions of polyimide-forming starting materials are provided containing diamines and tetracarboxylic diesters; the tetracarboxylic diesters comprise a mixture of from 0.05 to 0.95 mol % of oxydiphthalic diesters and from 0.05 to 0.95 mol % of benzophenonetetracarboxylic diesters, biphenyltetracarboxylic diesters or mixtures thereof.

Abstract: A benzofurancarboxamide of the formula: ##STR1## where: X is hydrogen or methoxy,R.sup.1 is a radical of the formula: ##STR2## wherein R.sup.3 to R.sub.5 are each, independently of one another, hydrogen or C.sub.1-6 alkyl, R.sup.6 is a branched or unbranched C.sub.1-6 alkyl, or benzyl which may be methyl- or halogen-substituted on the nucleus, and is a single or double bond.

Abstract: Phenoxyalkyl-substituted heteroaromatics of the general formulae Ia and Ib ##STR1## where A is an unsubstituted or substituted heteroaromatic radical having 6 ring members and 1, 2 or 3 nitrogen atoms in the ring, R.sup.1 is hydrogen, halogen or C.sub.1 -C.sub.3 -alkyl, R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl, Q.sub.a is an unsubstituted or substituted azole radical and Q.sub.b is a substituted or unsubstituted heteroaromatic radical which has a five-membered ring, and their use for combating pests.

Abstract: Azo dye polymers useful in nonlinear optics contain as characteristic monomer units radicals of the formulae I, II, III and IV ##STR1## where D is the radical of a heterocyclic diazo component,R.sup.1 and R.sup.2 are each hydrogen, C.sub.1 -C.sub.6 -alkyl or substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxy, and R.sup.2 may also be C.sub.1 -C.sub.4 -alkanoylamino,R.sup.3 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl or C.sub.3 -C.sub.4 -alkenyl,R.sup.4 is hydrogen, deuterium, methyl, trideuterated methyl or chlorine,R.sup.5 is hydrogen or deuterium,Y.sup.1 and Y.sup.2 are each substituted or unsubstituted C.sub.2 -C.sub.10 -alkylene,W is oxygen, imino or C.sub.1 -C.sub.4 -alkylimino, andX is hydroxyl, substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxy, phenoxy, amino or mono- or di(C.sub.1 -C.sub.4 -alkyl)amino,and have an average molecular weight of from 1,000 to 100,000.

Abstract: Described is a spinnerette plate for the manufacture of multilobal fibers which at least has one opening having a plurality of lobes, each lobe having two ends, one end being connected to the other lobes, the other end of each the lobes radiating outwardly and each lobe having a plurality of projections alternating along the contour of each lobe.

Abstract: A process for the catalytic gas-phase oxidation of acrolein to acrylic acid in a fixed-bed reactor with contacting tubes, at elevated temperature on catalytically active oxides with a conversion of acrolein for a single pass of .gtoreq.95%, wherein the reaction temperature in the flow direction along the contacting tubes in a first reaction zone before the starting reaction gases containing the reactants enter the contacting tubes is from 260.degree. to 300.degree. C. until an acrolein conversion of from 20 to 40% is reached, and the reaction temperature is subsequently reduced by a total of from 5.degree. to 40.degree. C., abruptly or successively in steps or continuously along the contacting tubes until a methacrolein conversion of .gtoreq.95% has been reached, with the proviso that the reaction temperature in this secondary reaction zone is not lower than 240.degree. C.

Abstract: A process useful for the reversible storage of information units involves the targeted, positionally selective and time-stable labeling of individual atomic positions or groups of such positions on the surface of a solid by chemical reaction with foreign atoms or molecules or by chemisorption, with the lateral atomic order of the surface in each case being retained, even on a local level.