Abstract: Naphtholactam dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, n, p, Z.sup.1, Z.sup.2 and the rings A, B, C and D each have the meanings stated in the description, and an optical recording medium which contains one or more naphtholactam dyes and may contain a base.

Abstract: 3,4-dihydro-2H-pyrans of the formula I ##STR1## where R.sup.1 is C.sub.4 -C.sub.20 -alkyl, C.sub.4 -C.sub.20 -alkoxyalkyl, aryl or C.sub.7 -C.sub.20 -arylalkyl, or is aryl or C.sub.7 -C.sub.20 -arylalkyl which bears from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -haloalkoxy, R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is aryl, or aryl bearing from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -haloalkoxy, or the radical ##STR2## where R.sup.4, R.sup.5 and R.sup.6 are hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.7 is phenyl or benzoyl, or phenyl or benzoyl bearing from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy and C.sub.1 -C.sub.

Abstract: Cable insulation having high resistance to the formation or growth of water trees and high aging resistance consists of an ethylene polymer and from 0.5 to 20 percent by weight of a styrene copolymer, which is a styrene/diene copolymer in which not less than 90% of the olefinic double bonds have been hydrogenated.

Abstract: Methine dyes (I) which conform in one of their tautomeric forms to the general formula ##STR1## where Y.sup.1 is in both or either case an electron-attracting group and the other Y.sup.1 is hydrogen,Y.sup.2 is in each case, independently of the others, hydrogen, --CN, halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, phenyl, pyridyl or together with a further Y.sup.2 a five- or six-membered ring which may have a fused-on benzene ring,R is hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.7 -C.sub.10 -aralkyl or .beta.

Abstract: Cyanate-functional resin adhesives, matrix resin films and prepregs which maintain their tack for extended periods may be prepared using silicone coated release film containing low levels of residual metal catalyst, or which have had their silicone coating prepared in the absence of such catalysts.

Abstract: Negative correction of gravure printing plates by filling undesirable depressions in the printing layer of the gravure printing plate with a correcting agent is carried out by a method in which the correcting agent used is a pasty material which is viscoplastic at room temperature and is based on a dispersion of a solid, highly fluorinated olefin polymer powder in an inert, sparingly volatile, organic dispersing liquid.

Abstract: Novel microorganisms can be used to convert n-eugenol to coniferylaldehyde.

Abstract: A continuous, substantially uniform tow useful in forming composite molded articles is prepared by forming a continuous tow of continuous carbon fibers, forming a continuous tow of thermoplastic polymer fibers to a selected width, uniformly and continuously spreading the carbon fiber two to a width that is essentially the same as the selected width for the thermoplastic polymer fiber tow, intermixing the tows intimately, uniformly and continuously, in a relatively tension-free state, and continuosuly withdrawing the intermixed tow.

Abstract: Unsaturated ketones of the formula ##STR1## and saturated ketones of the formula ##STR2## where R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, alkyl of 1 to 12 carbon atoms or a cycloalkyl, aryl, aralkyl or alkylaryl radical which inturn may be substituted, or R.sup.1 and R.sup.3 or R.sup.2 and R.sup.3, together with the carbon atoms to which they are bonded, may form a cycloalkane, are prepared by a process in which a 5-methylene-1,3-dioxolanone which is substituted in the 4-position and is of the forumla ##STR3## where R.sup.1, R.sup.2 and R.sup.3 have the above meanings, (a) for the preparation of an unsaturated ketone, is converted in the presence of a zeolite, of a phosphate having a zeolite structure and/or of B, Ce, Fe, Zr or Sr phosphate as catalysts and (b) for the preparation of a saturated ketone, is converted in the presence of the same catalysts which additionally carry one or more hydrogenation components.

Abstract: Preparation of substituted lactams Ia to Ic ##STR1## where n is 0 or 1, X is --O--CO--R.sup.1, --O--SO.sub.2 --R.sup.1, --CO--R.sup.2, --CO--O--R.sup.3 or --CO--NR.sup.4 R.sup.5, R.sup.1 is a C.sub.1 -C.sub.8 -radical of a carboxylic or sulfonic acid, R.sup.2 is C.sub.1 -C.sub.8 -alkyl, R.sup.3 is H or alkyl, aryl or aralkyl of not more than 8 carbon atoms, R.sup.4 and R.sup.5 are each H or C.sub.1 -C.sub.4 -alkyl or together form a 5-membered or 6-membered ring, by reacting a lactam II ##STR2## with a vinyl compound IIICH.sub.2 .dbd.CH-Xand a compound IV which forms free radicals to give Ia, and preparation of Ib by hydrolysis of a compound Ia in which X is (--O--CO--R.sup.1) or (--O--SO.sub.2 --R.sup.1), and preparation of Ic by thermolysis of Ib or of a compound Ia in which X is (--O--CO--R.sup.1) or (--O--SO.sub.2 --R.sup.1), and the novel substituted lactams Ia and Ib where X is (--O--CO--R.sup.1) and (--O--SO.sub.2 --R.sup.1).

Abstract: 3-Pentenoates are prepared by isomerization of 2-pentenoates to 3-pentenoates by a process in which the 2-pentenoate is treaated with from 0.01 to 0.5 mole of cyclic tertiary amine having a pK.sub.a of >6 per mole of 2-pentenoate at from 50.degree. to 250.degree. C. and the 3-pentenoate is distilled off continuously.

Abstract: 2-Substituted 4-acyloxy-2-butenals of the general formula I ##STR1## where R.sup.1 is alkyl of 1 to 12 carbon atoms which may be substituted by cycloalphatic, aromatic or heterocyclic radicals, by alkenyl or alkynyl or by hydroxyl, ether, thioether, acetoxy acyl, alkylamino, carboxyl or carbalkoxy, and R.sup.2 is acyloxy, are prepared by reacting a monosubstituted acetaldehyde of the general formula II ##STR2## where R.sup.2 has the abovementioned meaning, with an aldehyde of the general formula III ##STR3## where R.sup.1 has the abovementioned meaning, in the presence of a linear or cyclic secondary amine and of an organic acid at from 20.degree. to 100.degree. C.

Abstract: Crosslinked, finely divided, water-absorbing polymers are prepared in a batchwise process by copolymerization of 100 parts by weight of a monomer mixture of acrylic acid or methacrylic acid, each of which is neutralized with from 0 to 100 mol% of an alkali metal or ammonium base,or acrylamide, methacrylamide or N-vinylpyrrolidone with, as a crosslinking agent, from 0.01 to 5 parts by weight of a monomer containing two or more ethylenically unsaturated double bonds in 20-80% by weight aqueous solution in the presence of an initiator in a multistage procedure in a batchwise mixing apparatus wih constant thorough mixing in all stages, in the first stage the aqueous monomer solution being copolymerized at from 45.degree. to 95.degree. C. and under from 0.1 to 0.8 bar with removal of some of the water by distillation, in the second stage the copolymerization being completed at from 100.degree. to 170.degree. C.

Abstract: A process for the isolation of 4,4'-dichlorodiphenyl sulfone from a mixture of dichlorodiphenyl sulfones in which the ratios of the masses of 2,4'-dichlorodiphenyl sulfone and 3,4'-dichlorodiphenyl sulfone to the mass of 4,4'-dichlorodiphenyl sulfone are respectively from 0.5% to 20% and from 0.5% to 30% by treating the mixture with an alkanol at temperatures of from 20.degree. C. to 250.degree. C., cooling, and separating the pure 4,4'-dichlorodiphenyl sulfone that precipitates.

Abstract: Cyclohexanone oxime containing ammonium sulfate is purified by a process in which cyclohexanone oxime in the molten state is passed over an acidic ion exchanger and a basic ion exchanger.

Abstract: Compounds of the general formulae ##STR1## where R is versatyl and R' is unsubstituted or alkyl-substituted straight-chain alkylene of 4 or 5 carbon atoms can be prepared by reacting the versatic ester of 1,3-dihydroxy-propyl-2 acrylate and/or of 2,3-dihydroxy-propyl-1 acrylate with equimolar amounts of saturated or monoolefinically unsaturated cyclic dicarboxylic anhydrides having 4 or 5 carbon atoms and an oxygen atom in the ring at from 50.degree. to 150.degree. C. in the presence of customary esterification catalysts and can be used as reactive diluents in radiation-curable contact adhesives.

Abstract: Bismaleimide resion systems containing a bismaleimide and a multinuclear alkenyl and/or alkynyl arene as comonomers have improved toughness while maintaining high glass transition temperatures.

Abstract: Novel 6-(acylaminaryl)-3(2H)-pyridazinones of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, A and B have the meanings given in the description, and their preparation are described.The compounds have thrombocyte aggregation-inhibiting activity.

Abstract: A flexographic printing relief-plate, which has a relief layer (P), an interlayer (Z) and a base layer (U), is provided with a double-sided adhesive sheet (W). The double-sided adhesive sheet (W) transmits actinic light and is firmly bonded to the base layer (U) on one side. On the opposing side, the adhesive sheet (W) has an adhesive force of from 1 to 6 N/25 mm. This force is less than the adhesive force on the side bonded to the base layer (U). The adhesive sheet (W) permits the flexographic relief printing plate to be repeatedly adhered to and removed from the printing cylinder without damaging the plate.

Abstract: 1,4-Diaminoanthraquinone-2-sulfonic acid or salts thereof are reacted with cyanide ions at pH 8-11 in the presence of oxidizing agents in a mixture of water and 1-methoxy-2-propanol, 2-methoxy-1-propanol, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylpropionamide, dimethyl sulfoxide, dioxane, N-methylpyrrolidone or mixtures thereof, the ratio water: organic liquid being .gtoreq.3:1, the reaction proceeding at higher concentrations than in a purely aqueous medium and producing appreciably purer products in a high space-time yield.