Abstract: A process for recovering caprolactam from waste containing both polycaprolactam and materials which are insoluble in acidic solvents for polycaprolactam includes agitating the waste in an acidic solvent capable of dissolving polycaprolactam without degrading the acid insoluble materials, separating the solution containing polycaprolactam from the acid insoluble materials, feeding the solution containing the polycaprolactam to a depolymerization reactor, without substantially precipitating the polycaprolactam and depolymerizing the polycaprolactam solution to obtain substantially pure caprolactam.

Abstract: Disclosed is a method for producing polyamide fibers with reduced flammability by melt mixing a polyamide with a phosphate ester of the general formula: ##STR1## wherein n is a number of from 1 to 10;m is a number of from 0 to 3;x is a number of from 0 to 3;R is linear or branched C.sub.1 - to C.sub.18 - alkyl radical;at a temperature of from about 180.degree. to about 280.degree. C., and melt spinning fibers.

Abstract: Polyalkylpiperidine derivatives of the formula I ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.8 -alkyl, phenyl- or tolylalkyl with 1 to 4 carbon atoms in the alkyl, C.sub.1 -C.sub.6 -acyl, benzoyl, allyl, cyanomethyl, hydroxyethyl, aminoethyl, hydroxyl or oxyl free radical,R.sup.2 is a radical of the formula ##STR2## R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are as defined in the specification. Included are tautomers and acid addition salts of the compound I. The compounds are used as UV absorbers and stabilizers for organic material.

Abstract: Crop oil concentrates are disclosed which increase the herbicidal efficacy of herbicides from diverse chemical classes. These crop oil concentrates comprise an anionic polyoxyalkylene surfactant or salt thereof, an adjuvant which is exclusively a fatty acid or its ester, and a hydrocarbon component. These crop oil concentrates are especially effective with cyclohexenone and triketone herbicides and growth regulators.

Abstract: A one component composition suitable for coating a substrate, including at least one crosslinker having a functionality thereon that is reactive with a functionality on at least one film forming polymer. The crosslinker includes at least one member selected from the group consisting of: blocked isocyanurates of isophorone diisocyanate; derivatives of blocked isocyanurates of isophorone diisocyanate; blocked biurets of isophorone diisocyanate; derivatives of blocked biurets of isophorone diisocyanate. The composition preferably includes a blend of this crosslinker with a second crosslinker, wherein the second crosslinker is at least one member selected from the group consisting of: blocked isocyanurates of hexamethylene diisocyanate; derivatives of blocked isocyanurates of hexamethylene diisocyanate; blocked biurets of hexamethylene diisocyanate; and derivatives of blocked biurets of hexamethylene diisocyanate.

Abstract: A process for the preparation of a 2-(3-aminopropyl)-cycloalkylamine of the general formula I ##STR1## in which the subscript n is an integer from 1 to 4, from a 2-(2-cyanoethyl)-cycloalkanone of the general formula II ##STR2## in which the subscript n has the meaning stated, wherein the following stages are carried out in discrete reaction chambers:a) the 2-(2-cyanoethyl)-cycloalkanone of formula II is reacted in a first reaction chamber with excess ammonia over an acidic heterogeneous catalyst at a temperature from 20.degree. to 150.degree. C. and a pressure of from 15 to 500 bar, andb) in a second reaction chamber, the reaction product from stage a) is hydrogenated at a temperature of from 60.degree. to 150.degree. C. and a pressure of from 50 to 300 bar in the presence of excess ammonia over a catalyst containing cobalt, nickel, ruthenium, and/or some other noble metal, which catalyst optionally contains a basic component or is supported on neutral or basic supporting material.

Abstract: Polyphenylene ethers are prepared from monohydric phenols by oxidative coupling with oxygen-containing gases in the presence of an oxidation catalyst in an organic solvent by carrying out the polycondensation in the presence of a defoamer.

Abstract: A component having a virtually rectangular force-displacement characteristic line and comprising an elongated polymer foam block (1) of rectangular cross-section having sides a and b and having a recess (2) of width d and depth c extending along the entire length of the block on one side, said dimensions satisfying certain equations.

Abstract: Additives are introduced into a thermoplastic melt by feeding at least one additive in an aqueous vehicle containing a dispersant to form an aqueous additive stream to a vented extruder which is extruding a thermoplastic followed by volatilizing an aqueous portion of the aqueous additive stream and removing substantially all the volatilized aqueous portion through the extruder vent to achieve a substantially homogeneous system containing the thermoplastic and at least one additive and forming a fiber from the homogeneous system by extrusion of the system through a spinneret.

Abstract: The present invention is directed to an aqueous anionic polyurethane dispersion, obtainable bya) dispersing a polyurethane resin, having carboxylic acid groups, in water in the presence of a tertiary amine andb) reacting the carboxylic acid groups on the polyurethane resin with an organic compound having at least two oxirane groups,a basecoat containing said dispersions,a method of coating a substrate with said basecoat and a coated substrate.

Abstract: A process for the preparation of hydroxylammonium salts by the reduction of nitrogen oxide (NO) with hydrogen in dilute aqueous mineral acid in the presence of a suspended platinum catalyst which is partially poisoned with arsenic, at elevated temperature, wherein the catalyst used is one which has been produced by precipitation of metallic platinum from an aqueous solution on to a suspended support in the presence of an oxidic arsenic compound, by means of a reducing agent.

Abstract: The refractive index and thickness of ultrathin layers<1 .mu.m in thickness are determined by recording the layers, which have been applied to a solid support, by surface plasmon microscopy as a function of the angle of incidence of the incident laser beam, the method making it possible to determine layer thicknesses with a vertical resolution.gtoreq.0.1 nm and a simultaneous lateral resolution.gtoreq.5 .mu.m.

Abstract: Impact modified thermoplastic polyurethane-polyester molding materials containing, based on 100 parts by weight of (A) to (C),A) from 30 to 90 parts by weight of at least one thermoplastic polyurethane elastomer,B) from 5 to 65 parts by weight of at least one thermoplastic polyester, preferably a polyalkylene terephthalate, andC) from 5 to 30 parts by weight of at least one graft rubber based on a polybutadiene (C1) or polyacrylate (C2) or a mixture of these graft rubbers andD) from 0 to 60% by weight of at least one fibrous or particulate filler andE) from 0 to 10% by weight of at least one assistant,the weight percentages being based on the weight of (A) to (C), are prepared by homogenizing the formative components at 190.degree.-250.degree. C.

Abstract: The invention relates to a process for the coating of electrically conducting substrates in which(1) the substrate is immersed in an aqueous electrocoating paint comprising at least one cathodically depositable resin,(2) the substrate is connected as cathode,(3) a film is deposited on the substrate using direct current,(4) the substrate is removed from the electrocoating paint and(5) the deposited paint film is baked.In this invention an electrically conducting substrate coated by a coating produced by plasma polymerization is employed as substrate.

Abstract: N-substituted 3,4,5,6-tetrahydrophthalimides and their intermediates of the general formula I ##STR1## where A is --NO.sub.2, --NH.sub.2 or ##STR2## corresponding to the compounds Ia, Ib and Ic, B is --CH.sub.2 --, --CH.sub.2 --CHR.sup.1 --, --CH.sub.2 --CHR.sup.1 --CH.sub.2 --, --CH.dbd., --CH.dbd.CR.sup.1 -- or --CH.dbd.CR.sup.1 --CH.dbd., R.sup.1 being --H, --Cl, --Br or --CH.sub.3, D is ##STR3## or .dbd.C<, depending on the terminal group B, X is --H, --Cl or --Br, Y is --H, C.sub.1 -C.sub.7 -alkyl, --Cl, --Br, --CN, --CONH.sub.2 or --CO.sub.2 R.sup.2, where R.sup.2 is H, C.sub.1 -C.sub.6 -alkyl, C.sub.5 - or C.sub.6 -cycloalkyl, C.sub.1 -C.sub.4 -alkoxy-C.sub.2 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkylmercapto-C.sub.2 -C.sub.4 -alkyl, propargyl, benzyl, .alpha.-phenylethyl, .alpha.-phenylpropyl, C.sub.2 -C.sub.4 -alkyl which is monosubstituted, disubstituted or trisubstituted by F or Cl, or CH.sub.3 -substituted or Cl-substituted allyl, and Z is --COOR.sup.2, --CONR.sup.3 R.sup.4, ##STR4## or --COR.

Abstract: A free-flowing granulated riboflavin product has granules comprised of from about 75 to about 99.5 weight percent riboflavin. The riboflavin product exhibits a flowability index of from about 75 to about 750.

Abstract: The invention relates to water blown integral skin polyurethane foams made with a particular isocyanate quasi-prepolymer and resin side ingredients to yield a foam having good overall mechanical properties. The isocyanate quasi-prepolymer component of the present invention comprises from 0.5 weight percent to 30.0 weight percent or less uretonimine-carbodiimide-modified diphenylmethane diisocyanate, from 50 weight percent to 80 weight percent 4,4'-diphenylmethane diisocyanate and reacted with from 15 weight percent to 40 weight percent of a polyether polyol containing predominately secondary hydroxyl groups and having an average molecular weight from about 2,000 to 10,000, an average functionality from 1.5 to about 3.2, and a hydroxyl number from about 20 to 60, and optionally with a low molecular weight diol in an amount of from 1.0 weight percent to 10 weight percent, the weight percentages based on the weight of the quasi-prepolymer reactants.

Abstract: Haloalcohols of the general formula IHal--X--OH (I)where X is straight-chain or branched, substituted or unsubstituted alkylene of 4 or more carbon atoms in the chain, which may be interrupted by one or more heteroatoms, and Hal is halogen, are prepared by reacting a diol of the general formula IIHO--X--OH (II)where X has the above meanings, with an aqueous hydrogen halide solution in a water-immiscible organic solvent which is inert under the reaction conditions, at from 50.degree. to 150.degree. C., using an excess of hydrogen halide, based on the diol of the general formula II, of from 10 to 200 mole percent and setting a volume ratio of inorganic phase: organic phase of from 1:2 to 1:50.

Abstract: Substituted trifluoro- and chlorodifluoromethoxypyrimidines of the formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each, independently of one another, hydrogen, halogen or haloalkyl, and R.sup.1 and/or R.sup.2 are also trifluoromethoxy or chlorodifluoromethoxy, and n is 0 or 1, are prepared as described.

Abstract: The invention pertains to a water blown integral skin polyurethane foam having a skin with good abrasion resistance. The foam is manufactured by employing as a polyol composition a polyol having a functionality of from 1.75 to 2.65 and a molecular weight of from 1500 to 5000 along with a surfactant and water as a blowing agent. The particular surfactant is a particular siloxane or an ethylene oxide adduct of octylphenol.