Abstract: The present invention relates to low-odor binders which can be processed without solvent and are based on aqueous styrene-acrylate polymer dispersions, having a mean film-forming temperature of below 10.degree. C.The invention also relates to low-emission coating compositions, especially emulsion paints, which comprise these binders.

Abstract: A continuous process for preparing bead-form expandable styrene polymers in which the styrene is prepolymerized in bulk to a conversion of 10 to 80%, the prepolymer is dispersed in liquid form in an aqueous phase in the presence of suspension stabilizers, and the polymerization of the prepolymer is completed in an aqueous suspension to a residual styrene content of less than 2000 ppm.

Abstract: Iminooxybenzyl compounds of the formula I ##STR1## where R.sup.1 is C(CO.sub.2 R.sup.a).dbd.CHR.sup.b, C(CO.sub.2 R.sup.a).dbd.CHOR.sup.b, C(CO.sub.2 R.sup.a).dbd.NOR.sup.b or C(CONR.sup.a R.sup.c).dbd.NOR.sup.b ;R.sup.a, R.sup.b are alkyl;R.sup.c is hydrogen or alkyl;R.sup.3 is hydrogen, cyano, halogen, alkyl, haloalkyl, alkenyl, alkoxy, alkynyl, haloalkoxy, alkenyloxy, haloalkenyloxy, alkynyloxy, haloalkynyloxy, alkylthio, haloalkylthio or (bi)cycloalkly;R.sup.4 is hydrogen, cyano, halogen, optionally substituted alkyl, alkoxy, alkylthio, alkenyl, alkenyloxy, alkenylthio, alkynyl, alkynyloxy or alkynylthio; an optionally substituted ring which can contain, as ring members, one to three of the following hetero atoms: oxygen, sulfur and nitro, in addition to carbon atoms, and which can be bonded to the skeleton directly or via an oxygen or sulfur atom; or an optionally substituted aromatic or heteroaromatic radical;R.sup.

Abstract: A process for removing water and ammonia from benzophenone imine reactor effluents resulting from the catalytic reaction of benzophenones of the formula I ##STR1## where R.sup.1 and R.sup.2, have the meaning stated in the specification and wherein ammonia is distilled off from effluents and wherein water is either distilled off from the effluents over removed non-distillatively.

Abstract: 1,4-butanediol and THF are prepared from furan by a process which comprises converting furan in the presence of water and hydrogen but in the absence of a water-soluble acid in a single stage over a hydrogenation catalyst, the hydrogenation catalyst containing at least one element of subgroup I, V, VI, VII or VIII in the form of a compound or in elemental form and the restriction that the catalyst does not contain nickel alone being applicable.

Abstract: Aqueous latent-crosslinking polyurethane dispersions, comprisingI) a disperse phase (P.I) includingIa) polyurethanes (PUR.Ia) carrying not only groups which render the polyurethane dispersible in water but also groups with a C--C double bond which is activated by a carbonyl attached directly to it, orIb) a mixture ofa polyurethane (PUR.Ib) carrying groups which render the polyurethane dispersible in water but no groups with a C--C double bond which is activated by carbonyl attached directly to it, anda compound (V.I) different from the polyurethanes PUR.Ia and PUR.Ib, which carries groups with a C--C double bond which is activated by a carbonyl attached directly to it, andII) a compound havingon average at least 2 hydrogens present as amino function,a solubility in water of more than 1 g/l (25.degree. C.) anda number-average molecular weight (M.sub.n) of from 200 to 1,000,000 (compound II).

Abstract: Process for regenerating a silver catalyst deactivated by coking during the gas phase epoxidation of 1,3-butadiene by reacting the coked catalyst with a gas mixture containing at least 5% by volume of water vapor and up to 95% by volume of oxygen at temperatures of from 100 to 500 .degree. C.

Abstract: Novel bicomponent fibers have a sheath domain and an core domain which is embedded entirely within, and thereby completely surrounded by, the polyamide domain. The core domain is annular and defines a longitudinally extending central void. The preferred bicomponent fibers have a sheath-core structure wherein the polyamide domain constitutes the sheath and a fiber-forming polyolefin polymer constitutes the core. The preferred trilobal bicomponent fibers will exhibit a modification ratio of between 2 to 4, an arm angle of between 7.degree. to about 35.degree., and a total cross-sectional void area between about 3 and about 10 percent. Each lobe of the fiber may optionally contain a lobal void space which, if present, is preferably radially elongate in cross-section.

Abstract: Alkenylaromatics are produced by catalytic oxidative dehydrogenation of alkylaromatics employing a redox catalyst which is bismuth oxide, in combination with an additive compound of an alkali metal and/or an alkaline earth metal, on a titanium diooxide carrier. In a first reaction step, an alkylaromatic starting material is oxidatively dehydrogenated with the redox catalyst in the absence of molecular oxygen with attending reduction of the redox catalyst. In a second reaction step, the reduced redox catalyst is reoxidized with an oxygen-containing gas.

Abstract: An electrodeposition process using an aqueous coating composition comprising a carbamate-functional crosslinking agent and at least one principal resin is described. The carbamate-functional crosslinker is formed by first reacting a polyamine having at least two primary amine groups and at least one secondary amine group with a cyclic carbonate, and then reacting the product of the first reaction with a polyepoxide compound.

Abstract: In a process for preparing polystyrene by continuous anionic polymerization of styrene monomer by means of a catalyst based on a metal alkyl preferably in the presence of a solvent at a temperature in the range from 30 to 70.degree. C., the styrene monomer is fed to an essentially isothermally operated circulation reactor configured as a closed tube loop which has, for example, a specific cooling area of at least 50 m.sup.2 per m.sup.3 of reactor volume, with the circulation velocity of the reaction mixture and the residence time being set such that the monomer conversion reaches at least 50% and the polymerization is completed in an essentially backmixing-free tube reactor.

Abstract: A process for reacting an organic compound in the presence of a catalyst, wherein the catalyst comprises a homogeneous ruthenium compound or a mixture of two or more thereof deposited in situ on a support.

Abstract: Pyrazolo pyrimidines of the formula I ##STR1## where the indices and the substituents have the meanings defined in the specification, processes for their preparation and their use are described.

Abstract: There is now provided a method of recycling toluenediisocyanate residue resulting from the production of toluenediisocyanate by the reaction of toluenediamine by phosgenation in the presence of a solvent. In accordance with the teachings of the present invention, the toluenediisocyanate residue is treated at reflux with an alkanolamine to obtain an intermediary product which is distilled thereby giving rise to various products including but not limited to at least one component selected from toluenediamine, oxazolidone and hydroxyethylimidiazolidone. Preferably the alkanolamine employed is a monoethanolamine.

Abstract: The invention relates to a process for preparing an offset printing ink or concentrate thereof from the individual components on which the printing ink is based, which involves combining the individual solid and liquid components in a mixer and processing them directly therein to form the offset-printing ink or concentrate.

Abstract: A flexible, flame-bondable polyurethane-polyether block foam is prepared by a process in which at least one diol is added to the block foam.

Abstract: The invention relates to a process for recycling diaphragms, in particular a process for recycling used asbestos-free diaphragms from alkali metal chloride electrolysis, the diaphragm material being comminuted, the diaphragm material being washed with a wash substrate and a reusable material being obtained.

Abstract: Stabilized polyurethanes comprise as stabilizers diglycidyl terephthalate and/or triglycidyl trimellitate in combination with UV filters. Corresponding stabilizer concentrates are also provided.

Abstract: A plate-type valve and method of using same to control fluid flow are disclosed, wherein the plate-type valve contains:a first valve plate having a first channel formed therein;a second valve plate having a second channel formed therein and a valve seating portion;a flexible member having a movable free end and being disposed between the first channel and the second channel, the movable free end of the flexible member being disposed for movement onto and off of the valve seating portion by means of an actuating force such that movement of the movable free end onto the valve seating portion prevents fluid flow between the first channel and the second channel and movement of the movable free end off of the valve seating portion allows fluid flow between the first channel and the second channel.

Abstract: In a process and an apparatus for the continuous preparation of alkyl esters of (meth)acrylic acid by reacting (meth)acrylic acid and monohydric alkanols of 1 to 8 carbon atoms in the homogeneous, liquid, solvent-free phase at elevated temperatures and in the presence of an acidic esterification catalyst, by feeding the (meth)acrylic acid, the alkanol and the acid catalyst continuously to a reaction zone, the reaction zone consists of a cascade of at least two reaction regions connected in series, and the discharge stream of one reaction region forms a feed stream of a downstream reaction region. The cascade may have from two to four reaction regions is spatially separated from one another.