Abstract: A stryrene/butadiene graft copolymer latex has a graft substrate component with a comparatively high content of repeating units obtained by polymerization of styrene. The graft copolymer exhibits correspondingly comparatively hard and soft regions with a high and a low Tg, respectively.Vulcanizable compositions based thereon can be used for production of latex foams distinguished by a low compression set in a temperature range from 20.degree. to 70.degree. C., a high tensile strength, and a high elongation at break, and by a high compression resistance.

Abstract: Wax-like esterification products derived from optionally partially saponified hard paraffin oxidation products and mono- or multivalent alcohols, which are suitable particularly as lubricants for plastics processing, are formed in the melt with particularly high degrees of esterification and without discolorization. The conversion is conducted at 160.degree. to 220.degree. C. in the presence of zinc salts such as zinc stearate.

Abstract: The invention relates to thermoplastic molding compositions comprised of polyphenylene ethers, impact-resistant styrene polymers, and a pulverulent, filler-containing rubber; and further comprised of various additives. The present invention also relates to a method(s) for preparing such compositions. Preferably the pulverulent, filler-containing rubber is prepared from an E-SBR rubber (emulsion polymerized SBR rubber) produced according to German Pat. No. 2,822,148.

Abstract: A process for the isomerization of isolated double bonds to conjugated double bonds in low-molecular weight homo- and/or copolymers of 1,3-dienes uses an isomerization catalyst optionally in the presence of a solvent, wherein the isomerization catalyst is a mixture of(a) a hydroxide of the alkali metals potassium, rubidium, or cesium, and an alcohol or(b) a lithium alcoholate or sodium alcoholate and a potassium, rubidium, or cesium salt or(c) sodium hydroxide, an alcohol, and a polar, aprotic compound.The isomerization is conducted at a temperature of 80.degree.-220.degree. C.

Abstract: Composite materials and composite building elements have two layers:(1) a layer obtained from a vulcanizable composition based on EP(D)M and(2) a layer obtained from a vulcanizable composition based on an elastomer component consisting of 5-50% by weight of a polyoctenylene elastomer and 50-95% by weight of an elastomer, or several elastomers, selected from the group of SBR, NBR, CM and the diene elastomers.The strength of the interlayer bond attained by vulcanization welding is good to excellent.

Abstract: Improved molding compositions based on high-molecular polyalkylene terephthalates are obtained by heating at 240.degree.-300.degree. C. a melt containing a mixture of(A) a polyalkylene terephthalate having a viscosity number J of at least 50 cm.sup.3 /g, and(B) 0.05-2.5 parts by weight, based on 100 parts by weight of the molding composition of a cyclic, trimerized isophorone diisocyanate or an oligomer thereof with a degree of oligomerization of 2-5 with an isocyanate functionality of 3-7.

Abstract: In a pressure swing adsorption process conducted in a plurality of cyclically interchangeable adsorbers, for recovering a hydrocarbon, e.g.

Abstract: For the production of acrylonitrile polymers containing phosphonic acid groups and having phosphorus contents of 1-17% by weight, homo- or copolymers of acrylonitrile having molecular weights of 1,000-200,000 are reacted at temperatures of 120.degree.-220.degree. C. with 0.2-8 moles of phosphorous acid per mole of nitrile group. Preferably, a melt is prepared from phosphorous acid, and the acrylonitrile polymer is added thereto in metered quantities.

Abstract: The reaction gases from the chlorination of methane and preferably also methyl chloride, after removal of the HCl and drying, are subjected to the steps of partially condensing the dried stream of reaction gases at a pressure of 5-15 bars and at a temperature of 0.degree.-40.degree. C. which condenses the chloroform and the carbon tetrachloride; contacting the gaseous phase of the partially condensed stream of reaction gases in a countercurrent manner with a stream of liquid methyl chloride; recycling the stream of gases discharging from the contacting stream of liquid methyl chloride to the chlorination stage; and fractionating the contacting stream of liquid methyl chloride.

Abstract: For the continuous manufacture of n-butyraldehyde by selective hydrogenation of crotonaldehyde, the hydrogenation is conducted in the liquid phase in the presence of a palladium-aluminum oxide supported catalyst containing the palladium in the outer layer of the supporting grain of a thickness of 0.05-0.2 mm. The palladium content of this catalyst is 0.1-0.6% by weight. The aluminum oxide support, with a specific pore volume of 0.4-0.6 cm.sup.3 /g, has 40-60% of its pores of a diameter of >0.5 nm and an internal surface area of 130-160 m.sup.2 /g. The hydrogenation is conducted under absolute pressures of 5-50 bar and at temperatures of 20.degree.-100.degree. C. The resultant n-butyraldehyde is of a high purity without interfering by-products.

Abstract: A process for phosphating metallic surfaces in nonaqueous phosphating baths comprising low-boiling halogenated hydrocarbons, aqueous phosphoric acid as the phosphating agent, alcohols as the solubilizer, and, optionally, further known components, e.g., stabilizers, inhibitors, or accelerators, comprising dipping the workpieces to be phosphated at least twice for at least 10 seconds into the boiling phosphating bath and, in the interval, leaving them for at least 20 seconds in the gaseous phase.

Abstract: A process for the post condensation of poly(alkylene terephthalate) in the solid phase is carried out in the presence of esters of phosphorous acid at 25.degree.-65.degree. C. below the melting point of the poly(alkylene terephthalate) while passing an inert gas stream through the reaction mixture.

Abstract: A process for the isomerization of isolated double bonds to conjugated double bonds in optionally substituted cyclooctadienes using alkali metal or alkaline earth metal amides, if desired in the presence of a solvent, requires that the alkali metal or alkaline earth metal amide be produced with exclusion of moisture and under a protective gas atmosphere in the presence of the cyclooctadiene to be isomerized; and that the isomerization be conducted at temperatures of 70.degree.-200.degree. C.

Abstract: N-oxalkylated derivatives of aniline of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently is hydrogen, NH.sub.2, or lower alkyl;R.sub.3 is hydrogen or lower alkyl,R.sub.4 is hydrogen or methyl, andn is a number from 1.0 to 5.0,are useful as polymer-dissolving components in floor cleaners.

Abstract: A corrosion inhibited composition comprises an aqueous drilling, cutting, or polishing agent, an aqueous hydraulic fluid or an aqueous antifreeze compound; and an alkali metal salt, or an aliphatic amine salt of a mixture of 2- and 3-C.sub.6-12 -alkyladipic acids, the amount of this acid component being effective as a corrosion inhibitor.

Abstract: A process for preparing a methyl-blocked ethoxylate comprises heating at 180.degree.-320.degree. C., in the presence of a catalytically effective amount of a noble metal catalyst, an unsubstituted ethoxylate of 3 or more ethoxy units, or a monoalkyl-, monoaryl-, mono- or di-alkylamino- or mono- or di-arylamino ethoxylate of 2 or more ethoxy units, or a monoalkyl- or monoaryl-N,N-bis(ethoxylate) of 2 or more ethoxy units, all of which are derived from vicinal glycols, whereby there is prepared a corresponding methyl-blocked ethoxylate product which, for an unsubstituted ethoxylate starting material is a dimethylethoxylate having two fewer ethoxy units than the starting ethoxylate, and for the other ethoxylate starting materials, is a methylethoxylate having one less ethoxy unit in each ethoxylate group of the starting material.

Abstract: A homo- or copolymer of a 1,3-diene having reactive silyl groups bound thereto, and containing 0.4-12% by weight of bound silicon, prepared by reacting at a temperature of 150.degree.-300.degree. C., a 1,3-diene homo- or copolymer, having less than 1% of its aliphatic double bonds conjugated and having a molecular weight (M.sub.n) of 400-8,000, with a silicon compound of the formula ##STR1## wherein R is an unsaturated aliphatic hydrocarbon residue of 2-20 carbon atoms,X is halogen, C.sub.1-6 alkoxy, C.sub.1-6 alkoxyalkoxy, C.sub.6-12 aryloxy, C.sub.1-8 alkanoyloxy, C.sub.1-6 ketoximato or C.sub.1-8 hydrocarbylamido,Y and Z independently are one of the X groups, hydrogen, alkyl of 1-8 carbon atoms, cycloalkyl of 5-12 carbon atoms, or optionally substituted phenyl.

Abstract: A water-soluble polymer having quaternary ammonium groups, is prepared by reacting(a) a low molecular weight alkylating agent with(b) a corresponding polymer carrying tertiary, quaternizable amino groups.

Abstract: A process for the catalytic skeleton isomerization of n-alkenes to isoalkenes comprises contacting the n-alkene with a fluorinated aluminum oxide as the catalyst at temperatures of 250.degree.-550.degree. C., in the presence of 0.5-150% by weight of water, based on the weight of the alkene employed and replenishing the fluorine discharged from the catalyst in metered amounts, continuously or discontinuously, using, e.g., a volatile fluorine compound. The catalyst, partially deactivated by coking, is regenerated by burning it off with an oxygen-containing gas in the presence of steam.

Abstract: A process for preparing a copolymer by copolymerizing ethylene and at least one other 1-monoolefin and, optionally, and unconjugated diene in the presence of a mixed catalyst of (1) a compound of a metal of main Groups I-III of the periodic table having at least one hydrogen atom or an alkyl or aryl group bound to the metal atom, and (2) a compound of a metal of Subgroups IV-VI of the periodic table, comprises performing the copolymerization in the presence of an amount effective as an activator of a 2, 3,4,4-tetrachloro-2-butenoic acid ester of the fromulaHCCl.sub.2 --CCl=CCl--COORwherein R is an optionally halogenated alkyl, cycloalkyl, aryl, alkaryl or aralkyl group, and wherein the cycloalkyl, aryl, alkaryl or aralkyl groups are optionally substituted by one or more alkyl groups.