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: For the preparation of pure, anhydrous cyclic imido esters, nitriles are reacted with amino alcohols with splitting off of ammonia at temperatures of 90.degree.-230.degree. C. under a pressure of 1.1-10 bar. The catalysts employed are metallic compounds. The process results in substantially shorter reaction times.

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: Improved molding compositions based on high-molecular polyether ester amides are obtained by heating at 180.degree.-250.degree. C. a melt containing a mixture ofA. a polyether ester amide having a relative solution viscosity .eta..sub.rel of at least 1.5; andB. 0.05-1.5 parts by weight, based on 100 parts by weight of the molding composition, of a cyclic, trimerized isophorone diisocyanate or an oligomer thereof having a degree of oligomerization of 2-5 and an isocyanate functionality of 3-7.

Abstract: 2- and 4-tert-butylcyclohexanols are produced having high proportions of cis-isomers, by hydrogenating the corresponding tert-butylphenols in the presence of Pd and Ru catalysts in two stages under hydrogen pressures of above 200 bar and at temperatures of 70.degree.-280.degree. C. In the first stage, a Pd catalyst is employed, and a Ru catalyst is used in the second stage.

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: A process for extracting extensively emulsion-free oil from a subterranean deposit, the formation water of which has a medium or high total salinity and has a relatively low alkaline earth metal ion concentration, comprising injecting into an injection well therein a 1-20% strength aqueous tenside solution or dispersion in formation water of a mixture of 10-90% of carboxymethylated ethoxylates of the formulaR--(OCH.sub.2 CH.sub.2).sub.n --OCH.sub.2 --COOMand 90-10% of ethoxylates of the formulaR--(OCH.sub.2 CH.sub.2).sub.n --OH,whereinR is a linear or branched hydrocarbon aliphatic group of 4-20 carbon atoms or an alkylphenyl group of 1-14 carbon atoms in the alkyl group,n is 3-15, andM is an alkali or alkaline earth metal ion or ammonium, wherein alkaline earth metal ions are contained in the tenside solution or dispersion in such a concentration that the phase inversion temperature of the system:crude oil/formation water/tenside solution or dispersion, lies at most 10.degree. C.

Abstract: A naphtha-soluble, hydrogenated C.sub.1-4 -alkyl C.sub.6-10 -aryl ketone/formaldehyde resin, having an oxygen content of at least 6% by weight and a softening point of at least 70.degree. C. can be produced by a process comprising the step of hydrogenating a C.sub.1-4 -alkyl C.sub.6-10 -aryl ketone/formaldehyde resin under a hydrogen pressure of at least 200 bar and a temperature of 140.degree.-300.degree. C., in the presence of a nickel, palladium, palladium/copper or palladium/nickel catalyst. These resins are useful, for example, as additives to improve the hardness of varnishes and other coatings.

Abstract: A process for producing vinyl chloride polymers and copolymers by suspension polymerization is carried out in the presence of small amounts of ethylene/vinyl acetate copolymers with a vinyl acetate content of 38% by weight to 55% by weight and with a viscosity number of 95-210 ml/g, the catalyst being added to the polymerization charge in dissolved form. The resultant polymers are suitable for lowering the viscosity of polyvinyl chloride plastisols.

Abstract: Quadratic acid bisamides and salts thereof having the formula I are effective stabilizers of synthetic resins, especially for imparting resistance to deterioration resulting from exposure to light ##STR1## wherein R.sub.1 is H, C.sub.1-12 alkyl or OH-substituted C.sub.2-12 alkyl; R.sub.2 is --(CH.sub.2).sub.m --O--.sub.n, wherein m is an integer of 2-6; n is 0 or 1;R.sub.3 is H, CH.sub.3, CH.sub.2 --CH.sub.2 --OH, CH.sub.2 --COOH or CH.sub.2 --CH.sub.2 --COOH;HX is an acid equivalent of an unsubstituted or substituted monobasic, dibasic or polybasic organic acid of not more than 20 carbon atoms, or of sulfuric or phosphoric acid; and0.ltoreq.p.ltoreq.2.

Abstract: Highly transparent, impact-resistant molded articles can be produced from a molding composition, comprising: (1) a major portion of polyvinyl chloride or a copolymer comprising at least 70% by weight of vinyl chloride units; and (2) an amount effective to impart impact resistance of: (a) at least one homopolymer of an acrylate monomer having the formula ##STR1## wherein R is a straight-chain or branched alkylene residue of 3-8 carbon atoms, optionally interrupted by 1-2 ether oxygen atoms, wherein the straight-chain portion of said alkylene residue contains at least 3 carbon atoms; or (b) a copolymer of said acrylate monomer and up to 30% by weight of at least one acrylate ester of a C.sub.4-12 aliphatic alcohol.

Abstract: Vinyl chloride polymers and copolymers are produced by suspension polymerization in the presence of a small amount of specific ethylene-vinyl acetate copolymers. The catalysts, the ethylene-vinyl acetate copolymer, and the monomer or monomer mixture are added to the polymerization charge before the suspension agent. The resultant polyvinyl chloride is especially suitable for lowering the viscosity of polyvinyl chloride plastisols.

Abstract: A molding composition having cold impact strength and amenable to thermoplastic processing, comprises(A) 66-95% by weight of polybutylene terephthalate with a viscosity number (J) of 70 to 240 cc/g and(B) 34-5% by weight of a reaction product of1. 99-75% by weight of an ethylene/.alpha.-olefin/diene terpolymer having a Mooney viscosity in the range from 30 to 130 and2. 1-25% by weight of bicyclo[2,2,2]-2,3;5,6-dibenzooctadiene-(2,5)-dicarboxylic acid-(7,8)-anhydride.

Abstract: A method for obtaining a positive bond between articles painted or coated with thermosets and concrete, involves treatment of the surface with an epoxy resin-cement mortar mixture containing an epoxy resin emulsion of the composition(a) a liquid epoxy resin;(b) water;(c) an emulsifier comprising a primary, aliphatic alcohol, an adduct thereof with ethylene oxide or, optionally, a polyglycol ester of a carboxylic acid; and(d) a latent curing agent comprising a reaction product of the essentially complete neutralization of a diamine of the formulaeH.sub.2 N--CH.sub.2 --R--NH.sub.2orH.sub.2 N--R--CH.sub.2 --R--NH.sub.2with oxyalic acid,wherein R is alkyl substituted alkylene or cycloalkylene; or the reaction product obtained by complete neutralization with oxalic acid of (i) a polyamine of the formulaH.sub.2 N--CH.sub.2 --CH.sub.2 --NH--.sub.x Hwherein x=2, 3, or 4, or of (ii) a reaction product, containing amino groups, of such a polyamine with a fatty acid.

Abstract: A process for the silylation of unsaturated, naturally occurring oils or the interesterification products thereof, comprises reacting the unsaturated, naturally occurring oils or the interesterification products thereof, at a temperature of 200.degree.-350.degree.C. under inert gas, with silicon compounds of Formula I ##STR1## wherein R is hydrogen or an unsaturated aliphatic hydrocarbon residue of 2-6 carbon atoms,X is a hydrolyzable residue, andY and Z independently are one of the X groups, alkyl of 1-8 carbon atoms, cycloalkyl of 5-12 carbon atoms, or optionally substituted phenyl.

Abstract: In the isomerization of isolated double bonds to conjugated double bonds in optionally substituted cyclooctadienes, the isomerization catalyst comprises: (a) a transition metal compound of the formula Me(OR.sup.1).sub.4, wherein Me is Ti, Zr, or Hf, and R.sup.1 is C.sub.1-4 alkyl, and (b) an organoaluminum compound of the general formula AlR.sup.2.sub.3-n X.sub.n, wherein R.sup.2 is C.sub.1-4 alkyl, n is 0, 1, 2, or a fraction between 1 and 2, and X is halogen or, if n is 1, also hydrogen; the molar ratio of (a):(b) being in the range from 0.1 to 1:1, the catalyst having prolonged activity and the isomerization being conducted at a temperature of 50.degree.-200.degree. C.

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