Abstract: Solids containing (i) on average per molecule at least two groups (a) having at least one bond which can be activated with actinic radiation whereby the groups (a) are structurally different from one another and are attached to the parent structure of the solid via urethane groups, or containing (ii) on average per molecule more than one group (a) having at least one bond which can be activated with actinic radiation, the groups being structurally different from one another or the same and being attached to the parent structure of the solid via urethane groups, and from 0.

Abstract: The invention relates to an anionically polymerised, impact-resistant polystyrene with a dispersed plasticiser phase, comprising particles with capsule particle morphology and method for production thereof.

Abstract: Oxidized waxes which are prepared by oxidizing polyolefins obtained by single-site catalysis of transition metal complexes from groups 5 to 8 of the Periodic Table of the Elements and have a molecular weight Mw in the range from 1000 to 40,000 g/mol.

Abstract: Disclosed is a method for the hydroformylation of olefins comprising 2 to 8 atoms, whereby a) an inflow containing olefins and a gas mixture containing hydrogen and carbon monoxide are fed into a reaction zone and reacted in the presence of a hydroformylation catalyst, b) the reaction product which is released from the raw hydroformylation product is redirected into the reaction zone during the extraction of a gaseous recovery flow. The inventive method is characterised in that c) the recovery flow is brought into intimate contact with a wash liquid in order to eliminate the unreacted olefins contained therein, the wash liquid being a vented hydroformylation product, and the olefin-charged wash liquid and the raw hydroformylation product are redirected for regeneration. Said inventive method enables unreacted olefins to be reclaimed to a large extent from the recovery flow.

Abstract: The present invention describes a process for preparing isophoronenitrile by adding HCN to isophorone. The catalyst used is CaO which has a BET surface area of >1.5 m2/g. The use of such a catalyst achieves high yields and selectivities.

Abstract: A mixture containing mixture one or more amines, water, low-boilers and high-boilers, is fractioned in a process wherein (i) low-boilers are separated from the mixture by distillation, (ii) high-boilers are separated from the mixture by distillation, (iii) the mixture is extracted with a sodium hydroxide solution to form an aqueous, sodium-hydroxide-containing first phase and an aqueous-organic, amine-containing second phase, and (iv) the aqueous-organic second phase is distilled to form an amine/water azeotrope and an essentially anhydrous amine, and the amine/water azeotrope is recycled to the extraction step (iii).

Abstract: Bisimine compounds of the formula (I) where the symbols are defined in the specification are used to prepare bisimidinato complexes which can be used in the polymerization of unsaturated compounds.

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: Propylene polymers contain a) from 50 to 95 parts by weight of a propylene homopolymer having a melt flow index of from 0.1 to 100 g/10 min., at 230° C. and under a weight of 2.16 kg, according to ISO standard 1133, and an isotacticity index of at least 98%, b) from 5 to 50 parts by weight of an ethylene copolymer containing from 4 to 40% by weight of polymerized C4-C20-alk-1-ene and having a density of from 0.865 to 0.920 g/cm3 and c) from 0 to 1.5 parts by weight of a nucleating agent, the sum of the parts by weight of the propylene homopolymer a) and of the ethylene copolymer b) always being 100 parts by weight. The propylene polymers are distinguished in particular by high rigidity and little tendency to white fracture.

Abstract: The continuous process for preparing a polyamide by reacting at least one aminonitrile with water comprises: (1) reacting at least one aminonitrile with water in the presence of an organic liquid diluent at from 90 to 400° C. and from 0.1 to 35×106 Pa in a flow tube containing a Brönsted acid catalyst selected from a beta-zeolite catalyst, a sheet-silicate catalyst or a titanium dioxide catalyst comprising from 70 to 100% by weight of anatase and from 0 to 30% by weight of rutile and in which up to 40% by weight of the titanium dioxide may be replaced by tungsten oxide, to obtain a reaction mixture, (2) further reacting the reaction mixture at from 150 to 400° C.

Abstract: A process for preparing bicyclic 1,3-diketones of the formula I where R1, R2, R3 and R4 are hydrogen, C1-C4-alkyl, C1-C4-alkoxy-carbonyl, halogen, cyano, nitro, C1-C4-alkylthio, C1-C4-alkylsulfenyl or C1-C4-alkylsulfonyl and Z is C1-C4-alkylene, O, S, N—R5 where R5 is C1-C4-alkyl or C1-C4-alkylcarbonyl, which comprises a) reacting a bicyclic olefin of the formula II with haloform in the presence of a base to give the ring-expanded product of the formula III  where R1-R4 and Z are as defined above and X is halogen; b) hydrolyzing the allylic halogen of the compound of the formula III to the allyl alcohol of the formula IV c) oxidizing the allyl alcohol of the formula IV to the unsaturated ketone of the formula V d) reacting the ketone of the formula V with a nucleophilic ion Y− which stabilizes a negative charge to give the ketone of the formula VI e) hydrolyzing the ketone of the formula VI to th

Abstract: Passivated iron useful as catalytically active component after activation is activated by hydrogen at elevated temperature and elevated pressure in the presence of a nitrile.

Abstract: A process for preparing polyamides comprises polymerizing starting monomers or starting oligomers in the presence of at least one compound of the formula (I) where R is a functional group R8 which bears 1-4 identical or different amide-forming groups R7, R1 is H, C1-C20-alkyl, cycloalkyl, benzyl or OR6, where R6 is H, C1-C20-alkyl, cycloalkyl or benzyl, R2, R3, R4 and R5 are independently C1-C10-alkyl, n is a natural number greater than 1, and the piperidine derivatives attached to R are identical or different with regard to the substituents, meaning R1, R2, R3, R4 and R5. The polyamides are useful for preparing filaments, fibers, films, sheetlike structures and moldings.

Abstract: A fiber containing a longitudinal core (I) of a polymer and a chemically different surrounding sheath (II), wherein said sheath (II) is based on a polyamide containing a sterically hindered piperidine derivative (III) attached to the polymer chain by chemical bonding.

Abstract: For producing homopolymers or copolymers of propylene in the gas phase, gaseous or liquid monomers are introduced into a polymerization zone; the pressure and temperature in the polymerization zone are kept within a range that corresponds to the gaseous state of the monomers; gaseous monomers not consumed by polymerization are discharged from the polymerization zone and liquefied and re-introduced in liquid form into the polymerization zone. The temperature regulation in the polymerization zone is done by means of continuous measurement of the temperature and a change, tripped upon a change in temperature, in the quantity of liquid monomers introduced per unit of time into the reaction zone. To that end, the temperature is measured at a plurality of points vertically offset from one another, and from the respective measured values a respective mean value is formed.

Abstract: Pigment concentrates comprising at least one pigment, a polyethylene wax prepared from one ethylene and, if desired, one comonomer using a metallocene catalyst, if desired a thermoplastic polymer and, if desired, additives can be used to color plastic moldings and plastic sheets.

Abstract: In a process for the continuous preparation of polybutylene terephthalate from terephthalic acid and 1,4-butanediol comprising: a) direct esterification of terephthalic acid with 1,4-butanediol in a reactor cascade comprising at least two reactors, b) precondensation of the esterification product obtained in stage a), and c) polycondensation of the precondensate obtained in stage b), the reaction pressure decreases and the temperature does not increase along the reactor cascade in stage a).

Abstract: Matt surfaces are obtained when a metal is coated electrolytically with zinc from an electrolyte solution which contains zinc sulfate or an alkanesulfonate of zinc or mixtures thereof, and optionally further metal salts, sulfuric acid or an alkanesulfonic acid or a mixture thereof, and at least one additive selected from nitrogen-containing surface-active compounds, which may be ionic or nonionic, sulfur-containing anionic surface-active compounds, and surface-active compounds based on multifunctional alcohols having at least three hydroxyl groups.

Abstract: Pigment preparations comprising A) at least one organic or inorganic pigment and B) at least one ethoxylated and propoxylated and/or butoxylated polyethyleneimine.

Abstract: A catalyst used in a process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of a hydrocarbon having at least four carbon atoms by means of oxygen-containing gases comprises a catalytically active composition comprising vanadium, phosphorus and oxygen and has a essentially hollow cylindrical structure in which (a) the ratio of the height h to the diameter of the continuous hole d2 is not more than 1.5 and (b) the ratio of the geometric surface area Ageo to the geometric volume Vgeo is at least 2 mm−1.