Abstract: The present invention relates to thermoplastic molding compositions comprising the following components: (A) at least one polyarylene ether (A1) having an average of at most 0.1 phenolic end group per polymer chain and at least one polyarylene ether (A2) having an average of at least 1.5 phenolic end groups per polymer chain, (B) at least one polyarylene sulfide, (C) at least one functionalized polyarylene ether comprising carboxy groups, (D) at least one fibrous or particulate filler, and (E) optionally further additives and/or processing aids. The present invention further relates to a process for producing the thermoplastic molding compositions of the invention, to the use of these for producing moldings, fibers, foams, or films, and to the resultant moldings, fibers, foams, and films.

Abstract: The invention relates to processes for producing thermoplastic molding compositions, where the thermoplastic molding compositions comprise a) as component A, from 3 to 79% by weight of one or more (methyl)styrene-acrylonitrile copolymers, which have no maleic-anhydride-derived units.

Abstract: The invention relates to thermoplastic molding compositions comprising A) from 55 to 98% by weight of at least one vinylaromatic copolymer impact-modified with a particulate graft rubber, B) from 1 to 44% by weight of a flame retardant comprising B1) an expandable graphite, B2) a phosphorus-comprising flame-retardant compound, and B3) a fluorine-comprising polymer, C) from 1 to 20% by weight of a non-particulate rubber comprising polar groups, and D) from 0 to 40% by weight of further additives, where the percentages by weight are in each case based on the total weight of components A) to D) and give a total of 100% by weight, and also to processes for the preparation of these molding compositions, to the use of these molding compositions for the production of moldings, of fibers, of foams, or of foils, and also to the resultant moldings, fibers, foams, and foils.

Abstract: A mixture which comprises a) from 5 to 95% by weight of a copolymer A which comprises one or more copolymer blocks (B/S)A each composed of from 65 to 95% by weight of vinylaromatic monomers and from 35 to 5% by weight of dienes and of a glass transition temperature TgA in the range from 40° to 90° C., b) from 95 to 5% by weight of a block copolymer B which comprises at least one hard block S composed of from 95 to 100% by weight of vinylaromatic monomers and of from 0 to 5 by weight of dienes, and comprises one or more copolymer blocks (B/S)A each composed of from 65 to 95% by weight of vinylaromatic monomers and of from 35 to 5% by weight of dienes and of a glass transition temperature TgA in the range from 40° to 90° C., and comprises one or more copolymer blocks (B/S)B each composed of from 20 to 60% by weight of vinylaromatic monomers and of from 80 to 40% by weight of dienes and of a glass transition temperature TgB in the range from ?70° to 0° C.

Abstract: A process for the production of insecticide-modified bead material composed of expandable polystyrene (EPS) by extrusion, encompassing the steps of a) mixing, in a mixer, to incorporate a blowing agent and at least one insecticide from the group of the phenylpyrazoles, chlorfenapyr and hydramethylnon into a polymer melt which comprises at least one polystyrene, based on a vinylaromatic monomer, b) discharging the polymer melt comprising blowing agent, and c) pelletizing the polymer melt comprising blowing agent.

Abstract: Process for producing cellulose beads or lignocellulose beads, wherein cellulose or lignocellulose is dissolved in a solvent which comprises more than 50% by weight of the symmetrical imidazolium compound of the formula I below where R1 and R3 are each an identical organic radical having from 2 to 20 carbon atoms, R2, R4 and R5 are each an H atom, X is an anion and n is 1, 2 or 3, and cellulose beads or lignocellulose beads are produced from the solution obtained, and also the use of the beads obtained for petroleum or natural gas recovery.

Abstract: Insecticide-modified bead material composed of expandable polystyrene (EPS) coated with (A) one or more insecticides (B) one or more glycerol esters (C) if desired, one or more binders, and (D) if desired, further additives.

Abstract: The invention relates to a process for the preparation of thermoplastic molding materials comprising A) from 39 to 99% by weight of at least one thermoplastic polymer, B) from 1 to 60% by weight of a flameproofing component comprising B1) an expandable graphite, and C) from 0 to 60% by weight of further additives, the percentages by weight being based in each case on the total weight of the components A) to C) and together giving 100% by weight, by mixing melts of the components A), B) and, if present, C) in a screw extruder, the screw extruder comprising at least one metering zone, one plasticating zone, one homogenization zone and one discharge zone in this sequence along the conveying direction, wherein the metering of the expandable graphite B1) into the screw extruder is effected at a point behind which—viewed in the conveying direction—the extruder screw comprises substantially no shearing elements, and thermoplastic molding materials which can be prepared by these processes, the use of said the

Abstract: The present invention relates to a process for producing spherical particles of at least one material, which comprises the steps: (A) preparation of a solution or dispersion of the at least one material in at least one water-miscible solvent or dispersion medium, (B) conversion of the solution or dispersion obtained in step (A) into individual portions comprising an amount of the at least one material corresponding to the amount present in the spherical particles by underwater pelletization and (C) introduction of the portions obtained in step (B) into a medium which is miscible with the solvent or dispersion medium from step (A) and in which the material used in step (A) is insoluble so that the solvent or dispersion medium used in step (A) is replaced by the medium which is miscible with the solvent or dispersion medium from step (A) and the material solidifies to form the spherical particle.

Abstract: A rotor/stator apparatus is proposed, with a bearing block, a casing (1), a rotor shaft mounted therein, on whose end directed toward the casing a rotor designed with a conical surface has been secured, there being a stator (2) secured within the casing and concentrically associated with the rotor, where those surfaces that face toward one another of the rotor (2) and of the stator (3) form a gap upstream of which there is an axial feed neck and downstream of which there is a radial outlet neck, where rotor and stator have been mounted so as to be capable of axial shift in order to form a gap with adjustable gap width, wherein one or more holes extending to the exterior has/have been provided in the region of the feed aperture of the rotor/stator apparatus in the feed line prior to and very close to the rotor/stator apparatus and/or in the casing (1) and/or in the stator (2), and alongside the outlet aperture at least one further hole has been provided in the annular space around the shear gap.

Abstract: A process for preparing copolymers in solid form, where the copolymers are obtained by free-radical polymerization of a mixture of 30 to 80% by weight of N-vinyllactam, 10 to 50% by weight of vinyl acetate and 10 to 50% by weight of a polyether in the presence of at least one solvent, with the proviso that the total of i), ii) and iii) equals 100% by weight, which process comprises removing the solvent from the polymerization mixture with the aid of an extruder.

Abstract: The present invention relates to thermoplastic molding compositions comprising a mixture of (A) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a methyl methacrylate polymer, (B) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a copolymer obtainable by polymerizing a styrenic monomer and a vinyl cyanide, and (C) from 1 to 40% by weight, based on the sum of components (A), (B) and (C), of a graft copolymer obtainable from (C1) from 60 to 90% by weight, based on (C), of a core obtainable by polymerizing a 1,3-diene and a styrenic monomer, (C2) from 5 to 20% by weight, based on (C), of a first graft shell, and (C3) from 5 to 20% by weight, based on (C), of a second graft shell composed of an alkyl (meth)acrylate polymer, with the proviso that the ratio of (C2) to (C3) is in the range from 2:1 to 1:2.

Abstract: Solid mixtures of a reactive size and starch, which are obtainable by mixing at least one reactive size with at least one starch in a melt in the presence of at least one destructuring agent for starch under the action of shear forces at from 65 to 250° C. and cooling the melt to room temperature, are used in the form of aqueous dispersions as process assistants in papermaking.

Abstract: The present invention relates to a mixing apparatus at least composed of a screw-based machine S1 and a screw-based machine S2, where S1 has heating equipment, at least in the plasticizing and homogenizing zone, and where the outlet from S2 has been connected to the screw-containing barrel of S1, within the plasticizing or homogenizing zone of S1, a substantive feature of which is that the connection between S1 and S2 is brought about by a connector which has cooling equipment effective as far as the inner wall of the screw-containing barrel of S1, and to a process for preparing thermoplastically processable molding compositions, in particular additive masterbatches, from at least one thermoplastic component C1 and at least one component C2, where the melting point or decomposition temperature TMC2 of C2 is lower, by at least about 50° C., than the temperature THC1, which is the lower limit of the thermoforming range of C1, and where most of C2 is melted only after contact with C1.

Abstract: A polybutadiene latex is prepared by a process in which butadiene is polymerized by free radical emulsion polymerization in the presence of initiator and, if required, dispersants and further conventional assistants, the polymerization being carried out in the presence of reactive comonomers in such a way that the heat flow of 43 watt/kg solids content of the polymerization mixture is not exceeded. Owing to the presence of reactive comonomers, the reaction rate at the beginning of the reaction is increased, with the result that an overall flatter heat flow profile is obtained. A preferred reactive comonomer is styrene.

Abstract: The graft copolymer made from a1: from 10 to 90% by weight of a particulate graft base A1, made from a particulate emulsion polymer with a glass transition temperature below 0° C.

Abstract: Thermoplastic molding materials containing the following ingredients with regard to components A-F: A) 5-70 wt. % of at least one graft copolymer A) consisting of a rubber elastic base with a glass transition temperature below 0° and a grafted overlay made of a styrene compound and acrylonitrile or methacrylonitrile or mixture thereof in addition to, optionally, other monoethylenically unsaturated monomers, B) 29-90 wt. % of a hard copolymer made of at least one styrene compound, acrylonitrile or methacrylonitrile or mixtures thereof and, optionally, other monoethylenically unsaturated monomers, C) 0-5 wt. % of at least one three-block copolymer X-Y-X with a middle block Y propylenoxide units and terminal block X made of ethyleneoxide units, D) 0.01-5 wt. % of at least one butylated reaction product of cresol with dicyclopentadiene, E) 0.01-5 wt. % of at least one thiocarboxylic acid ester, F) 0.01-5 wt.

Abstract: Undesirable changes in shade brought about by low temperatures (Cold Stress Whitening) in impact-modified thermoplastic molding compositions F which comprise at least one elastomeric graft polymer A and at least one thermoplastic polymer B are reduced by adding from 10 to 200 ppm, based on the molding compositions F, of at least one polyorganosiloxane S to the impact-modified thermoplastic molding composition F.

Abstract: The invention relates to a method for producing caoutchouc particles (K) by means of emulsion polymerisation in the presence of an emulsifier and a polymerisation initiator. Said particles contain A) 80 to 100 wt. % of one or more conjugated diene monomers (A) in relation to (K) and B) 0 to 20 wt. % of one or more monoethylenically unsaturated comonomers (B) in relation to (K) in the polymerised form. The inventive method is characterised in that 1) a mixture (M1) containing water and an emulsifier is provided, 2) a mixture (M2) containing one or more monomers in the monomer or polymerised form selected from styrole, &agr;-methylstyrole, butadiene, n-butylacrylate, MMA and acrylnitrile and optionally comonomers is added, 3) polymerisation of the obtained mixture starts in the presence of a polymerisation initiator at temperature of 5 to 95° C., 4) a mixture (M3) containing 0 to 100 wt. % of the comonomers (B) in relation to (B) and 0 to 25 wt.

Abstract: The present invention relates to thermoplastic molding compositions based on ASA (acrylonitrile-styrene-acrylate) with improved flowability and improved extrusion properties. The invention further relates to a process for preparing these thermoplastic molding compositions, their use and also, produced therefrom, reduced-gloss and antistatic films and moldings, and coatings with reduced gloss, and the use of these.