Abstract: A thermoplastic molding composition is described comprising a) from 20 to 99% by weight of a thermoplastic polymer other than a polyoxymethylene homo- or copolymer, from 0.1 to 80% by weight of a filler and/or reinforcing material, and c) 0.00001 to 1.0% by weight of a catalyst which catalyzes the formation of covalent bonds between the thermoplastic polymer and the surface of the additive. The inventive molding compositions have improved properties.

Abstract: A process for preparing olefin homopolymers or copolymers by polymerization of at least one olefin in a hydrocarbon (mixture) in the presence of a molar mass regulator, a mixed catalyst and a substance which increases the electrical conductivity of the hydrocarbon (mixture) and is soluble in the hydrocarbon or the mixture of hydrocarbons or which reacts with components of the mixed catalyst, wherein the mixed catalyst is obtainable by reaction of a magnesium alkoxide with titanium(IV) halide and comprises titanium in the oxidation states four and three and also an organic aluminum compound, where the molar ratio of Ti(IV) to Ti(III) is from 100:1 to 1:100. The process makes it possible to prepare, in particular, polyethylenes having an ultrahigh molecular weight. The formation of deposits on the walls during the polymerization is significantly reduced.

Abstract: The present invention relates to a process for preparing a catalyst, a novel polymer and a process for preparing the polymer. In particular, the invention provides a process for preparing a homopolymer and/or copolymer having an irregular particle structure and a melt flow index (MFR 190/15) of from 1.3 g/10 min to 10 g/10 min, a molecular weight distribution Mw/Mn of from 3 to 30, a bulk density of from 0.05 g/cc to 0.4 g/cc and a particle size of from 5 ?m to 300 ?m, which comprises polymerizing the monomers in the presence of a mixed catalyst comprising a titanium component and an organic aluminum compound and the presence of a molar mass regulator.

Abstract: Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose An apparatus is described for preparing polyoxymethylene homo- and copolymers. This has the following elements: A) reactor (1) encompassing a polymerization zone (2) and a deactivation zone (3) directly downstream thereof for polymerizing and deactivating polyoxymethylene homo- and copolymers in a homogeneous phase in a manner known per se, B) depressurizing assembly (4), which, if appropriate, has a metering apparatus (5) for additives for the polymer, C) pelletizer (6), D) extraction apparatus (7), and E) if appropriate, a drying apparatus (8). Use of the apparatus and of the polymerization process carried out therein can achieve particularly low residual monomer contents in a simple manner which saves energy.

Abstract: The invention relates to a sealable, multilayer, coextruded packaging film with high transparency and high tensile strength. The film is composed of at least one core layer A made from a polyolefin with high tensile strength together with low elongation, and of outer layers B and C arranged on the two sides. The core layer A comprises from 50 to 100 % by weight of cyclic olefin polymer (COC) having a Tg of at least 60 ° C. The outer layers B and C may comprise at least one sealable polymer and one functional polymer. Intermediate layers may be arranged between layer A and layers B and C improving adhesion between layers. This film has a total thickness in the range from 20 to 200 ?m, the core layer A making up from 5 to 60% of the total thickness of the film. The film is used in “flow-pack” packages produced on form-fill seal machines, or as a cover film on thermoformed blister packages or on cups (lidding).

Abstract: Compositions are described comprising a) polyoxymethylene, b) thermoplastic elastomer having active hydrogen atoms, c) polyoxymethylene which differs from component a) and contains active hydrogen atoms, d) reagent for covalent coupling of components b) and c), and e) if appropriate, another impact modifier, which differs from component b). The compositions feature improved toughness and can be used for production of moldings.

Abstract: A pultrusion process is described, in which a strand composed of a multifilament-reinforced first thermoplastic molding composition is produced, sheathed by a layer composed of a second thermoplastic molding composition. The first molding composition here comprises a catalyst which catalyzes the formation of covalent bonds between the thermoplastic polymer and the surface of the multifilaments, and, where appropriate, comprises other additives which do not adversely affect the activity of the catalyst, and the second thermoplastic molding composition comprises additives.

Abstract: Multiblock copolymers are described and contain the structural unit of formula I -A-O—R1—O—CO—(R2—CO—)m—X-D-X—(CO—R2)m—CO—X—??(I), where A is a radical derived from a homo- or copolyoxymethylene, R1 is an alkylene radical having at least two carbon atoms, or a cycloalkylene radical, R2 is a direct carbon-carbon bond, or an alkylene, cycloalkylene, arylene, or aralkylene radical, X is selected from —O—, —S—, or —NH—, D is a divalent radical B which is a radical of a hydroxy-terminated, mercaptan-terminated, or amino-terminated polymer which derives from polyalkylene glycols, from polyvinyl ethers, from polyvinyl ether copolymers with alkenes, from polyvinyl esters, from polyvinyl ester copolymers with alkenes, from polyvinyl alcohols, or from polyvinyl alcohol-alkene copolymers, from polyvinylaromatics, from polyacrylates, from polymethacrylates, from polyacetals which have no, or up to 50 mol % of, oxymethylene units, from polycarbonates, from polyesters, from polyamides, from polyimines, from polyether

Abstract: Described are fibers comprising a polyoxymethylene copolymer having an ISO 1133 MVR melt index (determined at 190° C. under a load of 2.16 kg) in the range from 0.3 to 30 ml/10 min which possess a bend recovery (measured by the double loop method in air and/or water) of not less than 125°. These fibers are useful in brushes.

Abstract: A process for preparing acetals from aldehydes and alcohols is carried out by generating a reaction/distillation zone charged with an acidic fixed bed catalyst in a distillation column, feeding the aldehyde and the alcohol to the reaction/distillatlon zone and at least partly converting them to the acetal, heating the column bottom disposed below the reaction/distillation zone in order to at least partly evaporate the bottom's mixture and to establish a defined temperature in the reaction/distillation zone, feeding an extractant into a rectifying section of the column, disposed above the reaction/distillation zone and condensing a product having more than 90% by weight of acetal at the top of the column.

Abstract: The present invention relates to a polyoxymethylene molding composition comprising: (A) from 0.1 to 5.0% by weight of a compatibilizer, (B) from 5 to 50% by weight of an impact modifier, (C) the remainder to 100% by weight of a polyoxymethylene. The molding compositions of the invention have substantially improved mechanical properties, in particular impact resistance.

Abstract: A toner for development of an electrostatically charged image, said toner comprising a binder resin, a colorant, a function imparting agent, and a charge control agent, wherein said binder resin at least contains a polyolefin resin having a cyclic structure, said polyolefin resin is composed of a resin or resin fraction having a number average molecular weight (Mn), as measured by GPC, of less than 7,500 and a resin or resin fraction having said number average molecular weight of 7,500 or more, and in said polyolefin resin having a cyclic structure, a resin or resin fraction having an intrinsic viscosity (i.v.) of 0.25 dl/g or more, and a number average molecular weight (Mn) of 7,500 or more and a weight average molecular weight (Mw) of 15,000 or more, as measured by the GPC method, is contained in a proportion of less than 50% by weight based on the entire binder resin.

Abstract: The present invention relates to a novel polymer as binder for producing activated carbon filters. The polymer of the invention is a polyethylene homopolymer and/or copolymer having a melt flow index (MFI 190/15) of from 1.2 g/10 min to 10 g/10 min, a polydispersity Mw/Mn of from 3 to 30, a bulk density of from 0.05 g/cm3 to 0.5 g/cm3 and a particle size from 5 ?m to 300 ?m.

Abstract: The present invention relates to a process for producing a bimodal or multimodal mixture of amorphous polyolefins having a different molar mass, in which at least one amorphous polyolefin having a high molar mass is brought into contact and mixed with at least one amorphous polyolefin having a low molar mass in solution and the solvent is subsequently removed.

Abstract: The present invention relates to a process for the preparation of acetal polymers, in particular of polyoxymethylene (POM) by cationic polymerization where organophosphonic and/or organophosphinic acids and/or their derivatives and/or their precursors are used as the initiator.

Abstract: The invention relates to a multilayer polyolefin film composed of at least three layers, comprising a) a core layer A functioning as base layer and composed of at least one amorphous polyolefin or of a mixture of at least one semicrystalline polyolefin and 5.0% by weight or more of at least one amorphous polyolefin and b) on the two sides, outer layers B and C, which are identical or different, composed of a polyolefin (polyethylene, polypropylene) and/or a mixture composed of polypropylene and of an amorphous polyolefin. The films of the invention have very good thermoformability together with low shrinkage. The chemical structure of the core layer A gives exceptionally low water absorption and superior barrier action with respect to water vapor. The invention further relates to the use of this film and to a process for its production.

Abstract: The invention relates to a process for preparing trioxane from aqueous formaldehyde solutions in the presence of acidic catalysts. The reaction of the formaldehyde to give trioxane takes place in a reaction column equipped with a circulation evaporator, and the formaldehyde solution used as the starting solution is mixed with a sidestream from the bottom of the reaction column and fed to the upper section of the reaction column via a tubular reactor. The process is notable for a low energy requirement and little by-product formation.

Abstract: Copolymers are described containing blocks of the structural repeat units of the formula I and blocks containing structural units of the formula II [—O—CH2—]x,??(I) [—O—R1—],??(II) where R1 is a divalent radical derived from a hydroxy-terminated aliphatic or cycloaliphatic oligomer or polymer which, where appropriate, has ether groups and/or carbonyloxy groups in the chain, and x is a whole number, at least 10. The copolymers may be used for producing moldings.

Abstract: A process for producing packaging composed of thermoformable film composed of thermoplastic polyolefins provides the thermoforming of the film at temperatures in the range from 70 to 170° C., thus giving packaging which has a high heat distortion temperature in the range from 60 to 200° C. and which has a high water-vapor barrier. The thermoformable film comprises an amount in the range from 5 to 100% by weight of COC with a glass transition temperature Tg in the range from 65 to 200° C.

Abstract: A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the initiator is dissolved in the formaldehyde dialkyl acetal before admixing to the trioxane and the comonomers.