Abstract: Catalyst system, suitable for the (co)polymerization of ethylene and optionally minor amounts of 1-alkenes and/or dienes at a temperature of at least 180.degree. C., to be prepared by combining at least two components A and B, which components comprise:A: one or more titanium compounds, one or more vanadium compounds, one or more aluminium compounds, one or more magnesium compounds and optionally one or more halogen compounds, in such amounts that the atomic ratio of magnesium to the sum of titanium and vanadium is between 0 and 10, the atomic ratio of aluminium to the sum of titanium and vanadium is at least 3, the atomic ratio of aluminium to magnesium is at least 1, and the atomic ratio of halogen to magnesium is at least 2,B: one or more organoaluminium compounds, which two components are, separately or in combination, supplied direct to the polymerization vessel.

Abstract: The invention relates to the application of a resin composition containing(1) 20-85 parts by weight of an alkoxy groups containing polymer consisting of(a) 1-40 wt. % (C.sub.1 -C.sub.6) alkoxymethyl ether of acryl- or methacrylamide(b) 20-85 wt. % (C.sub.1 -C.sub.12) alkyl esters of acrylic or methacrylic acid(c) 0-40 wt. % hydroxyalkyl(meth)acrylate, acrylic or methacrylic acid, acryl- or methacrylamide or mixtures thereof(d) 0-50 wt. % vinylaromatic compound and(e) 0-40 wt. % other monomers(2) 0-80 parts by weight of hydroxy, carboxy or amide containing polymer and(3) 15-60 parts by weight of organic solvents in a coating material curing at room temperature.

Abstract: The invention relates to a process for preparing a cycloalkanone and/or cycloalkanol by oxidation of a cycloalkane using oxygen to form a hydroperoxide, followed by a decomposition of the hydroperoxide, in the presence of an organic metal complex, the decomposition being carried out in the presence of a phthalocyanine or porphyrin metal complex immobilized on a carrier material.

Abstract: An ultrastretchable polymer material is prepared starting from polyolefine particles with a low entanglement density and a weight average molecular weight (M.sub.w) higher than 400,000, the particles being densified to a coherent material together with a process auxiliary material at an elevated temperature, but below the melting point of the pure polyolefine.From this ultrastretchable material, objects with a high tensile strength and a high modulus can be produced by stretching it, for instance, at a temperature which is at most 70.degree. C. below the temperature at which the polyolefine melts under the prevailing conditions, if desired after removal of the process auxiliary agent present in it.

Abstract: The present invention relates to an orientated polyolefin composition comprising an olefin (co)polymer having a weight average molecular weight (Mw) from 30,000 to 1,000,000 and a high molecular weight tail extending to molecular weights above 1,000,000, and has a microstructure which is substantially parallel chain extended cores of the component polymer(s) and associated lamellar overgrowths extending in planes normal to the cores. The lamellar overgrowths an adjacent cores intermesh and are capable of sustaining a haul off tension of at least 10 MPa without breaking during its extrusion.The orientated polyolefin composition is produced by extruding an olefin copolymer through a die under a pressure of about 5-10 MPa, at a temperature above the self-blocking temperature thereof and by hauling off the extrudate at a tension of at least 10 MPa without breaking. The extrudates so produced have a high modulus.

Abstract: The invention relates to a melt-processible aromatic (co)polymer composition containing:1-99 wt. % of a liquid crystalline polymer, and99-1 wt. % of a polymer derived from units, capable of forming a liquid crystalline polymer, and from one or more triazine units according to the formula (I) ##STR1## where R.sub.1 is an amino group, R.sub.2 and R.sub.3 is an (alkyl)carboxyl-, an (alkyl)hydroxy- and/or an amino group.Besides excellent mechanical properties, the (co)polymer composition according to the invention possesses an improved thermal shock resistance. The (co)polymer composition is eminently suited for use in objects for the electrical industry and the aircraft industry.

Abstract: The invention relates to the preparation of a benzaldehyde by hydrogenation of a corresponding benzoic acid in the gas phase in the presence of a manganese containing catalyst on an acid carrier. The invention is characterized in that use is made of a catalyst prepared by:(a) coprecipitation, at a pH between 7 and 10, of a manganese salt and a salt from which an acid carrier is formed,(b) subsequent calcination at a temperature between 300.degree. and 700.degree. C.,(c) followed by reduction with a hydrogen containing gas mixture.Preferably the catalyst contains oxides of aluminum, zirconium, titanium, hafnium and/or niobium.

Abstract: The invention relates to a process for injection molding articles having a number of layers of different plastic materials that are sequentially and/or coaxially injected, in plasticized form, into a mould. Prior to injection, the different plastic materials are brought into a hollow chamber in a preselected order and amounts, with the aid of separate injection units or by means of a distributor, which is made of elementary modules, each of which is capable of creating a certain combination and configuration of plastic materials in the chamber. The contents of the chamber are then injected into the mould.

Abstract: The invention relates to the application of a resin composition containing(1) 20-85 parts by weight of an alkoxy groups containing polymer consisting of(a) 1-40 wt. % (C.sub.1 -C.sub.6) alkoxymethyl ether of acryl- or methacrylamide(b) 20-85 wt. % (C.sub.1 -C.sub.12) alkyl esters of acrylic or methacrylic acid(c) 0-40 wt. % hydroxyalkyl(meth)acrylate, acrylic or methacrylic acid, acryl- or methacrylamide or mixtures thereof(d) 0-50 wt. % vinylaromatic compound and(e) 0-40 wt. % other monomers(2) 0-80 parts by weight of hydroxy, carboxy or amide containing polymer and(3) 15-60 parts by weight of organic solvents in a coating material curing at room temperature.

Abstract: The invention relates to a process for producing a formed article substantially consisting of tubular elements by placing these elements close together and connecting them with each other and is characterized in that elements having, between them, different properties are placed together. The chosen property may be, for instance, length, thickness, or type of material. The invention also relates to the formed article obtained.

Abstract: The invention relates to films of polymers of high molecular weight, which have been obtained by casting polymers dissolved or swollen in solvents and partially contain stiffened segments, which films serve either for decorative, handling or fixing purposes or allow, especially when formed on the film edges, a particularly ultrahigh stretching of the films without excessive formation of lips.

Abstract: The invention relates to a process for the treatment of surfaces of highly oriented polyolefin objects, obtained by converting a solution or melt of a linear polyolefin with a weight average molecular weight of at least 400.000 g/mol, at a temperature above the dissolution temperature, respectively above the melting temperature, into a shaped object, converting this object into a gel-object by cooling, and stretching the gel-object at elevated temperature optionally after full or partial removal of the solvent, in which the surface of the object is contacted with a solution of a radical-forming compound and that the object is then exposed to a temperature of at least 30.degree. C. for at least 1 minute.

Abstract: Process for contacting a particulate solid phase and a liquid in a column, which solid phase and liquid interact with each other, in which process the column is filled with packing material that is inert in respect of the solid phase and the liquid, in that the solid phase and the liquid are contacted countercurrently, and in that the liquid is subjected to pulsation.

Abstract: The invention is concerned with a process for removing mercury from a non-polar organic medium like a liquid hydrocarbon mixture, most preferably a natural gas condensate, by contacting the medium to be treated with a solid adsorbent, preferably an ion-exchange resin, containing active thiol-groups. By this method it is possible to remove mercury from the treated medium in an amount of more than 97%.

Abstract: A process is disclosed for producting thin stretched films having a thickness between 0.1 and 20 .mu.m from polyolefins of ultrahigh molecular weight by dissolving the polyolefin in a solvent, shaping the solution at a temperature above the solution temperature of the polyolefin to a tape, cooling the tape to a temperature below the solution temperature to obtain gelation and stretching the gelled tape. In this process the gelled tape is initially subjected to a preliminary orientation in one direction, under solvent removal, and is then stretched in a direction essentially perpendicular to the direction of preliminary orientation, at elevated temperature, followed by final stretching to obtain the finished thin films. This process makes possible the production of films which are free from pores, that is to say transparent and which posses high Young's moduli, high tensile strengths and favorable values for elongation at break.

Abstract: An orientated polyolefin composition comprising an olefin (co)polymer having a weight average molecular weight (Mw) from 30,000 to 1,000,000 and a high molecular weight tail extending to molelcular weights above 1,000,000, and has a microstructure which is substantially parallel chain extended cores of the component polymer(s) and associated lamellar overgrowths extending in planes normal to the cores in which the lamellar overgrowths on adjacent cores intermesh and are capable of sustaining a haul off tension of at least 10 MPa without breaking during its extrusion, is produced by extruding an olefin copolymer through a die under a pressure of about 5-10 MPa, at a temperature above the self-blocking temperature thereof and by hauling off the extrudate at a tension of at least 10 MPa without breaking. The extrudates so produced have a high modulus.

Abstract: The invention relates to a thermosetting composition comprisingA: 30-65 parts by weight of unsaturated polyester with a molar mass per double bond of 142-500B: 25-55 parts by weight of ethylenically unsaturated monomerC: 3-35 parts by weight of slightly ethylenically unsaturated polyesterD: 0-750 parts by weight of filler, fibrous material and, if so desired, other usual additives, characterized in that as as slight ethylenically unsaturated polyester an unsaturated polyester is used which has a molar mass per double bond of 1200-20,000 and an acid number of 5-50, and in which between 50 and 90% of the unsaturation consists of a terminal monoester of a .alpha., .beta.-unsaturated dicarboxylic acid. The composition presents little or no shrinkage in setting.

Abstract: A composite for the absorption of energy comprising fibers having a breaking length of at least 80 km and an elongation at break of at least 2%, such as fibers of a linear polyethylene of ultrahigh molecular weight, and carbon fibers or glass fibers, embedded in a matrix. The first fibers are preferably arranged at obtuse angles (.+-.(45.degree. to 95.degree.)) and the carbon fibers or glass fibers are preferably arranged at acute angles (0.degree. to .+-.30.degree.) to the direction of pressure application in the matrix. The composites may be designed in the form of tubes or corrugated plates (FIG. 5).

Abstract: A flame retardant thermoplastic containing an effective flame retardant amount of phospham. In additional embodiments, the thermoplastic has a processing temperature of above 200.degree. C., and may include one or more polymers selected from the group consisting of styrene-containing polymers, polyolefins and polyamides.

Abstract: The invention provides molded polyamide articles and a process for making the same. The molded polyamide articles consist substantially of tetramethylene adipamide units, the articles having an increased crystallinity expressed as a first melting enthalpy which is at least 30 Joules per gram higher than a second melting enthalpy determined after subsequent solidification of the polyamide. The process comprises shaping the polyamide from the melt, cooling the resulting polyamide article, and heat treating the article in an inert gas atmosphere at a temperature of 220.degree. C. for 0.25 to 24 hours.