Abstract: Microporous film of ultra high molecular weight polyethylene with a high degree of moisture vapor transmission rate and a permeability to air that lies within a narrow range and a process for the production of a film with a high degree of moisture vapor transmission rate and a permeability to air that lies within a narrow range from a polyolefine by extruding a solution of the polyolefine in a first solvent, followed by cooling, the removal of the solvent and stretching of the film, in which the surface of one and only one side of the film is brought into close contact with a second solvent for the polyolefine before the film is contacted with the cooling agent.

Abstract: The invention relates to a process for the production of high-molecular-weight polytetramethylene adipamide from equivalent amounts of 1,4-diaminobutane and adipic acid at lower pressures. By supplying 1,4-diaminobutane at an advanced stage of the polycondensation a first polycondensate is obtained that can be extruded very well and that can be aftercondensed in the solid phase to obtain a product with a high molecular weight within a short time. Because of this a substantial overall gain in time is realized. It even appears to be possible to prepare a first polycondensate with a relative viscosity that is high enough for the polycondensate to be further processed into shaped objects.The polycondensation can be carried out both in the melt and in solution.The diaminobutane can be supplied both via the liquid and via the vapour phase.

Abstract: The present invention relates to a reaction injection molding process, to a composition utilized therein as well as to a kit of parts from which the composition can be obtained. In particular, the process includes the use of a composition which contains at least 70% of low molecular weight compounds which are capable of forming a crosslinked polymer. The first component of the composition is a compound with at least an ethylenic unsaturation and an isocyanate-reactive group. The second component of the composition contains an ethylenically unsaturated monomer capable of copolymerizing with the first component. The third component of the composition is a polyisocyanate. Polymerization of the first and second components takes places prior to the reaction between the first and third components.

Abstract: A process for the preparation and processing of a hydroxylammonium salt solution involves maintaining an aqueous acid reaction medium circulation between a hydroxylammonium salt synthesis zone and an oxime synthesis zone; continuously supplying nitrate ions or nitrogen oxides to be converted into nitrate, by way of nitrogen source for the formation of the hydroxylammonium salt, to the liquid being maintained in circulation; catalytically reducing the nitrate ions with hydrogen to obtain hydroxylamine; removing the ammonium ions, formed as a by-product in the reduction of the nitrate ions, by contacting the circulating liquid with a gas flow consisting of nitrogen oxides generated in catalytic combustion of ammonia. Advantageously, 0.01 to 5 wt. % of the nitrogen oxides formed in the combustion effect reduction of the ammonium ions to nitrogen, and the remainder of the nitrogen oxides are used for the preparation of nitric acid.

Abstract: The present invention relates to a catalyst and a process for the preparation of an olefin polymer, which catalyst comprises a transition metal component and an organometal component. The transition metal component comprises a transition metal atom onto which an imidoaryl ligand is bound.More specifically the transition metal is vanadium or titanium.

Abstract: A microporous film with improved resistance to elevated temperatures from a first, thermoplastic polymer, the internal and external surfaces of the film being provided with a continuous coating layer of a second polymer having a higher softening temperature than the first polymer and process for coating a film of a first polymer with a layer of a second polymer.

Abstract: The invention relates to a process for the preparation of a phenol-formaldehyde resin by causing phenol and formaldehyde to condense under the influence of a basic catalyst, the catalyst being an aqueous solution containing alkali metal ions, carbonate ions, ions of carboxylic acids and one or more ions chosen from the group comprising transition metal ions and borates.

Abstract: An accelerator composition and a rubber compounding composition in which a rubber is blended with a combination of three accelerators and sulfur for curing the rubber while minimizing the formation of iridescent sheen. The combination of accelerators included a thiolated morpholine, a dithiocarbamate and a benzothiazole.

Abstract: The invention relates to a selective removal of impurities from the gas stream leaving a melamine synthesis reactor in the preparation of melamine from urea by means of a treatment with steam at elevated temperature in the presence of a catalyst which is shape-selective. For instance a molecular sieve is chosen.

Abstract: A multilayer antiballistic structure having good antiballistic properties comprises a first layer which comprises ceramic tiles and a second layer of composite material which comprises polyalkene filaments having a tensile modulus of at least 40 GPa and a tensile strength of at least 1 GPa and a matrix which at least partially surrounds the polyalkene filaments, while the antiballistic structure comprises, between the first and the second layer an intermediate layer of a material having a flexural modulus which is higher than the flexural modulus of the composite material of the second layer and is lower than the flexural modulus of the ceramic material.Good results are obtained if the intermediate layer comprises a composite material.

Abstract: Method for the preparation of a polymeric shaped article containing an electrically conductive polymer wherein a base shaped article possessing electrically conductive properties is moved along an anode, at least part of the article being in contact with the anode, in the presence of an electrolyte-containing medium containing monomer units, which on polymerization form an electrically conductive polymer and wherein a voltage is applied between the anode and a second electrode which is in contact with the electrolyte-containing medium. It has appeared that, in the method according to the invention, the shaped article does not adhere to the electrode so that the method may be practiced continuously. A further advantage of the shaped article failing to adhere to the electrode is that the method according to the invention generates very little waste.

Abstract: The invention relates to a catalyst that is very suitable for the conversion of a benzoic acid into the corresponding benzaldehyde. The catalyst can be obtained via coprecipitation of a manganese salt, a salt from which an acid support is formed, a zinc salt and optionally a copper salt at a pH between 4 and 10, calcination, after precipitation, of the coprecipitate at a temperature of between 300 and 700.degree. C. and then, optionally, reduction of the calcined coprecipitate with the aid of a hydrogen-containing gas mixture. Using such a catalyst the hydrogenation of a benzoic acid can be carried out at lower temperature resulting in energy-savings and, hence, cost-savings.

Abstract: Photocurable liquid coating compositions adapted to provide primary coatings for optical glass fibers are disclosed. These compositions comprise an acrylate-terminated polyurethane, an acrylate of an unsubstituted or C.sub.1 -C.sub.10 alkyl substituted phenol that is alkoxylated with a C.sub.2 -C.sub.4 alkylene oxide and at least one alkylacrylate having a T.sub.g below about -45.degree. C. Films produced from these ultraviolet light curable compositions are flexible and possess good water resistance and good wet adhesion.

Abstract: Process for preparing an a-amino acid having the general formula (1) of ##STR1## where R represents an aryl group or a substituted aryl, cycloalkyl or alkyl group, in which process glyoxylic acid, or a precursor or derivative thereof, is contacted in the presence of sulphamic acid with an unsaturated compound chosen from the group of aromatics, cycloalkenes and alkenes. By applying the process higher efficiencies are obtained.The acid obtained as reaction product can be esterified and amidated without prior isolation.

Abstract: The invention relates to a process for the preparation of cycloalkanone and optionally cycloalkanol by causing a mixture containing cycloalkylhydroperoxide to react with cycloalkene under the influence of a catalyst, characterised in that the reaction is carried out with a short measure of cycloalkene relative to the cycloalkylhydroperoxide, under such conditions that virtually all of the cycloalkene reacts to cycloalkene oxide and optionally cycloalkanol and/or cycloalkanone, after which the mixture, optionally after decomposition of cycloalkylhydroperoxide and distillation of cycloalkane, is subjected to a first separation, in which cycloalkene oxide--and optionally other components--is separated, after which the cycloalkene oxide in the separated mixture is isomerised to substantially cycloalkanone, after which the cycloalkanone obtained--and optionally cycloalkanol--is recovered.

Abstract: The invention relates to a powder paint, comprising a polyepoxy compound, a polyester resin and customary additives, the polyester resin having an acid number ranging from 15 through 70 and a hydroxyl number of 10 or below and being substantially based on units of dicarboxylic acids, glycols and monomers of functionality three or higher, wherein the dicarboxylic acids are comprised of at least 15 mole % of isophthalic acid and at least 5 mole % of 1,4-cyclohexane dicarboxylic acid and wherein the glycols are comprised of at least 50 mole % of branched aliphatic glycols with 5-11 carbon atoms, which may optionally comprise an ester group, and at most 50 mole % of aliphatic glycol with 2-6 carbon atoms, and wherein the monomers have a functionality three or higher in an amount of at most 8 mole % of dicarboxylic acids plus glycols.

Abstract: The invention relates to a powder paint, comprising a polyepoxy compound, a polyester resin and customary additives, the polyester resin having an acid number ranging from 15 through 70 and a hydroxyl number of 10 or below and being substantially based on units of dicarboxylic acids, glycols and monomers of functionality three or higher, wherein the dicarboxylic acids are comprised of at least 15 mole % of isophthalic acid and at least 5 mole % of 1,4-cyclohexane dicarboxylic acid and wherein the glycols are comprised of at least 50 mole % of branched aliphatic glycols with 5-11 carbon atoms, which may optionally comprise an ester group, and at most 50 mole % of aliphatic glycol with 2-6 carbon atoms, and wherein the monomers have a functionality three or higher in an amount of at most 8 mole % of dicarboxylic acids plus glycols.

Abstract: The invention relates to a compound having the Formula (I) ##STR1## in which n=1, 2, 3 or 4 and m=1, 2, 3, 4, 5, 6, 7 or 8. The invention also relates to a method for the preparation of the above-described compound by bringing a cycloalkyl hydroperoxide having 5 to 12 carbon atoms into contact with a cycloalkene having 5-8 carbon atoms, under the influence of a metal compound as catalyst, the metal being chosen from groups VIB, VIIB and VIII of the periodic system. The reaction takes place at a temperature of 0.degree.-80.degree. C.

Abstract: The invention relates to a method for the preparation of a 2-(2-cyanoethyl)-cyclopentanone by reaction of a cyclopentanone which contains at least one .alpha.-H atom with an .alpha.,.beta.-unsaturated nitrile in the presence of a catalytic amount of pyrrolidine as catalyst and optionally also a catalytic amount of an acid compound. A high selectivity and a high catalyst activity are achieved with the method.

Abstract: Process for the manufacture of a polarizing film by drawing a polymer film containing a dichroic dye at a temperature above the glass transition temperature of the polymer, the polymer film consisting mainly of a semicrystalline polyolefine and being drawn at a temperature below the crystalline melting point of the polyolefine, the dye being present in liquid form at that drawing temperature, and a polarizing dye-containing polyolefine film having a dichroic ratio of at least 15.