Abstract: The present invention relates to novel molding compositions based on semicrystalline engineering thermoplastics which, in conventional processing techniques, give moldings with reduced surface gloss. A feature of the molding compositions is that they comprise, in a polymer matrix, if appropriate with the usual additives, polymer particles with a median size d50 of from 0.1 ?m to 100 ?m, and comprise at least one other incompatible or semicompatible polymer which has not been chemically crosslinked, and also, if appropriate, comprise salt-like additives. The invention further relates to moldings which are produced by means of conventional processing techniques, in particular via injection molding, from these matt-effect molding compositions.

Abstract: The present invention relates to novel molding compositions based on semicrystalline engineering thermoplastics which, in conventional processing techniques, give moldings with reduced surface gloss. A feature of the molding compositions is that they comprise, in a polymer matrix, if appropriate with the usual additives, polymer particles with a median size d50 of from 0.1 ?m to 100 ?m, and comprise at least one other incompatible or semicompatible polymer which has not been chemically crosslinked, and also, if appropriate, comprise salt-like additives. The invention further relates to moldings which are produced by means of conventional processing techniques, in particular via injection molding, from these matt-effect molding compositions.

Abstract: Novel halogen-free flame-retardant thermoplastic molding compositions are described, and give laser-markable moldings with increased quality of marking. The molding compositions comprise at least one thermoplastic A) and at least one light-sensitive compound of salt type B1) which within the polymer matrix when exposed to laser light changes its color or leads to a change in the color of the polymer matrix, and/or at least one light-sensitive or light-sensitizing oxide B2) which within the polymer matrix when exposed to laser light changes its color or leads to a change in the color of the polymer matrix, and at least one halogen-free compound or mixture C) which has a positive effect on the flammability and fire performance of the molding composition, and if appropriate, other conventional additives D). The invention further relates to moldings produced from these laser-markable flame-retardant molding compositions, and also to laser-marked moldings produced therefrom.

Abstract: Laser-markable molding compositions, molding produced therewith and method of marking the same, wherein the molding compositions comprise: (a) at least one semicrystalline thermoplastic; and (b) at least one particulate additive selected from the group consisting of (i) light-sensitive salt compounds, (ii) inorganic oxides having an average particle diameter of less than 250 nm, and combinations thereof; wherein the light-sensitive salt compounds comprise compounds having two or more cations, wherein at least one of the two or more cations is selected from the group consisting of Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ag, Sn, Sb, La, Pr, Ta, W. and Ce; and wherein at least another of the two or more cations is selected from the group consisting of elements of periods 3-6 of main groups II and III, elements of periods 5-6 of main group IV, elements of periods 4-5 of transition groups III-VIII, and the lanthanoids.

Abstract: A sulfonated aromatic polyether ketone of the formula (II) [Ar—O—Ar?—CO—Ar?—O—Ar—CO—Ar?—CO—] ??(II) in which from 1% to 100% of the O-phenylene-CO units are substituted with an SO3M group and sulfonated and unsulfonated O-phenylene-CO units can be in any desired sequence with respect to one another, the radicals Ar, Ar? and Ar? independently of one another are substituted or unsubstituted 1,2-, 1,3- or 1,4-phenylene rings, and M, taking into account the ionic valencies, comprises one or more elements selected from the following group: H, NR4+, where R is H or C1-C4-alkyl, or an alkali metal or alkaline earth metal or a metal from subgroup 8, and is preferably H, NR4+, Li, Na, K, Ca, Mg, Fe or Pt.

Abstract: A process and an apparatus are described for preparation of oxymethylene polymers. This process encompasses polymerization, in a homogeneous phase, of a monomer which forms oxymethylene groups, as far as 90% of maximum conversion in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by deactivation of the reaction mixture. The resultant oxymethylene polymers have alkyl ether end groups and are extremely stable.

Abstract: An apparatus is described for preparation of oxymethylene homo- and copolymers. This encompasses heterogeneous polymerization of a monomer which forms oxymethylene groups in the presence of an acetal of formaldehyde and of an initiator for cationic polymerization, followed by the deactivation of the polymer in a homogeneous phase via treatment with a basic aprotic solvent or with an aprotic solvent which comprises a base. Oxymethylene homopolymers with very high stability are also described.

Abstract: The present invention relates to novel molding compositions based on semicrystalline engineering thermoplastics which, in conventional processing techniques, give moldings with reduced surface gloss. A feature of the molding compositions is that they comprise, in a polymer matrix, if appropriate with the usual additives, polymer particles with a median size d50 of from 0.1 ?m to 100 ?m, and comprise at least one other incompatible or semicompatible polymer which has not been chemically crosslinked, and also, if appropriate, comprise salt-like additives. The invention further relates to moldings which are produced by means of conventional processing techniques, in particular via injection molding, from these matt-effect molding compositions.

Abstract: A sulfonated aromatic polyether ketone of the formula (II) [Ar—O—Ar?—CO—Ar?—O—Ar—CO—Ar?—CO—]??(II) in which from 1% to 100% of the O-phenylene-CO units are substituted with an SO3M group and sulfonated and unsulfonated O-phenylene-CO units can be in any desired sequence with respect to one another, the radicals Ar, Ar? and Ar? independently of one another are substituted or unsubstituted 1,2-, 1,3- or 1,4-phenylene rings, and M, taking into account the ionic valencies, comprises one or more elements selected from the following group: H, NR4+, where R is H or C1-C4-alkyl, or an alkali metal or alkaline earth metal or a metal from subgroup 8, and is preferably H, NR4+, Li, Na, K, Ca, Mg, Fe or Pt.

Abstract: Electrically conductive compositions and method for the production and use thereof

Abstract: Microparticles with a uniform spherical shape and a very narrow size distribution are described. They consist wholly or partly of a linear water-insoluble polysaccharide, preferably of 1,4-&agr;-D-polyglucan, and may contain other, in particular biodegradable, polymers and/or active substances. They are suitable inter alia for the controlled delivery of active substances. They are prepared by dissolving 1,4-&agr;-D-polyglucan or the polysaccharide in a solvent, introducing the solution into a precipitant, cooling the mixture and removing the particles formed.

Abstract: The present invention relates to a process for preparing mixture from a large number of components, the concentrations of the components used being capable of continuous variation over prescribed ranges in a very simple manner. For this, the mixtures are continuously prepared in a mixing assembly and continuously converted into a form which can be subjected to further processing. By way of example, the invention may be used for producing substance libraries for high-throughput screening in the plastics industry, in particular of mixtures of polymers with one another and of mixtures of polymers with added materials.

Abstract: The present invention relates to a continuous process for the preparation of mixtures from a wide variety of components, and also to an apparatus for carrying out the process.

Abstract: The present invention relates to a method for preparing smooth-surface spherical microparticles which are completely or partially made of at least one water-insoluble linear polysaccharide. This method involves dissolving the at least one water-insoluble linear polysaccharide in a solvent or a mixture of solvents, introducing the solution into a precipitation agent or a mixture of precipitation agents, optionally cooling the mixture thus obtained, and separating the microparticles thus formed. The precipitation agent used consists of at least one water-soluble cellulose derivative. This invention also relates to microparticles obtained according to this method.

Abstract: Microparticles with a uniform spherical shape and a very narrow size distribution are described. They consist wholly or partly of a linear water-insoluble polysaccharide, preferably of 1,4-&agr;-D-polyglucan, and may contain other, in particular biodegradable, polymers and/or active substances. They are suitable inter alia for the controlled delivery of active substances. They are prepared by dissolving 1,4-&agr;-D-polyglucan or the polysaccharide in a solvent, introducing the solution into a precipitant, cooling the mixture and removing the particles formed.

Abstract: The invention relates to a controlled release tablet which in part or as a whole contains water-insoluble linear polysaccharides, preferably the polysaccharide poly(1,4-&agr;-D-glucan), in the form of microparticles, as retardation material. The tablet is also capable of controllably releasing an active agent.

Abstract: The present invention relates to a topical preparation containing spherical microparticles as the essential component, wherein the microparticles comprise water-insoluble linear polyglucan.

Abstract: Polymer electrolytes and process for their preparation

Abstract: Polymer electrolytes and process for their preparation

Abstract: The present invention relates to a method for preparing smooth-surface spherical microparticles which are completely or partially made of at least one water-insoluble linear polysaccharide. This method involves dissolving the at least one water-insoluble linear polysaccharide in a solvent or a mixture of solvents, introducing the solution into a precipitation agent or a mixture of precipitation agents, optionally cooling the mixture thus obtained, and separating the microparticles thus formed. The precipitation agent used consists of at least one water-soluble cellulose derivative. This invention also relates to microparticles obtained according to this method.