摘要:
The present invention provides polymer blends comprising the components (a) from 40% to 95% by weight of at least one polyaryl ether copolymer constructed of (a1) from 50% to 99.9% by weight of building units of the general formula I and from 0% to 40% by weight of further building units II selected from segments of one or more thermoplastic polymers, and (a2) from 0.1% to 10% by weight of at least one crosslinker V having at least three hydroxyl functionalities, the at least one crosslinker V being present in component (a) in converted form and the sum total of % by weight for (a1) and (a2) being 100% by weight, and (b) from 5% to 60% by weight of at least one hydrophilic polymer selected from polyvinylpyrrolidone, polyvinylpyrrolidone copolymers, polyethylene glycol, polypropylene glycol, copolymers of ethylene glycol and propylene glycol, water-soluble cellulose derivatives, polyamide, polyvinyl acetate and polyvinyl alcohol, where the sum total of % by weight for components (a) and (b) is 100% by weight. The present invention also provides combinations of distinct components (a) and (b) for conjoint use. The invention further provides polymer membranes comprising the aforementioned polymer blends and also a process for their production and the use of the polymer membranes for producing dialysis filters. The present invention also provides dialysis filters comprising the aforementioned hollow fiber membranes.
摘要:
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.
摘要:
An engine control system comprises first and second integral modules, a summer module, and a torque adjustment module. The first integral module determines an engine speed (RPM) integral value based on a difference between a desired RPM and a measured RPM. The second integral module determines a torque integral value based on a difference between a desired torque output for an engine and an estimated torque of the engine. The summer module determines an RPM-torque integral value based on a difference between the RPM and torque integral values. The torque adjustment module determines a torque adjustment value based on the RPM-torque integral value and adjusts the desired torque output and the estimated torque based on the torque adjustment value.
摘要:
Thermoplastic molding compositions comprising A) from 10 to 69% by weight of a thermoplastic polyester B) from 30 to 79% by weight of an aluminum oxide C) from 0.01 to 10% by weight of an organic or inorganic acid or mixture of these D) from 0 to 10% by weight of D1) at least one highly branched or hyperbranched polycarbonate with an OH number of from 1 to 600 mg KOH/g of polycarbonate (to DIN 53240, part 2), or D2) at least one highly branched or hyperbranched polyester of AxBy type, where x is at least 1.1 and y is at least 2.1, or a mixture of these E) from 0 to 50% by weight of other additives, where the entirety of the percentages by weight of components A) to E) gives 100%.
摘要:
The present invention relates to a method for enriching nucleic acids with a length of not more than 300 nucleotidesThe invention also relates to a kit for enriching nucleic acids with a length of not more than 300 nucleotides, to the use of such a kit, to the use of an anion exchange matrix and to a method for treating a disease.
摘要:
Lighting elements composed of thermoplastic molding compositions comprising A) from 10 to 99.9% by weight of at least one thermoplastic polyester, B) from 0.1 to 50% by weight of at least one terpolymer, obtainable from b1) at least one vinylaromatic monomer, b2) at least one C1-C4-alkyl (meth)acrylate or (meth)acrylonitrile, and b3) from 0.1 to 10% by weight, based on the total weight of the components b1) to b3), of at least one monomer which comprises an α,β-unsaturated anhydride, and C) from 0 to 60% by weight of other additives, where the total of the percentages by weight of components A) to C) is 100%.
摘要:
Semiconductor wafers of silicon are produced by pulling a single crystal from a melt contained in a crucible and slicing semiconductor wafers from the pulled single crystal, heat being delivered to a center of the growing single crystal at the boundary with the melt during the pulling of the single crystal, a CUSP magnetic field applied such that a neutral surface of the CUSP magnetic field intersects a pulling axis of the single crystal at a distance of at least 50 mm from a surface of the melt. An apparatus suitable therefore contains a CUSP field positioned such that a neutral field intersects the axis of the crystal in the crucible 50 mm or more from the melt surface.
摘要:
The invention relates to a process for producing highly doped semiconductor wafers, in which at least two dopants which are electrically active and belong to the same group of the periodic system of the elements are used for the doping. The invention also relates to a semiconductor wafer which is free of dislocations and is doped with at least two electrically active dopants which belong to the same group of the periodic system of the elements.
摘要:
Thermoplastic molding compositions comprising a mixture of a component (A), a component (B), a component (C) and a component (D), methods for their preparation and use, and mold-release agents for thermoplastic molding compositions: wherein the component (A) comprises a methyl methacrylate polymer; wherein the component (B) comprises a copolymer prepared by polymerizing from 75 to 88% by weight of a vinylaromatic monomer and from 12 to 25% by weight of a vinyl cyamide; wherein the component (C) comprises a graft copolymer prepared by copolymerizing: from 60 to 90% by weight, based on component (C), of a core, from 5 to 20% by weight, based on component (C), of a first graft shell, and from 5 to 20% by weight, based on component (C), of a second graft shell; and wherein the component (D) comprises at least one highly branched or hyperbranched polymer selected from the group consisting of (D1) highly branched or hyperbranched polycarbonates, (D2) highly branched or hyperbranched polyesters of Ax+By type, where x is at least 1.1 and y is at least 2.1, and mixtures thereof.
摘要翻译:包含组分(A),组分(B),组分(C)和组分(D)的混合物的热塑性模塑组合物,其制备和使用方法以及用于热塑性模塑组合物的脱模剂:其中 组分(A)包括甲基丙烯酸甲酯聚合物; 其中组分(B)包括通过使75至88重量%的乙烯基芳族单体和12至25重量%的乙烯基芳族聚酰胺聚合而制备的共聚物; 其中组分(C)包括通过以下组分制备的接枝共聚物:基于组分(C),基于组分(C)的60至90重量%的核心,基于组分(C)5至20重量% 第一接枝壳,和基于组分(C)5至20重量%的第二接枝壳; 并且其中组分(D)包含至少一种选自(D1)高度支化或超支化聚碳酸酯的高度支化或超支化聚合物,(D2)高支化或超支化的A x + 其中x至少为1.1,y为至少2.1,以及它们的混合物。
摘要:
The present invention relates to processes for the targeted transfection of cells, compositions which may be used for such processes, and corresponding pharmaceutical compositions for gene therapy. In particular, the invention relates to a process for introducing nucleic acid into cells comprising the steps of (a) mixing a nucleic acid with a dendrimer, in which a proportion of the dendrimer molecules are biotinylated; (b) mixing the resulting complex of nucleic acid and dendrimer with a second complex consisting of avidin or streptavidin and a biotinylated target-specific binding molecule; and (c) incubating the complex formed in step (b) with cells. Dendrimers which are well suited to the present invention include, for example, partially solvolysed polyamidoamine (PAMAM) dendrimers. Target-specific binding molecules are, in particular, cell-type-specific markers of the cell surface of the target cells.