摘要:
In one aspect, an optical sensor is used to detect defects, which can appear on smooth surfaces, is provided. The sensor includes a telecentric laser scanner and a detection unit. The scanner includes a laser for the approximately perpendicular illumination of a smooth surface, a scanning mirror, and a telecentric optical system for guiding illumination and detection beams the detection unit includes an optical detector system, a central diaphragm, which is concentrically positioned in the vicinity of the optical detector system in the direction toward the telecentric laser scanner, a highly sensitive photomultiplier for detecting scattered light, which emanates from defects on smooth surfaces, and a slit diaphragm arranged upstream of the photomultiplier.
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, the essence of the invention being that the first graft shell (C2) is obtainable by polymerizing a monomer mixture consisting of (C21) from 30 to 39% by weight, based on (C2), of a styrenic monomer, (C22) from 61 to 70% by weight, based on (C2), of a C1-C8-alkyl ester of methacrylic acid and (C23) from 0 to 3% by weight, based on (C2), of a crosslinking monomer, and also to processes for producing these molding compositions, to their use and to the moldings obtainable therefrom.
摘要:
Thermoplastic molding compositions, comprising A) a polyamide A1), containing at least one end group derived from a piperidine compound, and B) a copolymer which contains at least one functional group which can react with the end groups of the polyamide present in component A).
摘要:
The invention relates to thermoplastic moulding materials containing the components A, B, C and D, in addition to optional components E, F, G and H, said components being composed as follows: A) between 1 and 97.5 wt. % of at least one aromatic polycarbonate A; B) between 1 and 97.5 wt. % of at least one graft polymer B consisting of b1) between 40 and 80 wt. % of a graft base obtained from a rubber elastic polymer B1, b2) between 20 and 60 wt. % of a graft support B2 consisting of b21) between 60 and 95 wt. % styrene or substituted styrenes B21 and b22) between 5 and 40 wt. % of at least one unsaturated nitrile B22; C) between 1 and 97.5 wt. % of at least one thermoplastic copolymer C consisting of c1) between 60 and 85 wt. % styrene or substituted styrenes C1 or mixtures thereof and c2) between 15 and 40 wt. % of at least one unsaturated nitrile C2; D) between 0.5 and 50 wt. % of at least one copolymer D, obtained by reacting d1) between 5 and 95 wt % of at least one thermoplastic methacrylate polymer D1 containing at least one type of functional group, selected from epoxy, carboxyl, hydroxyl, anhydride and oxazoline, with d2) between 5 and 95 wt. % of at least one thermoplastic polyester D2; E) between 0 and 40 wt. % of at least one filler E; F) between 0 and 2 wt. % of at least one organic acid F; G) between 0 and 25 wt. % of at least one phosphorus compound G that is devoid of halogen; H) between 0 and 45 wt. % of additional additives H.
摘要:
Cationic cytofectins and liposomes comprising the same are disclosed which are especially useful for delivering exogenous compounds into cells in vitro and in vivo. The liposomes may comprise (a) a neutral lipid such as dioleoylphosphatidyl-ethanolamine (DOPE) or similar lipid-like compounds such as 1,2-dioleoyl-oxiphosphatidylethanolamine or other lipid-like structures and (b) one or more of the cationic cytofectins provided herein. The invention provides transfection kits and methods for delivery of exogenous compounds into cells.
摘要:
The use of a thermoplastic molding composition which is not ABS, comprising, based on the total of the amounts of components A, B, C, and, where appropriate, D, this total being 100% by weight, a: as component A, from 1 to 48% by weight of at least one particulate emulsion polymer which has one or more phases and has a glass transition temperature below 0° C. in at least one phase, and has a median particle size from 50 to 1000 nm, b: as component B, from 1 to 48% by weight of at least one amorphous or semicrystalline polymer, c: as component C, from 51 to 90% by weight of polycarbonates, and d: as component D, from 0 to 47% by weight of conventional addictives and/or fibrous or particulate fillers, or a mixture of these, for producing moldings, or corresponding semifinished products, for the garden sector or animal-keeping sector.
摘要:
In a method for drying substrates, in particular, semiconductor wafers, an especially residue-free drying of the substrates results when, during removal of the substrates from a liquid, a meniscus of the liquid forming at the transition between the substrate surface and the liquid surface is heated. A device for performing the method is disclosed.
摘要:
Thermoplastic molding compositions, comprising (A) from 20 to 99% by weight of at least one graft copolymer, (B) from 1 to 80% by weight of a copolymer obtained from at least one alpha-olefin and from at least one polar comonomer, with the proviso that the monomers used are not vinyl acetate or any vinylaromatic monomer, and (C) from 0 to 80% by weight of a thermoplastic polymer, obtained by polymerizing a monomer mixture, of (c1) from 50 to 100% by weight of at least one vinylaromatic monomer and/or of a C1-C8-alkyl (meth)acrylate, and (c2) 0 to 50% by weight of at least one monofunctional comonomer, and (D) from 0.5 to 30% by weight of a (co)polymer made from (d1) from 50 to 100% by weight of isobutene and (d2) from 0 to 50% by weight of one or more other monomers, process of preparing same and their uses.
摘要:
Thermoplastic molding materials contain A) from 5 to 97.9% by weight of a polyphenylene ether B) from 1 to 93.9% by weight of a vinylaromatic polymer C) from 1 to 50% by weight of an elastomeric polymer D) from 0.1 to 10% by weight of a stabilizer mixture comprising d1) at least one sterically hindered phenol, d2) at least one phosphonite and d3) at least one alkyl aryl phosphite, E) from 0 to 70% by weight of a polyamide and F)from 0 to 60% by weight of further additives and processing assistants, the sum of the percentages by weight of components A) to F) being 100%.
摘要:
A electrochemical sensor for the detection of traces of HF and/or other acid gases in air, comprising a measuring electrode of an electrochemically active metal oxide powder, a reference electrode for fixing the potential of the measuring electrode close to the equilibrium potential of the oxidation/reduction system of MeOn/Mem+, and a counter electrode. The electrodes are in communicative contact with a hygroscopic electrolyte. The measured gas component changes the pH of the electrolyte, and thus the electrochemical equilibrium of the measuring electrode, to produce a measurable electrical current that is proportional to the concentration of the detected acid gas.
摘要翻译:一种电化学传感器,用于检测空气中的HF和/或其他酸性气体的迹线,包括电化学活性金属氧化物粉末的测量电极,用于固定测量电极的电位接近于氧化的平衡电位的参比电极 /还原体系MeOn / Mem +和对电极。 电极与吸湿电解质交流接触。 测量的气体组分改变电解质的pH,并因此改变测量电极的电化学平衡,以产生与所检测的酸性气体的浓度成比例的可测量的电流。