摘要:
A contact piece is formed by a tungsten overlay soldered onto a support, wherein at least portions of the solder layer and optionally of the support are covered by a layer of a less noble metal than tungsten. The corrosion resistance of the tungsten overlay is considerably improved.
摘要:
The present invention relates to a liquid coating composition comprising i) at least one inorganic binder of the generic formula SiaR1bOc(OR2)d with a≧2, b≧0, c≧1, d≧5 and R1 and R2=organic radical, ii) at least one solvent and iii) at least one oxide pigment which, after addition of a mixture consisting of 15 ml of 1 M oxalic acid and 15 ml of 20% aqueous hydrochloric acid, based on 1 g of substance, under standard conditions, leads to a temperature rise of at least 4° C., to processes for preparation thereof and to the use thereof.
摘要:
The invention relates to a pH-dependent controlled release pharmaceutical composition, comprising a core, and an opioid, wherein the core is coated at least by one coating layer, controlling the release of the pharmaceutical composition, wherein the coating layer comprises a polymer mixture of i) 40 95% by weight, based on dry weight of the polymer mixture, of at least one water insoluble essentially neutral vinyl polymer, and ii) 5 60% by weight, based on dry weight of the polymer mixture, of at least one anionic polymer or copolymer, which is insoluble in a buffered medium below pH 4.0 and soluble at least in the range from pH 7.0 to pH 8.0, characterized in that the coating layer further comprises 110 to 250 % by weight of a non-porous inert lubricant, 1 to 35 % by weight of a neutral cellulosic compound and 1 to 25 % by weight of an emulsifier, each calculated on dry weight of the polymer mixture.
摘要:
Motor oils and transmission oils of the usual commercial SAE single- and multiple viscosity classes, which oils contain polymeric additives and which have high dispersivity and good wear protection characteristics, said oils containing the following additives: (i) at least one heavy-duty (HD) additive, which contains phosphorus compounds; and (ii) as dispersive polymeric components PC, cooligomers copolymers, or combinations thereof comprised of: (a) units of C6-24 alkyl (meth)acrylates, (b) units of at least one functionalized alkyl (meth)acrylate, (c) units of one or more C1-5-alkyl (meth)acrylate monomers, and (d) units of 1-alkenes, with the following provisions: (1) the units of formulas I and II together comprise 100 wt. %, (2) the content of polymer components) PC in the additive-containing mineral oils is in the range 0.5-50 wt. %, and (3) the content of phosphorus in the additive-containing mineral oils is less than or equal to 0.08 wt. %.
摘要:
The present invention, relates, to a process, for producing structured coatings, in which a coating composition comprising at least one inorganic binder, at least one oxide pigment which, after addition of a mixture consisting of 15 ml of 1 M oxalic acid and 15 ml of 20% aqueous hydrochloric acid based on 1 g of substance, under standard conditions, leads to a temperature rise of at least 4° C., and at least one solvent is applied to a substrate, the resulting coating composition film is partially coated with a photoresist and the substrate coated with the coating composition and the photoresist is treated with an acid, to the structured layers obtainable by the process and to the use thereof.
摘要:
The invention relates to a pH-dependent controlled release pharmaceutical composition, comprising at least one pharmaceutical active ingredient, with the exception of opioids, wherein the core is coated at least by one coating layer, controlling the release of the pharmaceutical composition, wherein the coating layer comprises a polymer mixture of i) 40-95% by weight, based on dry weight of the polymer mixture, of at least one water insoluble essentially neutral vinyl polymer or copolymer, and ii) 5-60% by weight, based on dry weight of the polymer mixture, of at least one anionic polymer or copolymer, which is insoluble in a buffered medium below pH 4.0 and soluble at least in the range from pH 7.0 to pH 8.0, characterized in that the coating layer further comprises 110 to 250% by weight of a non-porous inert lubricant, 1 to 35% by weight of at least one neutral cellulosic compound and 1 to 25% by weight of at least one emulsifier, each calculated on dry weight of the polymer mixture.
摘要:
The synthesis of the first examples of a new class of inorganic macromolecules, the polythiophosphazenes, is reported. When heated at 90.degree. C., the cyclothiophosphazene N.sub.3 P.sub.2 SCl.sub.5 undergoes ring-opening polymerization to yield the high polymeric polythiophosphazene [N.sub.3 P.sub.2 SCl.sub.5 ].sub.n. The latter functions as a reactive macromolecular intermediate and undergoes halogen replacement with sodium phenoxide and sodium o-phenylphenoxide to afford the polymers [N.sub.3 P.sub.2 S(OPh).sub.5 ].sub.n and [N.sub.3 P.sub.2 S(OC.sub.6 H.sub.4 Ph--o).sub.3.25 Cl.sub.1.75 ].sub.n, respectively.
摘要翻译:报道了一类新的无机大分子,即聚硫代磷腈的合成。 当在90℃下加热时,环硫基磷腈N 3 P 2 SCl 5进行开环聚合,得到高分子聚硫代磷腈[N 3 P 2 SCl 5] n。 后者用作反应性大分子中间体,并用苯酚钠和邻苯基苯酚钠进行卤素置换,分别得到聚合物[N 3 P 2 S(OPh)5] n和[N 3 P 2 S(OC 6 H 4 Ph-o)3.25 Cl1.75] n。
摘要:
A method for studying a fluid by forming a stream of the fluid, exciting the stream by causing a laser beam to impinge thereon to produce secondary particles or quanta, and subjecting the resulting secondary particles or quanta to an analysis operation in an analyzer.
摘要:
The invention relates to a controlled release pharmaceutical composition, comprising a core, comprising a pharmaceutical active ingredient, whereby the core is coated by an ethanol resistance conferring coating layer which has the effect of conferring the release profile of the pharmaceutical active ingredient to be resistant against the influence of ethanol, whereby the ethanol resistance conferring coating layer comprises at least 70% by weight of a mixture of a polymeric portion a) and an excipients portion b), with the polymeric portion a) is consisting of a water insoluble essentially neutral vinyl polymer or vinyl copolymer and the excipients portion b) is consisting of the excipients b1) 100 to 250% by weight of a non-porous inert lubricant, b2) 1 to 35% by weight of a cellulosic compound, b3) 0.1 to 25% by weight of an emulsifier and additionally or alternatively to b3), b4) 0.1 to 30% by weight of a plasticizer whereby the excipients of the excipients portion b) are each calculated on the dry weight of the polymer portion a).
摘要:
The invention relates to a controlled release pharmaceutical composition, comprising a core, comprising a pharmaceutical active ingredient, whereby the core is coated by an ethanol resistance conferring coating layer which has the effect of conferring the release profile of the pharmaceutical active ingredient to be resistant against the influence of ethanol. The coating layer comprises a polymeric portion consisting of a water-insoluble neutral vinyl polymer or vinyl copolymer and an amino methacrylate copolymer and an excipients portion consisting of a lubricant, an emulsifier, a plasticizer and optionally a cellulosic compound.