摘要:
Solvent composition comprising ethanol, aromatic hydrocarbon or hydrocarbon mixture, high-boiling solvent, wire enamel formulation based on polyvinyl formal and comprising the solvent composition, preparation process and use.
摘要:
Compositions comprising at least one epoxy resin and/or reactive diluents, at least one hardener for the at least one epoxy resin, at least one curing indicator, wherein the color of the composition changes depending on the curing degree, a process for determining sufficient cure of a composition comprising providing a composition comprising at least one epoxy resin and a hardener for the epoxy resin, adding a curing indicator, applying curing conditions to the colored composition until the composition changes its color and use of polymeric colorants as curing degree indicator, wherein the curing indicator is a polymeric colorant consisting of chromophores which are chemically bound to polymers having reactive groups.
摘要:
A process is proposed for preparing hydroxyaromatics by heterogeneous catalytic reaction of hydroxyaromatics with C1-C4-alkanols in a microreactor (10), comprising the steps of: a) introducing the hydroxyaromatic and at least one compound selected from the group consisting of C1-C4-alkanols as reactants into at least one inlet orifice (22) of the microreactor (10) comprising at least one microreactor unit (18), b) passing the reactants through at least one microreactor unit (18) of the microreactor (10), said unit comprising a multitude of microchannels (28), said microchannels (28) having a lateral extent of less than 1 mm, and a heterogeneous catalyst being incorporated in the microchannels (28) for conversion of the reactants, c) passing the hydroxyaromatics prepared out through at least one outlet orifice (24) of the microreactor (10).
摘要:
Solvent composition comprising ethanol, aromatic hydrocarbon or hydrocarbon mixture, high-boiling solvent, wire enamel formulation based on polyvinyl formal and comprising the solvent composition, preparation process and use.
摘要:
Cutting-off device for viscous stock materials packed in can-like containers, more particularly filler materials and putties and hardener pastes. A device in the form of a disposable article for the simultaneous cutting-off of filler materials and hardener pastes dispensed from can-like containers can be mounted upon the dispensing apertures of the containers and includes a mounting plate (10) with connection pieces (12,32) and with dispensing apertures constructed within the upper region in the mounting plate and of a slider (40) displaceably retained and guided on the mounting plate (10), which, in dependence of the assumed position, closes or unblocks the dispensing apertures, and of two cutters that are moveable into the areas of the dispensing apertures.
摘要:
An allyl amine compound such as an allyl dialkyl amine is prepared by the reaction of ammonia or a water soluble amine with an allyl halide in the presence of an alkali metal or alkaline earth metal hydroxide or carbonate using a two-phase reaction system comprising water and a water-immiscible organic liquid. The allyl amine product is of an exceptionally high purity and contains relatively small amounts of salts. When the reaction method is employed to prepare an allyl dialkyl amine, the allyl dialkyl amine can effectively be quaternized to prepare a pure diallyl dialkyl ammonium compound at high yields.
摘要:
An apparatus is described for the storage of the fibers of glass-fiber cables (23) in distribution devices in a telecommunication network, such as, for example, in casings (9) of end distributors or distribution frames (10). In order to be able to store, in a break-safe and manipulatable manner a splice reserve, wound up as, for example, in a splice cassette (58) with a movable feed cable (21), at least one cassette box (1), is provided and which is designed to receive a cassette (20). The box (1) is stored in a casing (9, 10) of the distribution device, and is provided with a removal opening (7). The box (1) can be moved from an essentially vertical storage position in the casing (9, 10) to an essentially horizontal removal position with the removal opening (7) located at the top. With this structure, the ends of the glass-fiber cables (23) are, on the one hand, well-housed inside the casing (9, 10) when the box (1) is in its vertical storage position and, on the other hand, when box (1) is in its horizontal removal position easily removed through the top-located removal opening (7).
摘要:
A process is proposed for preparing hydroxyaromatics by heterogeneous catalytic reaction of hydroxyaromatics with C1-C4-alkanols in a microreactor (10), comprising the steps of: a) introducing the hydroxyaromatic and at least one compound selected from the group consisting of C1-C4-alkanols as reactants into at least one inlet orifice (22) of the microreactor (10) comprising at least one microreactor unit (18), b) passing the reactants through at least one microreactor unit (18) of the microreactor (10), said unit comprising a multitude of microchannels (28), said microchannels (28) having a lateral extent of less than 1 mm, and a heterogeneous catalyst being incorporated in the microchannels (28) for conversion of the reactants, c) passing the hydroxyaromatics prepared out through at least one outlet orifice (24) of the microreactor (10).
摘要:
The invention provides an alternative improved use of using screws, spikes and nails in joining pieces of wood. The intent of making use of the above named devices is to use a simple procedure to join separate pieces of wood using the Nail Screw or Twin Spike or Twin Nail. This is easily accomplished by using a Drill and Bit as the primary method by drilling the Nail Screw end into the wood. The secondary method would be to hammer the Twin Spike or Twin Nail using a simple tool fitting over the shank. For either method, in most cases, pre drilling would be appropriate. When using the Nail Screw, pre drilling would simplify the wood joinery. The end result would be that in most cases no metal part is visible after completion of the task.
摘要:
The invention relates to an overcoat lacquer containing a) at least one binding agent containing alkyd resins made from tris-(2-hydroxylethyl)-isocyanurate, 2,6-naphthaline dicarboxylic acid, drying fatty acids, and, optionally, other components known from alkyd resin chemistry, b) at least one solvent or at least one technical solvent or mixture thereof based on hydrocarbon and c) at least one siccative or at least one mixture of siccatives or several anti-skin agents.