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:
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:
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:
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 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.
摘要:
The polyester resin impregnating and coating solution comprises polyesters having structures of the formula (I) where n is from 0 to 10 and where the solution is essentially free from monomers containing acrylic, vinylic or allylic unsaturation and where the solvent employed preferably comprises aliphatic saturated C2-6 alcohols, C3-6 ketones or C3-6 carboxylic esters or mixtures thereof, the proportion of the solvent being from 5 to 60% by weight of the overall polyester resin impregnating and coating solution.
摘要:
The present invention relates to coating compositions for flat assemblies, hybrids, SMD assemblies, comprising at least one binder or binder mixtures which are curable at 60° C.-120° C., preferably at 70° C.-110° C., more particularly at 80° C.-90° C., and also to a process for preparing them and to their use for flat assemblies in electronics, hybrids, SMD assemblies and assembled printed circuit boards.
摘要:
The invention relates to mixtures of preferably from 80 to 99.9% by weight, based on the mixture, of a solution S1 comprising one or more polyamidocarboxylic acids and preferably from 0.1 to 20% by weight, based on the mixture, of a solution S2 comprising one or more, preferably primary, diamines and one or more tetracarboxylic acid diesters, processes for producing polyimide coatings using such mixtures, the use of such mixtures for producing polyimide coatings, and also polyamide-coated articles obtainable using such mixtures.
摘要:
The invention relates to a process for coating metal strip by the coil coating process using coating materials consisting of high temperature resistant systems (polyesterimides, polyamidocarboxylic acids, polyamidimides, polyhydantoins and polybismaleimides), pigments and/or fillers, suitable auxiliary substances and additives as well as solvents or solvent mixtures. The coating material is used in a one-coat or two-coat application, only polyesterimides and polyhydantoins being used for the primers as high temperatures resistant systems, while any of the high temperature resistant systems listed are used in the topcoat.The metal strip coated in this manner possesses good formability, good hardness, outstanding anticorrosion characteristics, outstanding resistance to chemicals, solvents, water, oil, shock and prolonged high temperatures, outstanding adhesion and resistance to stone impact, and is particularly suitable for the production of exhausts, silencers, exhaust air ducts, furnace and radiator claddings, grill utensils and other components exposed to high temperatures.