Abstract: Soluble poly(bis-9,9′-fluorenes) comprise identical or different structural repeating units of the formula I, where the two R1s are, independently of one another, H, C1-C18alkyl, C8-C14aryl, C7-C15aralkyl, C1-C18alkoxy, R2—(O—CnH2n)m—O—, C1-C18alkylthio, C1-C18dialkylamino, —C(O)OH, —C(O)O—C1-C18alkyl, —C(O)—N(C1-C18alkyl)2, —SO3H, —SO3—C1-C18alkyl, —SO2—N(C1-C18alkyl)2, C1-C17-alkyl-C(O)—O— or C1-C17alkyl-C(O)—, R2 is H or C1-C12alkyl, n is from 2 to 6 m is from 1 to 12. The polymers can be used either alone or in admixture with at least one additional fluorophore whose absorption band overlaps the emission band (fluorescent emission) of the polymer of the formula I as active radiative layer for light-emitting diodes, VDUs and display elements.

Abstract: A process for impregnating an electrical coil which comprises a winding comprising two or more layers consisting of more than one turn of an electrically conducting wire-form material with a polymer material which electrically insulates the individual turns of the wire-form material from one another with the aid of a thermally curable epoxy resin composition, which composition is solid at room temperature and comprises the following constituents: (a) an epoxy resin which is solid at room temperature, selected from (a1) polyglycidyl ethers based on novolaks; (a2) diglycidyl ethers based on bisphenols, and (a3) mixtures of more than one of components (a1) and (a2); (b) a crosslinking agent for component (a); (c) a suitable accelerator for the reaction of component (a) and component (b); (d) from 15 to 70 percent by weight, based on the overall weight of the composition, of filler selected from (d1) calcium carbonate, (d2) quartz flour, (d3) wollastonite whose particles have an average ratio of length

Abstract: The invention relates to curable compositions comprising a) an epoxy resin, b) an aminic curing agent and c) a curing accelerator, which comprise as curing accelerator c) at least one or more than one compound selected from c1) a compound of formula (I) wherein R1 and R2 are each independently of the other a hydrocarbon radical having from 1 to 12 carbon atoms, c2) a reaction product of a compound of formula (I) with formaldehyde, and c3) a reaction product of a compound of formula (I) with formaldehyde and a phenolic compound, in an amount of from 0.1 to 25% by weight, based on the sum of components a), b) and c), and to a process for the production of cured products using those compositions.

Abstract: The invention relates to Mannich bases prepared using alkyldipropylenetriamines and to addition compounds (adducts) of alkyldipropylenetriamines with acrylonitrile and ethylene oxide or propylene oxide, and to products obtained therefrom by the further addition of epoxy compounds having on average at least one epoxy group per molecule, and to the use of such products as hardeners for curable epoxy resin systems.

Abstract: A powder coating composition of the invention comprises a film-forming polymeric component having a d(v,50) in the range or from 25 to 50 microns or a d(v,70) in the range of from 25 to 70 microns, which composition incorporates by dry-blending at least one appearance-modifying additive component and a further component comprising wax-coated silica or consisting of alumina together with aluminum hydroxide. The appearance-modifying additive may be a gloss-reducing component, a texturing component, a metallic or mica component, a coloring pigment, or a further film-forming polymeric material comparable with the first film-forming polymeric material and differing in coloration therefrom, and the further additive may be alumina together with aluminum hydroxide, wax-coated silica, or a combination thereof. Preferably, no more than 70% by volume of the particles in the film-forming polymeric material are less than 50 microns. A kit of the invention comprises the individual additive components prior to mixing.

Abstract: A process for the manufacture of a flowable granulate by means of spray granulation, which comprises using as starting material a formulation in liquid form comprising (a) a substance or a mixture of substances that is in the form of a waxy or cohesive solid at room temperature, and (b) up to 20% by weight, based on the amount of component (a), of a substance having a specific surface >3 m2/g that is insoluble in component (a), yields granulates that have a narrow particle size distribution and a low dust content and that are stable to storage.