Abstract: Compositions comprising (a) an epoxy resin, (b) a hardener for the epoxy resin, (c) a product of the reaction of a microgel containing carboxylic acid groups and a nitrogen-containing base, and (d) an electrically conducting filler combination comprising, based on the total amount of filler, at least 75% by weight of graphite, are particularly suitable for producing biopolar plates.

Abstract: Compositions comprising (a) an epoxy resin, (b) a hardener for the epoxy resin, (c) a product of the reaction of a microgel containing carboxylic acid groups and a nitrogen-containing base, and (d) an electrically conducting filler combination comprising, based on the total amount of filler, at least 75% by weight of graphite, are particularly suitable for producing bipolar plates.

Abstract: A composition comprising (a) an epoxy resin having, on average, more than one 1,2-epoxy group per molecule, (b) a polyol as epoxy resin curing agent and (c) a solid microgel-amine adduct as accelerator has high latency, good storage stability and a wide processing window.

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: 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 to cross-section whi

Abstract: A two-component system for producing two or more different curable mixtures in which the first component A is common to each mixture and comprises:1. a liquid epoxy2. an acid anhydride hardener and3. at least one fillerand the second component B is selected from two or more different components B, each of which comprises:1. an accelerator, and optionally2. a colourant, and optionally3. a non-volatile solvent/extender for the accelerator4. a flexibiliser for the epoxy-anhydride cure5. a acid anhydride hardener.