摘要:
In an advantageous process for the production of mouldings from expandable graphite, a liquid is first added to the expandable graphite and the resulting moist preparation form of the expandable graphite is heated in moulds to temperatures above 180.degree. C.
摘要:
New sheet-like structures which are capable of intumescence contain a layer of granular intumescence material between two textile sheet-like structures which are stitched or sewn to one another.
摘要:
Moulded articles are produced by heating expandable graphite, in which the expandable graphite is first pre-expanded at 140.degree. to 450.degree. C. until a bulk density of 30 to 500 g/l has been reached, at least 50% by volume of a mould is then filled with the graphite thus pre-expanded, and the expansion of the graphite is then completed in the mould by heating to temperatures in the range from 300.degree. to 700.degree. C.
摘要:
The invention relates to a self-hardening material for supporting bandages which is packaged with exclusion of moisture and consists of an air-permeable, flexible carrier material which is impregnated and/or coated with a compound possessing at least 2 NCO groups. The self-hardening material has a greatly improved shelf life by being stored substantially oxygen-free in an air-tight pack.
摘要:
To produce mouldings for screening against electromagnetic radiation it is highly advantageous to use metal fibre-containing composite materials as obtained by impregnating a bundle of continuous metal filament fibres with a polymeric adhesion-promoting substance, sheathing the resulting compact precursor with a thermoplastic matrix and cutting the resulting extrudate of composite material into defined lengths.The composite materials can be used as such or together with thermoplastic granules.
摘要:
Materials based on gypsum and organic additives are improved if they contain polyethers and, if desired, polymers. They can be used in a wide range of areas, for example as slabs in the building sector and for improving plasters, mortars, insulating materials and other construction compositions, casts and/or moulds.
摘要:
Formulations which contain a water-dispersible polymer, a metallization catalyst, if appropriate fillers, if appropriate other constituents and water are outstandingly suitable for the pretreatment of various substrate surfaces for the purpose of subsequent metallization in a currentless metallization bath.
摘要:
An improved process for depositing strongly adhering metallic coatings on substrate surfaces by wet chemical methods by treating the surfaces with a primer before activation.The materials produced by the process are eminently suitable for the shielding of electromagnetic waves.
摘要:
An elegant method for the production of printed circuit boards possessing good electrical and mechanical properties comprises activating baseplates with a solution of complex compounds of elements of sub-group I or VIII of the periodic table, then applying a resist layer, exposing this partially according to a resist pattern, dissolving away the covered parts of the resist layer with a solvent, and metallizing the bared parts in a wet-chemical metallization bath in the absence of a current.
摘要:
A process suitable for the fully additive technique for the electroless partial metallization of substrate surfaces consists in treating the surface with photosensitive silver(I) compounds (e.g. carboxylic acid salts), partially exposing the silver(I) compounds left behind on the surfaces, if necessary intensifying the exposure effect and/or exchanging the silver produced during the exposure for nobler metals, and detaching the unexposed silver(I) compounds.