Abstract:
The present invention relates to a thermoplastic moulding composition for the production of mouldings that can be metalized by a currentless and/or electroplating method, comprising, based on the total weight of components A, B, C, D and E, which gives a total of 100% by weight, a from 20 to 98% by weight of a thermoplastic polymer as component A, b from 1 to 30% by weight of carbon nanotubes as component B, c from 1 to 70% by weight of electrically conductive particles whose average particle diameter is from 0.01 to 100 µm as component C, d from 0 to 10% by weight of a dispersing agent as component D, and e from 0 to 40% by weight of fibrous or particulate fillers or mixtures of these as component E. The invention further relates to methods for the production of mouldings metalized by a currentless and/or electroplating method, to metalized mouldings, to the use of metalized mouldings, and also to electrically conducting components, EMI shielding systems, such as absorbers, attenuators or reflectors for electromagnetic radiation, and to gas barriers and decorative parts comprising these articles.
Abstract:
The invention relates to a device for electroplating at least one electrically conductive substrate (8), or an electrically conductive structure situated on a non-conductive substrate (8). Said device comprises at least one bath, an anode and a cathode (2). The bath contains an electrolyte solution, which comprises at least one metal salt and from which metal ions are deposited on electrically conductive surfaces of the substrate, as the cathode is brought into contact with the surface of the substrate to be coated and said substrate is conveyed through the bath. The cathode comprises at least one strip (2) with at least one electrically conductive segment (12) and is guided around at least two rotating shafts (3). The invention also relates to a method for electroplating at least one substrate that is carried out in a device according to the invention. According to said method, to produce the coating, the strip lies on the substrate and circulates at a speed corresponding to the speed at which the substrate is conveyed through the bath. The invention further relates to the use of said device for electroplating electrically conductive structures situated on an electrically non-conductive support.
Abstract:
Films or plates made of a plastic mixture and capable of being metal-plated are disclosed, comprising, in relation to the total weight of components A, B, C and D, which add up to 100 % by weight: (a) 5-50 % by weight of a thermoplastic polymer as component A; (b) 50-95 % by weight of a metal powder having an average particle diameter ranging from 0.01-100 µm (determined by the method defined in the description), the metal having a more negative normal potential in an acid solution than silver, as component B; (c) 0-10 % by weight of a dispersant as component C; and (d) 0-40 % by weight fibrous or particulate fillers or their mixtures as component D. The elongation at tear of component A (determined by the method defined in the description) is 1.1-100 times higher than the elongation at tear of the plastic mixture comprising components A, B and optionally C and D (determined by the method defined in the description). The tensile strength of component A (determined by the method defined in the description) is 0.5-4 times higher than the tensile strength of the plastic mixture comprising components A, B and optionally C and D (determined by the method defined in the description). Also disclosed are thermoplastic moulding compounds for producing these films or plates that can be metal-plated, a granulate comprising these thermoplastic moulding compounds, stratified composite films or plates and mouldings comprising these films or plates, metal-plated polymer bodies comprising these films or plates, stratified composite films or plates and mouldings, processes for producing these objects, the use of these objects as EMI shieldings and absorbers, dampers or reflectors for electromagnetic radiation, oxygen scavengers, electroconducting components, gas barriers, and decorative elements comprising these objects.
Abstract:
The invention relates to a dispersion for applying a metal layer to an electrically non-conductive substrate containing an organic binder component, a metal component with different metals and/or metal particle shapes, and a solvent component. The invention further relates to methods for producing said dispersion, methods for creating an optionally structured metal layer with the aid of the dispersion, the obtained substrate surfaces, and the use thereof.
Abstract:
The invention relates to a method for producing alkylpolyalkylene glycol esters of monoethylenically unsaturated carboxylic acids by esterifying (a) monoethylenically unsaturated carboxylic acids with (b) polyalkylene glycols which are closed on one side by terminal groups, in a substance in the presence of polymerisation inhibitors and esterification catalysts at temperatures of 160 DEG C at the most. The esterification is first carried out at atmospheric pressure or at pressures of up to 50 bar, the water produced during the esterification is then distilled from the reaction mixture at a pressure of between 10 and 500 mbar, and the esterification is then continued at atmospheric pressure or at pressures of up to 50 bar.
Abstract:
Disclosed is a method for producing structured, electrically conductive s urfaces on a substrate. Said method comprises the following steps: a) a base layer containing particles that can be coated in an electroless manner and/ or be electro-plated is structured on the substrate by removing the base lay er according to a predefined structure with the help of a laser; b) the surf ace of the particles that can be coated in an electroless manner and/or be e lectro-plated is activated; and c) an electrically conductive coating is app lied to the structured base layer.
Abstract:
A magnetorheological formulation which comprises at least one base oil, at least one magnetizable particle, a at least one dispersant and a at least one thixotropic agent is described.
Abstract:
A method for the production of metallised textile sheet (I) involves (A) printing the textile with a formulation containing at least one metal powder (a) with a greater negative standard potential than hydrogen in the electrochemical displacement series, (B) subjecting the fabric to thermal treatment in one or more stages and (C) depositing another metal on the fabric. Independent claims are included for (1) metallised textile sheet (I) obtained by this method (2) heatable textiles, textiles which convert electricity into heat, textiles which can screen electric fields, textile-integrated electronics and RFID textiles made from (I) (3) printing formulations containing metal powder (a), binder(s) (b), emulsifier(s) (c) and optionally rheology modifier(s) (d) (4) a method for the production of such formulations by mixing the components .
Abstract:
Polymers containing acid groups are modified by reaction of(a) polymers which comprise at least 5% by weight of a copolymerized monoethylenically unsaturated monomer containing acid groups, have molar masses of from 200 to 100,000 and are obtainable by free-radical polymerization of monoethylenically unsaturated acids in aqueous solution in the presence or absence of other monoethylenically unsaturated monomers and in the presence of at least 4% by weight, based on the monomers used in the polymerization, of a water-soluble sulfur compound in which the sulfur is in the oxidation state +4,with(b) polyalkylene glycols which are end-capped at one end, alkylpolyalkylene glycol amines or mixtures thereof, or mixtures of at least one of the two compounds specified with up to 30% by weight, based on the mixtures, of ammonia, amines, alcohols, hydroxycarboxylic acids or aminocarboxylic acidsat up to 250° C.