Abstract:
The invention is directed to an antimicrobial metal composite formed by vaporizing an antimicrobial metal or antimicrobial metal salt such as silver, copper or salts thereof using an plasma system and cooling the formed vapor in the presence of a fluidized gas of filler powder. Alternatively, the filler or a filler precursor is entrained with the antimicrobial metal or antimicrobial metal precursor and vaporized and then upon cooling the antimicrobial metal vapor and filler vapor condense to form the composite. The composite shows high antimicrobial activity and can be incorporated into or onto polymers, coatings, textiles, paper, gels (for example for wound care), lubricants, adhesives and cosmetics or pharmaceutical, especially medical devices.
Abstract:
Polymer substrates are marked by a method in which certain graphite nanoplatelets are incorporated into the polymer composition, such as a coating or plastic article, prior to marking the composition by exposing selected portions of the substrate to a heat source, typically a laser. Additional pigments may also be present allowing for the production of a variety of different types of markings.
Abstract:
The present invention relates to novel pigment mixtures comprising at least two different particulate components A and B. The first component A comprises titanium suboxide(s), a titanium oxynitride or a titanium nitride species. Component B particle comprises inorganic, or organic pigments. The titanium suboxide particles display a bluish metallic luster, are new and form a further aspect of the present invention. When combined with particles from component B such as variously coated micas, for example, the bluish or bluish/black metallic color effect from component A leads to special color effects in the various mixtures.
Abstract:
The invention relates to the use of tungsten oxide or of tungstate to increase the heat-input amount of near infrared radiation in processes selected from laser welding of plastics, NIR curing of coatings, drying of printing inks, fixing of ink toners to a substrate, heating of plastic preforms, laser marking of plastics or paper.
Abstract:
Disclosed are graphite nanoplatelets produced by a process which comprises thermal plasma expansion of intercalated graphite to produce expanded graphite followed by exfoliation of the expanded graphite, where the exfoliation step is selected from ultrasonication, wet milling and controlled caviation and where greater than 95% of the graphite nanoplatelets have a thickness of from about 0.34 nm to about 50 nm and a length and width of from about 500 nm to about 50 microns. The intercalated graphite is intercalated for example with a mixture of sulfuric and nitric acids. The plasma reactor for example employs an RF induction plasma torch. All three exfoliation methods are performed in an organic solvent or water. The exfoliation steps may be performed with the aid of for example a nonionic surfactant. Also disclosed are plastic, ink, coating, lubricant or grease compositions comprising the graphite nanoplatelets.
Abstract:
The present invention relates to novel pigment mixtures comprising at least two different particulate components A and B. The first component A comprises titanium suboxide(s), a titanium oxynitride or a titanium nitride species. Component B particle comprises inorganic, or organic pigments. The titanium suboxide particles display a bluish metallic luster, are new and form a further aspect of the present invention. When combined with particles from component B such as variously coated micas, for example, the bluish or bluish/black metallic color effect from component A leads to special color effects in the various mixtures.
Abstract:
Disclosed are natural products composites protected against the deleterious effects of microorganisms comprising at least one natural product, at least one thermoplastic resin, and an antifungal agent. The composites are further advantageously protected against weathering and color formation by the incorporation therein of at least one light stabilizer and at least one compound selected from the group consisting of the oxides, hydroxides or silicates of Ca, Mg, Al and Zn. The light stabilizers are selected from the group consisting of the ultraviolet light absorbers and the sterically hindered amines. The metal oxide is for example CaO. The natural products are for example wood flour, flax, hemp, jute, kenaf, or rice husk. The thermoplastic resin is for example polyethylene or polypropylene. The antifungal agent and potential coadditives are incorporated via melt processing such as extrusion, co-kneading, pultrusion and injection molding. The antifungal agent is for example thiabendazole.
Abstract:
The invention is directed to an antimicrobial metal composite formed by vaporizing an antimicrobial metal or antimicrobial metal salt such as silver, copper or salts thereof using an plasma system and cooling the formed vapor in the presence of a fluidized gas of filler powder. Alternatively, the filler or a filler precursor is entrained with the antimicrobial metal or antimicrobial metal precursor and vaporized and then upon cooling the antimicrobial metal vapor and filler vapor condense to form the composite. The composite shows high antimicrobial activity and can be incorporated into or onto polymers, coatings, textiles, paper, gels (for example for wound care), lubricants, adhesives and cosmetics or pharmaceutical, especially medical devices.