Abstract:
An optical nanocomposite material has a nanoparticulate filler dispersed in a host plastic material. According to the method of making the nanocomposite material, a predetermined temperature sensitive optical vector, such as refractive index, of the plastic host material and nanoparticulate filler are directionally opposed resulting in a nanocomposite material having significantly improved stability of the refractive index with respect to temperature.
Abstract:
Coating compositions are provided which are formed from components comprising (a) at least one polysiloxane comprising at least one reactive functional group; (b) at least one reactant comprising at least one functional group that is reactive with at least one functional group selected from the at least one reactive functional group of the at least one polysiloxane and at least one functional group of at least one reactant; and (c) a plurality of particles, wherein each component is different, and wherein the at least one reactive functional group of the at least one polysiloxane and the at least one functional group of the at least one reactant are substantially nonreactive with the particles. A multi-component composite coating composition formed from a basecoat and a topcoat deposited from the curable coating composition also is provided. The multi-component composite coating compositions of the invention provide highly scratch resistant color-plus-clearcoatings capable of retaining scratch resistance after weathering.
Abstract:
The compositions described include micronized zinc oxide UV blocking agents with at least one organic UV protective compound. Premix compositions are provided for imparting improved UV resistance to paints, coatings, finishes and plastic articles comprising both micronized inorganic zinc oxide and organic UV protective compounds suitable for easy later inclusion into paint, coating, finish and plastic articles formulations.
Abstract:
The invention relates to a polymeric, semicrystalline thermoplastic material containing nucleating particles with a size smaller than 100 nm in dispersed form and to the molded parts produced using said material.
Abstract:
The invention relates to a single or multi-layered film (I) made from copolyamide with nanoscale nucleating particles (P) dispersed therein. Said film is characterized in that the smallest components (B) of the particles (P) forming a rigid unit in the dispersion have an extension of less than 100 nm in at least one randomly selectable direction for each component (B) based on a weighted average of all components. Crystalline structures departing from the surface of the particles (P) are formed after the layer (I) is cooled from its fully molten state at a cooling rate ranging from to 10° to 20 °C per minute. The percentage by weight of the particles (P) in relation to the total weight of the copolyamide forming the layer (I) ranges from 10 ppm to 2000 ppm. The polyamide composition forming the layer (I) is selected from the group containing one or more homopolyamides and/or copolyamides, of which at least one polyamide contains aromatic monomers so that the portion of aromatic monomers in relation to the total molar percentage of the polyamide composition is no less than 3 % and no more than 15 % or from the group containing one or more aliphatic polyamides having as mixture a DSC melting point with a cooling rate of 10K/min under 205 °C.
Abstract:
A method for preparing nanoparticles for use, from a mixture of nanoparticles with another material, the method comprising washing the mixture with a solvent in which the nanoparticles are soluble to remove the said other material and form a solution of nanoparticles in the solvent.
Abstract:
Kompozice založená na polyamidu obsahující aditiva, jeho antioxidant, UV pohlcovač, UV stabilizátor, vysrážený syntetický silikagel, který má částice o velikosti nanometrů a nanočástice stříbra, vyznačující se tím, že obsahuje 0,2 až 1,0 hmotnostního zlomku stabilizačních aditiv, přičemž se jako antioxidant použije derivát bráněného fenolu, jako UV absorbér se použije derivát benzotriazolu vzorce 2, a jako UV stabilizátor se použije sloučenina ze skupiny aromatických aminů vzorce 3, a kompozice obsahuje 2 až 10 hmotnostního zlomku vysráženého syntetického silikagelu s částicemi ve velikosti nanometrů.
Abstract:
A coating composition that is capable of absorbing UV or UV and visible light is disclosed. The coating composition includes a carrier and a pigment dispersed in the carrier. The pigment includes nanoparticles of a UV light absorber such that the coating composition is capable of absorbing UV light up to 360nm or nanoparticles of a UV and visible light absorber such that the coating composition is capable of absorbing UV and visible light up to 550nm, and the absorber includes an inorganic material.