摘要:
The invention relates to a method for preparing synthetic mineral particles with formula (AlyM1-y)2(SixGe1-x)2O5(OH)4, wherein M designates at least one trivalent metal selected from the group made up of gallium and the rare earths, which comprises the following steps: preparing a gel which is a precursor of said synthetic mineral particles by a co-precipitation reaction of at least one salt of metal selected among aluminium and M with at least one silicon source selected from the group made up of potassium metasilicate, sodium metasilicate, potassium metagermanate and sodium metagermanate, the molar ratio of (AlyM1-y) to (SixGe1-x) during the preparation of said precursor gel being equal to 1, at least one base being added during said co-precipitation reaction; and performing a solvothermal treatment of said precursor gel at a temperature of 250° C. to 600° C.
摘要:
The thermally conductive composite oxide of the present invention has excellent physical properties, such as high thermal conductivity, water resistance, acid resistance, electric resistance, and electric insulation, required for coating films, films, and articles thereof. Paints or resins including the composite oxide can provide coating films, films, and articles having such properties without treating of a surface, etc. The composite oxide has a spinel structure and contains aluminum as a main metal component and at least one metal other than aluminum, which is magnesium, zinc, calcium, and/or strontium, and has a ratio (b mol)/(a mol) in a range of 0.1 or more and 1.0 or less, where the ratio (b mol)/(a mol) is a number of moles (b) of the metal other than aluminum to that of moles (a) of an aluminum element derived from an alumina-based compound. The thermally conductive composite oxide has Mohs hardness of less than 9.
摘要:
There is provide a curable composition comprising a) one or more reactive components that cure upon exposure to suitable conditions, and b) a sulfur impregnated particulate solid which acts as a release agent for sulfur during the cure process; and c) optionally a solvent.
摘要:
The invention presented concerns a process for the manufacture of coated, nano-scale, hydrotalcites, where the individual, primary, nano-scale hydrotalcite particles are coated. In order to obtain the corresponding hydrotalcite particles in coated, nano-scale form, the additive precipitation reaction is employed invention-related. Every primary particle indicates its own coating in this case. In a further aspect, the registration is directed toward coated primary, nano-scale, hydrotalcite particles, in particular obtainable in accordance with the invention-related process. A further aspect of the invention is directed toward composites containing nano-scale hydrotalcites, in particular hydrotalcites manufactured in accordance with the invention presented. Finally the registration presented is directed towards compositions containing mixtures of magnesium hydroxide and hydrotalcite.
摘要:
A dye loaded zeolite composite material comprises a plurality of zeolite crystals each having a plurality of straight through uniform channels extending between the proximal face and the distal face and having a channel axis parallel to and a channel width transverse to a longitudinal crystal axis A. Each channel contains a substantially linear arrangement of dye molecules comprising first and second dye molecules having an elongated shape with a longitudinal extension exceeding said channel width and a lateral extension not exceeding said channel width. Each dye molecule consists of a chromophore moiety arranged between a pair of terminal moieties, wherein: the chromophore moieties of the first and second dye molecules are substantially identical, the terminal moieties of the first dye molecules have a lateral extension larger than half of the channel width, the terminal moieties of the second dye molecules have a lateral extension smaller than half of the channel width, the linear arrangement of dye molecules comprises at least one pair of second dye molecules adjacent each other.
摘要:
APs are made by binary condensation via base-to-acid or acid-to-base routes. In the base-to-acid route, an aluminum hydroxide slurry is added to phosphoric acid that reacts to produce an aluminum phosphate condensate. In the acid-to-base route, phosphoric acid is added to an aluminum hydroxide slurry that reacts to produce an aluminum phosphate condensate. In an alternative base-to-acid route, an acidic aluminum phosphate is first made by adding phosphoric acid to a first amount of aluminum hydroxide slurry, and such acidic aluminum phosphate is added to a remaining amount of aluminum hydroxide slurry to react and produce an aluminum phosphate condensate. The reactions can be controlled to form an in-situ layered aluminum phosphate. So-formed APs can be amorphous, crystalline, or a combination thereof, and have low oil absorption and surface area, making them particularly useful in such end-use applications as extender pigments in coating compositions, replacing up to 70 wt % of TiO2.
摘要:
An object of the present invention is to provide a thermally conductive composite oxide that can realize physical properties required for coating films, films, and molded products obtained by single use of the thermally conductive composite oxide blended into paints and resin compositions without the need for an improvement measure such as surface treatment and that is excellent in thermal conductivity, water resistance, acid resistance, and electric insulation. The object is achieved by a thermally conductive composite oxide and the production process thereof, the thermally conductive composite oxide being a composite oxide having a spinel structure and containing aluminum as a main component metal and at least one metal other than aluminum, and in the thermally conductive composite oxide, the metal other than aluminum is at least one selected from the group consisting of magnesium, zinc, calcium, and strontium, the ratio, (b mol)/(a mol), of the number of moles (b) of the metal other than aluminum to the number of moles (a) of an aluminum element in the alumina-based compound is 0.1 or more and 1.0 or less, and the Mohs hardness of the thermally conductive composite oxide is less than 9.
摘要:
The current technology is directed to an iron-substituted copper aluminum delafossite pigment, as well as a gallate version of the same. In particular, the materials may be defined as iron-substituted copper aluminum delafossite, CuFexAl1-xO2 and the gallate, CuFexGa1-xO2 where X=0.01 to 1.00, for example, CuFe0.15Al0.85O2, and CuFe0.15Ga0.85O2. The pigments are dark-brown to black, absorb most light in the visible spectrum, but have low absorbance and high reflectance in the near-infrared regions, specifically light from about 700 nm-2500 nm.
摘要:
Disclosed herein is a process for modifying a layered double hydroxide (LDH), the process comprising a. providing a material comprising a layered double hydroxide of formula: [Mz+1-xM′y+x(OH)2]q+(Xn−)q/n.bH2O wherein M and M′ are metal cations, z is 1 or 2, x is 0.1 to 1, b is 0 to 5, y is 3 or 4, X is an anion, n is 1 to 3 and q is determined by x, y and z; b. optionally washing the material at least once with a mixture of water and a mixing solvent miscible with water; and c. washing the material obtained in a. or b. at least once with at least one first solvent, the first-solvent being miscible with water and having a solvent polarity P′ in the range of 3.8 to 9 to obtain a modified layered double hydroxide.
摘要:
A process for the preparation of composite filler particles, comprising: (a) coating a particulate filler having a median particle size (D50) of from 1 to 1200 nm; (b) agglomerating the coated particulate filler, for providing a granulation of the coated particulate filler wherein the granulation contains the coated particulate filler particles whereby the at least one coating layer may be crosslinked by crosslinking groups obtained by reacting the reactive groups and optionally a further crosslinking agent.