摘要:
A particulate metal oxide having the mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.
摘要:
Described herein are embedded pigments consisting of a labile chromophore englobed in a coating of refractory and transparent material formed by nanomolecular particles, also described are oxides of refractory and transparent materials in the form of nanoparticles and their use for coating labile chromophores or ceramic surfaces.
摘要:
A method of increasing the hydrophobicity of solid materials. The inventive method comprises the steps of: (a) metal ion activating the surface of a solid substrate material to provide reactive metal sites on the surface and (b) chemically bonding a surfactant to the surface at the reactive metal sites. Titanium dioxide pigments and other particulate property modifiers treated in accordance with the inventive method are more readily dispersed in polymer compositions.
摘要:
A heat-resistant pigment can be produced by forming a dense and uniform coating on the surface of the pigment by contacting a hydrophilic pigment with a metal oxide in at least partly water-miscible solvent.
摘要:
In the production of annealed products such as inorganic pigments wherein pigment-forming starting materials are mixed, optionally with the addition of auxiliary substances, thereafter annealed, optionally ground, washed and then dried, the improvement which comprises adding water to the mixture of pigment-forming materials to form an aqueous suspension containing at least about 10% by weight of H.sub.2 O, and applying said suspension to the surface of a hearth which has been heated to at least about 500.degree.C, thereby to heat said materials and to effect annealing. Advantageously the hearth is a horizontal, flat ring rotating about its center and in the course of one rotation of the ring the applied material is heated to the temperature of formation of the desired annealed product, calcined and removed from the surface of the ring before the one rotation has been completed.
摘要:
CDSE AND CDS-SE PHOTOCONDUCTORS DOPED WITH A IB GROUP ELEMENT SUCH AS COPPER OR SILVER AS ACTIVATOR AND AT LEAST EITHER ONE OF BROMINE AND IODINE AS COACTIVATOR. SUCH PHOTOCONDUCTORS ARE SUPERIOR TO THE CONVENTIONAL CDSE AND CDS-SE ONES DOPED WITH CHLORINE AS COACTIVATOR IN RESPECT OF THE SENSITIVITY ESPECIALLY IN THE LONGER WAVELENGTH RANGE.
摘要:
The disclosure provides, inter alia, formulations comprising cerium (III) carbonate, and processes for producing cerium (III) carbonate. In embodiments, the disclosure provides methods for passivating photodegradation of organic compounds using cerium (III) carbonate.
摘要:
Provided are construction material granules. In one embodiment, the granules include a core enclosed by a layer comprising a conductive material and a layer comprising a dielectric material. Also provided are related methods of constructing such materials.