Abstract:
Liquid silicone rubber base polymer compositions having improved color are prepared by reaction of fumed silica reinforcing filler with a silazane, and without drying the silazane-treated filler, an aliphatically unsaturated silicone is added, heated to above 80°C, and then further aliphatically unsaturated silicone is added. The compositions have improved whiteness and color reproducibility.
Abstract:
The invention provides a substrate in powder or fibre form whose surface is treated with a silicone compound, characterised in that the surface has been treated with an emulsion containing the silicone compound, water and a ethylene oxide/propylene oxide block copolymer.
Abstract:
The present invention relates to an antireflective coating composition which is divided into at least two layers through phase separation after single layer coating, and more specifically, to an antireflective coating composition comprising hollow particles surface-coated with a fluorine-based compound having a refractive index of 1.3-1.4 and a surface tension of 10-25 mN/m, an antireflective film prepared therefrom, and a preparation method thereof. The antireflective coating composition according to the present invention allows at least two layers to be spontaneously formed even with one coating process by smooth phase separation within a coating layer. Particularly, since the interface of each layer formed by phase separation is actually chemical bonded or crosslinked, delamination of each layer can be minimized. In addition, a film having excellent scratch resistance and antireflection can be prepared with a more simplified method by using the antireflective coating composition according to the present invention.
Abstract:
The invention provides systems and methods for removing a target oil from an aqueous fluid stream using a capture medium. In embodiments, the capture medium can comprise an anchor substrate and a modifier technology supported on the anchor substrate, where the modifier technology complexes with the oil to form a removable complex.
Abstract:
A transparent polycrystalline ceramic having scattering and absorption loss less than 0 2 /cm over a region compπsing more than 95% of the originally densified shape and a process for fabrication by hot pressing The ceramic can be any suitable ceramic such as yttria (Y203) or scandia (SC203) and can have a doping level of from 0 to 20% and a grain size of greater than 30 micron, although the grains can also be smaller than 30 micron A process for making a transparent polycrystalline ceramic in accordance with the present invention, ceramic nanoparticles can be coated with a sintering aid to minimize direct contact of adjacent ceramic powder particles and then baked at high temperatures to remove impurities from the particles The thus coated particles can then be densified by hot pressing into the final product The invention further provides a transparent polycrystalline ceramic solid-state laser mateπal and laser.
Abstract:
A particle is formed from a dispersion and includes a compound and a metal disposed on the particle. The compound has the chemical formula R-Si-H. In this formula, R is an organic or inorganic moiety. The particle is also included in a corresponding dispersion. The particle is formed from a method that includes the step of forming the dispersion. The method also includes the step of disposing the metal on the particle.