The invention relates to a method for producing hydrophilic silicia moulded bodies, in which i) a mixture containing hydrophilic silicic acid is added at a maximum temperature of 55 C. to hydrophobic means and ii) the mixture obtained in step i) is compacted after a maximum storage time of 30 days to form moulded bodies, iii) during steps ii and iii and until the moulded bodies are used, the temperature is at a maximum of 55 C.

A dispersion that inorganic oxide microparticles may be dispersed at a high concentration in a solvent, a composition for film formation having high transparency, high refractive index and adhesion to a base layer. Inorganic oxide microparticles wherein an amphiphilic organosilicon compound having one or more selected from a polyoxyethylene group, a polyoxypropylene group, or a polyoxybutylene group as a hydrophilic group, and one or more selected from a C.sub.1-18 alkylene group or a vinylene group as a hydrophobic group bonded to a surface of modified metal oxide colloidal particles (C) having a primary particle diameter of 2 to 100 nm, the modified metal oxide colloidal particles wherein a surface of metal oxide colloidal particles (A) having a primary particle diameter of 2 to 60 nm as a nucleus is coated with a coating material (B) including metal oxide colloidal particles having a primary particle diameter of 1 to 4 nm.

Disclosed are a silica sol composition including silica, an anionic dispersant, a cationic dispersant, an epoxy silane coupling agent, and an organic solvent, and a method for preparing the same. In the silica sol composition, a uniform surface modification of silica particles may be achieved by using an anionic dispersant and a cationic dispersant, and it is possible to effectively enhance the compatibility between a silica filler whose surface is modified with an epoxy group and a resin which is an underfill composition.

Disclosed is a coating composition which includes: polyurethane; and amphiphilic nanoparticles having an amine functional group and a fluorine functional group in their structure. Further provided are a polyurethane-silica composite film including e coating composition and a method of preparing the same.

A silane based additive, rubber formulations including the additive and tires having tread portions made with the additive, together with methods of forming those products, are provided. Uncured rubber formulations in accordance with preferred embodiments of the invention comprise (1) a rubbery primary polymer or polymer blend, such as natural rubber and/or synthetic rubber; (2) reinforcing silica filler; (3) a network forming monomer or polymer, especially a thermosetting network forming moiety, for forming a secondary polymeric network; and (4) a silane containing one or more moieties of the aforementioned network forming polymer. In particular networks which can be generated in-situ are preferred. The cured rubber formulation should comprise the silica, having the secondary polymer network coupled thereto, within the rubber matrix, and not directly to the rubber chains via sulfidic linkages.

Disclosed is a coating composition which includes: polyurethane; and amphiphilic silica nanoparticles having an amine functional group and a fluorine functional group in their structure. Further provided are a polyurethane-silica composite film including the coating composition and a method of preparing the same.

The object of the present invention is to provide silica particles which can provide a silica particle dispersion exhibiting excellent uniformity. The present invention is silica particles having an average primary particle diameter d.sub.BET calculated from a specific surface area by a BET method of 1 nm or more and 100 nm or less and a ratio (d.sub.DLS/d.sub.BET) of an average secondary particle diameter d.sub.DLS measured by a dynamic light scattering method to the d.sub.BET of 1.2 or less. The silica particles of the present invention preferably have a coefficient of variation in a particle diameter measured using a transmission electron microscope at a magnification of 200,000 of 20% or less.

Process for the preparation of a particulate dental filler composition, comprising the following steps: (a) introducing a mixture containing (a1) a silica precursor component, and (a2) a solution or dispersion of one or more compounds selected from compounds of aluminum, zinc, titanium, zirconium, tungsten, ytterbium, hafnium, bismuth, barium, strontium, silver, tantalum, lanthanum, tin, boron, and cerium, into a pulsed reactor; (b) converting the silica precursor component and the compounds into a particulate mixed oxide with a pulsed gas flow resulting from flameless combustion; (c) isolating the particulate mixed oxide from the pulsed reactor; (d) optionally subjecting the particulate mixed oxide to a heat treatment step; and (e) treating the optionally heat-treated particulate mixed oxide with a silane treatment agent for obtaining a particulate dental filler composition.

Described herein is a method of using solid particles having a surface functionalized with a terminal cyclocarbonate group to neutralize an odor from ammonia and primary or secondary amines. Also described herein are perfuming compositions and perfuming consumer products that include malodor neutralizers.

Methods for synthesizing a polymer functionalized nanoparticle are provided. The method can include attaching a polymeric chain to a nanoparticle, wherein the polymeric chain comprises a plurality monomers, wherein the plurality of monomers comprise alkyl (meth)acrylate monomers. Polymer functionalized nanoparticles are also provided that comprise a nanoparticle defining a surface, and a polymeric chain covalently bonded to the surface of the nanoparticle, wherein the polymeric chain comprises a poly alkyl (meth)acrylate. Nanocomposites are also provided that include a plurality of these polymer functionalized nanoparticles dispersed within a polymeric matrix (e.g., a polyolefin matrix).