115 results about "Sol" patented technology

A CMP slurry is provided comprising polishing particles, the polishing particle comprising organically modified colloidal silica. Also, a method of preparing a CMP slurry is provided, comprising the steps of: preparing polishing particles comprising organically modified silica; converting the polishing particles into an aqueous state; and adding pure water, a hydrophilic additive and a dispersing agent to the polishing particles. The polishing particles can be synthesized using a sol-gel process. According to the invention, a slurry having excellent polishing properties can be prepared, in which the surface properties of colloidal silica are changed to control the physical properties of the polishing particles and which can ensure a desired CMP removal rate while minimizing the occurrence of scratches.

An improved, user-friendly silane / silica sol copolymer hardcoating composition for protecting optical plastic and other substrates (including wood, metals, glass, plastics and most coated articles) from scratching is able to be manufactured at lower costs and to provide much-improved ease of use in transportation, storage, dipbath (or other coating tank) stability, and blush resistance in ordinary cleanroom atmospheres. The silane / silica sol copolymer is formed as a direct reaction product of an acidic silica sol and monomethyltrialkoxysilane, preferably substantially monomethyltriethoxysilane, in ratios of 30:70 to 70:30, most preferably about 40:60. A tail solvent aids blush resistance, reduces internal stress and permits adhesion to unprimed polycarbonate. Optionally, colloidal silica sol dissolved in water-miscible solvent may be reacted in a second stage with acidic aqueous colloidal silica sol earlier silanized with monomethyltrialkoxysilane.

It is an object of the present invention to provide a material which is applied to substrates by an easy and simple process, is applicable to substrates of a wide range and is capable of forming an antifouling film exhibiting excellent antifouling performance, and a substrate with an ink-receiving layer having excellent decoloring property. The titanium-containing silica sol of the invention includes (a) the following fine particles (a1) or the following fine particles (a2) and (b) a dispersion medium: (a1) titania fine particles having a mean particle diameter of 2 to 50 nm and porous silica fine particles having a mean particle diameter of 5 to 100 nm and a specific surface area, as determined by BET method, of not less than 300 m2 / g, or (a2) porous silica fine particles obtained by surface-modifying surfaces of porous silica fine particles having a mean particle diameter of 5 to 100 nm and a specific surface area, as determined by BET method, of not less than 300 m2 / g with a titanate compound.

A gel composition for use in etching the surfaces of teeth in preparation for prophylaxis, repair, or restoration, comprising an aqueous solution of an effective quantity of an acid; and a colloidal silica sol, wherein the silica portion of the sol comprises from about 3 to about 20 weight percent of the total etchant composition.

The present invention discloses a light-enforcing agricultural greenhouse membrane and the production process, belonging to the chemical industry. The light-enforcing agricultural greenhouse membrane comprises polyolefin membrane and optical-efficiency self-assembling hybrid membrane. The greenhouse membrane is characterized in that the formula of the optical-efficiency self-assembling hybrid membrane comprises one of or a plurality of dioxide titanium sol with a particle size less than or equal to 20nm and colloidal solid content less than or equal to 30 percent, silica dioxide sol with a particle size less than or equal to 10nm and colloidal solid content less than or equal to 30 percent, distilled water, acrylate micro-emulsion with particle size less than or equal to 100nm, photosensitizer, coupling agent, cationic surfactant, antistatic agent. The 2 polyolefin membrane material of each 10,000m needs 20kg to 160kg of optical-efficiency self-assembling hybrid membrane. With the formula of the optical-efficiency self-assembling hybrid membrane, an optical-efficiency self-assembling hybrid membrane can be prepared on the surface in the molding process of polyolefin membrane. The light-enforcing agricultural greenhouse membrane of a plurality of effects can be prepared.

There is provided a stable sol of zirconium oxide-tin oxide composite colloidal particles and a method of producing the same, a hard coat material applied for a surface of a plastic lens, and an optical member.The present invention relates to a sol comprising zirconium oxide-tin oxide composite colloidal particles (A), wherein a molar ratio of oxide in the zirconium oxide-tin oxide composite colloidal particles (A) is 0.02-0.4 as SnO2 / ZrO2, and the zirconium oxide-tin oxide composite colloidal particles (A) have a structure in which zirconium oxide colloidal particles and tin oxide colloidal particles are bonded together, and a primary particle diameter of 2-100 nm; and also relays to a coating composition comprising a silicon-containing substance (S) of an organic silicon compound or a hydrolysate thereof, and a sol comprising zirconium oxide-tin oxide composite colloidal particles (A), and an optical member having a cured coating formed from the coating composition.

The present invention relates to colloidal silicas having a low S-value and a high solids content, the preparation thereof, and the use thereof in the production of paper. When used in the production of paper, the colloidal silicas of the invention exhibit good retention and drainage performance so that they can be used in lower amounts compared to conventional colloidal silicas. The present invention also relates to an apparatus and a method for producing such activated colloidal silicas.

The invention discloses a preparation method for Er<3+>-Yb<3+>-co-doped NaYF4 fluorescent powder of which the crystalline phase can be controllably synthesized. The method comprises the following steps that yttrium acetate, ytterbium acetate, erbium acetate and sodium hydroxide are batched and mixed, isopropanol, ethyl alcohol and water serve as solvent, trifluoroacetic acid is added, and transparent sol A is obtained after the mixture is stirred evenly; heat treatment is performed on colloidal matter obtained by drying the transparent sol A, the temperature is increased to 300-800 DEG C from the room temperature, heat preservation is performed for a certain time, and the colloidal matter is cooled to the room temperature along with a furnace and then ground to obtain the Er<3+>-Yb<3+>-co-doped up-conversion fluorescent powder with different crystalline phase compositions and multiple light emitting colors. The preparation method is simple in synthesis technology, short in production cycle and capable of easily achieving scale production; the synthesized Er<3+>-Yb<3+>-co-doped up-conversion fluorescent powder is controllable in crystalline phase, diverse in light emitting colors and wide in application.

The present invention relates to a non-adhesive coating composition, including: 100 parts by weight of colloidal silica sol; 5˜60 parts by weight of hexagonal boron nitride (hBN) serving as a filler; 60˜120 parts by weight of alkoxysilane; 40˜130 parts by weight of alcohol; and 0.5˜3.0 parts by weight of a catalyst.

There is provided a stable sol of zirconium oxide-tin oxide composite colloidal particles and a method of producing the same, a hard coat material applied for a surface of a plastic lens, and an optical member.The present invention relates to a sol comprising zirconium oxide-tin oxide composite colloidal particles (A), wherein a molar ratio of oxide in the zirconium oxide-tin oxide composite colloidal particles (A) is 0.02-0.4 as SnO2 / ZrO2, and the zirconium oxide-tin oxide composite colloidal particles (A) have a structure in which zirconium oxide colloidal particles and tin oxide colloidal particles are bonded together, and a primary particle diameter of 2-100 nm; and also relays to a coating composition comprising a silicon-containing substance (S) of an organic silicon compound or a hydrolysate thereof, and a sol comprising zirconium oxide-tin oxide composite colloidal particles (A), and an optical member having a cured coating formed from the coating composition.

The invention relates to a process for producing a charge-reversed aqueous silica sol comprising the steps of:(a) providing a slurry of an acidic cation- exchange solid in an aqueous liquid;(b) providing a starting aqueous silica sol with an alkaline pH, and comprising one or more monovalent cations;(c) contacting the slurry of (a) with the aqueous silica sol of (b);(d) separating the acidic cation-exchange solid from the mixture of (c) to leave a decationised aqueous silica sol with an acidic pH, and with a reduced content of monovalent cations compared to the starting aqueous silica sol; and(e) contacting the decationised aqueous silica sol with one or more compounds comprising one or more modifying elements that can formally adopt a +3 or +4 oxidation state, to produce a charge-reversed aqueous silica sol whose silica particles comprise the one or more modifying elements on their surface; wherein the starting aqueous silica sol has an S-value in the range of from 10 to 50%, and thesurface area of the colloidal silica particles in the starting aqueous silica sol is at least 500 m2 g-1 The invention also relates to a charge-reversed aqueous silica sol that can result from such aprocess, in particular wherein the amount of the one or more modifying elements on the surface of the colloidal silica particles is in the range of from 18.4 to 33 [mu]mol per m-2 of the colloidal silica particles of the starting aqueous silica sol. The charge-reversed aqueous silica sols can be used as a drainage and / or retention aid in paper, board and paperboard making, and also as a flocculant, for example in water treatment or beverage clarification.