Precipitated silica

About: Precipitated silica is a research topic. Over the lifetime, 1401 publications have been published within this topic receiving 20992 citations.

Release controlled particle comprising a biologically active substance, and preparing method thereof

Abstract: A release controlled particle for oral administration is provided to control the release of various active ingredients using biologically active ingredient-silica particles obtained by impregnating the active ingredient or the active ingredient together with a release delaying agent with a porous precipitated silica, thereby being applied to an orally administered formulation such as a fast disintegrating tablet, chewing tablet, capsule, general tablet and syrup. A release controlled particle for oral administration comprises: a core where a biologically active ingredient is impregnated with porous silica having an average particle diameter of 50-1,000 micrometers; and a polymer coating layer formed outside of the core, wherein the core further comprises a release delaying agent of the active ingredient. A method for preparing the release controlled particle comprises the steps of: (a) impregnating a solution prepared by dissolving the biologically active material in a solvent with the porous silica to prepare the core by mixing or kneading the solution of the biologically active material and the porous silica; and (b) coating the core with a coating solution including a solvent and the polymer material. Further, the polymer coating layer is single or multi coating layer.

Aqueous suspensions of precipitated silica with anionic dispersant and aluminum compound

Abstract: Stable aqueous suspensions of precipitated silica, well adopted as coatings for the papermaking industry, include an aqueous suspension of a slaked precipitated silica filter cake and an effective amount of a stabilizer therefor, which stabilizer contains (a) aluminum or an aluminum compound, and (b) an anionic dispersing agent.

Microcapsules and methods for their preparation

Abstract: Dump release microcapsules are formed of a water-reswellable gel having dispersed therein a sorbtive filler material having a median particle size of not more than 1 micron, such as fumed or precipitated silica. The filler material has an active substance absorbed therein and/or adsorbed thereon. The active material can be 2-chloro-6-(trichloromethyl) pyridine and the gel formed from crosslinked lignin or a lignosulphonate.

Non-black fillers for elastomers

Abstract: Almost all rubber products utilize fillers as reinforcing agents. Functional fillers transfer applied stress from the elastomer matrix to the strong and stiff mineral. Of the ingredients used to modify the properties of rubber products, the filler often plays a significant role. Most of the rubber fillers used today offer some functional benefit that contributes to the processability or utility of the rubber product. The non-black fillers for elastomers are calcium carbonate, kaolin clay, precipitated silica, talc, barite, amorphous silica, diatomite, etc.. This papers deals with three most widely used types of

Solid particulate compositions comprising water-soluble carrier polymer and perfume

Abstract: The present invention relates to a solid particulate composition comprising at least one water-soluble carrier polymer, at least one fragrance and at least one polysaccharide, at least one fumed silica and/or at least one precipitated silica. The invention further relates to processes for producing the solid composition, and to a washing or cleaning product comprising the solid composition. In addition, the present invention also relates to the use of a washing or cleaning product of this kind for cleaning of textiles or hard surfaces, and corresponding methods of cleaning textiles or hard surfaces using a washing or cleaning product of this kind.