Precipitated silica

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

Reinforced battery separator and methods of use therefor

Abstract: According to one embodiment, a separator for a lead-acid battery includes a membrane film of an ultra-high molecular weight polymer material (UHMWPE). Precipitated silica and glass fibers are disposed throughout the membrane film and held or maintained in position by the UHMWPE. The separator may have a thickness of between 1 and 50 mils and include between 10% and 30% by weight of the UHMWPE, between 40% and 80% by weight of the precipitated silica, between 5% and 25% by weight of processing oils, and between 1% and 30% by weight of the glass fibers.

Polyolefin resin composition

Abstract: PURPOSE: To obtain a resin composition which can give a molding improved in mechanical strengths, impact resistance and tensile strength without causing hazing by adding a silicic filler surface-treated with a specified alkyltrialkoxysilane to a polyolefin resin. CONSTITUTION: The title resin composition contains a silicic filler surface-treated with an alkyltrialkoxysilane of the formula (wherein R is a 4-18C alkyl, and X is a 1-4C alkoxy). The silicic filler has an action of improving the rigidity and heat resistance of a polyolefin. Examples of the silicic fillers include talc, clay, mica, feldspar powder, fumed silica, precipitated silica, burned precipitated silica, burned diatomaceous earth and fine quartz powder. To surface-treat the silicic filler with the alkyltrialkoxysilane, the silane is uniformly attached to the silicic filler by adhesion or adsorption at 0-200°C and heat-treated at 40-300°C. COPYRIGHT: (C)1989,JPO&Japio

Silica reinforced rubber composition which contains oleylammonium bromide and/or mercaptoimidazolium bromide coupling agents to enhance electrical conductivity and article of manufacture, including a tire, having at least one component comprised of such rubber composition

Abstract: This invention relates to a conjugated diene-based rubber composition reinforced with silica-based reinforcement together with a non-silane coupling agent as N-3-(1,2-dihydroxypropyl)-N-oleylammonium bromide and/or N-3-(1,2-dihydroxypropyl)-N-methyl-2-mercaptoimidazolium bromide for endeavoring to both couple synthetic aggregates of precipitated silica to elastomers and enhancing electrical conductivity of such rubber compositions which contain less than 25 parts by weight carbon black per 100 parts by weight elastomer. Said coupling agent materials may be provided for mixing with said diene-based rubber(s), for example, as individual materials, as at least one of said materials being supported on a carbon black carrier or as being pre-reacted, or otherwise pre-treated, with synthetic silica aggregates. The invention includes an article of manufacture, including a tire, having at least one component comprised of such rubber composition.

Stable aqueous dispersions of precipitated silica

Abstract: The invention relates to stabilized dispersions of precipitated silicon dioxide, to a process for production thereof and to the use thereof, especially for production of paper coatings for glossy photo paper for inkjet printing

The Effect of Characteristics of a Seed on Silica Removal from a Model Geothermal Brine by a Seeding Method Using Silica Gel

Abstract: In order to apply a seeding method using silica gel to silica removal from geothermal brines, the effects of the seed particle diameter, initial specific surface area and initial pore diameter on silica removal are experimentally examined using a model geothermal brine. The silica in the brine is precipitated on the internal surface area of pore in the silica gel seeds. The specific surface area of the seed decreases with increasing quantity of precipitated silica. The effects of the particle diameter on the quantity of the final precipitated silica and on the final specific surface area are hardly seen. The quantity of precipitated silica per unit surface area increases with increasing initial pore diameter, and the silica precipitation rate coefficient increases with decreasing particle diameter and with increasing initial pore diameter. When the quanttty of precipitated silica is small, the silica precipitation rate coefficient is proportional to the -0.72 power of the particle diameter.