Abstract: The invention relates to a composition containing at least one plasticizer and silicon dioxide particles having an average particle size of 150 nm or less. According to the invention, the proportion of silicon dioxide particles is from 10 to 80% by weight and the proportion of plasticizer is from 90 to 20% by weight, where the sum of the proportions of silicon dioxide particles and of the plasticizer is at least 80% by weight. The invention makes it possible to mix nanoparticles into any polymeric materials in a simple way.
Abstract: The invention provides a polymerizable composition which comprises: a) acrylates and/or methacrylates, b) 0.05% to 70% by weight of SiO2 particles having an average particle size of 1 to 30 nm which have polymerizable groups of the methacryloyl, acryloyl, styryl, itaconyl, crotonyl, vinyl, allyl and/or alkenyl type on the surface and are present in dispersion in the acrylates and/or methacrylates, at least 50% of the SiO2 particles consisting of individual, unaggregated or unagglomerated primary particles, c) not more than 2% by weight of crosslinker molecules.
Type:
Grant
Filed:
April 20, 2009
Date of Patent:
June 25, 2013
Assignee:
Nanoresins AG
Inventors:
Klaus Langerbeins, Uwe Dietrich Kühner, Werner Siol
Abstract: The invention relates to a polymerizable composition containing: a) acrylates and/or methacrylates which have a glass transition temperature Tg of 0° C. or less, b) from 0.5 to 70% by weight of SiO2 particles which have an average particle size of from 1 to 150 nm and have polymerizable groups on the surface and are present in dispersed form in the acrylates and/or methacrylates, with at least 50% of the SiO2 particles being individual unaggregated or unagglomerated primary particles, where the composition contains not more than 2% by weight of crosslinker molecules.
Type:
Grant
Filed:
April 20, 2009
Date of Patent:
June 18, 2013
Assignee:
Nanoresins AG
Inventors:
Klaus Langerbeins, Uwe Dietrich Kühner, Werner Siol
Abstract: The subject matter of the invention is a method for the removal of alkaline or acidic compounds from a solvent-containing metal oxide dispersion, having the following steps: a. conversion of the solvent into gas phase; b. condensation of the solvent; c. bringing the condensed solvent into contact with a neutralizing agent; d. Return of the condensed solvent into the metal oxide dispersion.
Abstract: Surface-modified silicon dioxide particles or silica sol preparable by reacting aqueous silica sol with at least one first modifier comprising at least one alkoxysilane and with at least one second modifier selected from the group consisting of halosilane, siloxane, and mixtures thereof, with water being removed before the reaction with the first or second modifier.