Abstract

The invention relates to a polymerisable mass, comprising a) acrylates and/or methacrylates, b) 0.05 to 70 wt. % SiO2-particles with a mean particle size of 1 to 30 nm, with polymerisable groups of the methacryloyl, acryloyl, styryl, itaconyl, crotonyl, vinyl, allyl and/or alkenyl type on the surface, dispersed in the acrylates and/or methacrylates, wherein the SiO2- particles consist of at least 50% of individual non-aggregated or agglomerated primary particles and c) a maximum of 2 wt. % cross-linking molecules.

IPC Classes  ?

• C08F 220/14 - Methyl esters
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds

Abstract

The invention relates to surface modified silicon dioxide particles or silica sol, which may be produced in that aqueous silica sol is reacted using at least one first modification agent, comprising at least one alkoxy silane, and at least a second modification agent, selected from the group consisting of halogen silane, siloxane, and mixtures thereof, wherein water is removed before the reaction using the first or the second modification agent.

IPC Classes  ?

• C09C 1/30 - Silicic acid
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds

Abstract

The invention relates to metal or metalloid oxide nanoparticles with a mean particle size of 2 to 250 nm, characterised in that the nanoparticles have at least two different radically polymerisable groups on the surface. The invention further relates to nanocomposites made from said nanoparticles and methods for production thereof.

IPC Classes  ?

• C09C 3/08 - Treatment with low-molecular-weight organic compounds
• C09C 3/12 - Treatment with organosilicon compounds
• C08K 9/04 - Ingredients treated with organic substances
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds

Abstract

The invention relates to a polymerisable mass, comprising a) acrylates and/or methacrylates, with a glass transition temperature Tg of 0 °C or less, b) 0.5 to 70 wt. % SiO2 particles with a mean particle size of 1 to 150 nm, with polymerisable groups on the surface dispersed in the acrylates and/or methacrylates, wherein the SiO2 particles are made up of at least 50% of individual non-aggregated or agglomerated primary particles the mass comprising a maximum of 2 wt. % of cross-linker molecules.

IPC Classes  ?

• C08F 220/14 - Methyl esters
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds

Abstract

The object of the patent is to provide a modified reaction resin, comprising: a) at least one cyanate tester; b) at least one polyorganosiloxane contained in the reaction resin in finely distributed form. The thus modified reaction resin is stable for storage for long periods in non-cured form and can be cured to form duromers with advantageous mechanical characteristics.

IPC Classes  ?

• C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
• C08G 59/42 - Polycarboxylic acids; Anhydrides, halides, or low-molecular-weight esters thereof
• C08G 73/06 - Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule; Polyhydrazides; Polyamide acids or similar polyimide precursors
• C08K 3/00 - Use of inorganic substances as compounding ingredients
• C08L 79/04 - Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
• H01L 23/29 - Encapsulation, e.g. encapsulating layers, coatings characterised by the material
• B32B 15/14 - Layered products essentially comprising metal next to a fibrous or filamentary layer
• C08K 5/13 - Phenols; Phenolates
• C08K 5/315 - Compounds containing carbon-to-nitrogen triple bonds
• C08K 5/5419 - Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond

Abstract

The invention relates to modified phenol resins, to a method for the production thereof, to phenol resin formulations comprising the modified phenol resins, and to a method for the production thereof. The invention further describes specific uses of corresponding phenol resins or phenol resin formulations and to the use of block copolymers for the production of phenol resins.

IPC Classes  ?

• C08G 8/38 - Block or graft polymers prepared by polycondensation of aldehydes or ketones on to macromolecular compounds
• C08G 8/28 - Chemically modified polycondensates
• C08C 19/30 - Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule
• C08C 19/36 - Addition of a reagent which reacts with a hetero atom or a group containing hetero atoms of the macromolecule reacting with oxygen or oxygen-containing groups with carboxy radicals
• C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs

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.

IPC Classes  ?

• B01D 5/00 - Condensation of vapours; Recovering volatile solvents by condensation
• C08K 3/22 - Oxides; Hydroxides of metals

Abstract

The invention relates to a composition, containing at least one plasticizer and silicon dioxide particles with an average particle size of 150 nm or smaller. According to the invention, the proportion of silicon dioxide particles is 10 to 80% by weight, and the proportion of plasticizer is 90 to 20% by weight. The sum of the silicon dioxide particle and plasticizer fractions is at least 80% by weight. The invention enables nanoparticles to be mixed easily into any polymer materials.

IPC Classes  ?

• C08K 3/36 - Silica
• C08K 5/00 - Use of organic ingredients
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08K 5/092 - Polycarboxylic acids
• C08K 5/10 - Esters; Ether-esters
• C08K 5/134 - Phenols containing ester groups
• C08K 5/42 - Sulfonic acids; Derivatives thereof
• C08K 5/521 - Esters of phosphoric acids, e.g. of H3PO4
• C08K 9/00 - Use of pretreated ingredients

Abstract

The object of the invention is a method for the production of a nano-scale silicon dioxide, said method comprising the following steps: a) provision of an aqueous suspension of a colloidal silicon dioxide with an average particle size of 1 to 500 nm; b) allowing said suspension to react with an organosilane or organosiloxane in an aprotic cyclic ether and silanization of the colloidal silicon dioxide; c) separation of the aqueous phase of the reaction mixture from the organic phase; d) allowing the organic phase to react again with an organosilane or organosiloxane in an aprotic cyclic ether and silanization of the colloidal silicon dioxide; e) separation of the aqueous phase of the reaction mixture from the organic phase.

IPC Classes  ?

• C09C 1/36 - Compounds of titanium
• C09C 1/30 - Silicic acid