Abstract:
The invention relates to a method for producing nanoscale metal oxide-filled polymers. Said method is characterized by the following steps: a) producing a nanosuspension of one or more crystalline metal oxides, metal hydroxides or metal oxide hydroxides by heating a suspension of one or more compounds containing the corresponding metals in a first polymerizable compound to a temperature higher than the boiling point of water at process temperature and lower than the boiling temperature of the first polymerizable compound and also lower than the temperature at which polymerization of the first polymerizable compound begins, in the presence of water in an amount corresponding to 1 to 10 oxygen atoms per metal atom of the compound or of the compounds containing the corresponding metals, and b) polymerization of the first polymerizable compound under the conditions of temperature and pressure conventional for the first polymerizable compound.
Abstract:
The present invention relates to a blend containing an epoxy resin, a cyclic carbonate and a hardener containing a polyalkoxypolyamine, an additional amine and a catalyst, a process for producing this blend, the use of the blend according to the invention for producing cured epoxy resin and an epoxy resin which has been cured by means of the blend according to the invention, in particular fibre-reinforced cured epoxy resins for use in rotor blades for wind turbines.
Abstract:
Polyester polyol containing the esterification product of a) 10 to 70 mol-% of a dicarboxylic acid composition containing a1) from 50 to 100 mol-% of a terephthalic acid-based material selected from terephthalic acid, dimethyl terephthalate and polyalkylene terephthalate and mixtures thereof, a2) 0 to 50 mol-% of phthalic acid, phthalic acid anhydride or isophthalic acid, a3) 0 to 50 mol-% of one or more dicarboxylic acids, b) 2 to 30 mol-% of one or more fatty acids and/or fatty acid derivatives and/or benzoic acid, c) 10 to 70 mol-% of one or more aliphatic or cycloaliphatic diols with 2 to 18 C atoms or alkoxylates thereof, d) 2 to 50 mol-% of a highly functional polyol selected from the group consisting of glycerin, alkoxylated glycerin, trimethylol propane, alkoxylated trimethylol propane, pentaerythritol and alkoxylated pentaerythritol, wherein at least 200 mmol, preferably at least 500 mmol and especially preferred at least 800 mmol of polyols d) with an OH functionality of = 2.9 are converted per kg of polyester polyol.
Abstract:
The invention relates to light wood-based materials containing 30 - 92.5 % by wt. of wood particles, in relation to the wood-based material. Said wood particles have an average density of between 0.4 - 0.85 g/cm 3 , 2.5 - 20 % by wt. of polystyrene and/or styrene copolymer as filling material, in relation to the wood-based material. Said filling material has a bulk density of between 10 -100 kg/m 3 , and 5 - 50 % by wt. of binding agents, in relation to wood-based material. The average density of the light wood-based material is less than or equal to 600 kg/m 3 .
Abstract:
processos para preparar um poliéster poliol e para preparar um poliuterano, poliéster poliol, poliuterano termoplástico, usos de um poliéster poliol e de um poliuterano termoplástico, e artigo. a invenção refere-se a uma método para a produção de um poliéster poliol, que comprrende as seguintes etapas do método: (a) produzir uma mistura de reação, que compreende os seguintes componentes: a: pelo menos um ácido carboxílico obtido a partir de matérias primas naturais, tendo pelo menos dois grupos ácidos, b: pelo menos um álcool multivalente, c: pelo menos um composto de fosfita orgânico, d: pelo menos um ácido de lewis; (b) aquecer a mistura da reação a uma temperatura de pelo menos 160ºc e separar a água, que é gerada durante a reação; (c) aquecer a mistura da reação a uma temperatura de pelo menos 210ºc, em uma pressão baixo de 1013 mbar, durante um período de 0,1 25 horas.
Abstract:
The present invention relates to polyester polyols based on aromatic dicarboxylic acids, and to the use thereof for production of rigid polyurethane foams.
Abstract:
La presente invención se refiere a polioles de poliéster basados en ácidos dicarboxílicos aromáticos, y al uso de los mismos para la producción de espumas de poliuretano rígidas.
Abstract:
The invention relates to a process for preparing polyesterols from at least one base polyesterol and at least one further reagent, wherein (a) the at least one base polyesterol and the at least one further reagent are mixed, (b) the mixture produced in (a) flows through a reactor in which at least one packing comprising at least one immobilized enzyme on a support is present, with the at least one base polyesterol and the at least one further reagent being reacted to form the polyesterol.