Abstract:
PROBLEM TO BE SOLVED: To produce a foamed plastic material based on a polyisocyanate polyaddition product by reacting an isocyanate compound with an isocyanate- reacting compound in the presence of a catalyst and optionally an auxiliary and/or an additive. SOLUTION: This method for producing a polyurethane foam comprises reacting an isocyanate compound with an isocyanate-reacting compound in the presence of a catalyst, etc. Therein, (i) an isocyanate having an isocyanurate structure and/or a biuret structure is used as the isocyanate compound. (ii) The isocyanate-reacting compound herein used is at least one kind of diol and/or polyol, having a mol.wt. of 400-8,000 and containing primary hydroxyl groups in an amount of at least 50% based on all hydroxyl groups contained in the compound. (iii) At least one kind of compound having at least one primary amino group, and a diol and/or a triol having a mol.wt. of
Abstract:
The invention relates to graft polyols with a bimodal particle size distribution and a total solid content of between 5 and 65 wt. %. Said polyols contain small particles with a particle diameter of between 0.05 and 0.7 mu m and large particles with a particle diameter of between 0.4 and 5.0 mu m, whereby the peaks of the large and small particles measured during a representation according to the light-scattering analysis method do not overlap. The total solid content with the defined particle sizes consists of a volumetric fraction of between 5 and 45 % small particles and a volumetric fraction of between 95 and 55 % large particles, said volumetric fractions totalling 100 %. The invention also relates to a method for producing graft polyols of this type and to the use thereof for producing polyurethanes.
Abstract:
Verfahren zur Herstellung eines elastischen, flammkaschierbaren Polyurethan-Polyetherblockschaumstoffs, wobei dem Blockschaumstoff mindestens ein Diol zugesetzt wird.
Abstract:
Preparation of polyurethane-foaming substance (A) with reduced emission comprises: reacting polyisocyante with a compound (B) containing at least two reactive hydrogen atoms of isocyanates in the presence of a catalysts, where the catalyst is at least an alcohol compound (I). Preparation of polyurethane-foaming substance (A) with reduced emission comprises: reacting polyisocyanate with a compound containing at least two reactive hydrogen atoms of isocyanates in the presence of a catalyst, where the catalyst is an alcohol compound of formula (I). R1, R2 : -C aH 2a+1 or -C bH cN d; a : 1-4; b : 3-7; c : 6-14; d : 0-2; R3 : C eH fO g; e : 0-4; f : 0-8; g : 0-2; R4 : H, CH 3 or C 2H 5; and n, m : 1-5. An independent claim is also included for the polyurethane-foaming substance obtained by the method with a content of volatile organic compounds (less than 100 ppm) and condensable compounds (less than 250 ppm). [Image].
Abstract:
Un poliol de injerto que tiene una distribución de tamaño de partícula bimodal y un contenido total de sólidos desde 5 hasta 63% en peso, que contiene partículas pequeñas que tienen un diámetro de partícula desde 0.05 hasta 0.7 µm y partículas grandes que tienen un diámetro de partícula de 0.4 hasta 5.0 µm, los picos de las partículas grandes y pequeñas medidos por el método de difracción de Fraunhofer en combinación con la dispersión diferencial de intensidad de polarización no se traslapan, y un contenido total de sólidos que tiene los tamaños de partícula definidos que constan de una fracción de volumen desde 5 hasta 45% de partículas pequeñas y un volumen de fracción desde 95 hasta 55% de partículas grandes, esas fracciones de volumen que suman hasta 100%.
Abstract:
The invention relates to graft polyols with a bimodal particle size distribution and a total solid content of between 5 and 65 wt. %. Said polyols contain small particles with a particle diameter of between 0.05 and 0.7 μm and large particles with a particle diameter of between 0.4 and 5.0 μm, whereby the peaks of the large and small particles measured during a representation according to the light-scattering analysis method do not overlap. The total solid content with the defined particle sizes consists of a volumetric fraction of between 5 and 45% small particles and a volumetric fraction of between 95 and 55% large particles, said volumetric fractions totalling 100%. The invention also relates to a method for producing graft polyols of this type and to the use thereof for producing polyurethanes.
Abstract:
The invention relates to graft polyols with a bimodal particle size distribution and a total solid content of between 5 and 65 wt. %. Said polyols contain small particles with a particle diameter of between 0.05 and 0.7 μm and large particles with a particle diameter of between 0.4 and 5.0 μm, whereby the peaks of the large and small particles measured during a representation according to the light-scattering analysis method do not overlap. The total solid content with the defined particle sizes consists of a volumetric fraction of between 5 and 45% small particles and a volumetric fraction of between 95 and 55% large particles, said volumetric fractions totalling 100%. The invention also relates to a method for producing graft polyols of this type and to the use thereof for producing polyurethanes.
Abstract:
Preparation of soft polyurethane (PU) foam (A) by reacting a polyisocyanate (I) with a block polyoxypropylene-polyoxyethylene polyol (II), having at least two isocyanate-reactive hydrogen atoms; hydroxy number 25-45 mg potassium hydroxide/g and content of terminally bound ethylene oxide units 15-17wt.% on total amount of alkylene oxide. Preparation of soft polyurethane (PU) foam (A) by reacting a polyisocyanate (I) with a block polyoxypropylene-polyoxyethylene polyol (II), having at least two isocyanate-reactive hydrogen atoms; hydroxy number 25-45 mg potassium hydroxide/g and content of terminally bound ethylene oxide units 15-17wt.% on total amount of alkylene oxide. (II) is prepared by addition of ethylene and propylene oxides to a starter molecule (III) of mean functionality 3. Independent claims are also included for: (a) (A) produced by the new method; (b) (II); and (c) polyol mixture, for preparing soft PU, that contains at least one (II).
Abstract:
The present invention relates to a process for the production of flexible polyurethane foams by reaction of a) at least one compound having at least two isocyanate-reactive hydrogen atoms, with b) polyisocyanates, wherein the compund used as said compound having at least two isocyanate-reactive hydrogen atoms a) comprises at least one block polyoxypropylene/polyoxyethylene/polyol having a hydroxyl value of from 25 to 45 mg KOH/g and a content of terminally bound ethylene oxide units of from 15 to 17 wt%, based on the total amount of the alkylene oxide, obtained by attachment of ethylene oxide and propylene oxide to an initiator having an average func- tionality of 3.