METHOD FOR PREPARING POLYURETHANE FOAMS

The invention relates to a method for preparing polyurethane foams, comprising (1) placing a reaction mixture into a pressurizable chamber, and (2) polymerizing the reaction mixture at an additional pressure, wherein the reaction mixture comprises an isocyanate, an isocyanate-reactive compound and a...

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Bibliographic Details
Main Authors LIU, Jin Lin, XI, Bang Wei, LIU, YingHao, CHIEN, Wei Liang, CHEN, Bo
Format Patent
LanguageEnglish
French
Published 06.08.2020
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:The invention relates to a method for preparing polyurethane foams, comprising (1) placing a reaction mixture into a pressurizable chamber, and (2) polymerizing the reaction mixture at an additional pressure, wherein the reaction mixture comprises an isocyanate, an isocyanate-reactive compound and a blowing agent, and the reaction mixture is placed into the pressurizable chamber at a packing factor of 2.0-4.0. The invention also relates to a polyurethane foam prepared by said method. L'invention concerne un procédé de préparation de mousses de polyuréthane, consistant à (1) placer un mélange réactionnel dans une chambre pressurisable, et (2) polymériser le mélange réactionnel à une pression supplémentaire, le mélange réactionnel comprenant un isocyanate, un composé réagissant avec l'isocyanate et un agent d'expansion, et le mélange réactionnel étant placé dans la chambre pressurisable à un facteur de remplissage de 2,0 à 4,0. L'invention concerne également une mousse de polyuréthane obtenue par ledit procédé.
Bibliography:Application Number: WO2020EP52042