Preparation of polyisocyanates containing uretdione groups using phosphine catalysts
申请人:Richter Frank
公开号:US20080262262A1
公开(公告)日:2008-10-23
The invention provides a process for isocyanate dimerization (uretdione formation) and a process for preparing polyisocyanates having a high content of uretdione groups, using specific phosphines as catalysts. The phosphines have one or two tertiary alkyl radicals bound directly to phosphorus.
Die Erfindung betrifft die Verwendung von speziellen Phosphinen als Katalysatoren für die Isocyanatdimerisierung (Uretdionbildung) und ein Verfahren zur Herstellung hoch uretdiongruppenhaltiger Polyisocyanate.
Method for producing a polyisocyanate polymer and a polyisocyanurate plastic
申请人:COVESTRO INTELLECTUAL PROPERTY GMBH & CO. KG
公开号:US11319402B2
公开(公告)日:2022-05-03
The invention relates to a method for producing a polyisocyanate polymer and to the polyisocyanate polymer obtainable from the method and to the use thereof as part of a two-stage method for producing a polyisocyanurate plastic, in particular for producing coatings, films, semi-finished products or molded parts containing such a polyisocyanurate plastic.
[EN] NOVEL INTERMEDIATE, PREPARATION METHOD FOR SAME, AND APPLICATIONS THEREOF<br/>[FR] NOUVEL INTERMÉDIAIRE, SON PROCÉDÉ DE PRÉPARATION ET SES UTILISATIONS<br/>[ZH] 一种新型中间体及其制备方法和应用