IMINE-TYPE QUATERNARY AMMONIUM SALT CATALYST, PREPARATION METHOD THEREOF AND USE THEREOF FOR PREPARATION OF POLYISOCYANATE COMPOSITION
申请人:Wanhua Chemical Group Co., Ltd.
公开号:US20200377445A1
公开(公告)日:2020-12-03
Disclosed is an imine-type quaternary ammonium salt catalyst, wherein the catalyst has a general structure formula shown by formula I below; in the formula, R1 and R2, respectively, are independently selected from a C1-C20 linear alkyl or a branched C3-C20 alkyl, and a C1-C20 hydroxylalkyl, a C3-C8 cycloalkyl, and arylated alkyl; R3 is a linear or branched alkyl, cycloalkyl or aryl; and R4 is hydrogen, aryl, a linear C1-C15 alkyl or branched C3-C15 alkyl. Also disclosed are a method for preparing the catalyst and a polyisocyanate composition prepared therefrom. The catalyst, by introducing an imine structure, on the basis of ensuring high catalytic activity thereof, is allowed to have properties of high temperature decomposition and inactivation, and when applied to the synthesis of polyisocyanate, can effectively prevent the risk of explosive polymerization caused by an uncontrolled reaction.
本公开涉及一种亚胺型季铵盐催化剂,其中催化剂具有如下式I所示的一般结构式;在该式中,R1和R2分别独立地选择自C1-C20直链烷基或分支的C3-C20烷基,以及C1-C20羟基烷基,C3-C8环烷基和芳基化烷基;R3是直链或分支烷基,环烷基或芳基;R4是氢,芳基,直链C1-C15烷基或分支的C3-C15烷基。还公开了一种制备该催化剂的方法以及由此制备的聚异氰酸酯组合物。该催化剂通过引入亚胺结构,在确保其高催化活性的基础上,具有高温分解和失活的特性,当应用于聚异氰酸酯的合成时,可以有效防止由于不受控制的反应引起的爆炸聚合风险。