申请人:Wanhua Chemical Group Co., Ltd.
公开号:EP3901189A1
公开(公告)日:2021-10-27
Provided by the present invention are a stable dispersant and an application thereof in preparing copolymer polyols, the preparation method for the stable dispersant comprising: 1) contacting a polyol with a dianhydride compound for reaction so as to prepare an adduct; 2) performing a ring-opening addition reaction on the adduct obtained in step 1) and an epoxy compound to prepare a stable dispersant; the dianhydride compound does not contain a double bond that may copolymerize with an olefinically unsaturated monomer, while the epoxy compound contains a double bond that may copolymerize with an olefinically unsaturated monomer, the polyol is a polyester polyol and/or a polyether polyol, preferably being a polyether polyol. The stable dispersant obtained by means of the described preparation method has a multi-active site anchoring function, and is applied to the synthesis of copolymer polyols to obtain copolymer polyols having relatively uniform particle size.
本发明提供了一种稳定分散剂及其在制备共聚多元醇中的应用,该稳定分散剂的制备方法包括:1)将多元醇与二酐化合物接触反应,以制备加合物;2)对步骤 1)中获得的加合物和环氧化合物进行开环加成反应,以制备稳定的分散剂;二酐化合物不含有可与烯烃不饱和单体共聚的双键,而环氧化合物含有可与烯烃不饱和单体共聚的双键,多元醇是聚酯多元醇和/或聚醚多元醇,最好是聚醚多元醇。通过所述制备方法获得的稳定分散剂具有多活性位点锚定功能,应用于共聚多元醇的合成,可获得粒径相对均匀的共聚多元醇。