Processing

Please wait...

Settings

Settings

Goto Application

1. CN109761903 - Preparation method of polyisocyanate containing uretdione groups

Office
China
Application Number 201811597900.3
Application Date 26.12.2018
Publication Number 109761903
Publication Date 17.05.2019
Grant Number 109761903
Grant Date 28.07.2020
Publication Kind B
IPC
C07D 229/00
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
229Heterocyclic compounds containing rings of less than five members having two nitrogen atoms as the only ring hetero atoms
CPC
C07D 229/00
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
229Heterocyclic compounds containing rings of less than five members having two nitrogen atoms as the only ring hetero atoms
C08G 18/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
18Polymeric products of isocyanates or isothiocyanates
Applicants WANHUA CHEMICAL GROUP CO., LTD.
万华化学集团股份有限公司
Inventors ZHU ZHICHENG
朱智诚
SHI BIN
石滨
SHANG YONGHUA
尚永华
YAN CHENGYUE
严成岳
LI JING
李晶
LIU ZHAO
刘照
LIU WEI
刘伟
LI HAIJUN
李海军
WANG NUANCHENG
王暖程
LI YUAN
黎源
Title
(EN) Preparation method of polyisocyanate containing uretdione groups
(ZH) 一种含有脲二酮基团的多异氰酸酯的制备方法
Abstract
(EN)
The invention discloses a preparation method of polyisocyanate containing uretdione groups. Polyisocyanate containing the uretdione groups is prepared from a diisocyanate monomer with the total mass of M in a reaction system through a polymerization reaction under catalysis of tert-phosphine, the reaction is terminated when the ratio of the consumption mass M1 of the diisocyanate monomer in the system to the total mass M of the diisocyanate monomer reaches certain value, the unreacted diisocyanate monomer in the system is removed and recycled to the system, and content of phosphine oxide in the unreacted diisocyanate monomer is controlled to not exceed 1wt%, preferably, not exceed 0.5wt% before the unreacted diisocyanate monomer removed from the system is recycled to the system. An uretdione isocyanate homopolymer obtained with the method has low color scale and good product storage stability.

(ZH)
本发明公开了一种有脲二酮基团的多异氰酸酯的制备方法,反应体系中总质量为M的二异氰酸酯单体在叔膦催化下进行聚合反应制备含有脲二酮基团的多异氰酸酯,当体系中所述二异氰酸酯单体的消耗质量M1占所述二异氰酸酯单体的总质量M的比值达到所需比例后终止反应,脱除体系中未反应的二异氰酸酯单体并将其回用到所述体系,从所述体系中脱除的所述未反应的二异氰酸酯单体在回用到所述体系之前,控制所述未反应的二异氰酸酯单体中氧化膦的含量不超过1wt%,优选不超过0.5wt%。本发明的方法制备得到的脲二酮异氰酸酯均聚物色号低,产品存储稳定性好。

Related patent documents