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1. (WO2018120055) POLYURETHANE OR POLYURETHANE-UREA AQUEOUS DISPERSION, PREPARATION METHOD THEREFOR, AND USE THEREOF

Pub. No.:    WO/2018/120055    International Application No.:    PCT/CN2016/113585
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Sat Dec 31 00:59:59 CET 2016
IPC: C08G 18/66
C08G 18/44
C08G 18/42
C08G 18/48
C08G 18/32
C08G 18/12
C09D 175/08
C09D 175/06
C09J 175/08
C09J 175/06
C08J 3/03
Applicants: WANHUA CHEMICAL GROUP CO., LTD.
万华化学集团股份有限公司
WANHUA CHEMICAL (GUANGDONG) CO., LTD.
万华化学(广东)有限公司
Inventors: JI, Xueshun
纪学顺
JIN, Yunquan
晋云全
ZHOU, Tianwen
周天文
ZHAO, Weiguo
赵伟国
WANG, Haimei
王海梅
LIU, Yunling
刘云玲
WANG, Zhen
王震
ZHANG, Bin
张斌
CAO, Yuyang
曹玉阳
SUN, Jiakuan
孙家宽
Title: POLYURETHANE OR POLYURETHANE-UREA AQUEOUS DISPERSION, PREPARATION METHOD THEREFOR, AND USE THEREOF
Abstract:
A self-crosslinkable polyurethane or polyurethane-urea aqueous dispersion, a preparation method therefor, and a use thereof. Side chains of the polyurethane or polyurethane-urea contain a non-sterically-hindered siloxane group. During the drying and activation of the aqueous dispersion, the siloxanes in the side chains are hydrolyzed and crosslinked with each other to increase a cross-linking density, significantly improving the heat resistance, the humidity resistance, and other properties of an adhesive obtained therefrom. The water dispersion itself has a good stability. In addition, an application system based thereon has an excellent stability and a long storage time. The aqueous dispersion is suitable for the preparation of high quality paints and sealants, especially adhesives.