Title:
POLYISOCYANATE COMPOSITION, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/241616
Kind Code:
A1
Abstract:
Disclosed herein are a polyisocyanate composition, a preparation method therefor and an application thereof. The pH of an aqueous phase extraction liquid obtained after the polyisocyanate composition is subjected to an isocyanate-based endcapping derivation reaction ranges from 6.5 to 7.5. In the present application, by controlling the pH of the aqueous phase extraction liquid, the long-term storage stability of polyisocyanate can be effectively improved, and the viscosity growth rate after storage for 15 months at 30°C is less than 10%. Moreover, the polyisocyanate composition provided by the present application has a simple preparation process, has broad spectrum, and is easy to industrialize.
Inventors:
WANG NUANCHENG (CN)
FAN WEIJING (CN)
YU TAO (CN)
WANG DAN (CN)
LIU WEIJIE (CN)
ZHAO YONGNIAN (CN)
LI HAIJUN (CN)
SHI BIN (CN)
SHANG YONGHUA (CN)
FAN WEIJING (CN)
YU TAO (CN)
WANG DAN (CN)
LIU WEIJIE (CN)
ZHAO YONGNIAN (CN)
LI HAIJUN (CN)
SHI BIN (CN)
SHANG YONGHUA (CN)
Application Number:
PCT/CN2021/094147
Publication Date:
November 24, 2022
Filing Date:
May 17, 2021
Export Citation:
Assignee:
WANHUA CHEMICAL NINGBO CO LTD (CN)
WANHUA CHEMICAL GROUP CO LTD (CN)
WANHUA CHEMICAL GROUP CO LTD (CN)
International Classes:
C08G18/72; C08G18/73; C08G18/79; C09D175/04; C09J175/04
Foreign References:
| CN112225857A | 2021-01-15 | |||
| CN1162609A | 1997-10-22 | |||
| CN109651279A | 2019-04-19 | |||
| CN107021920A | 2017-08-08 | |||
| US20020120089A1 | 2002-08-29 | |||
| US5144031A | 1992-09-01 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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