Title:
PREPARATION METHOD FOR WATERBORNE POLYURETHANE DISPERSING AGENT AND USE OF WATERBORNE POLYURETHANE DISPERSING AGENT
Document Type and Number:
WIPO Patent Application WO/2023/077679
Kind Code:
A1
Abstract:
A preparation method for a waterborne polyurethane dispersing agent and the use of the waterborne polyurethane dispersing agent. The preparation method belongs to the field of polymeric dispersing agents, and comprises the specific steps of: weighing a compound containing an isocyanate group as an initiator, reacting same with polyethylene glycol in the presence of nitrogen and a catalyst to generate a polyurethane prepolymer, and adding an organic solvent to the reaction system to control the viscosity; adding a chain extender 1 at 75-80ºC, and perform a chain extension reaction for 2-2.5 h; adding a chain extender 2 at 75-80ºC, and continuing the chain extension reaction for 2-2.5 h; cooling same to 50-55ºC, adding an end-capping agent and perform an end-capping reaction for 1-1.5 h; and after the reaction is finished, adding triethylamine, perform a neutralization reaction for 1 h, adding deionized water, performing high-speed emulsification for 20-30 min, and subjecting same to reduced pressure distillation at room temperature to remove the organic solvent, so as to obtain a waterborne polyurethane dispersing agent. A liquid indigo dye prepared from the dispersing agent having the structure has a high grinding efficiency and a good storage stability.
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Inventors:
YIN YUNJIE (CN)
ZHANG SUWEN (CN)
WANG CHAOXIA (CN)
ZHANG SUWEN (CN)
WANG CHAOXIA (CN)
Application Number:
PCT/CN2022/072840
Publication Date:
May 11, 2023
Filing Date:
January 20, 2022
Export Citation:
Assignee:
UNIV JIANGNAN (CN)
International Classes:
C08G18/66; C08G18/10; C08G18/32; C08G18/34; C08G18/48; C09B67/04; C09B67/46
Domestic Patent References:
| WO2009143433A1 | 2009-11-26 |
Foreign References:
| CN101228201A | 2008-07-23 | |||
| CN111574682A | 2020-08-25 | |||
| CN111320738A | 2020-06-23 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
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