Title:
METHOD FOR COMPLETELY CONTINUOUSLY PREPARING WATERBORNE POLYURETHANE BY MEANS OF PREPOLYMERIZATION-EMULSIFICATION
Document Type and Number:
WIPO Patent Application WO/2022/183604
Kind Code:
A1
Abstract:
Disclosed is a process method for completely continuously preparing a waterborne polyurethane by means of prepolymerization-emulsification. In the method, a sonochemically enhanced double-screw extruder is used as a waterborne polyurethane prepolymerization and neutralization reactor, and a static mixer and a tubular emulgator are used as a prepolymer emulsification device for prepolymerization and emulsification in a completely continuous manner. The production efficiency is high, the cost is low, and the product quality is stable. The method is particularly suitable for producing a high-solid-content waterborne polyurethane. More importantly, additionally installing a specialized ultrasonic generator in a specific area of the double-screw extruder for a sonochemical treatment on a prepolymerization intermediate can significantly improve the reactivity of materials, such that a prepolymerization reaction can be rapidly completed at a low temperature of 70-80°C in a later stage. The production process is energy-saving and environmentally friendly, side reactions such as branching, crosslinking and degradation caused by high temperatures in the later stage are also avoided, and the obtained waterborne polyurethane is controllable in structure and stable in quality. The process method does not involve the use of any organic solvents, has no selectivity for raw materials, and is suitable for the synthesis of any type of waterborne polyurethane.
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Inventors:
CHEN YI (CN)
ZHOU SHUAI (CN)
FAN HAOJUN (CN)
YAN JUN (CN)
LI CHENGXIANG (CN)
ZHOU SHUAI (CN)
FAN HAOJUN (CN)
YAN JUN (CN)
LI CHENGXIANG (CN)
Application Number:
PCT/CN2021/095919
Publication Date:
September 09, 2022
Filing Date:
May 26, 2021
Export Citation:
Assignee:
UNIV SICHUAN (CN)
International Classes:
C08G18/32; C08G18/12; C08G18/34; C08G18/44; C08G18/48; C08G18/66; C08G18/73; C08G18/75; C08G18/76
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| CN108097194A | 2018-06-01 | |||
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| CN109734866A | 2019-05-10 | |||
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| CN102633971A | 2012-08-15 |
Other References:
KEYVANI M: "IMPROVED POLYURETHANE DISPERSION STABILITY VIA CONTINUOUS PROCESS", ADVANCES IN POLYMER TECHNOLOGY., WILEY AND SONS, HOBOKEN, NJ., US, vol. 22, no. 03, 21 September 2003 (2003-09-21), US , pages 218 - 224, XP001238806, ISSN: 0730-6679, DOI: 10.1002/adv.10050
LU YING, CUI YANJUN;TANG JINSONG: " A Brief Introduction to Hot Issues of Waterborne Polyurethane Patent Technology", POLYURETHANE INDUSTRY, vol. 34, no. 1, 28 February 2019 (2019-02-28), pages 1 - 4, XP055963946, ISSN: 1005-1902
LU YING, CUI YANJUN;TANG JINSONG: " A Brief Introduction to Hot Issues of Waterborne Polyurethane Patent Technology", POLYURETHANE INDUSTRY, vol. 34, no. 1, 28 February 2019 (2019-02-28), pages 1 - 4, XP055963946, ISSN: 1005-1902
Attorney, Agent or Firm:
BEIJING ZHCC INTELLECTUAL PROPERTY CO., LTD (CN)
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