US 11,987,662 B2
Environmentally-friendly flexible conductive polyurethane (PU) and preparation method thereof
Dongming Qi, Hangzhou (CN); Zhichao Huang, Hangzhou (CN); Qianjun Tian, Hangzhou (CN); Lin Wang, Hangzhou (CN); and Chenghai Liu, Shaoxing (CN)
Assigned to SHAOXING-KEQIAO INSTISUTE OF ZHEJIANG SCI-TECH UNIVERSITY CO., LTD., Shaoxing (CN); and ZHEJIANG SCI-TECH UNIVERSITY, Hangzhou (CN)
Filed by SHAOXING-KEQIAO INSTISUTE OF ZHEJIANG SCI-TECH UNIVERSITY CO., LTD., Shaoxing (CN); and ZHEJIANG SCI-TECH UNIVERSITY, Hangzhou (CN)
Filed on May 9, 2022, as Appl. No. 17/739,176.
Application 17/739,176 is a continuation of application No. PCT/CN2022/086127, filed on Apr. 11, 2022.
Claims priority of application No. 202210134031.0 (CN), filed on Feb. 14, 2022.
Prior Publication US 2023/0257508 A1, Aug. 17, 2023
Int. Cl. C08G 18/75 (2006.01); C08G 18/24 (2006.01); C08G 18/38 (2006.01); C08G 18/40 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 18/66 (2006.01); C08K 3/04 (2006.01); C08K 7/18 (2006.01); H01B 1/24 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)
CPC C08G 18/755 (2013.01) [C08G 18/246 (2013.01); C08G 18/3897 (2013.01); C08G 18/4018 (2013.01); C08G 18/4277 (2013.01); C08G 18/4854 (2013.01); C08G 18/6666 (2013.01); C08K 3/041 (2017.05); C08K 7/18 (2013.01); H01B 1/24 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C08K 2201/001 (2013.01); C08K 2201/003 (2013.01); C08K 2201/004 (2013.01); C08K 2201/005 (2013.01); C08K 2201/006 (2013.01); C08K 2201/011 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A preparation method of an environmentally-friendly flexible conductive polyurethane (PU), comprising the following steps:
1) Preparation of a first component, comprising: heating at least one reagent selected from the group consisting of a polyol, a diselenide diol, and a T-type chain extender to 50° C. to 130° C., adding high-conductivity carbon black and a dispersing agent, ultrasonically stirring, and adding a catalyst and a leveling agent to obtain a hydroxyl-terminated polymer as the first component;
2) Preparation of a second component, comprising: heating a polyisocyanate or the polyol to 50° C. to 130° C., adding a multi-walled carbon nanotube (MWCNT) and the dispersing agent, ultrasonically stirring, adding remaining materials, and stirring at a predetermined temperature to obtain an isocyanate-terminated prepolymer as the second component; and
3) Preparation of the environmentally-friendly flexible conductive PU: adding the first component and the second component to a reactor according to a specified weight ratio, stirring at a high speed of 1,500 r/min to 2,000 r/min for 4 min to 10 min, and aging at 100° C. to 120° C. for 1 hour to 2 hours to obtain the environmentally-friendly flexible conductive PU.