US 12,421,419 B2
Preparation method for ultraviolet-responsive coumarin controlled-release and self-repairing anti-fouling paint
Qinghua Zhang, Quzhou (CN); Zheming Tong, Quzhou (CN); and Xiaoli Zhan, Quzhou (CN)
Assigned to QUZHOU RESEARCH INSTITUTE OF ZHEJIANG UNIVERSITY, Quzhou (CN)
Appl. No. 17/927,756
Filed by QUZHOU RESEARCH INSTITUTE OF ZHEJIANG UNIVERSITY, Quzhou (CN)
PCT Filed Nov. 9, 2021, PCT No. PCT/CN2021/129498
§ 371(c)(1), (2) Date Nov. 25, 2022,
PCT Pub. No. WO2022/160853, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 202110123001.5 (CN), filed on Jan. 29, 2021.
Prior Publication US 2023/0212419 A1, Jul. 6, 2023
Int. Cl. C09D 175/04 (2006.01); C08G 18/10 (2006.01); C08G 18/24 (2006.01); C08G 18/61 (2006.01); C08G 18/72 (2006.01); C08K 5/1545 (2006.01); C09D 5/16 (2006.01); C09D 7/20 (2018.01); C09D 7/63 (2018.01)
CPC C09D 175/04 (2013.01) [C08G 18/10 (2013.01); C08G 18/242 (2013.01); C08G 18/61 (2013.01); C08G 18/72 (2013.01); C08K 5/1545 (2013.01); C09D 5/1625 (2013.01); C09D 7/20 (2018.01); C09D 7/63 (2018.01)] 10 Claims
OG exemplary drawing
 
1. A preparation method for an ultraviolet-responsive coumarin controlled-release and self-repairing anti-fouling paint, comprising the following steps:
(1) taking 10 parts-50 parts by weight of a double-end-group reactive polydimethylsiloxane, 1_part-10 parts by weight of polyisocyanate, and 10 parts-100 parts by weight of an organic diluting solvent to obtain a first mixture, mixing the first mixture, and then heating the first mixture for 4 h under N2 atmosphere at 60° C.-80° C. to obtain an isocyanate-terminated prepolymer;
(2) then adding to the first mixture 1 part-20 parts by weight of a dihydroxycoumarin compound, 0.1_parts-0.2 parts by weight of a polyol or polyamine cross-linking agent, and 0.1_parts-0.2 parts by weight of an organotin catalyst to obtain a second mixture, mixing the second mixture, and afterwards heating the second mixture for 2 h under the N2 atmosphere at 60° C.-80° C. to form a polymer solution of polyurethane; and
(3) then adding to the second mixture 1 part-20 parts by weight of a coumarin compound to obtain a third mixture, mixing the third mixture, and then irradiating the third mixture for 4 h with a 365 nm ultraviolet light to obtain the ultraviolet-responsive coumarin controlled-release and self-repairing anti-fouling paint.