Antifouling coating and use method and use thereof

Patent metadata

Field	Value
Publication number	US-12503610-B2
Application number	US-202218027853-A
Country	US
Kind code	B2
Filing date	Sep 6, 2022
Priority date	Nov 16, 2021
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

The present disclosure provides an antifouling coating and a use method and use thereof. In the antifouling coating of the present disclosure, polyaspartic acid ester is an isocyanate curing agent containing a secondary amine structure. An ester group and aliphatic properties in the polyaspartic acid ester can increase wear resistance of the coating. The polyaspartic acid ester is combined with a polyisocyanate-containing prepolymer in a component A to endow the antifouling coating with desirable toughness and elasticity, such that the antifouling coating has excellent impact and abrasion resistance. In the component A, a polydimethylsiloxane structure is introduced into the hydroxypropyl silicone oil-based isocyanate prepolymer. The polydimethylsiloxane structure can generate microphase separation with a polyurea hard segment and migrate to a surface of the coating, thereby reducing surface energy of the coating to reduce an adhesion between fouling organisms and an interface.

First claim

What is claimed is:

1 . An antifouling coating, comprising a component A and a component B that are separately packaged; wherein
the component A comprises an isocyanate prepolymer; and the isocyanate prepolymer comprises a polypropylene glycol (PPG)-based isocyanate prepolymer and a hydroxypropyl silicone oil-based isocyanate prepolymer; the component B comprises the following raw materials in parts by weight: 30 parts to 50 parts of polyaspartic acid ester and 1.5 parts to 4 parts of a polyaspartic acid powder; and the component A and the component B have a weight ratio of (58-96):(31.6-54.2).

2 . The antifouling coating according to claim 1 , wherein a preparation method of the PPG-based isocyanate prepolymer comprises the following steps:
mixing PPG with isophorone diisocyanate (IPDI) to conduct first prepolymerization to obtain the PPG-based isocyanate prepolymer; wherein the PPG and the IPDI have a mass ratio of (180-300):(65.1-137.9); and the PPG has a weight-average molecular weight of 2,000 to 3,000.

3 . The antifouling coating according to claim 2 , wherein the first prepolymerization is conducted at 80° C. to 85° C. for 2 h to 3 h.

4 . The antifouling coating according to claim 1 , wherein a preparation method of the hydroxypropyl silicone oil-based isocyanate prepolymer comprises the following steps:
mixing hydroxypropyl silicone oil with IPDI to conduct second prepolymerization to obtain the hydroxypropyl silicone oil-based isocyanate prepolymer; wherein the hydroxypropyl silicone oil and the IPDI have a mass ratio of (160-220):(65.4-112.4); and the hydroxypropyl silicone oil has a weight-average molecular weight of 1,000 to 2,000.

5 . The antifouling coating according to claim 4 , wherein the second prepolymerization is conducted at 80° C. to 85° C. for 2 h to 3 h.

6 . The antifouling coating according to claim 1 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of (6-10):(0-4), and the hydroxypropyl silicone oil-based isocyanate prepolymer has a mass of not 0.

7 . The antifouling coating according to claim 2 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of (6-10):(0-4), and the hydroxypropyl silicone oil-based isocyanate prepolymer has a mass of not 0.

8 . The antifouling coating according to claim 3 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of (6-10):(0-4), and the hydroxypropyl silicone oil-based isocyanate prepolymer has a mass of not 0.

9 . The antifouling coating according to claim 4 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of (6-10):(0-4), and the hydroxypropyl silicone oil-based isocyanate prepolymer has a mass of not 0.

10 . The antifouling coating according to claim 5 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of (6-10):(0-4), and the hydroxypropyl silicone oil-based isocyanate prepolymer has a mass of not 0.

11 . The antifouling coating according to claim 6 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of 9:1 to 6:4.

12 . The antifouling coating according to claim 7 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of 9:1 to 6:4.

13 . The antifouling coating according to claim 8 , wherein the PPG-based isocyanate prepolymer and the hydroxypropyl silicone oil-based isocyanate prepolymer have a mass ratio of 9:1 to 6:4.

14 . The antifouling coating according to claim 1 , wherein the polyaspartic acid powder has a weight-average molecular weight of 2,000 to 5,000.

15 . The antifouling coating according to claim 1 , wherein the component B further comprises a catalyst, and the catalyst is one or more selected from the group consisting of dibutyltin dilaurate, triethylamine, and zinc naphthenate.

16 . The antifouling coating according to claim 15 , wherein 0.1 parts by weight to 0.2 parts by weight of the catalyst is used.

17 . A use method of the antifouling coating according to claim 1 , comprising the following steps:
mixing the component A with the component B to obtain the antifouling coating; and coating the antifouling coating on a substrate and conducting curing.

18 . The use method according to claim 17 , wherein the substrate is prepared by one or more selected from the group consisting of glass, steel, wood, bakelite, and plastic.

19 . The use method according to claim 17 , wherein the curing is conducted at 80° C.±2° C.

20 . The antifouling coating according to claim 1 , wherein the antifouling coating is used in the field of marine antifouling.

Assignees

• Univ Harbin Eng

Inventors

• Chen Rongrong
• Zhang Shurui
• Wang Jun
• Zhu Jiahui
• Liu Jingyuan
• Yu Jing
• Liu Qi
• Wang Haotian
• Liu Peili

Classifications

• C09D175/02 Primary

  Polyureas · CPC title

• C09D175/04

  Polyurethanes · CPC title

• C08G18/755

  and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate · CPC title

• C08G18/61

  Polysiloxanes · CPC title

• C09D175/08

  from polyethers · CPC title