	US 12,077,679 B2
	Intumescent fire-retardant coating with ultra-high corrosion resistance and preparation method thereof
Jianghai Fang, Quanzhou (CN); Lizong Dai, Quanzhou (CN); Qingliang Liu, Quanzhou (CN); Yansong Liu, Quanzhou (CN); Huanhuan Xu, Quanzhou (CN); and Chun'e Guo, Quanzhou (CN)
Assigned to FUJIAN SOUTH PEAK FIRE PREVENTION TECHNOLOGY CO., LTD., Quanzhou (CN); and XIAMEN UNIVERSITY, Xiamen (CN)
Filed by FUJIAN SOUTH PEAK FIRE PREVENTION TECHNOLOGY CO., LTD., Quanzhou (CN); and XIAMEN UNIVERSITY, Xiamen (CN)
Filed on Nov. 24, 2021, as Appl. No. 17/456,499.
Claims priority of application No. 202011407415.2 (CN), filed on Dec. 3, 2020.
Prior Publication US 2022/0177713 A1, Jun. 9, 2022
Int. Cl. C09D 5/18 (2006.01); C09D 5/02 (2006.01); C09D 5/08 (2006.01); C09D 7/43 (2018.01); C09D 7/61 (2018.01); C09D 7/65 (2018.01); C09D 123/08 (2006.01); C09D 131/04 (2006.01)

CPC C09D 5/185 (2013.01) [C09D 5/022 (2013.01); C09D 5/084 (2013.01); C09D 7/43 (2018.01); C09D 7/61 (2018.01); C09D 7/65 (2018.01); C09D 131/04 (2013.01)]

8 Claims

1. An intumescent fire-retardant coating composition with ultra-high corrosion resistance, comprising:

13-20 mass % of water;

0.3-0.6 mass % of wetting and dispersing agent;

0.2-0.5 mass % of defoaming agent;

12-20 mass % of composite carbon-forming catalyst;

6-10 mass % of composite blowing agent;

6-10 mass % of pentaerythritol;

3-6 mass % of titanium dioxide;

4-8 mass % of Mg(OH)₂;

3-6 mass % of mica powder;

3-7 mass % of kaolin;

3-7 mass % of anti-rust pigment;

4-7 mass % of aluminum tripolyphosphate;

11-21 mass % of vinyl acetate-ethylene (VAE) emulsion;

0.6-0.8 mass % of freeze-thaw agent;

1.0-1.8 mass % of film-forming aid; and

0.2-0.5 mass % of thickener;

based on the overall mass of the composition;

wherein the composite carbon-forming catalyst is a mixture of ammonium polyphosphate and calcium phytate, and the mass ratio of the ammonium polyphosphate and calcium phytate is 2:1; and

wherein the composite blowing agent is a mixture of melamine and chlorinated paraffin, and the mass ratio of melamine and chlorinated paraffin is 2:1.

8. A method for preparing the intumescent fire-retardant coating composition with ultra-high corrosion resistance according to claim 1, comprising the following steps:

(1) adding relative amounts of said water, wetting and dispersing agent, and defoaming agent to a disperser and stirring at a rotation speed of 300-400 revolutions/minute for 3-5 minutes;

(2) adding relative amounts of said composite carbon-forming catalyst, composite blowing agent, pentaerythritol, titanium dioxide, Mg(OH)₂, mica powder, kaolin, anti-rust pigment, and aluminum tripolyphosphate in sequence at a rotation speed of 400-900 revolutions/minute, adjusting the rotation speed to 1800-2000 revolutions/minute, and dispersing for 45-60 minutes; and

(3) adding relative amounts of said VAE emulsion, freeze-thaw agent, film-forming aid, and thickener at a rotation speed of 700-900 revolutions/minute;

wherein steps (1), (2), and (3), and the relative amounts thereof, yield the intumescent fire-retardant coating composition with ultra-high corrosion resistance according to claim 1.