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A Recoatable Flexible Fluorocarbon Coating

A fluorocarbon coating and flexible technology, applied in antifouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of steel bridge erosion, loss of protection benefits, cracks and other problems, and achieve comprehensive improvement. Application performance, excellent weather resistance, crack reduction effect

Active Publication Date: 2021-06-29
CHINA RAILWAY ERYUAN ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the conventional fluorocarbon coatings in the prior art, which are generally rigid and poorly adaptable to steel bridges that are prone to deformation. Cracks appear and the protection benefits are lost, leading to the above-mentioned shortcomings of steel bridges being eroded and damaged. A recoatable flexible fluorocarbon coating is provided

Method used

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  • A Recoatable Flexible Fluorocarbon Coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A recoatable flexible fluorocarbon coating according to the invention is a two-component system of A and B.

[0030] Component A: Add 47.2Kg fluorocarbon resin (AGC LF600X) and 4.8Kg butyl acetate into the mixing tank, add 1.63Kg thixotropic agent (Degussa R972), and disperse at a high speed of 800r / min for 20min to uniform;

[0031] Add 0.23Kg dispersant (Digo 610s) at 500r / min speed, after dispersing for 10 minutes, add 13.8Kg rutile titanium dioxide (R818), 0.5Kg carbon black (N660), 1Kg medium chrome yellow, 1.4Kg treated modified Dry wollastonite powder, after dispersing for 30 minutes, grind to fineness below 30μm;

[0032] Add 0.36Kg substrate wetting agent (Digo 450), 0.23Kg defoamer (Merck MOK6021), 0.64Kg light stabilizer (Ciba 5151) and the remaining butyl acetate solvent, at 600r / min Disperse for 20 minutes until uniform, and obtain A component.

[0033] B component: Add 3Kg butyl acetate, 1.9Kg HDI trimer (Bayer 3390) and 12Kg elastic curing agent (Asahi...

Embodiment 2

[0035] A recoatable flexible fluorocarbon coating according to the invention is a two-component system of A and B.

[0036] A component: including 51.5Kg fluorocarbon resin (AGC LF600X), 13.2Kg rutile titanium dioxide (R818), 0.2Kg carbon black (N660), 1.3Kg treated modified wollastonite powder, 1.5Kg bentonite (BP- 183B), 0.2Kg dispersant (Digo 628), 0.2Kg defoamer (Merck MOK6021), 0.62Kg light stabilizer (Ciba 5151), 0.34Kg substrate wetting agent (Digo Wet KL 245 ), 6Kg butyl acetate, 9Kg xylene, the preparation method is with embodiment 1.

[0037] B component: including 10.9Kg elastic curing agent (Asahi Kasei E405-80T), 1.8Kg HDI trimer (BASF HI190B / S), 2.9Kg butyl acetate, the preparation method is the same as in Example 1.

Embodiment 3

[0039] A recoatable flexible fluorocarbon coating according to the invention is a two-component system of A and B.

[0040] A component: including 53.6Kg fluorocarbon resin (AGC LF600X), 12.4Kg rutile titanium dioxide (R962), 1.2Kg treated modified wollastonite powder, 10Kg hyperdispersive rheology additive (Hemings Deqian Benge1828), 1.4Kg wetting and dispersing agent (byk163), 0.21Kg defoamer (BASF Efka EFKA2722), 0.57Kg light stabilizer (Ciba 5151), 0.32Kg substrate wetting agent (Di High tego450), 5Kg butyl acetate, 7.8Kg xylene, 1.2Kg ethylene glycol ethyl ether acetate, preparation method is with embodiment 1.

[0041] B component: including 10.3Kg elastic curing agent (Asahi Kasei E402-90T), 1.7Kg HDI trimer (BASF HI190B / S), 2.6Kg butyl acetate, the preparation method is the same as in Example 1.

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Abstract

The invention discloses a recoatable flexible fluorocarbon coating, which is a two-component system of A and B, adopts a low Tg flexible fluorocarbon resin system, adjusts the ratio of soft and hard curing agent components, and reacts to form soft and hard curing agent after curing. The interpenetrating network structure with interlaced hard segments improves the flexibility of the paint film of the film-forming resin; by adding acicular wollastonite powder treated with a silane coupling agent, the wettability of the fluorocarbon resin to the powder is improved and the cured paint is strengthened The film enhances the mechanical impact resistance of the coating and reduces cracks; the recoatability of the fluorocarbon coating is improved by the compound use of the substrate wetting agent, and the comprehensive application performance of the coating is improved.

Description

technical field [0001] The invention relates to the technical field of surface protection, in particular to a recoatable flexible fluorocarbon paint. Background technique [0002] The construction and improvement of my country's high-speed rail and expressway networks are changing the travel habits and activity rules of Chinese residents, bringing large-scale social and economic benefits. At the same time, long-span steel bridges such as suspension bridges, cable-stayed bridges, and arch bridges Due to the large flexibility, small stiffness and damping, low fundamental frequency, and long period of the long-span steel bridge structure, radial and axial vibrations appear under the action of wind loads and vibrations generated during vehicle traffic. The relative deformation of the direction; fluorocarbon coatings have been more and more used in the field of outdoor steel structure bridge anti-corrosion due to their excellent weather resistance, especially for severe marine corr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/12C09D175/04C09D5/16C09D7/62
CPCC09D5/1668C09D5/1687C09D127/12C08L75/04C08K13/06C08K9/06C08K7/00C08K3/34
Inventor 任万敏任杰王亮赵云鹏朱敏李秀华王玉珏梁春明马雅林段衍鹏宿智利刘晓琴鲁志强李长年张予界王健章新雨
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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