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A water-based anti-rust sealant

A sealant, water-based technology, used in anti-corrosion coatings, coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor corrosion resistance, adhesion effect, etc., to improve mechanical properties, improve adhesion, and improve anti-penetration. performance effect

Active Publication Date: 2021-06-01
山东合创涂层技术有限公司
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a water-based anti-rust sealant for the problems of poor adhesion and corrosion resistance of commonly used water-based anti-rust sealants

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0028] The preparation method of composite antirust component A comprises the steps:

[0029] (1) In a water bath at 30~45°C, mix and stir polyoxypropylene glycol, chain extender, and dibutyltin dilaurate at a mass ratio of 7:3:0.01~0.04, and heat up at 4~8°C / min To 80~90℃, keep warm for 15~30min to get the prepolymer, take 30~45% dimethylformamide of the prepolymer, mix and stir evenly, pour it into the polytetrafluoroethylene grinding tool, and put it at 50~60 Volatilization reaction at ℃ for 24~36h, heat treatment at 0.1MPa vacuum degree and 80~100℃ for 1~3h to constant weight, to obtain polyurethane urea;

[0030] (2) Mix sodium alginate and water in a container according to the mass ratio of 1:8~12, stir at 300~500r / min for 20~45min, let it stand for swelling for 3~5h, add 10~15% sodium alginate For iodic acid, heat up to 75~85°C, heat and stir at 400~600r / min for 2~4, add microcrystalline cellulose with 40~60% sodium alginate mass, stir for 3~5 hours, and discharge to o...

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Abstract

The invention discloses a water-based antirust sealant, which belongs to the field of metal protection. In the present invention, after sodium alginate is dispersed by ultrasonic waves, the adjacent diol structure of sodium alginate becomes a dialdehyde structure under the oxidation of sodium periodate, and the aldehyde group in polyaldehyde sodium alginate can be combined with that in microcrystalline cellulose. The active hydroxyl group undergoes partial aldol condensation, and the adsorption and fixation of free iron ions can effectively reduce the possibility of corrosion; the aluminum powder slurry made of aluminum powder in the present invention improves the polyurethane urea in aluminum powder and composite antirust component A. It can improve the anti-corrosion effect of the closed anti-rust film, and the adhesion and corrosion resistance after use can be effectively improved. The invention solves the problems of poor adhesion and corrosion resistance of the commonly used water-based antirust sealant at present.

Description

technical field [0001] The invention belongs to the field of metal protection, and in particular relates to a water-based antirust sealant. Background technique [0002] Before the steel surface is painted, sprayed or electroplated, the steel surface must be pretreated with phosphating and passivation to improve the rust resistance and adhesion of the steel surface. In traditional industries, manual derusting or pickling derusting is used. Manual rust removal is the earliest surface treatment method, which is used for small areas and places where sandblasting is not required. It can remove attached scale, rust products, loose paint and other sundries. At present, phosphate conversion coating treatment is widely used in automobiles, ships, machinery manufacturing, aerospace and household appliances and other products. The pickling solution in the pickling and rust removal process is generally a mixture of various acids, mainly sulfuric acid, nitric acid and hydrofluoric aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C09D105/04C09D5/10C09D7/61C09D7/63C09D7/65
CPCC08K2003/0812C08L2205/03C09D5/103C09D175/02C09D7/61C09D7/63C09D7/65C09D5/04C09D1/04C08K13/06C08K9/04C08K3/08C08K3/24C08K5/098
Inventor 胡次兵陈建春庞成荣
Owner 山东合创涂层技术有限公司
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