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A kind of anti-flash rust agent and its preparation method and application

An anti-flash rust agent and reaction technology, applied in the direction of anti-corrosion coatings, etc., can solve the problems of complex compound components, poor long-term performance, and heavy metals

Active Publication Date: 2020-10-30
岳阳凯门水性助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing anti-flash rust agents all have problems such as complex compound components, heavy metals, and poor long-term performance.

Method used

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  • A kind of anti-flash rust agent and its preparation method and application
  • A kind of anti-flash rust agent and its preparation method and application
  • A kind of anti-flash rust agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The preparation method of anti-flash rust agent described in the present embodiment, comprises the steps:

[0062] (a) Add 126g (1mol) of 3,5-dimethyl-1-hexyn-3-ol into the reaction flask, then add 0.5g (8.9mmol) of potassium hydroxide catalyst, and heat up to 60-70°C , dropwise the ethylene oxide of 220g (5mol), after the dropwise addition, heat preservation reaction 2h, obtain terminal alkynyl alkoxy product; The NMR spectrum of the terminal alkynyl alkoxy product prepared by present embodiment is as follows figure 1 shown;

[0063] (b) Cool down the alkynyl-terminated alkoxy product obtained in step (a) to 40°C, add 47g (0.33mol) of phosphorus pentoxide in batches, stir and dissolve, then raise the temperature to 70°C and keep it warm for 1 hour to obtain phosphoric acid ester End alkynyl alkoxy products;

[0064] (c) Add 118 g (1.3 mol) of N,N-dimethylethanolamine to the phosphorylated alkynyl-terminated alkoxy product obtained in step (b), and stir and react at r...

Embodiment 2

[0068] The preparation method of anti-flash rust agent described in the present embodiment, comprises the steps:

[0069] (a) Add 126g (1mol) of 3,5-dimethyl-1-hexyn-3-ol into the reaction flask, then add 0.5g (8.9mmol) of potassium hydroxide catalyst, and heat up to 60-70°C , dropwise the propylene oxide of 290g (5mol), after dropwise addition, heat preservation reaction 2h, obtain terminal alkynyl alkoxy product;

[0070] (b) Cool down the alkynyl-terminated alkoxy product obtained in step (a) to 40°C, add 47g (0.33mol) of phosphorus pentoxide in batches, stir and dissolve, then raise the temperature to 70°C and keep it warm for 1 hour to obtain phosphoric acid ester End alkynyl alkoxy products;

[0071] (c) Add 118 g (1.3 mol) of N,N-dimethylethanolamine to the phosphorylated alkynyl-terminated alkoxy product obtained in step (b), and stir and react at room temperature to obtain the anti-flash rust agent.

[0072] Characterization of the product:

[0073] The average mol...

Embodiment 3

[0075] The preparation method of anti-flash rust agent described in the present embodiment, comprises the steps:

[0076] (a) Add 126g (1mol) of 3,5-dimethyl-1-hexyn-3-ol into the reaction flask, then add 0.5g (8.9mmol) of potassium hydroxide catalyst, and heat up to 60-70°C , dropwise the ethylene oxide of 176g (4mol) and the propylene oxide of 58g (1mol), after the dropwise addition is completed, keep warm for 2h to obtain the alkynyl-terminated alkoxy product;

[0077] (b) Cool down the alkynyl-terminated alkoxy product obtained in step (a) to 40°C, add 47g (0.33mol) of phosphorus pentoxide in batches, stir and dissolve, then raise the temperature to 70°C and keep it warm for 1 hour to obtain phosphoric acid ester End alkynyl alkoxy products;

[0078] (c) Add 118 g (1.3 mol) of N,N-dimethylethanolamine to the phosphorylated alkynyl-terminated alkoxy product obtained in step (b), and stir and react at 25° C. to obtain the anti-flash rust agent.

[0079] Characterization of...

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Abstract

The invention relates to the technical field of anti-flash rust agents, in particular to an anti-flash rust agent as well as a preparation method and application thereof. The anti-flash rust agent takes an alkoxy chain as a main chain, one end of the alkoxy chain as the main chain comprises alkynyl, and the other end of the alkoxy chain as the main chain comprises phosphate salt. The anti-flash rust agent comprises two functional groups, namely the alkoxy and the phosphate salt; not only can the adsorption and the coordination be performed on the surface of a substrate to effectively prevent the formation of flash rust in a waterborne coating, but also the problem of return to rust in water after a waterborne coating paint film is dried can be solved; the anti-flash rust agent can be applied to the various fields, in particular to the field of coatings and can be firmly absorbed on the surface of the substrate to form a protective film within a short time, thereby showing excellent rust resistance and salt fog resistance and achieving the purpose of long-time rust resistance.

Description

technical field [0001] The invention relates to the technical field of anti-flash rust, in particular to an anti-flash rust agent and its preparation method and application. Background technique [0002] Waterborne acrylic emulsions are widely used in architectural coatings, but when applied to metal substrates, waterborne industrial coatings formulated with traditional acrylic emulsions have always had problems with flash rust. [0003] Flash rust is a kind of corrosion phenomenon that occurs on the metal surface during the drying process of the paint film. There are two main causes: one is the electrochemical phenomenon. The water-based emulsion contains more water when the paint is mixed, and the water in the paint volatilizes when the paint film is formed. Slower, and the viscosity of the paint is higher, resulting in a higher surface tension, unable to infiltrate the tiny pores on the metal surface, moisture and oxygen undergo proton transfer reactions on the metal surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26C08G65/327C08G65/333C08G65/338C09D5/08
CPCC08G65/2609C08G65/327C08G65/33396C08G65/338C09D5/08
Inventor 卓耀文周海军廖有为
Owner 岳阳凯门水性助剂有限公司
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