Self-cleaning phosphorus-free film forming agent and preparation method and application thereof

A film-forming agent and self-cleaning technology, which is applied in the coating process of metal materials, can solve the problems of complex composition of film-forming agents, poor salt spray resistance, and unreasonable design, so as to achieve good coating adhesion and improve durability. Corrosive, compositionally simple effects

Active Publication Date: 2019-01-25
青岛海创化学品有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a self-cleaning phosphorus-free film-forming agent and its preparation method and application, which solves the problems of complex components...

Method used

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  • Self-cleaning phosphorus-free film forming agent and preparation method and application thereof
  • Self-cleaning phosphorus-free film forming agent and preparation method and application thereof
  • Self-cleaning phosphorus-free film forming agent and preparation method and application thereof

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preparation example Construction

[0041] A kind of preparation method of self-cleaning phosphorus-free film-forming agent of the present invention, comprises the following steps:

[0042] 1) Take deionized water, the amount of which is half of the total amount of deionized water, stir, and under stirring conditions, add fluorozirconate, and continue stirring to obtain mixture A;

[0043] 2) Under stirring conditions, slowly add epoxy silane to the mixture A obtained in step 1), and continue stirring to obtain mixture B;

[0044] 3) Under the condition of stirring, in the mixture B obtained in step 2), add the anti-corrosion additive and the activation additive in sequence, and continue stirring to obtain the mixture C;

[0045] 4) Supplement the remaining deionized water, continue to stir for 1-2 hours, let stand for 1-2 hours, filter and fill to obtain a film-forming agent.

[0046] Preferably, the stirring speed during stirring in the step 1), the step 2) and the step 3) is 20-50r / min; the addition speed of...

Embodiment 1

[0053] A kind of preparation method of self-cleaning phosphorus-free film-forming agent of the present invention, comprises the following steps:

[0054] 1) Take 500Kg of deionized water, add it into a reaction kettle with a stirring device, turn on the stirring device, the stirring speed is 30r / min, add 20Kg of ammonium fluorozirconate, and continue stirring for 15min to obtain a mixture A;

[0055] 2) Keep the stirring speed constant, slowly add epoxy agent silane KH-56020Kg to the mixture A obtained in step 1), and continue stirring for 30 minutes to obtain the mixture B;

[0056] 3) Keep the stirring speed constant, add 6Kg of anti-corrosion additive sodium molybdate and 5Kg of activation additive nonylphenol polyoxyethylene polyoxypropylene ether (3132) to the mixture B obtained in step 2), and continue stirring for 1h to obtain mixture C;

[0057] 4) Supplement the remaining deionized water, continue to stir for 1 hour, let stand for 2 hours, filter and fill to obtain a...

Embodiment 2

[0069] A kind of preparation method of self-cleaning phosphorus-free film-forming agent of the present invention, comprises the following steps:

[0070] 1) Take 500Kg of deionized water, add it into a reaction kettle with a stirring device, turn on the stirring device, the stirring speed is 20r / min, add 10Kg of sodium fluozirconate, and continue stirring for 30min to obtain a mixture A;

[0071] 2) Keep the stirring speed constant, slowly add 10Kg of epoxy agent silane in the mixture A obtained in step 1), the addition speed of epoxy silane is 1000g / min, continue to stir for 60min, and obtain mixture B; epoxy silane is trimethyl A mixture of oxysilane, methyldimethoxysilane, and ethyltrimethoxysilane in a weight ratio of 1:2:3;

[0072] 3) Keep the stirring speed constant, add 5Kg of anti-corrosion additive ammonium molybdate and 10Kg of activation additive—polyoxyethylene polyoxypropylene ether into the mixture B obtained in step 2), and continue stirring for 2 hours to obta...

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Abstract

The invention belongs to the technical field of film forming agents and discloses a self-cleaning phosphorus-free film forming agent and a preparation method and application thereof to metal plates. The self-cleaning phosphorus-free film forming agent is prepared from, by weight, 1-6% of fluorozirconate, 1-6% of epoxy silane, 0.5-3% of a corrosion-resistant auxiliary agent, 0.5-2% of an auxiliaryactivator and the balance deionized water, wherein the corrosion-resistant auxiliary agent refers to any one or two of sodium molybdate and ammonium molybdate, and the auxiliary activator refers to any one or more of stearic acid, sodium alkyl benzene sulfonate, polyalcohol and polyoxyethylene polyoxypropylene ether. The self-cleaning phosphorus-free film forming agent is obtained by modificationthrough epoxy silane and the auxiliary activator and used for pretreatment of the metal plates, and uniformity in film forming, film layer compactness, freeness of rust, great salt spray resistance and long service life are realized; a degreasing station is avoided, multiple washing stations are reduced, and accordingly space saving and cost reduction are realized, sewage discharge is reduced, andconvenience in coating is achieved.

Description

technical field [0001] The invention belongs to the technical field of film-forming agents, in particular to a self-cleaning non-phosphorus film-forming agent and its preparation method and application. Background technique [0002] Metal sheets such as steel and aluminum need to be pretreated before painting or plastic spraying in order to improve the adhesion and rust resistance of the coating and metal, which is called pre-painting treatment in the industry. The pre-painting treatment process includes three parts: oil removal, rust removal and phosphating, among which phosphating is the central link. Phosphating is the process of chemical and electrochemical reactions to form a phosphate chemical conversion film. The formed phosphate conversion film is called a phosphating film. The purpose of metal phosphating is mainly to provide protection for the base metal, to a certain extent prevent the metal from being Corrosion: Used for pre-painting treatment to improve the adh...

Claims

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Application Information

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IPC IPC(8): C23C22/05C23C22/78C23C22/76
CPCC23C22/05C23C22/76C23C22/78
Inventor 朱培礼黄聿川官晓龙
Owner 青岛海创化学品有限责任公司
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