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Silicon film coated aluminum pigment as well as preparation method and application thereof

An aluminum pigment and coating technology, applied in inorganic pigment treatment, chemical instruments and methods, powder coatings, etc., can solve the problems of inability to produce high-flash effect coatings, easy agglomeration and scrapping of aluminum pigments, and destruction of aluminum pigments, etc. Achieve the effect of avoiding caking and scrapping, improving the flickering effect, and improving the powdering rate

Inactive Publication Date: 2017-12-22
长沙族兴新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a silicon film-coated aluminum pigment and its preparation method and application to solve the problem that the aluminum pigment is easily agglomerated and scrapped when mixed with powder coatings, the bonding effect is poor, and the aluminum pigment is destroyed and cannot produce a high flash effect. Coating Technical Issues

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  • Silicon film coated aluminum pigment as well as preparation method and application thereof
  • Silicon film coated aluminum pigment as well as preparation method and application thereof
  • Silicon film coated aluminum pigment as well as preparation method and application thereof

Examples

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preparation example Construction

[0038] The present invention also provides a method for preparing the above-mentioned silicon film-coated aluminum pigment, comprising the following steps:

[0039](1) Disperse the aluminum pigment that removes impurity oil in an alcohol solvent, add water and stir, and then add a coupling agent to obtain the first mixed solution; mix water, tetraethyl orthosilicate, and alcohol solvent, and add The pH regulator adjusts the pH to 7.5-11 to obtain the second mixed solution;

[0040] (2) Adding the second mixed solution dropwise to the first mixed solution, and reacting for 4 to 6 hours to obtain the first product solution;

[0041] (3) Mix the coupling agent, tetraethyl orthosilicate and the alcohol solvent, add dropwise to the first product liquid obtained in step (2), and obtain the second product liquid after reacting for 6 to 12 hours; and so on , repeating the reaction of this step, each time adding the amount of coupling agent and the reaction time are all gradually incr...

Embodiment 1

[0061] The silicon film-coated aluminum pigment in this embodiment is a Si—O—Si film with three layers of network structure coated on the outside of the aluminum pigment, and each layer of network structure is connected by a coupling agent. Wherein, the coupling agent is a vinyl silane coupling agent. The particle size of the aluminum pigment is 15 μm.

[0062] The preparation method of above-mentioned silicon film coated aluminum pigment is as follows:

[0063] (1) Remove impurity oil from aluminum pigment: mix 15 parts of aluminum pigment with 50 parts of ether solvent or alcohol solvent in parts by weight, stir at 30°C for 120 minutes, remove impurity oil from aluminum pigment, and filter with suction Keep the solid content at 85%±2 to obtain a clean aluminum pigment, which is stored at 30°C until use.

[0064] (2) Add 10 parts of aluminum pigment and 50 parts of ethanol to the reaction vessel, stir at 30°C until uniformly dispersed, then add 3 parts of water, continue st...

Embodiment 2

[0071] The silicon film-coated aluminum pigment in this embodiment is a Si—O—Si film with four layers of network structure coated on the outside of the aluminum pigment, and each layer of network structure is connected by a coupling agent. Wherein, the coupling agent is a vinyl silane coupling agent. The particle size of the aluminum pigment is 50 μm.

[0072] The preparation method of above-mentioned silicon film coated aluminum pigment is as follows:

[0073](1) Remove impurity oil from aluminum pigment: mix 15 parts of aluminum pigment with 50 parts of ether solvent or alcohol solvent in parts by weight, stir at 30°C for 120 minutes, remove impurity oil from aluminum pigment, and filter with suction Keep the solid content at 85%±2 to obtain a clean aluminum pigment, which is stored at 30°C until use.

[0074] (2) Add 10 parts of aluminum pigment and 45 parts of ethanol to the reaction vessel, stir at 30°C until uniformly dispersed, then add 2 parts of water, continue stir...

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Abstract

The invention discloses silicon film coated aluminum pigment as well as a preparation method and application thereof. The silicon film coated aluminum pigment is aluminum pigment coated with a Si-O-Si film having N layers of network structures, every two adjacent network structures are connected with each other by means of a coupling agent, and N is more than or equal to 3. The silicon film coated aluminum pigment can be used only when being dry mixed with a powder coating, so that the coating rate is increased; a binding process is not needed, so that the problems of caking scrap and poor bonding effects which are caused by difficult control of the process can be avoided, the aluminum pigment is not damaged, and the metallic luster effect is guaranteed; furthermore, after the aluminum pigment is sprayed, the twinkle effect of a paint film is improved; in addition, the paint film is high in surface hydrophobicity, so that the acid and alkali resistance and weather resistance of the paint film are greatly improved. The coupling agent comprises long chains of polycarbon and functional groups; in a reaction process, the long-chain carbon has a steric hindrance effect and the hydrolyzed functional groups contain charges of the same properties, so that the particles of the aluminum pigment do not agglomerate by means of adsorption, and the phenomenon of caking scrap is avoided.

Description

technical field [0001] The invention relates to the field of aluminum pigments, in particular to a silicon film-coated aluminum pigment. In addition, the present invention also relates to a preparation method and application of the silicon film-coated aluminum pigment. Background technique [0002] With the improvement of environmental protection requirements, VOC-containing liquid metal effect paints will gradually be eliminated from the market, and bonding powder coatings that meet environmental protection requirements and have metal effects will play an important role in this transformation. In the bonded powder coating, the content of metallic pigment can reach 10-20%, and the coating effect is completely comparable to that of liquid paint. In addition, the recycled powder of Bonding powder coating can be reused, reducing waste and reducing spraying costs. [0003] The existing bonding technology is to bond the aluminum powder on the surface of the resin powder. The lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/64C09C3/06C09C3/12C09D5/03C09D7/12
CPCC09C1/648C09C3/006C09D5/035
Inventor 温振华赵守元石龙
Owner 长沙族兴新材料股份有限公司
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