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Modified inorganic nanoparticles and preparation method thereof

A technology for the modification of inorganic nanoparticles, which is applied in the treatment of inorganic pigments, chemical instruments and methods, and the treatment of dyed organosilicon compounds. Incomplete and other problems, to achieve the effect of reducing VOC emissions, reducing usage, and improving grinding efficiency

Pending Publication Date: 2021-09-07
广东海浦倍尔新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the mechanical force of the magnetic stirrer used in the modification is weak, and it is difficult to open the nanoparticle aggregates, resulting in incomplete modification of the particle surface; on the other hand, the selection of the modifier is only for dispersion. The combination between the particles and the organic matrix is ​​not tight. When the coating resists external loss, the nanoparticle solvent slips or falls off, so the mechanical properties of the coating are limited.

Method used

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  • Modified inorganic nanoparticles and preparation method thereof
  • Modified inorganic nanoparticles and preparation method thereof
  • Modified inorganic nanoparticles and preparation method thereof

Examples

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Embodiment 1

[0045] An embodiment of the modified inorganic nanoparticles of the present invention, the modified inorganic nanoparticles of this embodiment are prepared by the following method:

[0046] (1) Pre-hydrolysis: according to H 2 The ratio of O: γ-methacryloxytrimethoxysilane (KH570): ethanol = 13.5: 9: 27g, first mix the ethanol and water, then add γ-methacryl while stirring with a magnet Oxytrimethoxysilane (KH570), continue to stir for 3 minutes after adding, then add acetic acid dropwise, adjust the pH value to 4 (pH meter test), the water bath temperature is 50 degrees, and hydrolyze for 3 hours;

[0047] (3) Pre-mixing: add isopropanol to 400g in the hydrolyzed solution for later use, this is solution A;

[0048] (4) Grinding and modifying: the zirconium beads with a diameter of 0.6 mm are filled into the grinding chamber of a 0.3L sand mill, and the volume filling rate of the zirconium beads in the grinding chamber is 80%; Pour in, start the sand mill, and gradually add ...

Embodiment 2

[0051] An embodiment of the modified inorganic nanoparticles of the present invention, the modified inorganic nanoparticles of this embodiment are prepared by the following method:

[0052] (1) Pre-hydrolysis: according to H 2 The ratio of O: γ-methacryloxytrimethoxysilane (KH570): ethanol = 13.5: 9: 27g, first mix the ethanol and water, then add γ-methacryl while stirring with a magnet Oxytrimethoxysilane (KH570), continue to stir for 3 minutes after adding, then add acetic acid dropwise, adjust the pH value to 4 (pH meter test), the water bath temperature is 50 degrees, and hydrolyze for 3 hours;

[0053] (2) Pre-mixing: add isopropanol to 400g in the hydrolyzed solution for later use, this is solution A;

[0054] (3) Grinding and modifying: then the zirconium beads of 0.6 mm in diameter are filled into the grinding cavity of the 0.3L sand mill, and the volume filling rate of the zirconium beads in the grinding cavity is 80%; Pour it into the mouth, start the sand mill, an...

Embodiment 3

[0057] An embodiment of the modified inorganic nanoparticles of the present invention, the modified inorganic nanoparticles of this embodiment are prepared by the following method:

[0058] (1) Pre-hydrolysis: according to H 2 O: KH560: ethanol = 13.5: 9: 27g ratio, first mix ethanol and water, then add KH560 while stirring with a magnet, continue stirring for 3 minutes after adding, then add acetic acid dropwise, adjust the pH value to 4( pH meter test), water bath temperature is 50 degrees, hydrolysis 3h;

[0059] (2) Pre-mixing: add isopropanol to 400g in the hydrolyzed solution for later use, this is solution A;

[0060] (3) Grinding and modifying: the zirconium beads with a diameter of 0.6mm are filled in the grinding cavity of a 0.3L sand mill, and the volume filling rate of the zirconium beads in the grinding cavity is 80%; Pour in, start the sand mill, and gradually add nano-silica powder, wherein the ratio of powder to modifier is SiO 2 : KH560=1:1; adjust the temp...

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Abstract

The invention discloses a modified inorganic nano particle. The modified inorganic nano particle comprises an inorganic nano particle and a surface grafting modification chain segment bonded with the inorganic nano particle, the surface grafting modified chain segment comprises at least one polymerizable group; the surface grafting modification chain segment is bonded with the inorganic nano particles through a -SiR1R2-group and / or-R1OTiOR2-group; wherein R1R2 is at least one of alkyl, alkoxy, alkynyl, aryl, acrylic acid group, ester group, ether group and carboxyl. When the modified inorganic nanoparticles are used in the hardening liquid, the use amount of a dispersing agent can be reduced, even the inorganic nanoparticles can be stably dispersed without adding the dispersing agent, so that the negative influence of the dispersing agent, especially a macromolecular dispersing agent, on the hardening effect of the inorganic nanoparticles in a coating can be effectively reduced; and meanwhile, the mechanical property of the coating can be effectively improved.

Description

technical field [0001] The invention relates to a modification of inorganic nanoparticles, in particular to a modified inorganic nanoparticle and a modification method thereof applied in the coating field. Background technique [0002] Coating is a complex multi-phase dispersion system composed of film formers, dispersion media, fillers and additives. Each component plays its role in the process of forming a coating. The fillers are dispersed in the film formers in a fine solid state. To increase the mechanical strength of the coating, etc. During the dispersion process, the filler opens the aggregates with the help of mechanical force, and at the same time interacts with the dispersion medium and the film-former—the process of wetting, dispersion, and stabilization to form a stable dispersion system. Therefore, the dispersibility of the filler is related to its crystal form, particle size and particle size distribution, and more importantly, its surface properties - surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/30C09C1/40C09C3/04C09C3/12C09D7/62
CPCC09C1/3081C09C1/3018C09C1/309C09C1/407C09C3/006C09C3/041C09C3/12C09D7/62C09D7/67C09D7/68C01P2004/62C01P2004/64
Inventor 邹新艺祝邦瑞秦晓光
Owner 广东海浦倍尔新材料有限公司
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