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Preparation method capable of realizing chemical blending of modified nano silicon dioxide particles in acrylate monomer

A nano-silica and acrylate technology, applied in the treatment of dyed organosilicon compounds, fibrous fillers, coatings, etc., can solve the problems of poor dispersion of nano-silica, cumbersome industrialization steps, and poor long-term storage stability. To achieve uniform distribution, improve wear resistance, increase the effect of uniform dispersion

Inactive Publication Date: 2013-02-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at defects such as the poor dispersion of nano-silica prepared in acrylate monomers, poor long-term storage stability, and cumbersome industrialization steps, the purpose of the present invention is to:

Method used

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  • Preparation method capable of realizing chemical blending of modified nano silicon dioxide particles in acrylate monomer
  • Preparation method capable of realizing chemical blending of modified nano silicon dioxide particles in acrylate monomer

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Put 2g of deionized water, 10ml of ammonia water (analytical grade, mass fraction 25%), and 200ml of absolute ethanol (analytical grade) into a 1000ml four-necked flask and stir at room temperature. Using a constant pressure dropping funnel, drop 20g of tetraethyl orthosilicate (TEOS) into the flask and react at 40°C for 5h to prepare nano silicon dioxide. Among them, ammonia water and deionized water are catalysts.

[0030] (2) Lower the nano-silica prepared in step (1) to room temperature, pass N through the solution 2 After half an hour, use a constant pressure dropping funnel to drop 4g of γ-methacryloxypropyltrimethoxysilane into the flask, and after the addition, the solution is heated to 50°C and passed through N 2 After reacting for 12 hours, modified nano-silica was prepared.

[0031] (3) Mix the solution obtained in step (2) with 14.7g of 1,6-hexanediol diacrylate monomer, and use a constant pressure dropping funnel to mix the polymerization inhibitor (0...

Embodiment 2

[0037] (1) Put 4g of deionized water, 20ml of ammonia water (analytical grade, mass fraction 25%), and 300ml of absolute ethanol (analytical grade) into a 1000ml four-necked flask and stir at room temperature. Using a constant pressure dropping funnel, drop 30g of tetraethyl orthosilicate (TEOS) into the flask and react at 50°C for 8h to prepare nano silicon dioxide. Among them, ammonia water and deionized water are catalysts.

[0038] (2) Lower the nano-silica prepared in step (1) to room temperature, pass N through the solution 2After half an hour, use a constant pressure dropping funnel to drop 3g of γ-(methacryloxy)propylmethyldimethoxysilane into the flask. 2 After reacting for 18 hours, modified nano-silica was prepared.

[0039] (3) Mix the solution obtained in step (2) with 9.45 g of trimethylolpropane triacrylate monomer, and use a constant pressure dropping funnel to mix the polymerization inhibitor (0.5% by mass fraction of p-hydroxyanisole) and three Methylolpro...

Embodiment 3

[0045] (1) Put 6g of deionized water, 30ml of ammonia water (analytical pure, mass fraction 25%), and 400ml of absolute ethanol (analytical pure) into a 1000ml four-necked flask and stir at room temperature. Using a constant pressure dropping funnel, drop 40g of tetraethyl orthosilicate (TEOS) into the flask and react at 60°C for 10h to prepare nano silicon dioxide. Among them, ammonia water and deionized water are catalysts.

[0046] (2) Lower the nano-silica prepared in step (1) to room temperature, pass N through the solution 2 After half an hour, use a constant pressure dropping funnel to drop 2g of γ-methacryloxypropyl triethoxysilane into the flask. 2 After reacting for 24 hours, modified nano-silica was prepared.

[0047] (3) Mix the solution obtained in step (2) with 6.3 g of trifluorooctyl methacrylate monomer, and use a constant pressure dropping funnel to mix the polymerization inhibitor (0.5% by mass fraction of p-hydroxyanisole) and formaldehyde Add trifluorooc...

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Abstract

A preparation method capable of realizing chemical blending of modified nano silicon dioxide particles in an acrylate monomer relates to the field of the application of uniform dispersity of acryloyl oxygen radical contained silane couplint agent modified nano silicon dioxide particles in the acrylate monomer and the application of photocuring products in coating material. According to the method, the modified silicon dioxide is formed in a way that alkoxy on silane couplint agent and hydroxy on the surfaces of the nano silicon dioxide particles are reacted to form firm silicon-oxygen-silicon bonds; the double-bond silane couplint agent modified nano silicon dioxide is mixed in the monomer; during the photopolymerization process of the product, the acryloyl oxygen radical contained silane couplint agent modified nano silicon dioxide and the monomer are polymerized through the chemical bonds, so as to allow the nano silicon dioxide to be more uniformly distributed in the polymer; and the acryloyl oxygen radical contained silane couplint agent modified nano silicon dioxide particles are subjected to laser size analysis and transmission electron microscopy. The purpose of improving the application of the nano silicon dioxide composite acrylate monomer in the coating material field is achieved.

Description

technical field [0001] The invention relates to the uniform dispersibility of nano silicon dioxide particles in acrylic monomers modified by a silane coupling agent containing acryloyloxy groups and the application of photocured products in coatings. Background technique [0002] The atomic particle size of nano-silica is between several nanometers and hundreds of nanometers, and its specific surface area is large. It is a white, non-toxic, odorless and amorphous inorganic fine chemical product. It has many functions such as good reinforcement, thickening, thixotropy, extinction, anti-ultraviolet and sterilization. The application characteristics of nano-silica in coatings: scrub resistance, weather resistance, stain resistance and self-cleaning properties, antibacterial properties, hydrophobic anti-corrosion properties, transparency, increased hardness, thermal stability, and increased viscosity. Due to the excellent properties of nano-silica, nano-silica-organic composite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/12C08F292/00C09D7/12
Inventor 聂俊曹宝学马贵平
Owner BEIJING UNIV OF CHEM TECH
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