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Method for increasing dispersiveness of inorganic oxide powder in organic medium

An inorganic oxide and dispersive technology, applied in the treatment of dyed polymer organic compounds, etc., can solve the problems of high cost of organic solvent recovery and treatment, and achieve the effect of improving compatibility

Inactive Publication Date: 2004-02-11
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can be successfully used to modify the surface of some pigments, but because most of the initiators are unstable compounds, it is bound to encounter great difficulties or require special equipment for surface treatment of inorganic particles, and the cost of organic solvent recovery and treatment is very high, and Easy to form a dense coating layer on the surface of the particles, changing the hue of various oxide powders used as pigments and fillers

Method used

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  • Method for increasing dispersiveness of inorganic oxide powder in organic medium
  • Method for increasing dispersiveness of inorganic oxide powder in organic medium
  • Method for increasing dispersiveness of inorganic oxide powder in organic medium

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Put 200g of titanium dioxide powder (DuPont R902 type) in a 5000ml plastic beaker, add 3000ml of deionized water and 8g of sodium dodecylsulfonate, and disperse for 0.5hr at a high-speed disperser at 1000r / min. Transfer the dispersed slurry into a device equipped with stirring, heating and nitrogen protection, add 60 g of methyl methacrylate, stir for 15 minutes and then raise the temperature to 100°C. An aqueous solution containing 3 g of potassium persulfate was added to initiate polymerization, and the temperature was kept at 100° C. for 2 hours. The discharge was suction filtered and dried at 70°C for 5hr. The dispersibility test results of the powder after drying are shown in Table 1. SEM photo see figure 1 with figure 2 .

Embodiment 2

[0031] Put 200g of ordinary iron oxide yellow (type 313 of Shanghai Yipin International Pigment Co., Ltd.) into a 5000ml plastic beaker, add 3000ml of deionized water and 15g of sodium dodecylbenzenesulfonate, and disperse for 0.5hr at a high-speed disperser at 1000r / min. Transfer the dispersed slurry into a device with stirring, heating and nitrogen protection, add 45g of butyl methacrylate and 30g of methacrylic acid in batches, stir for 15min and then raise the temperature to 40°C. An aqueous solution containing 3 g of potassium persulfate was added to initiate polymerization, and the mixture was kept at 50° C. for 5 hr. The discharge was suction filtered and dried at 60°C for 5hr. The dispersibility test results of the dried powder are shown in Table 1, and the heat resistance properties are shown in Table 2. SEM photo see image 3 with Figure 4 .

Embodiment 3

[0033] Put 150g of ordinary iron oxide red (Shanghai Yipin International Pigment Co., Ltd. 130 type) in a 5000ml plastic beaker, add 3000ml of deionized water and 7g of ammonium lauryl sulfate, and disperse for 0.5hr at a high-speed disperser at 1000r / min. Transfer the dispersed slurry into a device equipped with stirring, heating and nitrogen protection, add 10 g of acrylic acid, 20 g of ethyl acrylate and 25 g of methyl acrylate in batches, stir for 15 minutes and then raise the temperature to 60°C. An aqueous solution containing 3 g of potassium persulfate was added to initiate polymerization, and the mixture was kept at 60° C. for 4 hours. The discharge was suction filtered and dried at 70°C for 5hr. The dispersibility test results of the powder after drying are shown in Table 1. SEM photo see Figure 5 with Image 6 .

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Abstract

By means of in-situ emulsion polymerization on the surface of particle to modify the surface of inorganic oxide powder, the compatibility between inorganic oxide powder and non-polar medium is improved and the dispersivity of the inorganic oxide powder in paint, plastic, rubber, adhesive and other medium is raised. The method includes the following steps: dispersing inorganic oxide powder and surfactant in water to obtain slurry; adding monomer and peroxide as initiator into the slurry to initiate polymerization; and collecting and drying the product as the modified inorganic oxide powder. The modified inorganic oxide powder is suitable for use in paint, plastic, rubber, adhesive and other fields.

Description

technical field [0001] The invention relates to a preparation method of inorganic oxide powder, in particular to a method for improving the dispersibility of inorganic oxide powder in organic medium or non-polar medium and weak polar medium, especially to a method of using powder particle surface The in-situ polymerization method is used to modify the surface to improve the interfacial compatibility between the particles and the organic medium. Background technique [0002] With the rise of the nanomaterial development boom in recent years, the ultrafine research of inorganic oxide powders is in full swing. Compared with bulk materials, ultrafine powders exhibit many unique properties in terms of optics, heat, electricity, magnetism and mechanics. For example, nano-titanium dioxide has unique functions such as color, photocatalysis, and ultraviolet shielding, and has broad application prospects in the automotive industry, cosmetics, water treatment, sterilization, and envir...

Claims

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Application Information

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IPC IPC(8): C09C3/10
Inventor 吴秋芳陈雪梅曹宏明杨景辉韩要星陈建定马新胜张海英
Owner SHANGHAI HUAMING HI TECH GRP
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