Silicon dioxide, preparation and use thereof

A technology of silicon dioxide and emulsifier, applied in the direction of silicon dioxide, silicon oxide, coating, etc., can solve the problem of unsatisfactory performance of matting agent, and achieve smooth hand feeling, good storage performance and high matting efficiency. Effect

Inactive Publication Date: 2012-07-04
北京航天赛德科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of this matting agent is not very satisfactory

Method used

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  • Silicon dioxide, preparation and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Inject 200g of wax emulsion with a concentration of 5wt% into 1000ml of sodium silicate solution with a concentration of 1.2M, and then add the sodium silicate solution into a reaction kettle with a stirring device. Add dilute sulfuric acid with a concentration of 30wt% to pH 10, stir for 20 minutes, continue to add acid to pH 3, heat to 60°C, add ammonia water, adjust pH to 10, heat up to 100°C and age for 5 hours, add acid to pH after aging 3. Aging for 1 hour, filtering and washing with deionized water for 3 times, drying and pulverizing to obtain the finished product.

[0050] The preparation method of the wax emulsion is as follows: Take 500g of oxidized polyethylene wax, 25g of fatty alcohol polyoxyethylene ether and 25g of nonylphenol polyoxyethylene ether into a reaction kettle with a heating and stirring device, and heat the resulting mixture to 120°C. After melting, continue to stir for 1 hour. At the same time, add 10L of water to another reaction kettle and ...

Embodiment 2

[0052]Into 1000ml of sodium silicate solution with a concentration of 1.5M, inject 200g of the wax emulsion in Example 1 with a concentration of 5wt%, then add the sodium silicate solution into a reaction kettle with a stirring device, and the temperature is 20°C , add dilute sulfuric acid with a concentration of 20wt% to pH 10 under constant stirring, continue to add acid to pH 4 after stirring for 20 minutes, add ammonia water after heating to 65°C, adjust the pH value to 10, heat up to 100°C and age for 2 hours, after aging Add acid to pH 3, age for 1 hour, filter and wash 3 times with deionized water, dry and pulverize to obtain the finished product.

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Abstract

The invention relates to silicon dioxide, a preparation method thereof and an application of the silicon dioxide to the paint. The paint obtained by adopting a flatting agent has the advantages of high flattering efficiency, good transparency, good keeping property, slippery tactility, and the like. The silicon dioxide is characterized in that the pore volume is between 0.5 and 2.0 cm<3> / g; BET is between 100 and 380<2> / g; DBP absorption value is between 200 and 350g / 100g, d50 is between 4 and 15 microns, and 100*Rho*pore volume / DBP absorption value is greater than or equal to 0.50, wherein the meaning of each symbol is stated in the Description.

Description

technical field [0001] The present invention relates to a silicon dioxide, its preparation method and its application in paint. Background technique [0002] Silica has long been used in paints as a matting agent. Conventional methods for preparing silica for matting agents mainly include precipitation method and gel method (see DE 2414478, US 6103004 and JP-A-8-170030). In addition, on the basis of the gel method, US 60129007 and CN02822370, etc. provide a silica matting agent coated with wax to improve the performance of the matting agent, which adopts the method of co-crushing polyethylene wax, Polymers such as paraffin wax are compounded on silica, however, this process is inefficient for silica wax coating and requires heated air, thus increasing the cost. In addition, CN 1418811A and CN 1644632A propose to first make the wax that can be used for wax coating into a hydrophilic emulsion, add this emulsion to the generated silica slurry, mix it in the water medium and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C09D7/12
Inventor 李宝德郑连营操应军张忆靳桂茵樊新华裴亚利
Owner 北京航天赛德科技发展有限公司
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