Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of preparing silicon dioxide delustrant by large pore volume gel

A technology of silica and gel method, which is applied in the treatment of silica, silica, dyed polymer organic compounds, etc., can solve the problems of easily destroyed structure, wide pore size distribution, small specific surface area, etc., and achieve transparency High, anti-sedimentation improvement, good dispersion performance

Active Publication Date: 2009-04-15
通化双龙化工股份有限公司
View PDF1 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of this method are high oil absorption value, relatively simple process conditions, and low cost. The disadvantages are that the structure is poor, the structure is easily destroyed under high shear, the specific surface area is small, the pore volume ratio is small, the pore size distribution is wide, and the transparency is poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of silica matting agent with large pore volume gel method: in a 500L reactor with stirring, add 250L of sodium silicate, the density of the aqueous solution is 1.100g / ml), the temperature is 26°C, and under the state of stirring, the 130L / hour Add sulfuric acid with a concentration of 30% to the reactor until a gel is formed in the reactor, stop adding acid, then stir for 15 minutes, and at the same time, raise the temperature of the material in the reactor to 50°C, and continue to add sulfuric acid to the reactor at 340 L / hour. Until the pH value reaches 3, stir for 20 minutes, raise the temperature to 98 degrees, age for 1 hour, add water to cool to 75 degrees, use a chamber filter to filter and wash, until the conductivity of the filtrate reaches 200-250us / cm, the filtrate is passed through After slurrying, it is dried with a high-speed centrifugal spray dryer, and the water content of the product is below 5%, and it is graded and pulverized wit...

Embodiment 2

[0038] The difference from Example 1 is that after the second step of acid addition, sodium hydroxide with an active agent concentration of 30% is slowly added to the reactor to adjust the pH value to 6, and then ammonia water is added to adjust the pH value to 9.

Embodiment 3

[0040] Different from Example 2, only add 30% sodium hydroxide to adjust the pH value from 3 to 9.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
particle sizeaaaaaaaaaa
modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a silicon dioxide flatting agent used for coating flatting with a large pore volume gelatin method, which comprises the following steps of: adding a sodium silicate water solution in a reaction kettle; at the temperature of 26 DEG C and under stirring, adding 30% sulphuric acid until forming gelatin in the kettle; then stirring for 15min, raising the temperature to 50 DEG C and continually adding the sulphuric acid until pH value being up to 3; when no gelatin block by stirring, slowly adding 30% sodium hydroxide into the reaction kettle, regulating the pH value to be 5-6, and then regulating the pH value to be 9-10 by using ammonia water; and raising the temperature to 98 DEG C, ageing for 1 hour, adding water for cooling to the temperature of 75 DEG C, filtration washing, slurrying, sponging drying and crashing classifying to obtain the finished product. The product has the characteristics of large pore volume, large specific surface area, high purity, moderate DBP absorption value, good dispersion performance, high transparency and the like as well as the advantages of reasonable technology and high production efficiency. The product can be added with wax for carrying out surface treatment, thus leading the surface paint film of the coating to be smooth, and improving scratch resistance and precipitate resistance.

Description

technical field [0001] The invention belongs to the preparation technology of powder materials, and in particular relates to a preparation method of a large-pore-volume gel method silica matting agent used for coating matting. Background technique [0002] Matting is an important means for controlling the gloss of decorative coatings. Different objects to be coated have different requirements for the gloss performance of the coated surface in addition to the protection and color requirements due to their different use purposes and environments. Soft light is required, military equipment and facilities are for concealment, confidentiality and security purposes, and some instrument components have special requirements for light performance. The surface coating is semi-gloss or even dull, which requires filling in the coating. Add matting agent. [0003] There are many types of matting agents, such as light calcium carbonate talcum powder and other functional pigments. This ty...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C09C1/28C09C3/10
Inventor 卢忠奎白英杰辛大成高焕武杜崇恩
Owner 通化双龙化工股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com