Preparation method of ultrafine needle-like wollastonite modified spherical silicon dioxide composite powder

A spherical silica, acicular wollastonite technology, applied in chemical instruments and methods, dyed low molecular organic compound treatment, fibrous fillers, etc. Easy precipitation and other problems to achieve the effect of improving powder dispersion and suspension, improving thermal conductivity, and improving overall performance

Inactive Publication Date: 2020-04-03
JIANGXI GUANGYUAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to disclose a kind of ultrafine needle potting agent in order to solve the shortcomings of poor dispersion, low bonding strength, low glue strength, easy precipitation of fillers and high production cost of epoxy potting adhesive prepared by traditional reinforcing agent and filler. Preparation method of wollastonite modified spherical silica composite powder

Method used

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  • Preparation method of ultrafine needle-like wollastonite modified spherical silicon dioxide composite powder
  • Preparation method of ultrafine needle-like wollastonite modified spherical silicon dioxide composite powder
  • Preparation method of ultrafine needle-like wollastonite modified spherical silicon dioxide composite powder

Examples

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Effect test

Embodiment 1

[0037] In this embodiment, a method for preparing ultrafine needle-shaped wollastonite modified spherical silica composite powder, the specific steps are as follows:

[0038] The high-quality acicular wollastonite raw ore and quartz raw ore are respectively self-cleaned, screened, crushed multiple times, dry-grinded, and classified and collected to obtain 400-mesh needle-shaped wollastonite powder and 600-mesh spherical quartz powder. The electron microscope photo of 400 mesh acicular wollastonite powder is as figure 1 Shown.

[0039] The obtained 400 mesh acicular wollastonite powder and water are prepared into a slurry with a solid content of 65-70%, and the first composite dispersant polyethylene glycol fatty acid sodium and lauryl sulfon are added during the slurry configuration process Sodium, the addition amount is 6‰ of the mass of wollastonite powder, in which the ratio of polyethylene glycol fatty acid sodium and sodium lauryl sulfonate is 1:4.

[0040] The obtained 600 mes...

Embodiment 2

[0044] In this example, a preparation method of superfine needle-shaped wollastonite modified spherical silica composite powder, the specific steps are as follows:

[0045] The high-quality acicular wollastonite raw ore and quartz raw ore are respectively self-cleaned, screened, crushed multiple times, dry-grinded, and classified and collected to obtain 400-mesh needle-shaped wollastonite powder and 600-mesh spherical quartz powder.

[0046] The obtained 400 mesh acicular wollastonite powder and water are prepared into a slurry with a solid content of 65-70%, and the first composite dispersant, sodium ethylene glycol fatty acid and dodecyl sulfonic acid are added during the slurry configuration process Sodium, the added amount is 7‰ of the mass of wollastonite powder, in which the ratio of polyethylene glycol fatty acid sodium and sodium lauryl sulfonate is 1:5.

[0047] The obtained 600 mesh quartz powder and water are prepared into a slurry with a solid content of 55-60%. The secon...

Embodiment 3

[0051] In this example, a preparation method of superfine needle-shaped wollastonite modified spherical silica composite powder, the specific steps are as follows:

[0052] The high-quality acicular wollastonite raw ore and quartz raw ore are respectively self-cleaned, screened, crushed multiple times, dry-grinded, and classified and collected to obtain 400-mesh needle-shaped wollastonite powder and 600-mesh spherical quartz powder.

[0053] The 400-mesh acicular wollastonite powder and water are prepared into a slurry with a solid content of 65-70%, and the first composite dispersant polyethylene glycol fatty acid sodium and lauryl sulfon are added during the slurry configuration process Sodium, the addition amount is 8‰ of the mass of wollastonite powder, in which the ratio of polyethylene glycol fatty acid sodium and sodium lauryl sulfonate is 1:6.

[0054] The obtained 600 mesh quartz powder and water are prepared into a slurry with a solid content of 55-60%. The second composite...

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Abstract

The invention relates to a preparation method of ultrafine needle-like wollastonite modified spherical silicon dioxide composite powder, wherein the method comprises the steps: treating high-quality needle-like wollastonite raw ore and quartzite raw ore to obtain needle-like wollastonite powder and spherical quartzite powder; adding a composite dispersing agent into the needle-like wollastonite powder and the spherical quartzite powder to prepare wollastonite powder slurry and quartzite powder slurry; and making the two slurries into a composite slurry, drying, depolymerizing and scattering, and carrying out surface modification by a composite modifier to obtain the special ultrafine needle-like wollastonite modified spherical silicon dioxide composite powder for an epoxy pouring sealant.The needle-like wollastonite powder and spherical silicon dioxide are subjected to superfine wet grinding, and then slurry compounding is carried out, so the problems of poor dispersity, low bonding strength, low adhesive strength and the like caused by single use of one kind of powder in the epoxy pouring sealant are avoided, the needle-like wollastonite powder and the spherical silicon dioxide are interspersed and accumulated in the pouring sealant, the dispersity and the suspension property of the powder are improved, the pouring sealant is compact in pouring, and the heat-conducting property of the sealant is improved.

Description

Technical field [0001] The invention relates to a preparation method of superfine needle-shaped wollastonite modified spherical silica composite powder, which belongs to the technical field of wollastonite powder preparation. Background technique [0002] Epoxy potting glue refers to a type of epoxy resin liquid encapsulation or potting material made with epoxy resin as the main ingredient, various functional additives, fillers, and appropriate curing agent, used for electronic components Bonding, sealing, potting and coating protection. Because of its superior performance of epoxy resin, epoxy resin potting glue is widely used in electronic components. The traditional reinforcing and fillers used in epoxy potting glue are mainly silica powder and α-Al 2 O 3 , Silica powder and α-Al 2 O Due to the small particle size of the product, the secondary particles agglomerate seriously, and the effect of crushing and depolymerization is not good. Blockage occurs in the extrusion of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/08C09C3/04
CPCC09C1/28C09C3/006C09C3/041C09C3/08
Inventor 温声平彭鹤松吴平飞陈敏杰邱文福罗雪峰
Owner JIANGXI GUANGYUAN CHEM
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