Preparation method of vermiculite-based flexible sealing material

A technology of flexible sealing and sealing materials, applied in the direction of coating, grain processing, etc., to achieve the effect of smooth surface, good flexibility and improved temperature resistance

Active Publication Date: 2020-01-24
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of tape casting for vermiculite-based flexible sealing materials.

Method used

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  • Preparation method of vermiculite-based flexible sealing material
  • Preparation method of vermiculite-based flexible sealing material
  • Preparation method of vermiculite-based flexible sealing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Raw material formula

[0039] High-temperature expanded vermiculite powder 500g, chemically expanded vermiculite powder 500g, dispersant vinyltriethoxysilane (A151) 15g, solvent toluene 1000g, binder nitrile rubber (NBR) 100g, plasticizer phthalate Butyl ester (DBP) 100g.

[0040] 2) Preparation process

[0041] Pretreatment: Process a): In a standard constant temperature and humidity curing box, the vermiculite-based powder is subjected to moisture absorption treatment, the relative humidity is controlled at 20%, and the treatment time is 2h; wherein the vermiculite-based powder is 500g of high-temperature expanded vermiculite powder It is mixed with 500g of chemically expanded vermiculite powder; the particle size distribution of high-temperature expanded vermiculite is D10=8.146μm, D50=27.50μm, D90=74.99μm, and the particle size distribution of chemically expanded vermiculite is D10=6.963μm, D50=32.34μm , D90=98.94μm;

[0042] Process b): Dry the treated vermic...

Embodiment 2

[0049] 1) Raw material formula

[0050] High-temperature expanded vermiculite powder 400g, chemically expanded vermiculite powder 400g, talc powder 200g, dispersant stearic acid 15g, solvent ethanol 1000g, binder polyvinyl butyral (PVB) 100g, plasticizer phthalate Butyl ester (DBP) 100g.

[0051] 2) Preparation process

[0052]Pretreatment: Process a): In a standard constant temperature and humidity curing box, the vermiculite-based powder is subjected to moisture absorption treatment, the relative humidity is controlled at 30%, and the treatment time is 2h; the vermiculite-based powder is 400g of high-temperature expanded vermiculite powder 1. Mix 400g of chemically expanded vermiculite powder and 200g of talc powder; the particle size distribution of high-temperature expanded vermiculite is D10=8.146 μm, D50=27.50 μm, D90=74.99 μm, and the particle size distribution of chemically expanded vermiculite is D10=6.963 μm, D50=32.34 μm, D90=98.94 μm, the particle size distributi...

Embodiment 3

[0060] 1) Raw material formula

[0061] High-temperature expanded vermiculite powder 250g, chemically expanded vermiculite powder 250g, talc powder 500g, dispersant fish oil 15g, solvent is 800g of methyl ethyl ketone / ethanol / cyclohexanone mixed system, wherein methyl ethyl ketone: ethanol: The mass ratio of cyclohexanone is 1:2:1, the binder polyvinyl butyral (PVB) is 100 g, and the plasticizer is dibutyl phthalate (DBP) 100 g.

[0062] 2) Preparation process

[0063] Pretreatment: Process a): In a standard constant temperature and humidity curing box, the vermiculite-based powder is subjected to moisture absorption treatment, the relative humidity is controlled at 30%, and the treatment time is 2h; the vermiculite-based powder is 250g of high-temperature expanded vermiculite powder 1. Mix 250g of chemically expanded vermiculite powder and 500g of talc powder; the particle size distribution of high-temperature expanded vermiculite is D10=8.146 μm, D50=27.50 μm, D90=74.99 μm,...

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Abstract

The invention provides a preparation method of a vermiculite-based flexible sealing material. The preparation method is characterized by comprising the following steps of step 1) putting dried vermiculite-based powder into a ball milling tank, adding a solvent and a dispersant, and performing primary ball-milling dispersion; step 2) after primary ball milling is finished, adding an adhesive and aplasticizer for performing secondary ball milling to obtain a mixed slurry; step 3) carrying out filtration treatment on the mixed slurry, and then carrying out defoaming treatment to obtain a shapedslurry; step 4) carrying out casting forming on the obtained shaped slurry, controlling the height from a scraper to a base belt to be 0.5-2 mm, controlling the speed of the base belt to be 0.2-2m/min, and controlling the drying temperature to be 25-60 DEG C to obtain a sealing material blank; and step 5) enabling the sealing material blank to be subjected to hot-pressing vulcanization molding, and then obtaining the vermiculite-based flexible sealing material through cutting and molding. The vermiculite-based flexible sealing material with excellent performance is obtained through casting molding and powder pretreatment.

Description

technical field [0001] The invention belongs to the field of sealing materials, in particular to a preparation method of a vermiculite-based flexible sealing material. Background technique [0002] As a traditional molding method for preparing thin sheet products, tape casting is widely used in various fields due to the advantages of uniform structure, smooth surface, high strength and good toughness of the obtained product. However, there is no report on the use of tape casting for vermiculite-based flexible sealing materials. At the same time, the quality of the powder itself will also affect the performance of the sealing material. Contents of the invention [0003] Based on the above existing situation, the present invention provides a preparation method of a vermiculite-based flexible sealing material, through tape casting and pretreatment, the sealing material can obtain good performance. [0004] The technical scheme adopted in the present invention is: [0005] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/02C04B26/04B02C25/00B29C41/52B29C67/24
CPCC04B26/02C04B26/04B29C67/242B02C25/00B29C41/52C04B2201/50C04B14/202C04B24/00C04B24/42C04B24/045C04B14/042C04B24/08C04B24/026C04B24/008
Inventor 钱玉鹏吴益民江学峰王飞胡善海孙利杰忻永伟
Owner WUHAN UNIV OF TECH
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