Preparation method of anti-cracking type waterproof gypsum board

A technology for gypsum boards and preparation steps, which is applied in the field of preparation of crack-resistant waterproof gypsum boards, which can solve the problems of poor moisture resistance and easy cracking of gypsum boards, and achieve the effects of enhancing mechanical properties, improving crack resistance, and improving bonding strength

Inactive Publication Date: 2018-01-12
郭迎庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for preparing a crack-resistant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] Weigh 80g of wollastonite, grind and pulverize for 10 minutes, pass through a 100-mesh sieve, collect the sieved powder, put the sieved powder into a kiln at 1000°C for 1 hour to obtain a molten liquid, remove the bubbles, and transport it to the porous drain plate , The spinning is drawn at a speed of 2400r / min to obtain the homemade wollastonite fiber precursor, and the homemade wollastonite fiber precursor and polyethylene glycol stearate are mixed and placed in a mixer at a mass ratio of 4:1. After stirring at 45°C for 1 hour, modified wollastonite fibers were obtained. Weigh 18g corn starch, add 80mL deionized water to the corn starch, mix and stir at 65°C for 1 hour, and obtain a starch paste after stirring. Cool to 30°C, adjust the pH to 4 with 3% hydrochloric acid in mass fraction to obtain a starch mixture, then add 4g of isoamylase to the starch mixture and enzymatically hydrolyze at 25°C for 35 minutes. After the enzymatic hydrolysis is comple...

Example Embodiment

[0026] Example 2

[0027] Weigh 90g of wollastonite, grind and grind for 11 minutes, pass through a 100-mesh sieve, collect the sieved powder, put the sieved powder into a kiln at 1100°C for 2h to obtain a molten liquid, remove the bubbles, and transport it to the porous drain plate , The spinning is drawn at a speed of 3000r / min to obtain the homemade wollastonite fiber precursor, and the homemade wollastonite fiber precursor and polyethylene glycol stearate are mixed and placed in the mixer at a mass ratio of 4:1. After stirring for 1.5 hours at 55°C, modified wollastonite fiber was obtained. Weigh 25g corn starch, add 90mL deionized water to the corn starch, mix and stir at 70°C for 1.5 hours, and obtain a starch paste after stirring. Cool the paste to 40℃, adjust the pH to 5 with mass fraction of 3% hydrochloric acid to obtain a starch mixture, then add 5g of isoamylase to the starch mixture and enzymatically hydrolyze at 30℃ for 45 minutes, filter to remove the residue after...

Example Embodiment

[0028] Example 3

[0029] Weigh 100g of wollastonite, grind and pulverize for 12 minutes, pass through a 100-mesh sieve, collect the sieved powder, put the sieved powder into a 1200℃ kiln and melt for 3 hours to obtain a molten liquid, remove bubbles, and transport it to the perforated drain plate , The spinning is drawn at a speed of 3200r / min to obtain the homemade wollastonite fiber precursor. The homemade wollastonite fiber precursor and polyethylene glycol stearate are mixed and placed in a mixer at a mass ratio of 4:1. After stirring for 2 hours at 65°C, modified wollastonite fiber is obtained. Weigh 30g corn starch, add 100mL deionized water to the corn starch, mix and stir at 85°C for 2 hours, and obtain a starch paste after stirring. Cool to 45°C, adjust the pH to 6 with 3% hydrochloric acid by mass fraction to obtain a starch mixture, then add 6g isoamylase to the starch mixture and enzymatically hydrolyze at 35°C for 60 minutes. After the enzymatic hydrolysis is comple...

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PUM

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Abstract

The invention discloses a preparation method of anti-cracking type waterproof gypsum board, and belongs to the technical field of preparation of boards. The preparation method is characterized in thatpolyethylene glycol stearate is used for modifying self-prepared wollastonite raw fibers, the wollastonite is drawn into wollastonite with a fiber-shaped structure, the starch is subject to double modifying by epichlorohydrin and succinic anhydride when the wollastonite is stirred and added into a gypsum matrix, a board core and a board body form an interface with certain strength, and the hydrophobicity of the starch is realized by hydroxyl substitution in the etherification process; because the crosslinking density in the starch structure is increased, the absorbing of water is also limitedby crosslinking treatment; montmorillonoid and fly ash are added into the gypsum powder, a water-resistant hydration product is generated in the gypsum hydration process, the porosity of the gypsum powder is reduced, and the hole diameter is reduced; paraffin and polyethylene glycol are added, the paraffin is emulsified and then uniformly mixed with a gypsum frame, waterproof agents of sodium trimethylsilanolate and calcium oxalate are coated to the surface of the self-prepared gypsum board blank, and then the waterproof property of the gypsum board is further improved.

Description

technical field [0001] The invention discloses a preparation method of a crack-resistant waterproof gypsum board, which belongs to the technical field of board preparation. Background technique [0002] Waterproof gypsum board refers to this kind of stone board. When it is tested for waterproofing according to the American ASTM standard, its water absorption rate is 5%, that is, it can be used in areas with high humidity, such as toilets, bathrooms and kitchens. The board is made of gypsum A certain amount of waterproof agent is added to the core material to make the gypsum itself have a certain waterproof performance. In addition, gypsum board paper is also treated with waterproofing, so this is a better board with a wider range of uses. However, this board should not be directly exposed to a humid environment, nor should it be immersed in water for a long time. [0003] There are three types of gypsum boards in China: paper gypsum boards, fiber gypsum boards and hollow g...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B41/64C04B24/38C04B20/02C04B14/46
Inventor 郭迎庆杨立军陈莉莉
Owner 郭迎庆
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