Waterproof gypsum board core, preparation method thereof and waterproof gypsum board

A gypsum board and board core technology, which is applied in the field of gypsum board materials, can solve the problems of reduced adhesive force of gypsum board, reduction of gypsum board's own advantages, changes in strength and weight of gypsum board, and achieve the effect of improving hydrophobic performance

Active Publication Date: 2020-05-12
肇庆北新建材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) Spray waterproofing agent or add waterproof finish to the surface of gypsum board. However, this method not only has high requirements for construction, but also once defects appear on the surface of gypsum board and the sprayed waterproofing agent or waterproof finish is damaged, the waterproof effect will be great. discount;
[0006] 2) Doping inorganic gelling materials into gypsum boards. However, the essence of this method is that water-resistant hydration products are generated during the hydration process of gypsum, which makes gypsum change from a single crystal structure to a crystal gel structure, which will cause gypsum boards The density increases, and becau

Method used

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  • Waterproof gypsum board core, preparation method thereof and waterproof gypsum board
  • Waterproof gypsum board core, preparation method thereof and waterproof gypsum board
  • Waterproof gypsum board core, preparation method thereof and waterproof gypsum board

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preparation example Construction

[0051] S101. Preparation of active starch: add water to the starch and mix, then gelatinize at a temperature of 90-100°C to obtain starch paste; put the starch paste in a ball mill and dry to obtain active starch;

[0052] S102. Preparation of hydrophobic starch: after spraying dodecenyl succinic anhydride on the obtained active starch, adding hydrochloric acid, stirring and mixing at a pressure of 2 to 3 atmospheres, and continuously feeding steam, drying, Obtain hydrophobic starch. The specific preparation flow chart is as figure 2 shown. The contact area between the dodecenyl succinic anhydride and the active starch is increased by spraying the dodecenyl succinic anhydride on the activated active starch, and the grafting efficiency is improved. At the same time, the use of dodecenyl succinic anhydride can increase the length of the long chain after grafting, and more effectively improve the formation of the needle-like structure in the later stage.

[0053] In a further...

Embodiment 1

[0074] Stir and mix 100 parts by weight of plaster powder, 30 parts by weight of water, hydrophilic starch and 0.05 parts by weight of glass fiber to obtain a prefabricated slurry;

[0075] Add 0.07 parts by weight of foaming agent, 0.5 parts by weight of coagulation accelerator, hydrophobic starch and 45 parts by weight of water to the obtained prefabricated slurry, stir and mix them, and then mold them to obtain waterproof gypsum board core A1. (wherein, the total amount of hydrophilic starch and hydrophobic starch is 0.1 parts by weight, and the weight ratio of hydrophobic starch and hydrophilic starch is 1:0.8)

Embodiment 2

[0077] Stir and mix 100 parts by weight of Paris plaster, 40 parts by weight of water, hydrophilic starch and 0.15 parts by weight of glass fiber to obtain a prefabricated slurry;

[0078] Add 0.15 parts by weight of foaming agent, 2 parts by weight of coagulation accelerator, hydrophobic starch and 45 parts by weight of water to the obtained prefabricated slurry, stir and mix them, and then mold them to obtain waterproof gypsum board core A2. (wherein the total amount of hydrophilic starch and hydrophobic starch is 4 parts by weight, and the weight ratio of hydrophobic starch and hydrophilic starch is 1:1.2)

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Abstract

The embodiment of the invention discloses a waterproof gypsum board core, a preparation method thereof and a waterproof gypsum board. The waterproof gypsum board core comprises calcined gypsum powder,starch, glass fibers, water and a processing aid, wherein the starch comprises hydrophobic starch and hydrophilic starch. The waterproof gypsum board comprises a waterproof gypsum board core and surface protection paper. By adopting a mode of compounding the hydrophobic starch and the hydrophilic starch, effective bonding among inorganic components in the gypsum board is guaranteed, and the surface protection paper attached to the surface can be effectively bonded, the density of the surface protection paper is not increased; meanwhile, the coverage of hydrophobic groups on the surface of thegypsum board can be enhanced, so that the water absorption performance of the gypsum board is effectively reduced, and the water resistance of the gypsum board is improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of gypsum board materials, in particular to a waterproof gypsum board core, a preparation method thereof, and a waterproof gypsum board. Background technique [0002] Gypsum board has become a widely used decorative material because of its light weight, high strength, good sound insulation, heat insulation and fire resistance. It is widely used in various buildings such as residences, office buildings, shops, hotels and industrial plants. Inner partition walls, ceilings, sound-absorbing panels, ground-based panels and various decorative panels, etc. [0003] However, due to the factors of the gypsum board material (especially the gypsum board core), it is easy to absorb water and get damp, and once it absorbs water and gets damp, its strength will be significantly reduced, and problems such as warping and deformation will easily occur, especially when the humidity is relatively high. In the ...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B38/00C04B24/38C04B111/27
CPCC04B28/147C04B24/38C04B2111/27C04B2111/0062C04B14/42C04B2103/12C04B2103/42C04B38/00
Inventor 龙作健徐伟
Owner 肇庆北新建材有限公司
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