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Glass mat gypsum board and preparation method thereof

A technology for gypsum board and thin felt, which is applied to building components, buildings, building materials, etc., can solve the problems of not proposing process parameters and preparation methods, the overall strength of the board is not greatly improved, and the gypsum board is easy to absorb moisture and mildew. Achieve the effect of improving breaking load and nail holding force, improving mechanical properties and application range, and shortening drying time

Inactive Publication Date: 2021-02-23
CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But at present, most of the gypsum boards use paper as the veneer, and the gypsum face paper provides 70-80% of the strength. However, due to the characteristics of the paper itself and the effect of the starch adhesive in the board core, the gypsum board is easy to absorb. Moisture is prone to mildew, the board is easily deformed by moisture, the water resistance effect is poor, and the strength drops seriously; and the air permeability of the protective paper itself is poor, and the energy consumption is high during the drying process, which affects production efficiency
[0004] Therefore, it is necessary to study a glass felt gypsum board to replace the paper gypsum board. Because the glass felt has excellent fireproof, waterproof and mildew resistance properties, the glass felt gypsum board has better waterproof, fireproof and mildew resistance than the paper gypsum board. There has been a certain improvement in performance, but the current production of glass thin felt gypsum boards has not proposed suitable process parameters and preparation methods, and the overall strength of the boards has not improved much. "Plate" (publication number: CN108166695A), the strength of gypsum board has been improved by 10-25%, so it is necessary to develop a kind of glass thin felt high-strength waterproof gypsum board, so that the gypsum board has high strength, good toughness, waterproof, fireproof, and mildew resistance. Features, the board has little deformation when exposed to moisture and strong weather resistance, and can be used in humid environments and building exterior walls

Method used

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  • Glass mat gypsum board and preparation method thereof
  • Glass mat gypsum board and preparation method thereof

Examples

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preparation example Construction

[0050] In the embodiment of the present application, optionally, the preparation method of the silicone modified emulsion includes the following steps:

[0051] 1) Dissolve the emulsifier in water, and mix it evenly with the silicone and the emulsion (stir vigorously for 20-40min,) to obtain a pre-emulsion; the quality of the emulsifier, the water, the silicone and the emulsion The ratio is (1 to 4):(40 to 80):(1 to 5):(30 to 40);

[0052] 2) Take (1-50) wt.% of the pre-emulsion described in step 1) and (1-50) wt.% of the initiator, mix evenly and heat up;

[0053] 3) Slowly add the rest of the pre-emulsion and the initiator, and keep warm to maintain the reaction;

[0054] 4) cooling the mixture obtained after the reaction in step 3) to 30°C to 40°C, and adjusting the pH value to 7-10 to obtain the modified emulsion;

[0055] In the embodiment of the present application, optionally, the organosilicon is selected from vinyltriethoxysilane, vinyltrimethoxysilane, octamethylcy...

Embodiment 1

[0067] This embodiment provides a kind of glass thin felt high-strength waterproof gypsum board, and described gypsum board comprises the following components: 100 parts by weight of gypsum powder, 0.1 part by weight of anionic surfactant sodium dodecylbenzene sulfonate, 0.2 part by weight of formazan Base cellulose ether, 0.2 weight part chopped glass fiber, 0.5 weight part modified emulsion, 0.1 weight part antifungal agent dichlorophen, 0.4 weight part polycarboxylate water reducer, 67 weight part water.

[0068] In the embodiment of the present application, the modified emulsion is a silicone acrylic emulsion.

[0069] The specific surface area of ​​the gypsum clinker is 257m 2 / kg, the particle size is 43 μm, and the specific surface area is Blaine’s specific surface area. The density of described glass felt is 280g / m 2 , the thickness is 0.5mm. The chopped glass fibers have a diameter of 15 μm and a length of 7 mm.

[0070] The silicone acrylic emulsion was purchased...

Embodiment 2

[0077] This embodiment provides a glass thin felt high-strength waterproof gypsum board, the gypsum board includes the following components: 100 parts by weight of gypsum powder, 0.4 parts by weight of anionic surfactant sodium lauryl sulfate, and 0.8 parts by weight of cellulose ether Hydroxypropyl methylcellulose, 0.4 parts by weight of chopped glass fibers, 1.5 parts by weight of modified emulsion, 0.2 parts by weight of antifungal agent, 0.6 parts by weight of water reducer, and 73 parts by weight of water.

[0078] In the embodiment of the present application, the modified emulsion is a silicone-modified acrylate emulsion.

[0079] The preparation method of organosilicon modified acrylate emulsion comprises the steps:

[0080] 1) Dissolve octylphenol polyoxyethylene ether OP-10 in water, and mix it with vinyltriethoxysilane and acrylate emulsion to obtain a pre-emulsion; the emulsifier, the water, the organic The mass ratio of silicon and the emulsion is 1:40:1:30;

[0...

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Abstract

The invention discloses a glass mat gypsum board. The glass mat gypsum board comprises a board core and a glass mat, wherein the glass mat wraps the board core; the board core is prepared from a gypsum clinker, an anionic surfactant, cellulose ether, chopped glass fibers, a modified emulsion, a mildew preventive, a water reducing agent and water; and in the preparation process of the glass mat gypsum board, the chopped glass fibers are uniformly mixed with the anionic surfactant, the cellulose ether and the water at first. The gypsum board provided by the invention does not need starch as an adhesive, so the possibility of mildew of the gypsum board is greatly reduced. A glass fiber mat is good in air permeability, so moisture is more volatile in the drying process, drying time in the production process of the board is shortened, energy consumption is reduced, and production efficiency is improved. In addition, the gypsum board is high in strength, good in toughness, resistant to water, fire and mildew, small in damp deformation and high in weather resistance, and can be used in a humid environment and a building outer wall.

Description

technical field [0001] The present invention relates to but not limited to the technical field of building materials, in particular to but not limited to a glass felt gypsum board and a preparation method thereof. Background technique [0002] Gypsum board is mainly made of gypsum. It is a building material with light weight, convenient processing, sound insulation, heat insulation and fire resistance. It has been widely used in partition walls and ceilings of various buildings such as residences, office buildings, and hotels. . [0003] But at present, most of the gypsum boards use paper as the veneer, and the gypsum face paper provides 70-80% of the strength. However, due to the characteristics of the paper itself and the effect of the starch adhesive in the board core, the gypsum board is easy to absorb. Moisture is prone to mildew, the board is easily deformed by moisture, the water resistance effect is poor, and the strength drops seriously; and the air permeability of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14E04C2/04C04B111/20C04B111/27C04B111/28
CPCC04B28/14E04C2/049C04B2111/27C04B2111/28C04B2111/2092C04B2103/40C04B24/383C04B14/42C04B24/24C04B2103/67C04B2103/302
Inventor 刘文君杨正波陈红霞葛俊巧张晓菲冉秀云
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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