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Gypsum-based putty

A gypsum-based, putty technology, applied in filling slurry and other directions, can solve the problems of poor water resistance, powder falling, peeling and peeling, rust, etc., to improve mechanical properties and water resistance, excellent adhesion, and a wide range of sources Effect

Inactive Publication Date: 2018-04-20
北京宝辰联合科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, PVA glue putty and gypsum-based putty have poor water resistance; while cement-based putty has good bond strength and water resistance, but relatively poor crack resistance; gray calcium-based putty has moderate bond strength and water resistance between Between gypsum-based putty and cement-based putty, but the alkalinity is too strong, which will make the builder feel burning, and may also decompose the color paste of the latex paint on the surface, resulting in uneven color
[0003] As an industrial by-product, building gypsum is widely used in the field of building materials. It has the characteristics of good crack resistance, smooth and delicate texture, and good thermal insulation. However, there are some problems, such as poor water resistance and weak acidity, which make it Its field of application is limited
When gypsum is applied to putty, it is very easy to lose powder, peel and peel off under humid conditions of use. At the same time, gypsum putty is prone to rust after contact with steel products (such as iron pipes)

Method used

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  • Gypsum-based putty

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of gypsum-based putty, comprising the following components by mass: 40 parts of β-type hemihydrate gypsum, gray calcium (the number of mesh is 400 mesh, Ca(OH) 2 Content ≥ 90%) 3 parts, silica fume (specific surface area ≥ 20000m 2 / kg) 2 parts, slag (specific surface area is 400m 2 / kg) 3 parts, heavy calcium (particle size: 400 mesh) 50 parts, acrylate copolymer (glass transition temperature -4 ℃) 0.8 parts, cellulose ether (viscosity 100000mPa.s) 0.3 parts, starch ether 0.03 parts , 0.3 part of wood fiber, 0.5 part of hydrophobic agent, 0.1 part of retarder. Mix the above components evenly to prepare the gypsum-based putty.

Embodiment 2

[0031] A kind of gypsum-based putty, comprising the following components by mass: 30 parts of β-type hemihydrate gypsum, gray calcium (the number of mesh is 450 mesh, Ca(OH) 2 Content ≥ 90%) 3 parts, silica fume (specific surface area ≥ 20000m 2 / kg) 2 parts, slag (specific surface area is 450m 2 / kg) 3 parts, heavy calcium (particle size: 500 mesh) 60 parts, acrylate copolymer (glass transition temperature -5 ℃) 1.5 parts, cellulose ether (viscosity 100000mPa.s) 0.3 parts, starch ether 0.03 parts , 0.2 part of wood fiber, 0.1 part of hydrophobic agent, 0.06 part of retarder. Mix the above components evenly to prepare the gypsum-based putty.

Embodiment 3

[0033] A kind of gypsum base putty, comprises the component of following mass parts: 32 parts of beta type hemihydrate gypsum, gray calcium (the mesh number is 450 orders, Ca(OH) 2 Content ≥ 90%) 7 parts, silica fume (specific surface area ≥ 20000m 2 / kg) 3 parts, slag (specific surface area is 450m 2 / kg) 5 parts, heavy calcium (particle size: 500 mesh) 51 parts, acrylate copolymer (glass transition temperature -4 ℃) 0.8 parts, cellulose ether (viscosity 40000mPa.s) 0.4 parts, starch ether 0.05 parts , 0.5 part of wood fiber, 0.4 part of hydrophobic agent, 0.07 part of retarder. Mix the above components evenly to prepare the gypsum-based putty.

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Abstract

The invention discloses gypsum-based putty. The gypsum-based putty comprises the following components in parts by mass: 30-40 parts of beta-type hemihydrate gypsum, 3-7 parts of ash calcium, 2-3 partsof silica fume, 3-5 parts of mineral slag, 50-60 parts of triple superphosphate, 0.8-1.5 parts of redispersible latex powder, 0.3-0.4 part of cellulose ether, 0.03-0.05 part of starch ether, 0.2-0.5part of wood fiber, 0.1-0.5 part of a hydrophobic agent and 0.06-0.1 part of a retarder. The gypsum-based putty uses the beta-type hemihydrate gypsum as a main cementing material and uses the ash calcium, mineral slag and the silica fume as auxiliary cementing materials, and the components react with one another so as to improve the mechanical properties and the water resistance of the cementing system; the gypsum-based putty has excellent adhesion, water resistance and flexibility, and raw materials are wide in sources and low in cost; the 7d bonding strength of the gypsum-based putty reaches0.9MPa, and the flooding bonding strength thereof reaches 0.4MPa or above.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a gypsum-based putty. Background technique [0002] Putty is a kind of decorative material for leveling the surface of the wall. It is a kind of thick paste paint. It is an indispensable product before the paint is painted. It is usually applied on the primer or directly on the object to remove Uneven defects on the surface of the coating. Putty is divided into two types: exterior wall putty and interior wall putty. The physical index requirements of exterior wall putty are higher than that of interior wall putty. Generally, its water resistance and anti-aging are required to achieve the same service life as the building, and it is crack-resistant and anti-crack. 2. The adhesion should be strong to resist the invasion of wind and sun in nature. Common putties can be divided into PVA glue putty, gypsum-based putty, lime-calcium-based putty and cement-based...

Claims

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Application Information

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IPC IPC(8): C09D5/34
CPCC09D5/34
Inventor 张淑欣
Owner 北京宝辰联合科技股份有限公司
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