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Formula of gypsum binder

A binder and formula technology, applied in the field of gypsum binder formulation, can solve problems such as labor-intensive, time-consuming, and prone to cracking

Inactive Publication Date: 2010-06-16
河南省翔宇建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the joints between the existing gypsum slats are bonded with gauze coated with glue. This bonding method is labor-intensive and time-consuming, and it is prone to cracking if it expands slightly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0005] 100 parts of desulfurized gypsum; 0.01 part of polyvinyl alcohol; 0.1 part of methyl cellulose; 0.01 part of citric acid;

[0006] The test report is as follows: initial setting time: 30min

[0007] Final setting time: 45min

[0008] Flexural strength: 2.3MPa

[0009] Compressive strength: 5.5MPa

[0010] Bonding (compression shear) strength: 0.40MPa

Embodiment 2

[0012] 100 parts of desulfurized gypsum; 5 parts of polyvinyl alcohol; 0.7 parts of methyl cellulose; 0.2 parts of citric acid;

[0013] The test report is as follows: initial setting time: 100min

[0014] Final setting time: 115min

[0015] Flexural strength: 2.5MPa

[0016] Compressive strength: 6.5MPa

[0017] Bonding (compression shear) strength: 0.60MPa

Embodiment 3

[0019] 100 parts of desulfurized gypsum; 3 parts of polyvinyl alcohol; 0.3 parts of methyl cellulose; 0.1 part of citric acid;

[0020] The test report is as follows: initial setting time: 85min

[0021] Final setting time: 105min

[0022] Flexural strength: 2.90MPa

[0023] Compressive strength: 6.5MPa

[0024] Bonding (compression shear) strength: 0.9MPa

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Abstract

The invention discloses a formula of a gypsum binder. The gypsum binder comprises the following raw materials in parts by weight: 100 parts of desulfurized gypsum, 0-5 parts of polyvinyl alcohol, 0.1-0.7 part of methyl cellulose and 0-0.2 part of sodium citrate. The dry powder is evenly stirred and mixed to obtain the product. The test report indicates that the initial setting time is 30-100 minutes, the final setting time is 45-115 minutes, the folding strength is 2.3-2.9 MPa, the compression strength is 5.5-6.5 MPa, and the bonding (compression shear) strength is 0.40-0.9 MPa. The invention has the advantages of favorable stability, water retention and flow slide property, strong binding performance and favorable affinity, has the function of interfacial activity and greatly enhances the adhesive force between the product and the base material; and the invention has stable pH values, favorable lubricating property, favorable shrink resistance, favorable mildew resistance and the like, and does not need to use gauze at the seam, thereby having the advantages of firm binding and slight expansibility and preventing the phenomenon of cracking.

Description

Technical field: [0001] The invention relates to a formula of gypsum adhesive, which is especially suitable for bonding various gypsum boards and gypsum decorative art products. Background technique: [0002] Most of the joints between the existing gypsum slats are bonded with gauze coated with glue. This bonding method is labor-intensive, time-consuming, and a slight expansion is prone to cracking and the like. Invention content: [0003] The task of the present invention is to propose a formulation of a gypsum binder that is reliable in bonding, has good affinity, has interfacial activity, and greatly improves the adhesion between the product and the base material. The task of the present invention is accomplished like this, a kind of formula of gypsum binder, it is characterized in that: raw material deployment ratio by weight is: 100 parts of desulfurized gypsum, 0-5 part of polyvinyl alcohol, 0.1-0.7 part of methyl cellulose , 0-0.2 parts of sodium citrate, dry powde...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B24/38C04B24/04
Inventor 李耕伟
Owner 河南省翔宇建材科技有限公司
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