Surface modification enhanced gypsum powder as well as preparation method and application thereof

A surface modification and gypsum powder technology, which is applied in the field of gypsum powder, can solve the problems of low flexural strength and limit the application of gypsum powder, and achieve excellent comprehensive performance, short initial setting and setting time, and high strength.

Active Publication Date: 2022-01-18
客诺环保科技(青岛)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the defect of low flexural strength of existing gypsum powder limits the application of gypsum powder

Method used

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  • Surface modification enhanced gypsum powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A surface-modified and enhanced gypsum powder, taking 100kg of α-gypsum as an example, the raw materials used and their quality are as follows:

[0023] α-gypsum 100kg

[0024] Fine sand 35kg

[0025] Redispersible latex powder 2kg

[0026] Cellulose ether 3kg

[0027] Coupling agent 3kg

[0028] Water reducer 0.3kg

[0029] Retarder 0.6kg

[0030] Enhancer 0.5kg;

[0031] In this embodiment, the particle size range of the fine sand is 0.6-0.8 mm; the redispersible latex powder is a copolymer of vinyl acetate and ethylene, prepared by the following method: vinyl acetate and ethylene monomer Under the action of polyvinyl alcohol as a protective glue, the mother emulsion is obtained by emulsion polymerization, and then spray-dried; the cellulose ether is carboxymethyl cellulose ether; the coupling agent is a titanate coupling agent The water-reducing agent adopts polycarboxylate water-reducer, and the water-reducing rate of the polycarboxylate water-reducer is 25%;...

Embodiment 2

[0034] A surface-modified and enhanced gypsum powder, taking 100kg of α-gypsum as an example, the raw materials used and their quality are as follows:

[0035] α-gypsum 100kg

[0036] Fine sand 40kg

[0037] Redispersible latex powder 3kg

[0038] Cellulose ether 1kg

[0039] Coupling agent 2kg

[0040] Water reducer 0.1kg

[0041] Retarder 0.3kg

[0042] Enhancer 0.4kg;

[0043] In this embodiment, the particle size range of the fine sand is 0.6-0.8 mm; the redispersible latex powder is a copolymer of vinyl acetate and ethylene, prepared by the following method: vinyl acetate and ethylene monomer Under the action of polyvinyl alcohol as a protective glue, the mother emulsion is obtained by emulsion polymerization, and then spray-dried; the cellulose ether is ethyl cellulose sulfonate; the coupling agent is titanate coupling agent; the water reducer adopts polycarboxylate water reducer, and the water reducing rate of the polycarboxylate water reducer is 25%; the retarde...

Embodiment 3

[0046] A surface-modified and enhanced gypsum powder, taking 100kg of α-gypsum as an example, the raw materials used and their quality are as follows:

[0047] α-gypsum 100kg

[0048] Fine sand 38kg

[0049] Redispersible latex powder 2kg

[0050] Cellulose ether 2kg

[0051] Coupling agent 4kg

[0052] Water reducer 0.2kg

[0053] Retarder 0.9kg

[0054] Enhancer 0.2kg;

[0055] In this implementation, the particle size range of the fine sand is 0.6-0.8 mm; the redispersible latex powder is a copolymer of vinyl acetate and ethylene, prepared by the following method: vinyl acetate and ethylene monomer Under the action of polyvinyl alcohol as a protective glue, the mother emulsion is obtained by emulsion polymerization, and then spray-dried; the cellulose ether is hydroxypropyl methyl cellulose ether; the coupling agent is titanate coupling agent; the water-reducing agent adopts polycarboxylate water-reducer, and the water-reducing rate of the polycarboxylate water-reducer...

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Abstract

The invention discloses surface modification enhanced gypsum powder which is mainly prepared from the following raw materials in parts by weight: 100 parts of alpha-gypsum, 35-40 parts of fine sand, 2-3 parts of redispersible latex powder, 1-3 parts of cellulose ether, 2-4 parts of a coupling agent, 0.1-0.3 part of a water reducing agent, 0.3-0.9 part of a retarder and 0.2-0.5 part of an enhancer. Preferably, the redispersible latex powder is a copolymer of vinyl acetate and ethylene, and is prepared by the steps of carrying out emulsion polymerization on vinyl acetate and ethylene monomers under the action of polyvinyl alcohol serving as protective glue to obtain a parent emulsion, and then carrying out spray drying to obtain the redispersible latex powder. Preferably, the cellulose ether is any one of carboxymethyl cellulose ether, sulfonic acid ethyl cellulose ether, carboxymethyl hydroxyethyl cellulose ether, methyl cellulose ether, hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and the like. The surface modification enhanced gypsum powder provided by the invention has the advantages of short initial setting and setting time and high strength.

Description

technical field [0001] The invention relates to the field of gypsum powder, in particular to a surface-modified and enhanced gypsum powder and a preparation method and application thereof. Background technique [0002] Gypsum powder is usually white and colorless. It is one of the five major gel materials. It occupies an important position in the national economy and is widely used in construction, building materials, industrial molds and art models, chemical industry and agriculture, food processing and medical beauty, etc. It is an important industrial raw material in many fields of application. With the rapid development of gypsum products, stucco gypsum products are suitable for plastering interior walls and ceilings of industrial and civil buildings due to their excellent construction performance and good adhesion, and become an ideal substitute for cement mortar and mixed mortar. The main component of α-gypsum is calcium sulfate hemihydrate (CaSO 4 ), which is a kind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B24/38C04B24/40C04B24/26
CPCC04B28/146C04B24/383C04B24/40C04B24/2623C04B2111/00482C04B2201/50C04B14/06C04B2103/302C04B2103/22C04B7/02
Inventor 牛准裕
Owner 客诺环保科技(青岛)有限公司
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