Desulfurization gypsum composition and preparation method, gypsum-based interior wall putty and application

A technology of interior wall putty and desulfurized gypsum, which is applied in the field of architectural coatings, can solve the problems of gypsum-based interior wall putty that cannot be used, is easily deformed by moisture, and has strong water absorption, and achieves excellent workability, fluidity, and water resistance and moisture resistance. Good, stable retarding time

Active Publication Date: 2022-05-24
ASIA PAINT SHANGHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a desulfurized gypsum composition to improve the technical problem that traditional gypsum materials have strong water absorption and are easily deformed by moisture, which leads to the inability of gypsum-based interior wall putty to be used in high-humidity environments

Method used

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  • Desulfurization gypsum composition and preparation method, gypsum-based interior wall putty and application
  • Desulfurization gypsum composition and preparation method, gypsum-based interior wall putty and application
  • Desulfurization gypsum composition and preparation method, gypsum-based interior wall putty and application

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preparation example Construction

[0038] In the preparation method of the desulfurized gypsum composition provided by the present invention, the moisture in the desulfurized gypsum powder is completely removed by calcination, and then aged in a closed space with a humidity of 20%-50%, so that the desulfurized gypsum powder is combined with the moisture in the air to form Different phases of desulfurized gypsum exist stably, thereby improving the stability of the desulfurized gypsum composition, inhibiting its hydrophilicity and absorption, improving water and moisture resistance, and helping to expand its application in high humidity environments. .

[0039] In addition, the preparation method of the desulfurized gypsum composition provided by the present invention is simple in process, convenient in operation, suitable for large-scale production, and improves production efficiency.

[0040] In a preferred solution of the present invention, when the desulfurized gypsum composition is prepared, when the desulfu...

Embodiment 1

[0097] The present embodiment provides a gypsum-based interior wall putty, including the following raw materials in parts by mass:

[0098]

[0099]

[0100] Among them, the composite retarder is composed of citric acid, borax and tartaric acid according to the mass ratio of 0.09:1:0.01; the composite rubber powder is composed of styrene-acrylic rubber powder and EVA rubber powder according to the mass ratio of 1:2 The desulfurized gypsum composition is prepared according to the following steps: after the desulfurized gypsum powder is calcined at 175 ° C for 90 minutes, air-selected and aged at a speed of 10 m / s by a high-speed fan, and then aged in a closed room with a humidity of 35% 14 days.

Embodiment 2

[0102] The present embodiment provides a gypsum-based interior wall putty, including the following raw materials in parts by mass:

[0103]

[0104] Wherein, the sulfur gypsum composition is prepared according to the following steps: after calcining the desulfurized gypsum powder at 180° C. for 110 min, air-selected and aged at a speed of 10 m / s by a high-speed fan, and then aged in a closed room with a humidity of 50% for 14 The composite retarder and the composite rubber powder are from the same batch as the composite retarder and the composite rubber powder used in Example 1, and will not be repeated here.

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Abstract

The invention provides a desulfurized gypsum composition and a preparation method, a gypsum-based interior wall putty and application thereof, and relates to the technical field of architectural coatings. The desulfurized gypsum composition comprises the following components in terms of mass fraction: hemi-aqueous phase desulfurized gypsum 90 %-95%, anhydrous phase desulfurization gypsum 0.5%-3%, dihydrate phase desulfurization gypsum 0.5%-2%, and the balance is impurities. The desulfurized gypsum composition provided by the present invention is synergized with the hemi-aqueous phase desulfurized gypsum, the anhydrous phase desulfurized gypsum and the di-aqueous phase desulfurized gypsum in a specific mass ratio, which effectively improves the traditional gypsum material, which has strong water absorption and is easily deformed by moisture, causing gypsum to be deformed easily. The technical problem that the base interior wall putty cannot be used in a high humidity environment, when it encounters water, it can also effectively inhibit water absorption, reduce solubility, and improve water and moisture resistance, thereby effectively expanding the application range of gypsum materials.

Description

technical field [0001] The invention relates to the technical field of architectural coatings, in particular to a desulfurized gypsum composition and a preparation method, a gypsum-based interior wall putty and applications. Background technique [0002] At present, the putty for interior walls on the market is mainly divided into two categories: gypsum-based and non-gypsum-based. Due to the characteristics of gypsum-based putty, the hardened body of hemihydrate gypsum has a porous structure, and there is a porous network composed of many pores inside, which causes its micro-expansion to cause a large internal surface area. When the gypsum meets water, the water will pass through. The capillary pores flow into the gypsum, and there are a large number of hydrophilic groups on the surface of the gypsum, which makes its own solubility relatively large, which in turn leads to the dissolution of the product and the loss or reduction of the strength of the product. [0003] Non-g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/34
CPCC09D5/34Y02W30/91
Inventor 卢玉杰张瑜瑜李金钟
Owner ASIA PAINT SHANGHAI
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