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Dried gypsum composition and ypsum-based coating

A gypsum-based coating and composition technology, applied in cement coatings and other directions, can solve the problems of research, color spots cannot be treated equally, and achieve uniform color, excellent design, and the effect of inhibiting color spots.

Active Publication Date: 2013-08-28
YOSHINO GYPSUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, although these materials all contain gypsum as a filler, their main components are inorganic powder or high-alumina cement. In these proposals, there is no problem in the present invention, which uses gypsum as a base material and is used as an interior wall. A study of stains on painted surfaces formed by dry plaster compositions of facing materials
In addition, the wet coating based on gypsum is basically pure white, so the problem of stains cannot be treated in the same way as the stains of conventional colored finishing materials mainly composed of the above-mentioned materials. technical research

Method used

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  • Dried gypsum composition and ypsum-based coating
  • Dried gypsum composition and ypsum-based coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13、 comparative example 1～3

[0044] (preparation of hemihydrate gypsum)

[0045] As the hemihydrate gypsum used in the examples and comparative examples, the following materials are prepared: β type hemihydrate gypsum and α type hemihydrate gypsum are calculated according to the mass basis with the ratio of the two being β type hemihydrate gypsum: α type hemihydrate gypsum Gypsum = 15:1 mixed material.

[0046] (Preparation of dry gypsum composition)

[0047] In 100 parts of the above-prepared hemihydrate gypsum, add 1 part of iron oxide (brown) as a pigment and a crystal modifier according to the amounts shown in Table 1. Add the compounds shown in Table 1 as crystal modifiers, and mix Machine fully mixed and stirred to obtain the dry gypsum compositions of Examples 1-13 and Comparative Examples 1-3 respectively. Wherein, the above-mentioned dry gypsum composition further contains 10 parts by mass of calcium carbonate and 8 parts by mass of diatomaceous earth.

[0048] (Evaluation)

[0049] (1) The g...

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PUM

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Abstract

The present invention is a dried gypsum composition characterized by: comprising gypsum hemihydrate, at least one pigment, and a habit modifier; the habit modifier being at least one compound selected from the group consisting of a sulfate, a carboxylate, a carbonate, and an inorganic salt, the amount added being in the range of 0.1-5 masses for every 100 masses of the gypsum hemihydrate; and the gypsum dihydrate when the gypsum hemihydrate is hydrated being controlled in a manner so as to form plate-shaped crystals having an aspect ratio of 1-9. The present invention further is a gypsum-based coating using the dried gypsum composition.

Description

technical field [0001] The present invention relates to a dry gypsum composition and a gypsum-based paint capable of suppressing the occurrence of stains on a wall surface or the like formed of the composition or the paint. More specifically, it relates to a dry gypsum composition before adding water and a gypsum-based paint obtained by kneading after adding water, which are used for forming a colored wall surface containing a pigment. Background technique [0002] Conventionally, wet paints kneaded with water have been used as finishing materials for interior walls. There are various main materials of wet paint, but gypsum-based paint is widely used from the viewpoint of fire resistance and comfort of the formed interior wall. Gypsum-based paints are generally commercialized as dry gypsum compositions, which contain plaster of paris (especially hemihydrate gypsum) as the main component and various additives added appropriately to form a design Or functional walls such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B22/10C04B22/12C04B22/14C04B24/04C04B24/12C04B24/34C04B111/82
CPCC04B28/145C04B2111/00482C04B40/0608C04B2111/00517C04B22/10C04B22/124C04B22/142C04B22/148C04B24/04C04B24/20C04B24/34C04B2103/54C04B14/08C04B14/28C04B28/14C04B22/12C04B24/12C09D1/06C09D1/08
Inventor 山下琢治山口雅人田中嘉一
Owner YOSHINO GYPSUM CO LTD