Formaldehyde-removing decorative gypsum board and preparation method thereof
A gypsum board and formaldehyde technology, which is applied in the field of decorative gypsum board and its preparation, can solve the problems such as difficult to guarantee the effect, difficult to guarantee the net aldehyde effect, and weak adsorption
Active Publication Date: 2020-11-13
BEIJING NEW BUILDING MATERIALS PLC
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Problems solved by technology
The weak adsorption makes formaldehyde may be released, and the effect is difficult to guarantee
However, adding photocatalyst to degrade formaldehyde in gypsum board requires more external conditions, such as ultraviolet light irradiation or visible light to stimulate catalytic activity, and gypsum board usually needs to be decorated with finishing treatment, which limits the progress of photocatalytic reaction; at the same time There are also requirements for indoor humidity; therefore, in practical applications, the net aldehyde effect is also difficult to guarantee
Method used
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Experimental program
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Effect test
Embodiment
[0039] 100 parts by weight of plaster powder, 0.1-5 parts by weight of polypeptide, 0.01-5 parts by weight of polymer amines, 0.1-1 part by weight of phosphate, and 0.5-2.5 parts by weight of polyvinyl acetate are mechanically stirred to obtain a uniform Solid powder; 0.01-1 parts by weight of foaming agent is added to water, and the mixed solution is foamed by the foaming system and then enters the mixer; uniform solid powder is added to the mixer, and each raw material is fully stirred by the mixer to obtain a uniform slurry. The material is extruded, solidified, cut, and dried to obtain a gypsum board substrate; the surface of the gypsum board substrate is dedusted, rolled with water-based paint, and dried to obtain a formaldehyde-free decorative gypsum board.
[0040] Table 1 lists the data of some examples of the present invention. It should be noted that the data in Table 1 are part of the selected data during the experiment, and the embodiments of the present invention ...
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The invention provides a decorative gypsum board for removing formaldehyde and a preparation method of the decorative gypsum board. The gypsum board comprises a gypsum board substrate and a waterbornecoating layer coated on the surface of the gypsum board substrate, wherein the gypsum board substrate comprises the following components: a plaster powder, a polypeptide, a polymer amine, a phosphate, polyvinyl acetate, a foaming agent and water; and the waterborne coating layer comprises a waterborne coating, and the waterborne coating comprises modified kaolin and tea polyphenol. The gypsum board can effectively capture and decompose indoor formaldehyde, therefore the indoor formaldehyde concentration is effectively reduced, and the aldehyde purification effect can be maintained for a longtime. At the same time, the gypsum board has a good humidity regulation function.
Description
technical field [0001] The invention relates to the field of building materials, in particular to a formaldehyde-removing decorative gypsum board and a preparation method thereof. Background technique [0002] As people pay more attention to environmental protection and health, the demand for functional gypsum boards is increasing. It is required that the gypsum board has the functions of adjusting indoor humidity and removing aldehydes. Whether it is decoration materials or furniture accessories, formaldehyde may be released. Formaldehyde has become one of the main pollutants in the decoration of our country. Formaldehyde is the most harmful to the human body and has the longest incubation period. It is called "the first killer of indoor pollution". "Carcinogenic and teratogenic substances". Long-term exposure to low-dose formaldehyde can cause chronic poisoning, causing diseases such as the respiratory system, nervous system, and reproductive system. Therefore, the ha...
Claims
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IPC IPC(8): C04B38/10C04B28/14C04B20/02
CPCC04B20/023C04B28/14C04B2111/00017C04B2111/00025C04B2111/40C04B2201/50C04B24/14C04B24/121C04B22/16C04B24/2623C04B38/10C04B14/106
Inventor 陈红霞周建中王霞李帆张晓菲贾严严冉秀云
Owner BEIJING NEW BUILDING MATERIALS PLC