CN110015905B - Decorative gypsum board for removing formaldehyde and preparation method thereof - Google Patents
Decorative gypsum board for removing formaldehyde and preparation method thereof Download PDFInfo
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- CN110015905B CN110015905B CN201810015007.9A CN201810015007A CN110015905B CN 110015905 B CN110015905 B CN 110015905B CN 201810015007 A CN201810015007 A CN 201810015007A CN 110015905 B CN110015905 B CN 110015905B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention provides a decorative gypsum board for removing formaldehyde and a preparation method thereof, wherein the decorative gypsum board comprises a gypsum board substrate and a water-based coating coated on the surface of the gypsum board substrate; the gypsum board substrate comprises the following components: plaster powder, polypeptide, high molecular amine, phosphate, polyvinyl acetate, foaming agent and water; the aqueous coating comprises an aqueous coating comprising modified kaolin and tea polyphenols. The gypsum board can effectively capture indoor formaldehyde for decomposition; thereby effectively reducing the indoor formaldehyde concentration and maintaining the formaldehyde purification effect for a long time. Meanwhile, the gypsum board has a good humidifying function.
Description
Technical Field
The invention relates to the field of building materials, in particular to a decorative gypsum board for removing formaldehyde and a preparation method thereof.
Background
With the attention of people on environmental protection and health, the demand on the functional gypsum board is more and more. The gypsum board is required to have the functions of regulating indoor humidity, purifying aldehyde and the like. There may be a release of formaldehyde whether it is a finishing material or a furniture decoration, etc. Formaldehyde has become one of the main pollutants in the decoration of China. Formaldehyde has the most serious harm to human bodies and the longest incubation period, and is called as a first killer of indoor pollution; formaldehyde is the leading cause of malformations in newborns, childhood leukemia, decline in memory and intelligence in adolescents and is identified by the WHO (world health organization) as a "carcinogenic and teratogenic substance". Chronic poisoning can be caused by long-term exposure to low-dose formaldehyde, and diseases of respiratory system, nervous system, reproductive system and the like can be caused. The harm of formaldehyde to human beings is therefore not negligible. Since the formaldehyde emission period is 3 to 15 years, the formaldehyde-removing gypsum board needs to achieve a long-term effective formaldehyde removal effect.
In the existing formaldehyde-removing gypsum board, the absorption of formaldehyde is unstable only by virtue of an absorption substance, the physical absorption effect has no obvious pertinence, a plurality of components in indoor air can generate competitive absorption effect with formaldehyde, and the problem of absorption saturation exists at the same time. The weak adsorption makes the formaldehyde released possibly, and the effect is difficult to guarantee. The photocatalyst is added into the gypsum board to degrade formaldehyde, so that the requirement on external conditions is high, if ultraviolet light irradiation or visible light excitation catalytic activity is required, the gypsum board usually needs to be subjected to facing treatment when in application, and the photocatalytic reaction is limited; meanwhile, the requirement on indoor humidity is also met; therefore, in practical applications, the net aldehyde effect is difficult to guarantee.
The gypsum board is used as a green interior decoration material, can also adjust humidity, and increases the comfort level of a residence. The decorative gypsum board can be directly applied without facing treatment. The formaldehyde-purifying gypsum board can eliminate formaldehyde in the room effectively for a long time, so that the formaldehyde-purifying decorative gypsum board can provide healthy, comfortable and beautiful living environment for people.
Disclosure of Invention
The invention aims to provide a decorative gypsum board for removing formaldehyde, which is characterized in that a certain content of components such as an aldehyde cleaning agent and phosphate are added into a formula, and modified kaolin added into water-based paint is combined, so that the gypsum board can effectively capture indoor formaldehyde for decomposition; thereby effectively reducing the indoor formaldehyde concentration and maintaining the formaldehyde purification effect for a long time. Meanwhile, the gypsum board has good humidifying function and excellent mechanical property.
The formaldehyde-removing decorative gypsum board comprises a gypsum board substrate and a water-based coating coated on the surface of the gypsum board substrate; the gypsum board substrate comprises the following components: plaster powder, polypeptide, high molecular amine, phosphate, polyvinyl acetate, foaming agent and water; the water-based coating comprises a water-based paint, wherein the water-based paint is added with 1-5% of modified kaolin and 1-3% of tea polyphenol;
the preparation method of the modified kaolin comprises the following steps: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 550-650 deg.C for 1-1.5h, and cooling; placing in a 250ml beaker, adding 100ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 3-5 h; and washing the zeolite with deionized water, and naturally drying to obtain the modified kaolin.
Wherein the gypsum board substrate comprises the following components based on 100 parts by weight of the calcined gypsum powder:
wherein the polypeptide is one or more of antibacterial peptide or casein phosphopeptide; the high molecular amine is one or more of polyallylamine, dendritic polyamide and hyperbranched polyamide.
The polypeptide is a composition of antibacterial peptide and casein phosphopeptide, and the weight ratio of the antibacterial peptide to the casein phosphopeptide is 1: 4-1: 2.
Wherein the weight ratio of the antibacterial peptide to the casein phosphopeptide is 1: 3.
The paint comprises the following components in percentage by weight:
the paint comprises the following components in percentage by weight:
according to another aspect of the present invention, there is provided a method for preparing a decorative gypsum board without formaldehyde, comprising the steps of:
mechanically stirring predetermined parts by weight of calcined gypsum powder, polypeptide, macromolecular amine, phosphate and polyvinyl acetate to obtain uniform solid powder; adding a foaming agent in a predetermined weight part into water, and foaming the mixed solution through a foaming system and then feeding the foamed mixed solution into a stirrer; adding the uniform solid powder into the stirrer, fully stirring the raw materials by the stirrer to prepare uniform slurry, and carrying out extrusion forming, solidification, cutting and drying on the slurry to prepare a gypsum board substrate;
and (3) performing dust removal treatment on the surface of the gypsum board substrate, roller coating water-based paint, and drying to obtain the decorative gypsum board for removing formaldehyde.
The formaldehyde-removing decorative gypsum board comprises a gypsum board substrate and a water-based coating coated on the surface of the gypsum board substrate;
the gypsum board substrate comprises the following components: 100 parts of plaster of paris powder, 0.1-5 parts of polypeptide, 0.01-5 parts of high molecular amine, 0.1-1 part of phosphate, 0.5-2.5 parts of polyvinyl acetate, 0.01-1 part of foaming agent and 70-90 parts of water; the water-based coating comprises water-based paint, wherein the water-based paint is added with 1-5% of modified kaolin and 1-3% of tea polyphenol;
the preparation method of the modified kaolin comprises the following steps: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 550-650 deg.C for 1-1.5h, and cooling; placing in a 250ml beaker, adding 100ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 3-5 h; and washing the zeolite with deionized water, and naturally drying to obtain the modified kaolin.
According to the method, the kaolin is modified by adopting the method, the adsorption pertinence is enhanced, indoor formaldehyde can be actively adsorbed, and the adsorption efficiency is improved; and the formaldehyde adsorption capacity of the modified kaolin is greatly increased compared with that before the modified kaolin is modified. The modified kaolin added by 1-5% can play an excellent formaldehyde adsorption effect, and can avoid coating cracking, so that the gypsum board has good mechanical properties. The addition of 1-3% of tea polyphenol increases the compatibility with other components in the water-based paint, and increases the adhesion with gypsum boards.
The polypeptide is one or more of antibacterial peptide or casein phosphopeptide; the high molecular amine is one or more of polyallylamine, dendritic polyamide and hyperbranched polyamide. The polypeptide selects antibacterial peptide and casein phosphopeptide with high biological activity, and is easy to react with formaldehyde, so that the formaldehyde is degraded.
The high molecular amine is one or more of polyallylamine, dendritic polyamide and hyperbranched polyamide. The high molecular amine has large molecular weight, active property, good thermal stability and easy reaction with formaldehyde, and the generated product is non-toxic and stable. The invention selects high molecular amines such as dendritic polyamide, hyperbranched polyamide and the like because of the terminal amino group, and can achieve better aldehyde-cleaning effect under the condition of less adding amount in the gypsum board.
The weight ratio of the antibacterial peptide to the casein phosphopeptide is 1: 4-1: 2; preferably, it is 1: 3. In the experimental process, the mixture of the polypeptide and the hyperbranched polyamide with the proportion can play a role in retarding the gypsum, so that the flow property of slurry during the forming of the gypsum board is ensured to a great extent, and the production controllability of the gypsum board is better.
Phosphate and polyvinyl acetate are added into the gypsum board, and the aim is to increase the bonding property between the gypsum board and the water-based coating and improve the mechanical property of the gypsum board. Meanwhile, the phosphate, the polyvinyl acetate, the amino acid and the hyperbranched polyamide can enable the gypsum slurry to have better slurry fluidity. The foaming agent can be sodium dodecyl sulfate; the water may be neutral common industrial water or groundwater.
The other components and proportions of the water-based paint adopt the prior conventional technology. Examples include: acrylate monomer, water soluble acrylate prepolymer, pigment, assistant and other components. The acrylate monomer can be one or more of butyl acrylate, cyclohexyl acrylate, isooctyl acrylate and the like; the water-soluble acrylate prepolymer is one or more of water-soluble epoxy acrylate, water-soluble polyurethane acrylate, water-soluble unsaturated polyester acrylate and the like.
The preparation method of the formaldehyde-removing decorative gypsum board mainly comprises the following steps: mechanically stirring polypeptide, high molecular amine, plaster powder, phosphate and polyvinyl acetate in a predetermined weight part to obtain uniform solid powder; adding a foaming agent in a predetermined weight part into water, and foaming the mixed solution through a foaming system and then feeding the foamed mixed solution into a stirrer; adding the uniform solid powder into the stirrer, fully stirring the raw materials by the stirrer to prepare uniform slurry, and performing extrusion forming, solidification, cutting and drying on the slurry to prepare a gypsum board substrate; and (3) performing dust removal treatment on the surface of the gypsum board substrate, roller coating water-based paint, and drying to obtain the formaldehyde-removed decorative gypsum board.
The decorative gypsum board for removing formaldehyde provided by the invention is obviously superior to the products in the prior art in the aspects of purifying formaldehyde for a long time, adjusting indoor humidity and mechanical property.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The formaldehyde-removing decorative gypsum board comprises a gypsum board substrate and a water-based coating coated on the surface of the gypsum board substrate;
the gypsum board substrate comprises the following components: 100 parts of calcined gypsum powder, 1-15 parts of aldehyde cleaning agent, 0.1-1 part of phosphate, 0.5-2.5 parts of polyvinyl acetate, 0.01-1 part of foaming agent and 70-90 parts of water; the water-based coating comprises water-based paint, wherein the water-based paint is added with 1-5% of modified kaolin and 1-3% of tea polyphenol;
mixing 20g of kaolin with an equal amount of tartaric acid; firing at 600 ℃ for 1.5h, and cooling; placing in a 250ml beaker, adding 100ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 3-5 h; and washing the zeolite with deionized water, and naturally drying to obtain the modified kaolin.
The gypsum board substrate comprises the following components in parts by weight based on 100 parts by weight of the calcined gypsum powder: 100 parts of calcined gypsum powder; 0.1-5 parts of polypeptide; 0.01-5 parts of macromolecular amine; 0.1-1 part by weight of phosphate; 0.5-2.5 parts by weight of polyvinyl acetate; 0.01-1 part by weight of foaming agent; 70-90 parts of water.
The polypeptide is one or more of antibacterial peptide or casein phosphopeptide; preferably, the composition is a composition of an antimicrobial peptide and a casein phosphopeptide. The weight ratio of the antibacterial peptide to the casein phosphopeptide is 1: 4-1: 2; preferably, 1: 3; the high molecular amine is one or more of polyallylamine, dendritic polyamide and hyperbranched polyamide.
Specific examples of the components and their amounts of the decorative gypsum board excluding formaldehyde are shown below.
Examples
Mechanically stirring 100 parts by weight of calcined gypsum powder, 0.1-5 parts by weight of polypeptide, 0.01-5 parts by weight of macromolecular amine, 0.1-1 part by weight of phosphate and 0.5-2.5 parts by weight of polyvinyl acetate to obtain uniform solid powder; adding 0.01-1 part by weight of foaming agent into water, and feeding the mixed solution into a stirrer after foaming by a foaming system; adding the uniform solid powder into a stirrer, fully stirring the raw materials by the stirrer to prepare uniform slurry, and performing extrusion forming, solidification, cutting and drying on the slurry to prepare a gypsum board substrate; and (3) performing dust removal treatment on the surface of the gypsum board substrate, roller coating water-based paint, and drying to obtain the formaldehyde-removed decorative gypsum board.
Table 1 lists some example data of the invention. It should be noted that the data in table 1 are part of the selected experimental process, and the embodiments of the present invention are not limited to the following data.
Table 1 examples of formulations for decorative gypsum boards with formaldehyde removal
Test example
Test example 1
The formaldehyde adsorption conditions of gypsum boards of a blank group (without adding modified kaolin), a kaolin group added with 2 and a modified kaolin group added with 3 in the water-based paint are respectively tested. At 1m3Formaldehyde is dripped into the closed cavity in advance, and the initial formaldehyde concentration is measured to be 2mg/m3And putting 9.5mm thick gypsum boards with the length and the width of 0.5m respectively, and detecting the change of the formaldehyde concentration in the chamber within 48h along with the change of time respectively. The specific test results are shown in table 2.
TABLE 2 Formaldehyde concentration variation for blank and experimental groups
| Formaldehyde concentration (mg/m)3) | 12h | 24h | 48h |
| 1 | 1.92 | 1.89 | 1.86 |
| 2 | 1.90 | 1.88 | 1.84 |
| 3 | 1.65 | 1.43 | 1.20 |
It can be seen from the tests in table 2 that the gypsum board of group 3 to which the modified kaolin was added was significantly higher in formaldehyde removal effect than the gypsum board of the blank group and to which kaolin was added.
Test example 3
The following test analyses were conducted on the formaldehyde-removing decorative gypsum boards of the examples. At 1m3In the chamber, the formaldehyde is added in an amount of 3 μ L, continuously dripping formaldehyde every day, putting a 9.5mm thick gypsum board with the length and width of 0.5m, and respectively detecting the concentration of formaldehyde in the chamber within 1-10 d. Specific data are shown in table 3. Data in mg/m in Table 33。
TABLE 3 Formaldehyde-cleaning Effect of the gypsum boards of the examples
| 1d | 2d | 3d | 4d | 5d | 6d | 8d | 10d | |
| Blank bin | 0.58 | 0.56 | 0.59 | 0.57 | 0.53 | 0.55 | 0.58 | 0.56 |
| Example 1 | 0.08 | 0.07 | 0.08 | 0.09 | 0.08 | 0.08 | 0.07 | 0.09 |
| Example 2 | 0.05 | 0.07 | 0.06 | 0.06 | 0.07 | 0.07 | 0.06 | 0.07 |
| Example 3 | 0.02 | 0.01 | 0.02 | 0.01 | 0.02 | 0.01 | 0.02 | 0.01 |
| Example 4 | 0.06 | 0.05 | 0.07 | 0.08 | 0.07 | 0.09 | 0.08 | 0.07 |
| Example 5 | 0.01 | 0.02 | 0.03 | 0.02 | 0.02 | 0.03 | 0.02 | 0.02 |
| Example 6 | 0.05 | 0.05 | 0.04 | 0.08 | 0.06 | 0.09 | 0.08 | 0.09 |
| Example 7 | 0.04 | 0.04 | 0.06 | 0.05 | 0.03 | 0.05 | 0.04 | 0.03 |
As can be seen from the data in Table 3, the effective rate of the formaldehyde-removing decorative gypsum board in each example is as high as more than 90% in 24 h; and along with the continuous dripping of formaldehyde, the formaldehyde-removing effect of the decorative gypsum board can be maintained for a long time. The formaldehyde-removing decorative gypsum board of example 1 has a formaldehyde-cleaning effect that meets the daily indoor formaldehyde-cleaning requirements.
Test example 3
Meanwhile, the mechanical properties of the formaldehyde-removed decorative gypsum board (9.5mm) are also tested in a relevant manner. The mechanical properties of the formaldehyde-free decorative gypsum boards after the initial preparation were tested, and the mechanical properties of neat aldehyde 10d were also tested. The initial mechanical properties data are shown in Table 4 (cf. Standard GB/T9775-2008).
TABLE 4 mechanical Properties of the plasterboards of the examples
As can be seen from the above, the formaldehyde-removing decorative gypsum board of the invention has excellent formaldehyde-removing effect, and the mechanical properties of the gypsum board are far higher than the national standard.
In conclusion, the decorative gypsum board for removing formaldehyde disclosed by the invention has the advantages that the components such as polypeptide and phosphate with certain content are added in the formula, and the modified kaolin added in the water-based paint is combined, so that the gypsum board can effectively capture indoor formaldehyde for decomposition; thereby effectively reducing the indoor formaldehyde concentration, maintaining the formaldehyde purifying effect for a long time and continuously degrading the formaldehyde for 30 to 40 years. Meanwhile, the gypsum board has good humidifying function and excellent mechanical property.
Finally, it should be noted that: in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A decorative gypsum board for removing formaldehyde is characterized by comprising a gypsum board substrate and a water-based coating coated on the surface of the gypsum board substrate; the gypsum board substrate comprises the following components: plaster powder, polypeptide, high molecular amine, phosphate, polyvinyl acetate, foaming agent and water; the water-based coating comprises a water-based paint, wherein the water-based paint is added with 1-5% of modified kaolin and 1-3% of tea polyphenol;
the preparation method of the modified kaolin comprises the following steps: mixing 20g of kaolin with an equal amount of tartaric acid; burning at 550-650 deg.C for 1-1.5h, and cooling; placing in a 250ml beaker, adding 100ml deionized water and 50ml hexadecyl trimethyl ammonium bromide solution with the concentration of 20mmol/L, and magnetically stirring for 3-5 h; washing with deionized water, and naturally drying to obtain the modified kaolin;
the polypeptide is one or more of antibacterial peptide or casein phosphopeptide; the high molecular amine is one or more of polyallylamine, dendritic polyamide and hyperbranched polyamide.
2. The formaldehyde-scavenging decorative gypsum board of claim 1, wherein the gypsum board substrate comprises the following components, based on 100 parts by weight of the calcined gypsum powder:
3. the formaldehyde-removing decorative gypsum board of claim 2, wherein said polypeptide is a combination of an antimicrobial peptide and a casein phosphopeptide, and the weight ratio of said antimicrobial peptide to said casein phosphopeptide is 1:4 to 1: 2.
4. The formaldehyde-scavenging decorative gypsum board of claim 3, wherein the weight ratio of said antimicrobial peptide to said casein phosphopeptide is 1: 3.
5. The formaldehyde-scavenging decorative gypsum board of claim 2, comprising the following components in amounts:
6. the formaldehyde-scavenging decorative gypsum board of claim 2, comprising the following components in amounts:
7. the method of making the formaldehyde-scavenging decorative gypsum board of any one of claims 1-6, comprising the steps of:
mechanically stirring predetermined parts by weight of calcined gypsum powder, polypeptide, macromolecular amine, phosphate and polyvinyl acetate to obtain uniform solid powder; adding a foaming agent in a predetermined weight part into water, and foaming the mixed solution through a foaming system and then feeding the foamed mixed solution into a stirrer; adding the uniform solid powder into the stirrer, fully stirring the raw materials by the stirrer to prepare uniform slurry, and carrying out extrusion forming, solidification, cutting and drying on the slurry to prepare a gypsum board substrate;
and (3) performing dust removal treatment on the surface of the gypsum board substrate, roller coating water-based paint, and drying to obtain the decorative gypsum board for removing formaldehyde.
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| Title |
|---|
| Impact of building materials on indoor formaldehyde levels: Effect of ceiling tiles, mineral fiber insulation and gypsum board;Jan Gunschera et al;《Building and Environment》;20130615;p138-145 * |
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| Publication number | Publication date |
|---|---|
| CN110015905A (en) | 2019-07-16 |
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