Plastic emulsifier and preparation method thereof, and interior wall neutral putty powder and preparation method thereof

Abstract

The invention belongs to the field of building decoration materials, and discloses a plastic emulsifier and a preparation method thereof, and interior wall neutral putty powder and a preparation method thereof. The plastic emulsifier comprises the following components: an emulsifier, a setting aid and hydroxypropyl starch ether. The interior wall neutral putty powder prepared from the shaping emulsifier is smooth in construction and free of sagging, the dry film strength is high after the putty powder is applied to a wall in batches, the cost of the putty powder is low, and the quality of the putty powder is stable.

Description

Technical Field

[0001] The invention belongs to the field of building decoration materials, and more specifically, relates to a plastic emulsifier and a preparation method thereof, and an interior wall neutral putty powder and a preparation method thereof. Background Art

[0002] Putty powder is a kind of building decoration material, the main components are heavy calcium powder and organic additives, with a whiteness of more than 75 and a fineness of more than 200. Putty is also a base material used for wall scraping and leveling, and a base for latex paint or wallpaper.

[0003] Currently in the putty powder industry, 50% of the key technical improvements are to achieve good workability through cellulose ether modification, 40% of the key technical improvements are to achieve good workability through thixotropic lubricant modification, and 10% of the key technical improvements are to achieve good workability through pregelatinized starch modification.

[0004] The existing technical formula of cellulose ether modification is heavy calcium, talc, modified cellulose ether, pregelatinized starch, polyvinyl alcohol, hydroxypropyl starch ether, and bentonite. The key technical principle is that the modified cellulose ether plays a role of thickening and thixotropy in addition to water retention. The production process of modified cellulose ether is to modify it by adding other additives for physical mixing or chemical reaction.

[0005] However, the current production cost of putty powder is relatively high, which is specifically reflected in the following: when the same amount of pregelatinized starch is required, the test bonding strength (0.4-0.7MPa) of the putty powder prepared by the existing technical formula of modified cellulose ether is relatively low. The main reason for its low bonding strength is the use of modified cellulose ether. Modified cellulose ether is difficult to dissolve in water and easily agglomerates, which causes serious loss of bonding strength of putty powder and poor thixotropic effect of putty powder. In addition, the water retention of modified cellulose ether does not meet expectations.

[0006] Relevant technical personnel believe that the reason why modified cellulose ether has the above-mentioned problems (difficult to dissolve, easy to agglomerate, causing serious loss of bonding strength of putty powder, and poor promoting effect. Water retention does not meet expectations) is that there is a "black box" in the production process of modified cellulose ether. The specific explanation of the "black box" is: the production process of modified cellulose ether has problems with mixing uniformity, missed feeding, qualified raw materials (water content, ash content, odor, etc.), and index differences. In addition, the index detection of the currently purchased modified cellulose ether materials is simple, the test data visualization is poor, and the viscosity and fineness of the modified cellulose ether cannot be effectively controlled.

[0007] Therefore, in view of the "black box" of modified cellulose ether, which makes it unfavorable for the quality control of putty powder products, it is urgent to develop a product that can replace modified cellulose ether to solve the black box problem, upgrade the quality of putty powder products, reduce the production cost of putty powder, and have strong controllability of raw materials, good product stability, and low strength loss. Summary of the invention

[0008] The purpose of the present invention is to provide a plastic emulsifier and a preparation method thereof and an interior wall neutral putty powder and a preparation method thereof in view of the deficiencies of the prior art. The interior wall neutral putty powder prepared by the present invention using a plastic emulsifier is smooth to construct without sagging, has high dry film strength after the putty powder is applied to the wall, has low putty powder cost, and has stable putty powder quality.

[0009] In order to achieve the above object, the first aspect of the present invention provides a plastic emulsifier, which comprises the following components: an emulsifier, a shaping aid and hydroxypropyl starch ether.

[0010] In the present invention, the mechanism of action of the emulsifier used in the plastic emulsifier is to reduce interfacial tension and increase the surface activity of the slurry, so the emulsifier can make the putty slurry fluffy like cream, and provide the putty with high smoothness of construction; the mechanism of action of the shaping aid is adsorption, flocculation, thickening, and bonding of various organic molecules and inorganic molecules, so the shaping aid can improve the suspension stability and thixotropic shaping of the putty, and it will not collapse or fall, and has the performance of easy pit filling; the mechanism of action of hydroxypropyl starch ether: thickening and preventing segregation, hydroxypropyl starch ether can stabilize the thixotropic lubricity brought by the emulsifier and the shaping aid, and increase its effect 2+1>3

[0011] According to the present invention, preferably, based on the total weight of the plastic emulsifier, the plastic emulsifier comprises: 5-28 weight % of emulsifier, 28-50 weight % of shaping aid and 40-50 weight % of hydroxypropyl starch ether.

[0012] According to the present invention, preferably, the emulsifier is at least one of casein, sodium caseinate, fatty acid soap, alkyl sulfate, alkylbenzene sulfonate, phosphate, polyoxyethylene ether, polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, polyvinyl alcohol, α-olefin sulfonate and lecithin powder;

[0013] Further preferably, the alkyl sulfate is sodium dodecyl sulfate;

[0014] More preferably, the alkylbenzene sulfonate is sodium dodecylbenzene sulfonate.

[0015] According to the present invention, preferably, the particle size of the shaping aid is 95-105 mesh with a pass rate of more than 95%, and the shaping aid is at least one of a water-absorbing resin, polyacrylamide, sodium polyacrylate, a modified mineral water-retaining thickener, guar gum, fumed silica, organic bentonite, attapulgite, kaolin, sodium alginate and magnesium aluminum silicate.

[0016] The second aspect of the present invention provides a method for preparing the plastic emulsifier, which comprises uniformly mixing the emulsifier, a shaping aid and hydroxypropyl starch ether to obtain the plastic emulsifier.

[0017] The third aspect of the present invention provides a neutral putty powder for interior walls, which comprises the following components: heavy calcium powder, cellulose ether, pregelatinized starch and the plastic emulsifier; optionally, it also comprises at least one of talcum powder (inorganic smooth filler), polyvinyl alcohol (whose particle size is 100 mesh pass rate 100%, the product model is preferably 1788) and modified soil.

[0018] According to the present invention, preferably, based on the total weight of the neutral putty powder for interior walls, the neutral putty powder for interior walls comprises: 80-98 weight % of heavy calcium powder, 0.2-0.4 weight % of cellulose ether, 0.8-1.3 weight % of pregelatinized starch, 0.05-0.08 weight % of plastic emulsifier, 0-20 weight % of talc, 0-0.4 weight % of polyvinyl alcohol and 0-0.8 weight % of modified soil.

[0019] According to the present invention, preferably, based on the total weight of the neutral putty powder for interior walls, the neutral putty powder for interior walls comprises: 80-94 weight % of heavy calcium powder, 0.2-0.4 weight % of cellulose ether, 0.8-1.3 weight % of pregelatinized starch, 0.05-0.08 weight % of plastic emulsifier, 4-20 weight % of talc, 0-0.4 weight % of polyvinyl alcohol, and 0.5-0.8 weight % of modified soil.

[0020] According to the present invention, preferably, the oil absorption value of the heavy calcium powder is controlled at 20-30 parts / 100 parts, and the heavy calcium powder is at least one of dolomite powder, calcite powder, limestone powder and marble powder.

[0021] According to the present invention, preferably, the cellulose ether is at least one of hydroxypropyl methylcellulose ether, hydroxyethyl methylcellulose ether, sodium carboxymethyl cellulose and carboxymethyl starch, so as to ensure the moisture and construction properties required for the construction of putty powder.

[0022] According to the present invention, preferably, the particle size of the pregelatinized starch is 65-75 mesh with a pass rate of 100%, and the pregelatinized starch is selected from cassava pregelatinized starch and / or corn pregelatinized starch.

[0023] In the present invention, the pregelatinized starch is a neutral adhesive, which plays a bonding role and can improve the internal strength of the putty layer and the bonding strength with the wall surface.

[0024] According to the present invention, preferably, the particle size of the modified soil is 65-75 mesh with a pass rate of 100%, which is easy to disperse and improves the thixotropy of the putty powder. The modified soil is at least one of sodium bentonite, calcium bentonite, attapulgite, raw ore soil, montmorillonite powder and kaolin powder.

[0025] The fourth aspect of the present invention provides a method for preparing the neutral putty powder for interior walls, the method comprising uniformly mixing heavy calcium powder, cellulose ether, pregelatinized starch and a plastic emulsifier; optionally, adding at least one of talcum powder, polyvinyl alcohol and modified soil and uniformly mixing to obtain the neutral putty powder for interior walls.

[0026] The beneficial effects of the technical solution of the present invention are as follows:

[0027] The present invention uses very few ingredients harmful to the bonding strength of putty powder. Under the condition of requiring the same amount of pregelatinized starch, the bonding strength of the interior wall neutral putty powder formula of the present invention is about 0.2 MPa higher than that of the prior art formula modified with cellulose ether.

[0028] The neutral putty powder for interior walls prepared by the shaping emulsifier of the present invention is smooth in construction and does not sag, has high dry film strength after the putty powder is scraped on the wall, has low putty powder cost, and has stable putty powder quality.

[0029] Other features and advantages of the present invention will be described in detail in the following detailed description. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0031] In the following embodiments and comparative examples:

[0032] Sodium caseinate, Jinan Yuncheng Biotechnology Co., Ltd.;

[0033] Water-absorbent resin, Langfang Yude Energy Saving Technology Co., Ltd.;

[0034] Hydroxypropyl starch ether, Shandong Yiteng YT-301N;

[0035] Sodium dodecylbenzenesulfonate, K12, Hunan Yunbang Biotechnology Co., Ltd.;

[0036] Sodium polyacrylate, Renqiu Pengyu Chemical Co., Ltd.;

[0037] Polyacrylamide, Renqiu Pengyu Chemical Co., Ltd.;

[0038] α-Olefin sulfonate, AOS, Hubei Xinmingtai Chemical Co., Ltd.;

[0039] The heavy calcium powder is Baoding Jintai 250 mesh;

[0040] Cellulose ether has a viscosity of 100,000 from Qiyuan;

[0041] The pregelatinized starch was Rose brand;

[0042] Modified cellulose ether, 100,000 viscosity, Hebei Jitai Cellulose Co., Ltd.

[0043] Example 1

[0044] This embodiment provides a plastic emulsifier, which includes: an emulsifier (sodium caseinate), a shaping aid (water-absorbing resin) and hydroxypropyl starch ether, and the weight percentage of each component is shown in Table 1;

[0045] The preparation method of the plastic emulsifier comprises uniformly mixing the emulsifier, a shaping aid and hydroxypropyl starch ether to obtain the plastic emulsifier.

[0046] This embodiment also provides a neutral putty powder for interior walls, which comprises: heavy calcium powder, cellulose ether, pregelatinized starch, the plastic emulsifier of this embodiment, talcum powder, and modified soil (calcium-based bentonite), and the weight percentage of each component is shown in Table 1;

[0047] The preparation method of the neutral putty powder for interior walls comprises uniformly mixing the above components to obtain the neutral putty powder for interior walls.

[0048] Table 1

[0049]

[0050] Note: The weight percentage of the components of the plastic emulsifier is based on the total weight of the plastic emulsifier; the weight percentage of the components of the neutral putty powder for interior walls is based on the total weight of the neutral putty powder for interior walls.

[0051] The performance of the putty powders of the above embodiments and comparative examples was tested according to Type Y in J / T298-2010. The results are shown in Table 2 below.

[0052] Table 2

[0053]

[0054] It can be seen from Table 2 that the plastic emulsifier of the present invention is beneficial to improving the strength of putty powder. After the putty powder is applied to the wall, the dry film strength is high and the quality of the putty powder is stable.

[0055] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A plastic emulsifier, characterized in that The plastic emulsifier comprises the following components: an emulsifier, a shaping aid and hydroxypropyl starch ether.

2. The plastic emulsifier according to claim 1, wherein Based on the total weight of the plastic emulsifier, the plastic emulsifier comprises: 5-28 weight % of emulsifier, 28-50 weight % of shaping aid and 40-50 weight % of hydroxypropyl starch ether.

3. The plastic emulsifier according to claim 1 or 2, wherein The emulsifier is at least one of casein, sodium caseinate, fatty acid soap, alkyl sulfate, alkyl benzene sulfonate, phosphate, polyoxyethylene ether, polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, polyvinyl alcohol, α-olefin sulfonate and lecithin powder.

4. The plastic emulsifier according to claim 3, wherein The alkyl sulfate is sodium lauryl sulfate; The alkylbenzene sulfonate is sodium dodecylbenzene sulfonate.

5. The plastic emulsifier according to claim 1 or 2, wherein The particle size of the shaping aid is 95-105 mesh with a pass rate of more than 95%, and the shaping aid is at least one of water-absorbing resin, polyacrylamide, sodium polyacrylate, modified mineral water-retaining thickener, guar gum, fumed silica, organic bentonite, attapulgite, kaolin, sodium alginate and magnesium aluminum silicate.

6. The method for preparing the plastic emulsifier according to any one of claims 1 to 5, characterized in that: The preparation method comprises uniformly mixing the emulsifier, the shaping aid and the hydroxypropyl starch ether to obtain the plastic emulsifier.

7. A neutral putty powder for interior walls, characterized in that: The neutral putty powder for interior walls comprises the following components: heavy calcium powder, cellulose ether, pregelatinized starch and the plastic emulsifier according to any one of claims 1 to 5; optionally, it also comprises at least one of talcum powder, polyvinyl alcohol and modified soil.

8. The neutral putty powder for interior walls according to claim 7, wherein: Based on the total weight of the neutral putty powder for interior walls, the neutral putty powder for interior walls comprises: 80-98 weight percent of heavy calcium powder, 0.2-0.4 weight percent of cellulose ether, 0.8-1.3 weight percent of pregelatinized starch, 0.05-0.08 weight percent of plastic emulsifier, 0-20 weight percent of talc, 0-0.4 weight percent of polyvinyl alcohol, and 0-0.8 weight percent of modified soil; Preferably, based on the total weight of the neutral putty powder for interior walls, the neutral putty powder for interior walls includes: 80-94 weight % of heavy calcium powder, 0.2-0.4 weight % of cellulose ether, 0.8-1.3 weight % of pregelatinized starch, 0.05-0.08 weight % of plastic emulsifier, 4-20 weight % of talc, 0-0.4 weight % of polyvinyl alcohol, and 0.5-0.8 weight % of modified soil.

9. The neutral putty powder for interior walls according to claim 7, wherein: The oil absorption value of the heavy calcium powder is controlled at 20-30 parts / 100 parts, and the heavy calcium powder is at least one of dolomite powder, calcite powder, limestone powder and marble powder; The cellulose ether is at least one of hydroxypropyl methyl cellulose ether, hydroxyethyl methyl cellulose ether, sodium carboxymethyl cellulose and carboxymethyl starch; The particle size of the pregelatinized starch is 65-75 mesh with a pass rate of 100%, and the pregelatinized starch is selected from cassava pregelatinized starch and / or corn pregelatinized starch; The particle size of the modified soil is 65-75 mesh with a pass rate of 100%, and the modified soil is at least one of sodium bentonite, calcium bentonite, attapulgite, raw ore soil, montmorillonite powder and kaolin powder.

10. The method for preparing the neutral putty powder for interior walls according to any one of claims 7 to 9, characterized in that: The preparation method comprises uniformly mixing heavy calcium powder, cellulose ether, pregelatinized starch and a plastic emulsifier; optionally, adding at least one of talcum powder, polyvinyl alcohol and modified soil and uniformly mixing them to obtain the neutral putty powder for interior walls.

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