CN114921146A - Light polymer cement waterproof coating and preparation method thereof - Google Patents
Light polymer cement waterproof coating and preparation method thereof Download PDFInfo
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- CN114921146A CN114921146A CN202210728408.5A CN202210728408A CN114921146A CN 114921146 A CN114921146 A CN 114921146A CN 202210728408 A CN202210728408 A CN 202210728408A CN 114921146 A CN114921146 A CN 114921146A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D109/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a polymer cement waterproof coating, which comprises a component A and a component B, wherein the component A contains a water-based emulsion, the component B contains cement and a filler, the water-based emulsion comprises an emulsion containing a first acrylic resin, the filler is prepared by performing closed-cell treatment on powder with a porous structure on the surface by using a second acrylic resin, the powder is a combination of machine-made sand and perlite, and the mass ratio of the emulsion containing the second acrylic resin to the powder is 5-8: 100. according to the invention, the specific powder is subjected to surface closed pore treatment by adopting the acrylic resin and then introduced into the polymer cement waterproof coating, so that the light polymer cement waterproof coating can be obtained and is matched with the aqueous emulsion in the polymer cement waterproof coating for use, and excellent comprehensive mechanical properties are obtained.
Description
Technical Field
The invention belongs to the technical field of waterproof coatings, and particularly relates to a lightweight polymer cement waterproof coating and a preparation method thereof.
Background
The polymer cement waterproof coating has good waterproof and anti-permeability performance and strong bonding force with a base layer, and is generally used for waterproof and moistureproof projects of buildings and other projects. The general polymer cement waterproof paint adopts materials such as heavy calcium carbonate, quartz powder, quartz sand, calcium sand, dolomite powder and the like as fillers, the density of the formed product is high, and more than 2kg of materials are needed for one-time painting with the thickness of 1mm per square meter.
Chinese patent CN113817363A discloses a low-density polymer cement waterproof coating and a preparation method thereof, wherein the low-density polymer cement waterproof coating is independently packaged liquid materials and powder materials, and the liquid materials comprise (by mass percent): 85-90% of styrene-acrylic emulsion, 0.1-0.2% of mildew preventive, 8-10% of pure water and 8-9% of waterproofing agent; the powder comprises (by mass percent): 50-55% of portland cement, 25-30% of ground calcium carbonate, 10-20% of quartz sand, 3-6% of hollow glass microspheres and 5-10% of rutile titanium dioxide. According to the method, the ultra-low-density hollow glass beads are used as the density-reducing filler, so that the overall density of the material is effectively guaranteed, the material usage amount under the unit area and the standard thickness is reduced, and the material cost is saved. However, although the hollow glass beads can reduce the density of the coating to a certain extent, the glass beads are easy to generate large static electricity due to friction in powder, so that the adhesion force with a high polymer material is insufficient, the hollow glass beads are poor in compatibility with an emulsion system and cannot be used in a large proportion, and the waterproof and mechanical properties of the coating are affected due to the fact that the combination emulsion is difficult to disperse.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a light polymer cement waterproof coating with excellent mechanical property and a preparation method thereof, which obviously reduces the unit area consumption.
In order to achieve the purpose, the technical scheme is as follows:
the polymer cement waterproof coating comprises a component A and a component B, wherein the component A comprises an aqueous emulsion, the component B comprises cement and a filler, the aqueous emulsion comprises an emulsion containing a first acrylic resin, the filler is prepared by performing closed-cell treatment on powder with a porous structure on the surface by using a second acrylic resin, the powder is a combination of machine-made sand and perlite, and the mass ratio of the emulsion containing the second acrylic resin to the powder is 5-8: 100.
Further, the filler is obtained by spraying emulsion containing the second acrylic resin on the powder and drying.
According to some preferred embodiments of the present invention, the emulsion containing the second acrylic resin has a solid content of 60 to 70%. The proportion of the emulsion containing the second acrylic resin with proper solid content and the powder is selected, so that the porous surface of the powder is closed, and the powder is prevented from absorbing water when the powder is combined with the emulsion. If the solid content of the emulsion is too high, the surface adsorption of the powder is not easy to carry out, and the powder is easy to stick together; if the solid content of the emulsion is too low, the pores on the surface of the powder can easily absorb the water in the emulsion into the pores, and the pores on the surface of the powder cannot be sealed, even the weight of the powder is increased. The proper liquid-powder ratio can ensure that the holes on the surface of the powder are effectively sealed, and the mutual adhesion of the powder or the weight increment of the powder is avoided. If the mass ratio of the emulsion containing the second acrylic resin to the powder is low, holes on the surface of the powder cannot be completely sealed; if the mass ratio of the emulsion containing the second acrylic resin to the powder is high, this may result in mutual adhesion of the powders or weight increase of the powder.
Further, the solids content of the emulsion containing the second acrylic resin is greater than the solids content of the emulsion containing the first acrylic resin.
In some preferred and specific embodiments, the mass ratio of the machine-made sand to perlite is 30-65: 5 to 25.
Preferably, the grain size of the machine-made sand is 100-140 meshes, and the grain size of the perlite is 80-100 meshes.
In some embodiments, the feedstock of the manufactured sand comprises a first component comprising cement, an air-entraining agent, and a coagulant, and a second component comprising water, a flocculant, and a foaming agent, the preparation of the manufactured sand comprising: and mixing the first component in a sand making machine, spraying the second component in the mixing process, preparing particles by the sand making machine, and drying to obtain the machine-made sand.
Further, the preparation of the filler comprises the steps of mixing the machine-made sand and perlite in a sand making machine, spraying the emulsion containing the second acrylic resin during the mixing process, and drying to obtain the filler; or, the preparation of the filler comprises 1) adding machine-made sand into a sand making machine, then spraying the emulsion containing the second acrylic resin, and drying to obtain closed-cell treated machine-made sand; 2) and adding perlite into a sand making machine, spraying the emulsion containing the second acrylic resin, and drying to obtain the perlite subjected to closed cell treatment.
Further, the first component comprises 91-95% of Portland cement, 4-8% of aluminate cement, 0.3-0.8% of air entraining agent and 0.1-0.5% of coagulant by weight percentage; the second component comprises, by weight, 99.4-99.86% of water, 0.1-0.5% of polyacrylamide and 0.04-0.1% of fatty alcohol-polyoxyethylene ether sodium sulfate.
According to some embodiments of the invention, the mass ratio of the first component to the second component is 1: 0.15 to 0.25.
According to some embodiments of the invention, the mass ratio of component a to component B is 1:1.5 to 2.5.
According to some embodiments of the invention, the aqueous emulsion further comprises a styrene-butadiene emulsion.
According to some embodiments of the present invention, the component A comprises 39 to 80% by weight of an emulsion containing the first acrylic resin, 19 to 60% by weight of a styrene-butadiene emulsion, 0 to 0.5% by weight of an antifoaming agent, and 0.05 to 0.5% by weight of a preservative; the component B comprises, by weight, 19-56% of white cement, 42-79% of filler, 1-2% of retarder and 0.1-0.25% of water reducer.
Preferably, the component A comprises 75-80 wt% of emulsion containing first acrylic resin, 19-24 wt% of butylbenzene emulsion, 0.1-0.5 wt% of defoaming agent and 0.1-0.5 wt% of preservative; the component B comprises, by weight, 19-23% of white cement, 75-79% of filler, 1-2% of retarder and 0.1-0.25% of water reducer.
Preferably, the solid content of the emulsion containing the first acrylic resin is 45-58%. The solid content of the emulsion containing the first acrylic resin is low, and the prepared polymer cement waterproof coating has good fluidity. The emulsion containing the second acrylic resin has high solid content, and the high solid content is used for water loss to quickly form a film, preferably, the glass transition temperature of the second acrylic resin is more than or equal to 15 ℃, so that the particles can be prevented from being adhered together in the preparation process.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, the powder is subjected to surface closed pore treatment by adopting the acrylic resin and then introduced into the polymer cement waterproof coating, so that the light polymer cement waterproof coating can be obtained, and the light polymer cement waterproof coating is matched with the aqueous emulsion in the polymer cement waterproof coating for use, and excellent comprehensive mechanical properties can be obtained. And the polymer cement waterproof coating is adopted, and only the waterproof coating with the thickness of 1mm per square meter needs less than 1.5kg is coated once, so that the unit area consumption is obviously reduced, and the cost is greatly reduced.
Detailed Description
The technical solutions of the present invention are described in detail below with reference to specific examples so that those skilled in the art can better understand and implement the technical solutions of the present invention, but the present invention is not limited to the scope of the examples.
In the following examples, FS-300H from Bardefu corporation was used as the first acrylic resin-containing emulsion, the solid content was 56. + -. 1%, and the glass transition temperature was-8 ℃. The emulsion containing the second acrylic resin is FS-360B of Badfu company, the solid content is 61 +/-1 percent, and the glass transition temperature is 16 ℃. The butylbenzene emulsion is M3632 of Shengxi Ou company, the solid content is 50 +/-1%, and the glass transition temperature is-15 ℃.
Example 1
The lightweight polymer cement waterproof coating provided by the embodiment is prepared by the following method:
(1) preparation of component A
79.5g of emulsion containing the first acrylic resin, 20g of butylbenzene emulsion, 0.3g of antifoaming agent and 0.2g of preservative are mixed to obtain the component A.
(2) Preparation of component B
20g of 32.5 white cement, 78.9g of filler, 1g of sodium pyrophosphate and 0.1g of water reducing agent were mixed to obtain component B.
In this example, the filler was closed-cell treated machine sand 63.9g and closed-cell treated perlite 15 g.
The preparation method of the closed-pore processed machine-made sand comprises the following steps: mixing 94.2g of PO42.5 gray cement, 5g of CA80 aluminate cement, 0.5g of air entraining agent and 0.3g of coagulant to obtain a first component; 99.62g of water, 0.3g of polyacrylamide and 0.08g of fatty alcohol-polyoxyethylene ether sodium sulfate are mixed to obtain a second component; adding the first component into a sand making machine, stirring and mixing, spraying the second component into the sand making machine in the stirring and mixing process, making particles with the particle size of 100-140 meshes by the sand making machine, drying to obtain machine-made sand, adding the machine-made sand into the sand making machine, spraying an emulsion containing second acrylic resin into the sand making machine, and drying to obtain the acrylic resin emulsion, wherein the mass ratio of the machine-made sand to the emulsion containing the second acrylic resin is 100:5, and the mass ratio of the first component to the second component is 1: 0.25.
the preparation method of the perlite subjected to closed cell treatment comprises the following steps: adding 80-100-mesh perlite into a sand making machine, spraying emulsion containing second acrylic resin into the sand making machine, and drying to obtain the acrylic resin emulsion, wherein the mass ratio of the perlite to the emulsion containing the second acrylic resin is 100: 5.
In this example, the mass ratio of component A to component B was 1: 1.5.
Example 2
The preparation method of the lightweight polymer cement waterproof coating provided by the embodiment is basically the same as that of the embodiment 1, and the difference is that: 40g of emulsion containing the first acrylic resin, 59.5g of butylbenzene emulsion, 0.3g of antifoaming agent and 0.2g of preservative are mixed to obtain the component A.
Example 3
The preparation method of the lightweight polymer cement waterproof coating provided by the embodiment is basically the same as that of the embodiment 1, and the difference is that: component B was obtained by mixing 20g of 32.5 white cement, 78.9g of filler, 1g of sodium pyrophosphate and 0.1g of water reducing agent.
In this example, the filler was closed-cell treated machine sand 53.9g and closed-cell treated perlite 25 g.
Example 4
The preparation method of the lightweight polymer cement waterproof coating provided by the embodiment is basically the same as that of the embodiment 1, except that: component B was obtained by mixing 55g of 32.5 white cement, 42.8g of filler, 1g of sodium pyrophosphate and 0.2g of water reducing agent.
In this example, the filler was closed cell treated machine sand 34.4g and closed cell treated perlite 8.4 g.
Comparative example 1
The preparation method of the polymer cement waterproof coating provided by the comparative example is basically the same as that of the example 1, except that: hollow glass beads are used to replace the pretreated perlite.
Comparative example 2
The preparation method of the polymer cement waterproof coating provided by the comparative example is basically the same as that of the example 1, except that: when the surface treatment machine is used for manufacturing sand and perlite, the emulsion containing the first acrylic resin is used for replacing the emulsion containing the second acrylic resin.
Comparative example 3
The preparation method of the polymer cement waterproof coating provided by the comparative example is basically the same as that of the example 1, except that: closed-cell treated machine-made sand is used for replacing closed-cell treated perlite, namely the filler is closed-cell treated machine-made sand, and the using amount of the filler is 78.9 g.
Comparative example 4
The preparation method of the polymer cement waterproof coating provided by the comparative example is basically the same as that of the example 1, except that: the machine sand and perlite were not surface treated, i.e., were not closed cell.
Table 1 shows the results of the performance tests of the polymer cement waterproof coatings of examples 1 to 4 and comparative examples 1 to 4
Note: the method for testing the tensile strength, the elongation at break, the adhesive strength and the water impermeability refers to the national standard GB/T23445-2009, and when the dosage per unit area is tested, the thickness of the frame is 1mm and the area is 0.5m according to GB/T23445-2009 2 The glass frame is coated and maintained for one time, then the thickness of 50 points is uniformly tested, and the unit area consumption is calculated according to the actual consumption.
As can be seen from Table 1, the polymer cement waterproof coating prepared by the representative embodiment of the invention has the characteristics of small density, light weight, small unit area dosage and excellent mechanical property, and has certain functions of heat insulation and sound insulation due to the cavity structure of the powder. In order to achieve a significant lightening effect, the amount per unit area of the present invention is set to not more than 1.5kg/m 2 /mm。
In example 2, compared with example 1, the amount of the acrylic emulsion is reduced, the amount of the styrene-butadiene emulsion is increased, and although the tensile strength and the elongation at break are obviously reduced, the adhesive strength is still increased within the qualified range.
Compared with the embodiment 1, the embodiment 3 reduces the dosage of the machine-made sand and increases the dosage of the perlite, and though the dosage per unit area is increased, the tensile strength and the elongation at break are still improved within the qualified range.
In example 4, the amount of the white cement used was increased as compared with example 1, the tensile strength and the adhesive strength were improved, and the elongation at break was decreased and the amount used per unit area was increased, but the content was still within the acceptable range.
Comparative example 1 compared with example 1, the hollow glass beads are adopted to replace the pretreated perlite, and the tensile strength, the elongation at break and the water impermeability are unqualified.
Comparative example 2 compared to example 1, the emulsion containing the first acrylic resin was used when surface treating machine-made sand and perlite, because of its low solid content, it was not sufficiently closed, the pores were prone to adsorb materials, the density increased, and the amount per unit area was not acceptable.
Compared with the example 1, the machine-made sand subjected to the closed-cell treatment is adopted to replace the perlite subjected to the closed-cell treatment, the unit area consumption is reduced, and the tensile strength and the elongation at break are unqualified.
Comparative example 4 compared with example 1, the surface treatment of the machine-made sand and perlite is not carried out, the inner holes of the machine-made sand and perlite are easy to adsorb materials, the density is increased, and the dosage per unit area is unqualified.
The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this means. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
Claims (10)
1. A polymer cement waterproofing coating comprising a component a and a component B, said component a comprising an aqueous emulsion, said component B comprising cement and a filler, said aqueous emulsion comprising an emulsion comprising a first acrylic resin, characterized in that: the filler is prepared by performing closed-cell treatment on powder with a porous structure on the surface by adopting second acrylic resin, the powder is a combination of machine-made sand and perlite, and the mass ratio of emulsion containing the second acrylic resin to the powder is 5-8: 100.
2. the polymer cement waterproofing coating according to claim 1, characterized in that: the filler is obtained by spraying the emulsion containing the second acrylic resin on the powder and drying.
3. The polymer cement waterproof coating material according to claim 1, characterized in that: the solid content of the emulsion containing the second acrylic resin is 60-70%, and the solid content of the emulsion containing the second acrylic resin is larger than that of the emulsion containing the first acrylic resin.
4. The polymer cement waterproofing coating according to claim 1, characterized in that: the mass ratio of the machine-made sand to the perlite is 30-65: 5 to 25.
5. The polymer cement waterproofing coating according to claim 4, characterized in that: the grain size of the machine-made sand is 100-140 meshes, and the grain size of the perlite is 80-100 meshes.
6. The polymer cement waterproofing coating according to claim 1, characterized in that: the raw material of the manufactured sand comprises a first component and a second component, the first component comprises cement, an air entraining agent and a coagulant, the second component comprises water, a flocculant and a foaming agent, and the manufactured sand is prepared by the following steps: and mixing the first component in a sand making machine, spraying the second component in the mixing process, preparing particles by the sand making machine, and drying to obtain the machine-made sand.
7. The polymer cement waterproof coating material according to claim 6, characterized in that: the mass ratio of the first component to the second component is 1: 0.15 to 0.25; and/or, the first component comprises 91-95% of Portland cement, 4-8% of aluminate cement, 0.3-0.8% of air entraining agent and 0.1-0.5% of coagulant by weight percentage; the second component comprises, by weight, 99.4-99.86% of water, 0.1-0.5% of polyacrylamide and 0.04-0.1% of fatty alcohol-polyoxyethylene ether sodium sulfate.
8. The polymer cement waterproofing coating according to claim 1 or 3, characterized in that: the solid content of the emulsion containing the first acrylic resin is 45-58%, and the aqueous emulsion further comprises butylbenzene emulsion.
9. The polymer cement waterproof coating material according to claim 1, characterized in that: the mass ratio of the component A to the component B is 1:1.5 to 2.5.
10. The polymer cement waterproofing coating according to claim 1, characterized in that: the component A comprises 39-80 wt% of emulsion containing first acrylic resin, 19-60 wt% of butylbenzene emulsion, 0-0.5 wt% of defoaming agent and 0.05-0.5 wt% of preservative; the component B comprises, by weight, 19-56% of white cement, 42-79% of filler, 1-2% of retarder and 0.1-0.25% of water reducer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116496668A (en) * | 2023-04-28 | 2023-07-28 | 江苏凯伦建材股份有限公司 | Polymer cement waterproof paint and application thereof |
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