CN108530010B - Polyvinyl acetate polymer cement-based waterproof coating and preparation method thereof - Google Patents
Polyvinyl acetate polymer cement-based waterproof coating and preparation method thereof Download PDFInfo
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- CN108530010B CN108530010B CN201810475220.8A CN201810475220A CN108530010B CN 108530010 B CN108530010 B CN 108530010B CN 201810475220 A CN201810475220 A CN 201810475220A CN 108530010 B CN108530010 B CN 108530010B
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- polyvinyl acetate
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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
- C04B28/18—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 mixtures of the silica-lime type
- C04B28/186—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
- C04B28/188—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step the Ca-silicates being present in the starting mixture
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a polyvinyl acetate polymer cement-based waterproof coating and a preparation method thereof, wherein the polyvinyl acetate polymer cement-based waterproof coating comprises the following components in parts by weight: 100 parts of tricalcium silicate cement, 40-60 parts of strontium calcium sulphoaluminate cement, 70-110 parts of polyvinyl acetate emulsion, 60-80 parts of quartz sand, 6-14 parts of polysiloxane, 1-5 parts of silane coupling agent, 10-20 parts of silicon nitride, 10-16 parts of zinc citrate and 25-35 parts of calcium oxide. The preparation method comprises the following steps: mixing tricalcium silicate cement, strontium calcium sulphoaluminate cement, quartz sand, silicon nitride and silicon carbide, dispersing the mixture in polyvinyl acetate emulsion, heating to 85 ℃, adding polysiloxane and silane coupling agent, stirring for reaction, cooling when the quantity of Si-C, Si-O-C, Si-C-N, Si-O-Si in a reaction system is not changed, adding calcium oxide and zinc citrate, and homogenizing. The polymer cement-based waterproof coating produced by the invention can be dried and solidified quickly, has good compatibility among materials and high structural strength, and has excellent wear resistance, aging resistance, water resistance, durability and thermal stability.
Description
Technical Field
The invention relates to the technical field of polyurethane waterproof coatings, in particular to a polyvinyl acetate polymer cement-based waterproof coating and a preparation method thereof.
Background
The polyvinyl acetate polymer cement-based waterproof coating is a bi-component waterproof coating compounded by liquid materials and powder materials, wherein the liquid materials are formed by optimally combining polyvinyl acetate emulsion and various additives, the powder materials are formed by sleeving cement and fine sand, the flexibility of polyvinyl acetate and the rigidity of cement are concentrated, and the waterproof coating has excellent waterproofness, durability and stability.
The patent with the application number of CN201604799. X discloses a high-performance double-component polyvinyl acetate polymer cement-based waterproof coating for a building outer wall and a preparation method thereof, wherein the waterproof coating is obtained by mixing liquid material A consisting of polyvinyl acetate emulsion, liquid nitrile rubber and other additives, and powder consisting of inorganic fillers such as silicate cement and nano zirconium silicate, and has excellent comprehensive performances such as wear resistance, aging resistance, water resistance, good thermal stability and the like, but the problem of poor compatibility of an organic liquid material and inorganic powder is not solved, and the coating is not easy to condense and solidify.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a polyvinyl acetate polymer cement-based waterproof coating and a preparation method thereof.
The technical scheme of the invention is summarized as follows:
a polyvinyl acetate polymer cement-based waterproof coating comprises the following components in parts by weight:
preferably, the polysiloxane comprises one or more of cyclomethicone, aminosiloxane, polymethylphenylsiloxane, polyether polysiloxane copolymer.
Preferably, the silane coupling agent comprises one or more of KH550, KH570, a151, a 171.
The preparation method of the polyvinyl acetate polymer cement-based waterproof coating specifically comprises the following steps: mixing tricalcium silicate cement, strontium calcium sulphoaluminate cement, quartz sand, silicon nitride and silicon carbide, dispersing the obtained mixture in polyvinyl acetate emulsion, heating to 85 ℃, adding polysiloxane and silane coupling agent, stirring for reaction, cooling to room temperature when the quantity of Si-C, Si-O-C, Si-C-N, Si-O-Si in a reaction system is not changed, adding calcium oxide and zinc citrate, and homogenizing to obtain the polyvinyl acetate polymer cement-based waterproof coating. The invention has the beneficial effects that:
(1) the invention uses quartz sand and zinc citrate to form reinforcing agent, which reacts with hydration product and water absorbent calcium oxide to generate CaSiO3、Ca3(C6H5O7)2、3Zn(OH)2When hard insoluble dendritic crystals are used for blocking concrete capillary channels and micropores, the compatibility and structural stability of the coating are improved, a stable Si-C, Si-O-C, Si-C-N, Si-O-Si three-dimensional network structure is generated through an organic phase formed by silane coupling agent bridge polyvinyl acetate emulsion and polysiloxane and an inorganic phase formed by cement, quartz sand and silicon nitride, materials are tightly embedded and compatible, and the common dicalcium silicate cement is replaced by tricalcium silicate and strontium calcium sulphoaluminate composite cement, so that the solidification and drying time is saved.
(2) The invention utilizes the hydration property of cement to absorb the water of polyvinyl acetate emulsion to form concrete gel, then utilizes the dispersibility of the polyvinyl acetate emulsion to gradually agglomerate and attach to the inorganic phase surfaces of cement, filler, hydration products and the like along with the loss of the water, further strengthens the coating structure, and simultaneously fills gaps and micropores by means of the chemical change or physical change of a reinforcing agent and silicon nitride, thereby improving the water resistance, durability and base layer adaptability of the coating.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
The invention provides a polyvinyl acetate polymer cement-based waterproof coating which comprises the following components in parts by weight:
the invention takes tricalcium silicate cement as a gelling substrate, can absorb water in polyvinyl acetate emulsion, is quickly hydrated into calcium silicate gel at normal temperature, has stronger hydration reaction compared with dicalcium silicate cement, saves the drying and solidifying time of the waterproof coating, and has high solidifying strength, and the hydration reaction equation is as follows:
x represents the calcium-silicon ratio, n represents the amount of bound water, and y represents the number of water molecules for hydration of calcium silicate.
Compared with portland cement, the strontium calcium sulphoaluminate cement as a gelling auxiliary material has shorter setting time, higher structural strength and stronger corrosion resistance and freeze-thaw resistance, and the hydration reaction equation is as follows: 3CaO 3Al2O3·SrSO4+H2O→SrSO4+CaO·Al2O3·10H2O+2CaO·Al2O3·6H2O+Al2O3,CaO·Al2O3·10H2O→3CaO·Al2O3·6H2O+4CaO·Al2O3·13H2O+Al2O3·3H2O,4CaO·Al2O3·13H2O→4CaO·Al2O·3H2O+Ca(OH)2。
Calcium oxide as water absorbent for accelerating drying and solidification of coating and cooperating with hydration products Ca (OH)2The water-based paint has the following reaction equation that the water-based paint generates a chemical reaction with a reinforcing agent compounded by quartz sand and zinc citrate to generate hard insoluble dendritic crystals to block capillary channels and micropores of concrete and seal the whole waterproof layer, thereby improving the physical strength of a coating film and blocking water flow and acid-base corrosion in any direction:
the generated reaction water can activate the gelled active material again, so that the compatibility and stability of the coating are further enhanced, and the mechanical property of the coating is further improved.
The polysiloxane is used as a defoaming agent, simultaneously reduces the surface tension of the surface layer of the coating film and strengthens the hydrophobicity, and comprises one or more of cyclomethicone, aminosiloxane, polymethylphenylsiloxane and polyether polysiloxane copolymer. The silicon nitride has high bond strength, excellent thermal stability, oxidation resistance and lubricity, extremely high hardness, can be stably dispersed in pores of concrete, and improves the seepage prevention, ageing resistance and mechanical strength of a coating film. The silane coupling agent generates a stable Si-C, Si-O-C, Si-C-N, Si-O-Si network structure mainly through an organic phase consisting of bridge polyvinyl acetate emulsion and polysiloxane and an inorganic phase consisting of cement, quartz sand and silicon nitride, so that materials are tightly embedded, the compatibility of different phases is improved, the adhesion force between the coating and a base layer and the structural stability are further improved, and the coating comprises one or more of KH550, KH570, A151 and A171.
The preparation method of the polyvinyl acetate polymer cement-based waterproof coating comprises the following specific steps: mixing tricalcium silicate cement, strontium calcium sulphoaluminate cement, quartz sand, silicon nitride and silicon carbide, dispersing the obtained mixture in polyvinyl acetate emulsion, heating to 85 ℃, adding polysiloxane and silane coupling agent, stirring for reaction, cooling to room temperature when the quantity of Si-C, Si-O-C, Si-C-N, Si-O-Si in a reaction system is not changed, adding calcium oxide and zinc citrate, and homogenizing to obtain the polyvinyl acetate polymer cement-based waterproof coating.
The following table lists the specific formulations of the different examples and the performance parameters of the resulting water-repellent coatings:
attached table:
as can be seen from the above table, the invention obviously shortens the drying time of the polymer cement-based waterproof coating, and improves the mechanical property and structural strength of the coating, so that the coating has excellent tensile resistance, wear resistance, water resistance, durability and thermal stability.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (3)
1. The polyvinyl acetate polymer cement-based waterproof coating is characterized by comprising the following components in parts by weight:
100 parts of tricalcium silicate cement;
40-60 parts of strontium calcium sulphoaluminate cement;
70-110 parts of polyvinyl acetate emulsion;
60-80 parts of quartz sand;
6-14 parts of polysiloxane;
1-5 parts of a silane coupling agent;
10-20 parts of silicon nitride;
10-16 parts of zinc citrate;
25-35 parts of calcium oxide.
2. The polyvinyl acetate polymer cement-based waterproof coating material as claimed in claim 1, wherein the polysiloxane comprises one or more of cyclomethicone, aminosiloxane, polymethylphenylsiloxane, polyether polysiloxane copolymer.
3. The polyvinyl acetate polymer cement-based waterproof coating material as claimed in claim 1, wherein the silane coupling agent comprises one or more of KH550, KH570, A151 and A171.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810475220.8A CN108530010B (en) | 2018-05-17 | 2018-05-17 | Polyvinyl acetate polymer cement-based waterproof coating and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810475220.8A CN108530010B (en) | 2018-05-17 | 2018-05-17 | Polyvinyl acetate polymer cement-based waterproof coating and preparation method thereof |
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| Publication Number | Publication Date |
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| CN108530010A CN108530010A (en) | 2018-09-14 |
| CN108530010B true CN108530010B (en) | 2021-02-23 |
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| CN201810475220.8A Active CN108530010B (en) | 2018-05-17 | 2018-05-17 | Polyvinyl acetate polymer cement-based waterproof coating and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276232A (en) * | 2011-05-31 | 2011-12-14 | 王天补 | Novel waterproof dry powder coating |
| CN105669097A (en) * | 2014-11-22 | 2016-06-15 | 黄石永明环保科技有限公司 | Polymer cement waterproof coating |
| CN105777053A (en) * | 2016-03-31 | 2016-07-20 | 济南维高建材技术有限公司 | Single-component quick-drying and quick-hardening type polymer cement waterproof coating and use method thereof |
| CN107417206A (en) * | 2017-07-27 | 2017-12-01 | 芜湖市三山龙城新材料有限公司 | Environment-friendly waterproof paint and preparation method thereof |
| CN107986715A (en) * | 2017-12-20 | 2018-05-04 | 安徽力峰建材科技有限公司 | The cement water-proof slurry that a kind of anti-chemical noxious corrodes |
-
2018
- 2018-05-17 CN CN201810475220.8A patent/CN108530010B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276232A (en) * | 2011-05-31 | 2011-12-14 | 王天补 | Novel waterproof dry powder coating |
| CN105669097A (en) * | 2014-11-22 | 2016-06-15 | 黄石永明环保科技有限公司 | Polymer cement waterproof coating |
| CN105777053A (en) * | 2016-03-31 | 2016-07-20 | 济南维高建材技术有限公司 | Single-component quick-drying and quick-hardening type polymer cement waterproof coating and use method thereof |
| CN107417206A (en) * | 2017-07-27 | 2017-12-01 | 芜湖市三山龙城新材料有限公司 | Environment-friendly waterproof paint and preparation method thereof |
| CN107986715A (en) * | 2017-12-20 | 2018-05-04 | 安徽力峰建材科技有限公司 | The cement water-proof slurry that a kind of anti-chemical noxious corrodes |
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| CN108530010A (en) | 2018-09-14 |
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Address after: 231533 Mahe Road, Weidang village, Tongda Town, Lujiang County, Hefei City, Anhui Province Patentee after: Anhui langkaiqi Technology Co.,Ltd. Address before: 231533 Mahe Road, Weidang village, Tongda Town, Lujiang County, Hefei City, Anhui Province Patentee before: ANHUI LENCAQI WATERPROOF TECHNOLOGY CO.,LTD. |
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