CN110885220B - Polymer cement waterproof coating suitable for low-temperature environment and preparation method thereof - Google Patents
Polymer cement waterproof coating suitable for low-temperature environment and preparation method thereof Download PDFInfo
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- CN110885220B CN110885220B CN201911406385.0A CN201911406385A CN110885220B CN 110885220 B CN110885220 B CN 110885220B CN 201911406385 A CN201911406385 A CN 201911406385A CN 110885220 B CN110885220 B CN 110885220B
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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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
- C04B2111/2092—Resistance against biological degradation
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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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- Paints Or Removers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a polymer cement waterproof coating suitable for a low-temperature environment and a preparation method thereof. The waterproof coating comprises liquid materials and powder materials; the liquid material comprises the following raw materials in parts by weight: 15-30 parts of composite emulsion, 20-35 parts of plasticizer, 0.5-1 part of dispersant, 0.1-0.5 part of preservative and 8-15 parts of water; the powder comprises the following raw materials in parts by weight: 30-40 parts of cement, 15-25 parts of filler and 0.5-2 parts of water reducing agent; the composite emulsion material is added into the liquid material of the waterproof coating, the composite emulsion material is a composite core-shell structure of isooctyl acrylate, 4- (N, N-dimethylamino) benzyl methacrylate and glycidyl acrylate, and the core-shell structure enables the waterproof coating to still maintain excellent toughness at low temperature.
Description
Technical Field
The invention relates to the technical field of polymer cement waterproof coatings, in particular to a polymer cement waterproof coating suitable for a low-temperature environment and a preparation method thereof.
Background
The polymer cement waterproof paint, JS waterproof paint for short, is a bi-component water-based waterproof paint which is prepared by taking polymer emulsion of acrylic ester, ethylene-vinyl acetate and the like and cement as main raw materials, adding filler and other auxiliary agents, and curing into a film through water volatilization and cement hydration reaction. Because the construction is simple, the advantages of extensibility, compactness and high strength of the polymer coating and easy bonding with a wet base layer are achieved, different engineering environments can be met by adjusting the proportion of the polymer emulsion and the cement, and the water-based waterproof coating is widely applied to water-based waterproof coating products in recent years.
The polymer cement waterproof coating is divided into two components of liquid material and powder material, after being mixed and stirred uniformly, the polymer emulsion wraps cement particles in the powder material component and other filler aggregates, after coating, partial water in the emulsion volatilizes, and high-molecular particles are dehydrated and adhered together to form a continuous elastic film; meanwhile, the residual water in the emulsion and the cement in the powder component are hydrated and hardened, and the inorganic cementing material in the powder component and the water in the emulsion are volatilized to form an elastic film to jointly form a waterproof coating structure of an interpenetrating network. The traditional polymer cement waterproof coating has the following defects: due to the existence of inorganic gelled materials, the polymer cement waterproof coating has certain strength and cannot have better ductility and low temperature resistance like a polymer water emulsion building waterproof coating (acrylic waterproof coating). Under a low-temperature environment, the fracture elongation of the polymer cement waterproof coating is sharply attenuated, the capability of bridging cracks is poor, once a base layer deforms, the waterproof layer is easy to crack, meanwhile, the intermolecular activities are in a frozen state at corresponding temperatures, and almost no self-repairing capability exists.
Disclosure of Invention
The invention aims to solve the technical problems and provide a polymer cement waterproof coating suitable for low-temperature environment and a preparation method thereof.
The purpose of the invention is realized as follows: a polymer cement waterproof coating suitable for low-temperature environment comprises a liquid material and a powder material;
the liquid material comprises the following raw materials in parts by weight: 15-30 parts of composite emulsion, 20-35 parts of plasticizer, 0.5-1 part of dispersant, 0.1-0.5 part of preservative and 8-15 parts of water;
the powder comprises the following raw materials in parts by weight: 30-40 parts of cement, 15-25 parts of filler and 0.5-2 parts of water reducing agent;
the composite emulsion comprises the following raw materials in parts by weight: 5-10 parts of 1,6 hexanediol diacrylate, 5-10 parts of dodecanoic acid monoethanolamide, 10-15 parts of polyoxyethylene sorbitan monooleate, 10-15 parts of sodium alkyl benzene sulfonate, 5-10 parts of alkylphenol ethoxylate, 5-10 parts of alkyl alcohol polyether ammonium sulfate, 1200-1800 parts of deionized water, 1000-1500 parts of isooctyl acrylate, 400-600 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 10-20 parts of glycidyl acrylate and 2-5 parts of potassium persulfate;
the filler comprises 5-10 parts of sodium carbonate, 8-12 parts of vermiculite powder, 8-15 parts of cordierite micro powder, 5-10 parts of water glass and 5-15 parts of nano white carbon black.
The polymer cement waterproof coating suitable for the low-temperature environment is further optimized by the following steps: the cement is portland cement or aluminate cement.
The polymer cement waterproof coating suitable for the low-temperature environment is further optimized by the following steps: the plasticizer is dioctyl phthalate, dioctyl adipate or epoxy octyl stearate.
The polymer cement waterproof coating suitable for the low-temperature environment is further optimized by the following steps: the dispersant is a polyacrylic acid sodium salt dispersant, sodium dodecyl benzene sulfonate, sodium hexametaphosphate, potassium tripolyphosphate or tetrapotassium pyrophosphate.
The polymer cement waterproof coating suitable for the low-temperature environment is further optimized by the following steps: the preservative is Node C15 bactericidal preservative or Daoweishi-75.
The polymer cement waterproof coating suitable for the low-temperature environment is further optimized by the following steps: the water reducing agent is a polycarboxylic acid type water reducing agent or a melamine water reducing agent.
The preparation method of the polymer cement waterproof coating comprises the following steps:
s1 preparation of composite emulsion
The following raw materials are taken according to parts by weight: 5-10 parts of 1,6 hexanediol diacrylate, 5-10 parts of dodecanoic acid monoethanolamide, 10-15 parts of polyoxyethylene sorbitan monooleate, 10-15 parts of sodium alkyl benzene sulfonate, 5-10 parts of alkylphenol ethoxylate, 5-10 parts of alkyl alcohol polyether ammonium sulfate, 1200-1800 parts of deionized water, 1000-1500 parts of isooctyl acrylate, 400-600 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 10-20 parts of glycidyl acrylate and 2-5 parts of potassium persulfate;
taking deionized water and dodecanoic acid monoethanolamide, stirring uniformly, heating to 80-90 ℃, adding 1/3 potassium persulfate while stirring, then adding 1,6 hexanediol diacrylate, polyoxyethylene sorbitan monooleate, sodium alkyl benzene sulfonate and isooctyl acrylate, stirring continuously, cooling to 60-65 ℃, adding the rest potassium persulfate while stirring, and finally adding alkylphenol ethoxylate, alkyl alcohol polyether ammonium sulfate, 4- (N, N-dimethylamino) benzyl methacrylate and glycidyl acrylate to prepare a composite emulsion;
s2 preparation of liquid material
The following raw materials are taken according to parts by weight: 15-30 parts of composite emulsion, 0.5-1 part of stabilizer, 20-35 parts of plasticizer, 0.5-1 part of dispersant, 0.1-0.5 part of preservative and 8-15 parts of water;
mixing water, a dispersing agent and a preservative, uniformly stirring, then adding the composite emulsion and the plasticizer, mixing, and uniformly stirring to obtain a liquid material;
s3 preparation of powder
The following raw materials are taken according to parts by weight: 30-40 parts of cement, 15-25 parts of filler and 0.5-2 parts of water reducing agent, and the cement, the filler and the water reducing agent are mixed and then uniformly stirred to obtain powder.
The invention has the beneficial effects that:
firstly, the powder of the waterproof coating adopts the composite filler, the composite filler contains sodium carbonate, water glass and nano white carbon black, when the waterproof coating is aged in the later period and is subjected to water seepage, the sodium carbonate is contacted with water to produce sodium hydroxide, an alkaline environment is formed inside a modified asphalt layer, and the water glass, the nano white carbon black and SiO in the polymethyl silicone resin in the modified asphalt layer2The reaction can be carried out, and the calcium silicate generated by the reaction can fill up the seepage gap and prevent further water seepage;
the composite filler contains vermiculite powder and cordierite micro powder, because water molecules between inner layers of the vermiculite powder are subjected to high-temperature firing, the volume is increased by dozens of times, the cordierite micro powder contains a large number of hematite and goethite thin hexagonal small pieces which are arranged in a directional mode, the cordierite micro powder and the vermiculite powder are matched with each other to form a blocking layer in an outer coating layer, and the blocking layer can block water and other corrosive substances from permeating the outer coating layer, so that the waterproof coating has better waterproof performance;
secondly, the composite emulsion is added into the liquid material of the waterproof coating, the composite emulsion is a composite core-shell structure of isooctyl acrylate, 4- (N, N-dimethylamino) benzyl methacrylate and glycidyl acrylate, and the waterproof coating still keeps excellent toughness at low temperature due to the core-shell structure.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments.
Example 1
A polymer cement waterproof paint suitable for low-temperature environment comprises a liquid material and a powder material.
The liquid material comprises the following raw materials in parts by weight: 25 parts of composite emulsion, 25 parts of plasticizer, 1 part of dispersant, 0.5 part of preservative and 10 parts of water;
the cement is portland cement. The plasticizer is dioctyl phthalate. The dispersant is a sodium polyacrylate dispersant. The preservative is a Nord C15 bactericidal preservative. The water reducing agent is a polycarboxylic acid type water reducing agent.
The powder comprises the following raw materials in parts by weight: 35 parts of cement, 20 parts of filler and 1 part of water reducing agent;
the filler comprises 8 parts of sodium carbonate, 10 parts of vermiculite powder, 10 parts of cordierite micro powder, 8 parts of water glass and 10 parts of nano white carbon black.
The composite emulsion comprises the following raw materials in parts by weight: 5 parts of 1,6 hexanediol diacrylate, 10 parts of dodecanoic acid monoethanolamide, 10 parts of polyoxyethylene sorbitan monooleate, 15 parts of sodium alkyl benzene sulfonate, 5 parts of alkylphenol ethoxylate, 5 parts of alkyl alcohol polyether ammonium sulfate, 1500 parts of deionized water, 1500 parts of isooctyl acrylate, 400 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 20 parts of glycidyl acrylate and 2 parts of potassium persulfate.
Example 2
A polymer cement waterproof paint suitable for low-temperature environment comprises a liquid material and a powder material.
The liquid material comprises the following raw materials in parts by weight: 15 parts of composite emulsion, 20 parts of plasticizer, 1 part of dispersant, 0.1 part of preservative and 15 parts of water;
the cement is aluminate cement. The plasticizer is dioctyl adipate. The dispersant is sodium dodecyl benzene sulfonate. The preservative is Daoweishi-75. The water reducing agent is melamine water reducing agent.
The powder comprises the following raw materials in parts by weight: 30 parts of cement, 25 parts of filler and 0.5 part of water reducing agent;
the filler comprises 5 parts of sodium carbonate, 12 parts of vermiculite powder, 8 parts of cordierite micro powder, 10 parts of water glass and 5 parts of nano white carbon black.
The composite emulsion comprises the following raw materials in parts by weight: 10 parts of 1,6 hexanediol diacrylate, 10 parts of dodecanoic acid monoethanolamide, 10 parts of polyoxyethylene sorbitan monooleate, 10 parts of sodium alkyl benzene sulfonate, 5 parts of alkylphenol ethoxylate, 10 parts of alkyl alcohol polyether ammonium sulfate, 1200 parts of deionized water, 1500 parts of isooctyl acrylate, 600 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 10 parts of glycidyl acrylate and 5 parts of potassium persulfate.
Example 3
A polymer cement waterproof paint suitable for low-temperature environment comprises a liquid material and a powder material.
The liquid material comprises the following raw materials in parts by weight: 30 parts of composite emulsion, 35 parts of plasticizer, 0.5 part of dispersant, 0.5 part of preservative and 8 parts of water;
the cement is aluminate cement. The plasticizer is epoxy octyl stearate. The dispersant is sodium hexametaphosphate. The preservative is a Nord C15 bactericidal preservative. The water reducing agent is melamine water reducing agent.
The powder comprises the following raw materials in parts by weight: 40 parts of cement, 15 parts of filler and 2 parts of water reducing agent;
the filler comprises 10 parts of sodium carbonate, 8 parts of vermiculite powder, 15 parts of cordierite micro powder, 5 parts of water glass and 15 parts of nano white carbon black.
The composite emulsion comprises the following raw materials in parts by weight: 8 parts of 1,6 hexanediol diacrylate, 8 parts of dodecanoic acid monoethanolamide, 10 parts of polyoxyethylene sorbitan monooleate, 12 parts of sodium alkyl benzene sulfonate, 6 parts of alkylphenol ethoxylate, 8 parts of alkyl alcohol polyether ammonium sulfate, 1600 parts of deionized water, 1200 parts of isooctyl acrylate, 500 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 15 parts of glycidyl acrylate and 3 parts of potassium persulfate.
Example 4
A polymer cement waterproof paint suitable for low-temperature environment comprises a liquid material and a powder material.
The liquid material comprises the following raw materials in parts by weight: 20 parts of composite emulsion, 30 parts of plasticizer, 1 part of dispersant, 0.5 part of preservative and 10 parts of water;
the cement is portland cement. The plasticizer is dioctyl phthalate. The dispersant is tetrapotassium pyrophosphate. The preservative is Daoweishi-75. The water reducing agent is a polycarboxylic acid type water reducing agent.
The powder comprises the following raw materials in parts by weight: 35 parts of cement, 22 parts of filler and 1 part of water reducing agent;
the filler comprises 8 parts of sodium carbonate, 10 parts of vermiculite powder, 12 parts of cordierite micro powder, 8 parts of water glass and 10 parts of nano white carbon black.
The composite emulsion comprises the following raw materials in parts by weight: 5 parts of 1,6 hexanediol diacrylate, 10 parts of dodecanoic acid monoethanolamide, 15 parts of polyoxyethylene sorbitan monooleate, 12 parts of sodium alkyl benzene sulfonate, 8 parts of alkylphenol ethoxylate, 8 parts of alkyl alcohol polyether ammonium sulfate, 1600 parts of deionized water, 1200 parts of isooctyl acrylate, 600 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 20 parts of glycidyl acrylate and 2 parts of potassium persulfate.
Example 5
A preparation method of a polymer cement waterproof coating suitable for a low-temperature environment comprises the following steps:
s1 preparation of composite emulsion
The following raw materials are taken according to parts by weight: 10 parts of 1,6 hexanediol diacrylate, 10 parts of dodecanoic acid monoethanolamide, 10 parts of polyoxyethylene sorbitan monooleate, 10 parts of sodium alkyl benzene sulfonate, 5 parts of alkylphenol ethoxylate, 10 parts of alkyl alcohol polyether ammonium sulfate, 1200 parts of deionized water, 1500 parts of isooctyl acrylate, 600 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 10 parts of glycidyl acrylate and 5 parts of potassium persulfate.
Taking deionized water and dodecanoic acid monoethanolamide, stirring uniformly, heating to 80 ℃, adding 1/3 potassium persulfate while stirring, then adding 1,6 hexanediol diacrylate, polyoxyethylene sorbitan monooleate, sodium alkyl benzene sulfonate and isooctyl acrylate, continuing stirring, cooling to 65 ℃, adding the rest potassium persulfate while stirring, and finally adding alkylphenol ethoxylate, alkyl alcohol polyether ammonium sulfate, 4- (N, N-dimethylamino) benzyl methacrylate and glycidyl acrylate to prepare a composite emulsion;
s2 preparation of liquid material
The following raw materials are taken according to parts by weight: 15 parts of composite emulsion, 20 parts of plasticizer, 1 part of dispersant, 0.1 part of preservative and 15 parts of water;
mixing water, a dispersing agent and a preservative, uniformly stirring, then adding the composite emulsion and the plasticizer, mixing, and uniformly stirring to obtain a liquid material;
s3 preparation of powder
The following raw materials are taken according to parts by weight: 30 parts of cement, 25 parts of filler and 0.5 part of water reducing agent, and the cement, the filler and the water reducing agent are mixed and then uniformly stirred to obtain powder.
The filler comprises 5 parts of sodium carbonate, 12 parts of vermiculite powder, 8 parts of cordierite micro powder, 10 parts of water glass and 5 parts of nano white carbon black.
The cement is portland cement. The plasticizer is dioctyl phthalate. The dispersant is a sodium polyacrylate dispersant. The preservative is a Nord C15 bactericidal preservative. The water reducing agent is a polycarboxylic acid type water reducing agent.
Example 6
A preparation method of a polymer cement waterproof coating suitable for a low-temperature environment comprises the following steps:
s1 preparation of composite emulsion
The following raw materials are taken according to parts by weight: 8 parts of 1,6 hexanediol diacrylate, 8 parts of dodecanoic acid monoethanolamide, 10 parts of polyoxyethylene sorbitan monooleate, 12 parts of sodium alkyl benzene sulfonate, 6 parts of alkylphenol ethoxylate, 8 parts of alkyl alcohol polyether ammonium sulfate, 1600 parts of deionized water, 1200 parts of isooctyl acrylate, 500 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 15 parts of glycidyl acrylate and 3 parts of potassium persulfate.
Taking deionized water and dodecanoic acid monoethanolamide, stirring uniformly, heating to 80 ℃, adding 1/3 potassium persulfate while stirring, then adding 1,6 hexanediol diacrylate, polyoxyethylene sorbitan monooleate, sodium alkyl benzene sulfonate and isooctyl acrylate, continuing stirring, cooling to 65 ℃, adding the rest potassium persulfate while stirring, and finally adding alkylphenol ethoxylate, alkyl alcohol polyether ammonium sulfate, 4- (N, N-dimethylamino) benzyl methacrylate and glycidyl acrylate to prepare a composite emulsion;
s2 preparation of liquid material
The following raw materials are taken according to parts by weight: 30 parts of composite emulsion, 0.5 part of stabilizer, 35 parts of plasticizer, 0.5 part of dispersant, 0.5 part of preservative and 8 parts of water;
mixing water, a dispersing agent and a preservative, uniformly stirring, then adding the composite emulsion and the plasticizer, mixing, and uniformly stirring to obtain a liquid material;
s3 preparation of powder
The following raw materials are taken according to parts by weight: 40 parts of cement, 15 parts of filler and 2 parts of water reducing agent, and the cement, the filler and the water reducing agent are mixed and then uniformly stirred to obtain powder.
The filler comprises 10 parts of sodium carbonate, 8 parts of vermiculite powder, 15 parts of cordierite micro powder, 5 parts of water glass and 15 parts of nano white carbon black.
The cement is portland cement. The plasticizer is dioctyl phthalate. The dispersant is a sodium polyacrylate dispersant. The preservative is a Nord C15 bactericidal preservative. The water reducing agent is a polycarboxylic acid type water reducing agent.
Example 7
A preparation method of polymer cement waterproof coating suitable for low-temperature environment changes the formula of the filler in example 5 into the following formula: 8 parts of sodium carbonate, 20 parts of vermiculite powder, 8 parts of water glass and 10 parts of nano white carbon black. And other conditions are unchanged, and the waterproof coating is prepared.
Example 8
A preparation method of polymer cement waterproof coating suitable for low-temperature environment changes the formula of the filler in example 5 into the following formula: 8 parts of sodium carbonate, 20 parts of cordierite powder, 8 parts of water glass and 10 parts of nano white carbon black. And other conditions are unchanged, and the waterproof coating is prepared.
Example 9
A preparation method of a polymer cement waterproof coating suitable for a low-temperature environment is characterized in that the formula of the liquid material in example 5 is changed into: 30 parts of pure acrylate emulsion, 0.5 part of stabilizer, 35 parts of plasticizer, 0.5 part of dispersant, 0.5 part of preservative and 8 parts of water. And other conditions are unchanged, and the waterproof coating is prepared.
And (3) performance detection:
the waterproof coatings prepared in examples 5 to 9 were subjected to elongation at break, tensile strength and water impermeability tests after film formation at 0 ℃, and the waterproof coatings were tested according to the standard of GB/T23445-2009 to obtain the test results shown in the following table:
from the results of the above table it can be seen that: the waterproof coatings of the embodiments 5, 6 and 9 have no water permeability phenomenon after 30min under 2.0MPa, because the waterproof coatings of the embodiments 5, 6 and 9 comprise the combination of vermiculite powder and cordierite micro powder, water molecules in the inner layers of the vermiculite powder are subjected to high-temperature firing, the volume is increased by dozens of times, the cordierite micro powder contains a large amount of hematite and goethite thin hexagonal small pieces which are arranged in a directional mode, the cordierite micro powder and the vermiculite powder are matched with each other to form a barrier layer in a paint film, and the barrier layer can resist the penetration of water and other corrosive substances to the paint film, so that the outer coating has excellent waterproof and anticorrosion performances. In examples 7 and 8, the vermiculite powder and the cordierite micro powder are respectively and singly adopted, and mutual matching of the vermiculite powder and the cordierite micro powder cannot be realized, so that the water permeation phenomenon does not occur only under 0.3MPa for 30min, and the water permeation phenomenon occurs after the pressure is increased. In addition, the tensile strength and the elongation at break of the coatings of examples 5 to 8 are both significantly higher than those of the coating of example 9, because the composite emulsion material is added into the coatings of examples 5 to 8, and the composite emulsion material is a composite core-shell structure of isooctyl acrylate, 4- (N, N-dimethylamino) benzyl methacrylate and glycidyl acrylate, the core-shell structure enables the waterproof coating to still maintain excellent toughness at low temperature. Therefore, the tensile strength and the elongation at break of the waterproof coating are higher than those of the waterproof coating without the composite emulsion when the waterproof coating is tested at the temperature of 0 ℃.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (7)
1. A polymer cement waterproof coating suitable for low-temperature environment is characterized in that: comprises liquid material and powder material;
the liquid material comprises the following raw materials in parts by weight: 15-30 parts of composite emulsion, 20-35 parts of plasticizer, 0.5-1 part of dispersant, 0.1-0.5 part of preservative and 8-15 parts of water;
the powder comprises the following raw materials in parts by weight: 30-40 parts of cement, 15-25 parts of composite filler and 0.5-2 parts of water reducing agent;
the composite emulsion comprises the following raw materials in parts by weight: 5-10 parts of 1,6 hexanediol diacrylate, 5-10 parts of dodecanoic acid monoethanolamide, 10-15 parts of polyoxyethylene sorbitan monooleate, 10-15 parts of sodium alkyl benzene sulfonate, 5-10 parts of alkylphenol ethoxylate, 5-10 parts of alkyl alcohol polyether ammonium sulfate, 1200-1800 parts of deionized water, 1000-1500 parts of isooctyl acrylate, 400-600 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 10-20 parts of glycidyl acrylate and 2-5 parts of potassium persulfate;
the composite filler comprises 5-10 parts of sodium carbonate, 8-12 parts of vermiculite powder, 8-15 parts of cordierite micro powder, 5-10 parts of water glass and 5-15 parts of nano white carbon black.
2. The polymer cement waterproofing coating suitable for use in low temperature environments of claim 1 wherein: the cement is portland cement or aluminate cement.
3. The polymer cement waterproofing coating suitable for use in low temperature environments of claim 1 wherein: the plasticizer is dioctyl phthalate, dioctyl adipate or epoxy octyl stearate.
4. The polymer cement waterproofing coating suitable for use in low temperature environments of claim 1 wherein: the dispersant is a polyacrylic acid sodium salt dispersant, sodium dodecyl benzene sulfonate, sodium hexametaphosphate, potassium tripolyphosphate or tetrapotassium pyrophosphate.
5. The polymer cement waterproofing coating suitable for use in low temperature environments of claim 1 wherein: the preservative is Node C15 bactericidal preservative or Daoweishi-75.
6. The polymer cement waterproofing coating suitable for use in low temperature environments of claim 1 wherein: the water reducing agent is a polycarboxylic acid type water reducing agent or a melamine water reducing agent.
7. The method for preparing a polymer cement waterproof coating material according to claim 1, wherein: the method comprises the following steps:
s1 preparation of composite emulsion
The following raw materials are taken according to parts by weight: 5-10 parts of 1,6 hexanediol diacrylate, 5-10 parts of dodecanoic acid monoethanolamide, 10-15 parts of polyoxyethylene sorbitan monooleate, 10-15 parts of sodium alkyl benzene sulfonate, 5-10 parts of alkylphenol ethoxylate, 5-10 parts of alkyl alcohol polyether ammonium sulfate, 1200-1800 parts of deionized water, 1000-1500 parts of isooctyl acrylate, 400-600 parts of 4- (N, N-dimethylamino) benzyl methacrylate, 10-20 parts of glycidyl acrylate and 2-5 parts of potassium persulfate;
taking deionized water and dodecanoic acid monoethanolamide, stirring uniformly, heating to 80-90 ℃, adding 1/3 potassium persulfate while stirring, then adding 1,6 hexanediol diacrylate, polyoxyethylene sorbitan monooleate, sodium alkyl benzene sulfonate and isooctyl acrylate, continuing stirring, cooling to 60-65 ℃, adding the rest potassium persulfate while stirring, and finally adding an alkylphenol ethoxylate, alkyl alcohol polyether ammonium sulfate, 4- (N, N-dimethylamino) benzyl methacrylate and glycidyl acrylate to prepare a composite emulsion;
s2 preparation of liquid material
The following raw materials are taken according to parts by weight: 15-30 parts of composite emulsion, 20-35 parts of plasticizer, 0.5-1 part of dispersant, 0.1-0.5 part of preservative and 8-15 parts of water;
mixing water, a dispersing agent and a preservative, uniformly stirring, then adding the composite emulsion and the plasticizer, mixing, and uniformly stirring to obtain a liquid material;
s3 preparation of powder
The following raw materials are taken according to parts by weight: 30-40 parts of cement, 15-25 parts of composite filler and 0.5-2 parts of water reducing agent, and uniformly stirring the cement, the composite filler and the water reducing agent to obtain powder.
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| CN111848197A (en) * | 2020-07-24 | 2020-10-30 | 河南凌阳耐磨材料有限公司 | High-temperature wear-resistant ceramic coating and preparation method thereof |
| CN114180907A (en) * | 2021-11-26 | 2022-03-15 | 吉林省铭嘉建筑材料有限公司 | Anti-aging environment-friendly waterproof material and processing technology |
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