CN113045943A - Roof waterproof paint resisting extremely low temperature bending and preparation method thereof - Google Patents
Roof waterproof paint resisting extremely low temperature bending and preparation method thereof Download PDFInfo
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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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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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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
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K2003/2241—Titanium dioxide
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Abstract
The invention relates to a roof waterproof coating resistant to extremely low temperature bending and a preparation method thereof, and the roof waterproof coating is mainly prepared from the following components in parts by weight:
Description
Technical Field
The invention relates to a roof waterproof coating resistant to extremely low temperature bending and a preparation method thereof, and is applied to the field of building coatings.
Background
Most of the existing waterproof coatings on the market have poor performance of raw material emulsion, so that the surfaces of paint films of the waterproof coatings are sticky and easy to be dusty, and the stain resistance is poor. In addition, although the waterproof coating has certain waterproof performance, the waterproof coating has single function, does not have heat reflection and heat insulation performance and extremely low temperature bending resistance, and is easy to break under the environment of extremely low temperature of minus 30 ℃. Therefore, it is desirable to provide a roof waterproof coating with good waterproof performance, excellent stain resistance, excellent resistance to cracking due to extreme low temperature bending, and excellent heat reflection and heat insulation performance, and a preparation method thereof.
Disclosure of Invention
In order to overcome the defects that the performance of raw material emulsion used by the existing waterproof coating is poor, so that the waterproof performance and the stain resistance of the coating are poor, and the coating does not have the extremely low temperature bending resistance, the invention provides the extremely low temperature bending resistance roof waterproof coating and the preparation method thereof, the waterproof performance and the stain resistance of the coating are greatly improved by adopting the low temperature resistance emulsion and the nano barium sulfate in the optimal proportion and under the matching of the optimal other components and the dosage proportion thereof, and the extremely low temperature (-30 ℃) bending resistance is good.
The technical scheme of the invention is as follows:
the extremely low-temperature bending resistant roof waterproof coating is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The utility model provides a roofing waterproof coating that extremely low temperature of resistant extremely low temperature is buckled has adopted low temperature resistant emulsion and nanometer barium sulfate, preferred low temperature resistant emulsion is according to moisture curing, collocates the high oil absorption of nanometer barium sulfate to the preferred quantity proportion of configuration, through low temperature resistant emulsion and nanometer barium sulfate interact, other components of preferred and quantity proportion on the complex, lead to the pvc performance of product to improve, thereby make roofing waterproof coating that extremely low temperature is buckled resistant is good, the stain resistance can be promoted by a wide margin, and its low water absorption rate after the membrane forming is < 15%. In addition, the coating has good extreme low temperature bending resistance, the coating does not crack when bent under the environment of extremely low temperature of minus 30 ℃, the tensile strength and the elongation at break are excellent and can respectively reach more than 1.5MPa and more than 170 percent, and the coating also has excellent adhesiveness, weather resistance, water resistance and air permeability. Wherein, the low temperature resistant emulsion is pure acrylic emulsion, and is a high molecular emulsion which is copolymerized by taking modified extremely low temperature resistant acrylic monomer as a basic raw material and other auxiliary materials through an emulsion polymerization method. The nano barium sulfate is a filler in a product, can enable the product to resist acid treatment and have high retention rate of water treatment resistance, has the advantages of strong chemical inertia, good stability, acid and alkali resistance, moderate hardness, high specific gravity, high whiteness, capability of absorbing harmful rays and the like, is a material with an environment-friendly function, and is widely applied to various coatings. The hydroxyethyl cellulose is prepared by etherification reaction of alkali cellulose and ethylene oxide (or chloroethanol), belongs to nonionic soluble cellulose ether, and has the characteristics of good thickening, suspension, dispersion, emulsification, adhesion, film formation, moisture protection, protective colloid supply and the like. The film-forming assistant can promote the plastic flow and elastic deformation of the high molecular compound, improve the coalescence performance, form a film in a wider construction temperature range, ensure that the film formed by the product is more stable and does not crack, and is an easy-to-disappear plasticizer. The polyurethane thickener is an auxiliary agent for increasing the viscosity and the fluidity of a finished product in the coating.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The tg value of the preferred low temperature resistant emulsion can reach-40 ℃.
The mesh number of the nano barium sulfate is 1250-2000 meshes.
The coating product prepared by the nano barium sulfate with the preferred mesh number has fine and smooth state and excellent appearance state.
The roof waterproof coating resisting extremely low temperature bending also comprises 3-7 parts of heat reflection titanium dioxide, and the sunlight reflectivity of the heat reflection titanium dioxide is more than 0.8.
The heat-reflection titanium dioxide is an important inorganic chemical pigment, the main component is titanium dioxide with higher reflectivity and the performance of high sunlight reflectivity, so that the titanium dioxide has the heat-reflection heat-insulation performance, and when the titanium dioxide is used for an exposed roof waterproof coating, the roof waterproof coating has the functions of heat reflection heat insulation and high heat resistance, is low-carbon, environment-friendly and energy-saving, is a bright spot in the market, can attract numerous customers and open the market. The heat reflection titanium dioxide is preferably AL550 of Hensmei company, the particle size is small, the visible light wave band is controlled at 300nm, so that the ultraviolet light absorbed by the heat reflection titanium dioxide is less, and the reflection heat insulation effect is better.
The dispersing agent is one or any combination of two of sodium salt dispersing agent and ammonium salt dispersing agent.
Preferred dispersants are common and readily available.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The preferred preservative has good preservative function, and also has bactericidal function, so that the coating is protected for a longer time. Furthermore, the preferable mass percentage of isothiazolinone derivatives, benzisoxazole esters and 1, 2-benzisothiazolin-3-one in the preservative is 1:1:2, so that the preservative effect is better.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preferred coalescents are common and readily available.
The defoaming agent is one or any combination of mineral oil defoaming agent and organic silicon defoaming agent.
The silicone defoaming agent has the function of eliminating foams formed by materials in the production process, and mainly comprises a silicone oil and a silicone component, wherein the silicone oil is a nonvolatile oily liquid at normal temperature, is insoluble or has low solubility in water, animal and vegetable oil and mineral oil, and can resist high temperature and low temperature. The mineral oil defoaming agent has a defoaming function, and the organic silicon defoaming agent has hydrophobic and hydrophobic effects, and is matched with each other, so that the defoaming effect is better.
The film-forming assistant is one of decaglycol ester, propylene glycol butyl ether or propylene glycol methyl ether acetate.
The low price of the preferred dodecanol ester makes the product price of the coating advantageous.
The preparation method of the extremely low temperature bending resistant roof waterproof coating mainly comprises the following steps of:
(1) putting the low-temperature-resistant emulsion accounting for 30-40% of the total weight of the low-temperature-resistant emulsion into a stirrer, starting the stirrer, adjusting the stirring speed to 600-700r/min, adding water accounting for 55-65% of the total weight of the low-temperature-resistant emulsion into the stirrer, and adding hydroxyethyl cellulose for mixing for at least 2 min;
(2) keeping the stirring rotation speed of 600-700r/min, adding a defoaming agent accounting for 33.33-54.55 percent of the total weight of the defoaming agent into the mixture obtained in the step (1) for mixing for at least 1min, and then adding the rest defoaming agent into the mixture for mixing for at least 2 min;
(3) keeping the stirring rotation speed of 600-700r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring rotation speed of 600-700r/min, adding nano barium sulfate into the mixture obtained in the step (3), and stirring for 15-20 min;
(5) keeping the stirring rotation speed of 600-700r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 2-5 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 400-one and 500r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for at least 5min to obtain the extremely low temperature bending resistant roof waterproof coating.
The preparation method of the extremely low temperature bending resistant roof waterproof coating is simple and rapid in steps and convenient to operate.
And (4) adding the heat reflection titanium dioxide when adding the nano barium sulfate in the step (4).
The addition of the heat reflection titanium dioxide enables the roof waterproof coating resistant to extremely low temperature bending to have good heat reflection and heat insulation performance.
Compared with the prior art, the method has the following advantages:
1) the extremely low temperature bending resistant roof waterproof coating adopts low temperature resistant emulsion and nano barium sulfate, and the prepared optimal dosage proportion, and through the mutual reaction of the low temperature resistant emulsion and the nano barium sulfate, the optimal other components and dosage proportion are compounded, so that the extremely low temperature bending resistant roof waterproof coating has good waterproof performance, greatly improved stain resistance, good extremely low temperature bending resistance, and no cracking of a coating layer after being bent at the extremely low temperature of-30 ℃;
2) due to the addition of the heat-reflecting titanium dioxide, the extremely low-temperature bending resistant roof waterproof coating has the heat-reflecting and heat-insulating properties, is low-carbon, environment-friendly and energy-saving;
3) the preparation method of the extremely low temperature bending resistant roof waterproof coating is simple and rapid in steps and convenient to operate.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the embodiments of the specification.
Example 1
The invention relates to an extremely low temperature bending resistant roof waterproof coating which is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The mesh number of the nano barium sulfate is 1800 meshes.
The solar light reflectivity of the heat reflection titanium dioxide is more than 0.8.
The dispersing agent is a sodium salt dispersing agent.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preparation method of the extremely low temperature bending resistant roof waterproof coating mainly comprises the following steps of:
(1) putting the low-temperature-resistant emulsion accounting for 30 percent of the total weight of the emulsion into a stirrer, starting the stirrer, regulating the stirring speed to 650r/min, adding water accounting for 60 percent of the total weight of the emulsion into the stirrer, and adding hydroxyethyl cellulose to mix for 2 min;
(2) keeping the stirring speed at 650r/min, adding a mineral oil defoaming agent into the mixture obtained in the step (1) for mixing, adding an organic silicon defoaming agent after 1min, and mixing for 2 min;
(3) keeping the stirring speed at 650r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring speed at 650r/min, adding the heat reflection titanium dioxide and the nano barium sulfate into the mixture obtained in the step (3), and stirring for 18 min;
(5) keeping the stirring speed at 650r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 4 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 450r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for 5min to obtain the extremely low temperature bending resistant roof waterproof coating.
Example 2
The invention relates to an extremely low temperature bending resistant roof waterproof coating which is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The mesh number of the nano barium sulfate is 1250 meshes.
The solar light reflectivity of the heat reflection titanium dioxide is more than 0.8.
The dispersant is an ammonium salt dispersant.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preparation method of the extremely low temperature bending resistant roof waterproof coating mainly comprises the following steps of:
(1) putting the low-temperature-resistant emulsion accounting for 38 percent of the total weight of the low-temperature-resistant emulsion into a stirrer, starting the stirrer, regulating the stirring speed to 600r/min, adding water accounting for 55 percent of the total weight of the low-temperature-resistant emulsion into the stirrer, and then adding hydroxyethyl cellulose to mix for 3 min;
(2) keeping the stirring speed at 600r/min, adding a mineral oil defoaming agent into the mixture obtained in the step (1), mixing for 3min, then adding an organic silicon defoaming agent into the mixture, and mixing for 6 min;
(3) keeping the stirring speed at 600r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring speed at 600r/min, adding the heat reflection titanium dioxide and the nano barium sulfate into the mixture obtained in the step (3), and stirring for 15 min;
(5) keeping the stirring speed at 600r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 2 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 400r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for 8min to obtain the extremely low temperature bending resistant roof waterproof coating.
Example 3
The invention relates to an extremely low temperature bending resistant roof waterproof coating which is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The mesh number of the nano barium sulfate is 2000 meshes.
The solar light reflectivity of the heat reflection titanium dioxide is more than 0.8.
The dispersing agent is any combination of sodium salt dispersing agent and ammonium salt dispersing agent.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preparation method of the extremely low temperature bending resistant roof waterproof coating mainly comprises the following steps of:
(1) putting the low-temperature-resistant emulsion accounting for 40 percent of the total weight of the low-temperature-resistant emulsion into a stirrer, starting the stirrer, regulating the stirring speed to 700r/min, adding water accounting for 65 percent of the total weight of the low-temperature-resistant emulsion into the stirrer, and then adding hydroxyethyl cellulose to mix for 5 min;
(2) keeping the stirring speed at 700r/min, adding a mineral oil defoaming agent into the mixture obtained in the step (1), mixing for 3min, then adding an organic silicon defoaming agent into the mixture, and mixing for 5 min;
(3) keeping the stirring speed at 700r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring speed at 700r/min, adding the heat reflection titanium dioxide and the nano barium sulfate into the mixture obtained in the step (3), and stirring for 20 min;
(5) keeping the stirring speed at 700r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 5 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 500r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for 10min to obtain the extremely low temperature bending resistant roof waterproof coating.
Example 4
The invention relates to an extremely low temperature bending resistant roof waterproof coating which is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The mesh number of the nano barium sulfate is 1400 meshes.
The solar light reflectivity of the heat reflection titanium dioxide is more than 0.8.
The dispersing agent is a sodium salt dispersing agent.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preparation method of the extremely low temperature bending resistant roof waterproof coating mainly comprises the following steps of:
(1) putting the low-temperature-resistant emulsion accounting for 30 percent of the total weight of the emulsion into a stirrer, starting the stirrer, regulating the stirring speed to 650r/min, adding water accounting for 60 percent of the total weight of the emulsion into the stirrer, and adding hydroxyethyl cellulose to mix for 3 min;
(2) keeping the stirring speed at 650r/min, adding a mineral oil defoaming agent into the mixture obtained in the step (1), mixing for 3min, then adding an organic silicon defoaming agent into the mixture, and mixing for 2 min;
(3) keeping the stirring speed at 650r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring speed at 650r/min, adding the heat reflection titanium dioxide and the nano barium sulfate into the mixture obtained in the step (3), and stirring for 18 min;
(5) keeping the stirring speed at 650r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 3 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 450r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for 8min to obtain the extremely low temperature bending resistant roof waterproof coating.
Example 5
The invention relates to an extremely low temperature bending resistant roof waterproof coating which is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The mesh number of the nano barium sulfate is 1250 meshes.
The dispersant is an ammonium salt dispersant.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preparation method of the extremely low temperature bending resistant roof waterproof coating is characterized by comprising the following steps of: mainly comprises the following steps which are carried out in sequence:
(1) putting the low-temperature-resistant emulsion accounting for 36 percent of the total weight of the emulsion into a stirrer, starting the stirrer, regulating the stirring speed to 650r/min, adding water accounting for 60 percent of the total weight of the emulsion into the stirrer, and adding hydroxyethyl cellulose to mix for 2 min;
(2) keeping the stirring speed at 650r/min, adding a mineral oil defoaming agent into the mixture obtained in the step (1), mixing for 1min, then adding an organic silicon defoaming agent into the mixture, and mixing for 2 min;
(3) keeping the stirring speed at 650r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring speed at 650r/min, adding nano barium sulfate into the mixture obtained in the step (3), and stirring for 18 min;
(5) keeping the stirring speed at 650r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 3 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 450r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for 5min to obtain the extremely low temperature bending resistant roof waterproof coating.
Example 6
The invention relates to an extremely low temperature bending resistant roof waterproof coating which is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The mesh number of the nano barium sulfate is 1250 meshes.
The dispersant is an ammonium salt dispersant.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preparation method of the extremely low temperature bending resistant roof waterproof coating is characterized by comprising the following steps of: mainly comprises the following steps which are carried out in sequence:
(1) putting the low-temperature-resistant emulsion accounting for 36 percent of the total weight of the emulsion into a stirrer, starting the stirrer, regulating the stirring speed to 680r/min, adding water accounting for 60 percent of the total weight of the emulsion into the stirrer, and then adding hydroxyethyl cellulose to mix for 2 min;
(2) keeping the stirring rotation speed at 680r/min, adding a defoaming agent accounting for 40 percent of the total weight of the defoaming agent into the mixture obtained in the step (1), mixing for 1min, then adding the rest defoaming agent into the mixture, and mixing for 2 min;
(3) keeping the stirring rotation speed at 680r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring rotation speed at 680r/min, adding nano barium sulfate into the mixture obtained in the step (3), and stirring for 18 min;
(5) keeping the stirring rotation speed at 680r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 3 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 400r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for 5min to obtain the extremely low temperature bending resistant roof waterproof coating.
Example 7
The invention relates to an extremely low temperature bending resistant roof waterproof coating which is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
The low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
The mesh number of the nano barium sulfate is 1250 meshes.
The dispersing agent is a sodium salt dispersing agent.
The preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
The film-forming auxiliary agent is an ether alcohol high polymer.
The preparation method of the extremely low temperature bending resistant roof waterproof coating is characterized by comprising the following steps of: mainly comprises the following steps which are carried out in sequence:
(1) putting the low-temperature-resistant emulsion accounting for 30 percent of the total weight of the emulsion into a stirrer, starting the stirrer, regulating the stirring speed to 700r/min, adding water accounting for 55 percent of the total weight of the emulsion into the stirrer, and adding hydroxyethyl cellulose to mix for 3 min;
(2) keeping the stirring speed at 700r/min, adding a defoaming agent accounting for 33.33 percent of the total weight of the defoaming agent into the mixture obtained in the step (1), mixing for 3min, then adding the rest defoaming agent into the mixture, and mixing for 3 min;
(3) keeping the stirring speed at 700r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring speed at 700r/min, adding nano barium sulfate into the mixture obtained in the step (3), and stirring for 18 min;
(5) keeping the stirring speed at 700r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 4 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 500r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for 10min to obtain the extremely low temperature bending resistant roof waterproof coating.
The sources of the raw materials referred to in the above examples:
low temperature resistant emulsion: 1791 from Dow;
preservative: R-S by Thor;
dispersing agent: kekai corporation NS-95
And (3) organic silicon defoaming agent: corning incorporated 334-;
mineral oil defoamer: corning NXZ;
hydroxyethyl cellulose: 250HBR (high environmental protection type) by sub-span long company;
heat reflection titanium dioxide: AL550 by hensmy corporation;
nano barium sulfate: double-moistening chemical 1250-mesh barium sulfate;
film-forming auxiliary agent: ismann texnol;
polyurethane thickener: rohm and Hass R8W.
Experimental data:
the test method comprises the following steps: each performance test was performed with reference to JG/T375-.
Table 1: results of testing the Properties of the respective paint films
The extremely low-temperature bending resistant roof waterproof coating has the following advantages:
1. excellent stain resistance;
2. excellent tensile strength and elongation at break, which can reach more than 1.5MPa and more than 170 percent;
3. excellent adhesion, peel adhesion greater than 0.3N/mm;
4. excellent weather resistance, high retention after heat treatment, water treatment and acid treatment;
5. excellent water and air permeability, low water absorption;
6. the coating is not cracked when being bent under the environment of extremely low temperature of minus 30 ℃;
7. good heat reflection and heat insulation performance, and the sunlight reflectivity is more than or equal to 0.8.
The roofing waterproof paint resisting extreme low temperature bending and the preparation method thereof are not limited to the above embodiments, and any modification or replacement according to the principle of the invention should be within the protection scope of the invention.
Claims (10)
1. The extremely low temperature bending resistant roof waterproof coating is characterized in that: the adhesive is mainly prepared from the following components in parts by weight:
the low-temperature resistant emulsion is pure acrylic emulsion.
2. The extremely low temperature bending resistant roof waterproof coating according to claim 1, characterized in that: the low-temperature resistant emulsion is a Dow 1791 low-temperature resistant emulsion.
3. The extremely low temperature bending resistant roof waterproof coating according to claim 1, characterized in that: the mesh number of the nano barium sulfate is 1250-2000 meshes.
4. The extremely low temperature bending resistant roof waterproof coating according to claim 1, characterized in that: the roof waterproof coating resisting extremely low temperature bending also comprises 3-7 parts of heat reflection titanium dioxide, and the sunlight reflectivity of the heat reflection titanium dioxide is more than 0.8.
5. The extremely low temperature bending resistant roof waterproof coating according to claim 1, characterized in that: the dispersing agent is one or any combination of two of sodium salt dispersing agent and ammonium salt dispersing agent.
6. The extremely low temperature bending resistant roof waterproof coating according to claim 1, characterized in that: the preservative is a compound mixing agent, and the preservative contains isothiazolinone derivatives, benzomicazoles esters and 1, 2-benzisothiazolin-3-one.
7. The extremely low temperature bending resistant roof waterproof coating according to claim 1, characterized in that: the film-forming auxiliary agent is an ether alcohol high polymer.
8. The extremely low temperature bending resistant roof waterproof coating according to claim 1, characterized in that: the defoaming agent is one or any combination of mineral oil defoaming agent and organic silicon defoaming agent.
9. The method for preparing the extremely low temperature bending resistant roof waterproof coating according to any one of claims 1 to 8, characterized in that: mainly comprises the following steps which are carried out in sequence:
(1) putting the low-temperature-resistant emulsion accounting for 30-40% of the total weight of the low-temperature-resistant emulsion into a stirrer, starting the stirrer, adjusting the stirring speed to 600-700r/min, adding water accounting for 55-65% of the total weight of the low-temperature-resistant emulsion into the stirrer, and adding hydroxyethyl cellulose for mixing for at least 2 min;
(2) keeping the stirring rotation speed of 600-700r/min, adding a defoaming agent accounting for 33.33-54.55 percent of the total weight of the defoaming agent into the mixture obtained in the step (1) for mixing for at least 1min, and then adding the rest defoaming agent into the mixture for mixing for at least 2 min;
(3) keeping the stirring rotation speed of 600-700r/min, adding a dispersing agent and a preservative into the mixture obtained in the step (2), and uniformly mixing;
(4) keeping the stirring rotation speed of 600-700r/min, adding nano barium sulfate into the mixture obtained in the step (3), and stirring for 15-20 min;
(5) keeping the stirring rotation speed of 600-700r/min, adding the film-forming aid into the mixture obtained in the step (4), and stirring for 2-5 min;
(6) and (3) dropping the polyurethane thickener into the rest water for dilution, adjusting the stirring rotating speed in the step (5) to be reduced to 400-one and 500r/min, adding the diluted polyurethane thickener into the mixture obtained in the step (5), and mixing for at least 5min to obtain the extremely low temperature bending resistant roof waterproof coating.
10. The preparation method of the extremely low temperature bending resistant roof waterproof coating according to claim 9, characterized by comprising the following steps: and (4) adding the heat reflection titanium dioxide when adding the nano barium sulfate in the step (4).
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