CN113337196A - Water-based polyurethane waterproof coating with excellent heat insulation reflection performance and preparation method thereof - Google Patents
Water-based polyurethane waterproof coating with excellent heat insulation reflection performance 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- 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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- 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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- 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
- C09D7/65—Additives macromolecular
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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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Abstract
The invention relates to a waterborne polyurethane waterproof coating with excellent heat insulation reflection performance and a preparation method thereof, wherein the waterborne polyurethane waterproof coating is prepared from the following raw materials in parts by weight: water, aqueous polyurethane emulsion, a pH regulator, hydroxyethyl cellulose, a preservative, a wetting dispersant, a defoaming agent, titanium dioxide, hollow glass beads, barium sulfate, an antifreeze agent and a thickening agent. The tensile strength, elongation at break, low-temperature flexibility and water impermeability of the physical properties of the waterborne polyurethane waterproof coating can meet the standard of JC/T864-2008 polymer emulsion building waterproof coatings; the performances of sunlight reflectivity, near infrared reflectivity, hemisphere reflectivity, sunlight reflectivity change rate after pollution and heat insulation temperature difference of a reference blackboard all meet the functional standard of reflective heat insulation flat-coating finish paint in GB/T25261-2018 reflective heat insulation coating standard for buildings, and the performances have excellent heat insulation and reflection performances.
Description
Technical Field
The invention relates to a waterborne polyurethane waterproof coating with excellent heat insulation reflection performance and a preparation method thereof, belonging to the field of building waterproof materials.
Background
With the acceleration of urbanization process and the increasingly prominent phenomenon of insufficient energy, the heat insulation measures are required to be adopted for newly built houses since 2008 in the national regulation; in rainy seasons in southern areas of China, the requirement of building walls on waterproofing is increasingly improved, the waterproof coating is applied to color steel roofs and building outer walls more and more, but the waterproof coating is poorer in heat insulation and heat preservation of buildings, so that in order to meet the market development trend, the waterproof and weather-resistant characteristics of the waterborne polyurethane emulsion are matched by introducing special titanium white and hollow glass beads with heat insulation reflecting performance, and the waterborne polyurethane waterproof coating with excellent heat insulation reflecting performance can fill the market demand.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the waterborne polyurethane waterproof coating with excellent heat insulation reflection performance and the preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: the waterborne polyurethane waterproof coating with excellent heat insulation reflection performance is prepared from the following raw materials in parts by weight:
the preparation method of the waterborne polyurethane waterproof coating with excellent heat insulation reflection performance comprises the following steps:
adding water, the aqueous polyurethane emulsion and the PH regulator into a dispersion cylinder, controlling the rotating speed at 350-450r/min, and continuously dispersing for 5-10 min;
then adding hydroxyethyl cellulose, and continuously dispersing for 10-15min at the rotating speed of 400-450 r/min;
then adding a preservative, a wetting dispersant and a defoaming agent, and maintaining the rotating speed at 400-450r/min for dispersing for 3-5 min;
then adding titanium dioxide, adjusting the rotating speed to 500-650r/min and continuously dispersing for 15-20 min;
then, adding the hollow glass beads and barium sulfate at the rotation speed of 650r/min at 500-;
and finally, reducing the rotating speed to below 450-500r/min, adding an antifreeze agent and a thickening agent, and continuously dispersing for 10-20min until the system is a uniform and non-caking white mixture.
The water is deionized water and is used as a dispersion for dispersing the pigment and the filler and also used as a carrier for thickening the thickening agent;
the polyurethane emulsion is aromatic polycarbonate polyurethane emulsion, is a main film forming substance of the coating, provides hardness and toughness, and simultaneously provides a lasting waterpower resistance for a film forming system by a special hydrophobic structure. pH: 6.7, viscosity: 230-450 mPas, solid content: 43.5%, tensile strength: 42MPa, elongation at break: 550%, 100% modulus: 3.8 MPa.
The pH regulator adopts 2-amino-2-methyl-1-propanol, which mainly plays a role in maintaining and regulating the pH value of the whole system;
the hydroxyethyl cellulose adopts nonionic water-soluble cellulose ether, which mainly provides initial viscosity for the hydroxyethyl cellulose and provides storage stability for the later period of the coating.
The preservative is a mixture of 5-chloro-2-methyl-4-isothiazoline-3-ketone and 2-methyl-4-isothiazoline-3-ketone, and mainly plays a role in preventing corrosion and sterilizing the coating, so that the long-term storage stability of the coating is ensured.
The wetting dispersant adopts hydrophobically modified polyacrylic acid ammonium salt, mainly performs a rapid wetting effect on a coating system, and is beneficial to uniformly dispersing pigments and fillers to the system.
The foaming agent is an organic silicon and mineral oil which are matched for use, so that the generation of bubbles in the proofing process is inhibited, the surface tension of the system is changed, the generated bubbles are eliminated, and the compactness of the product system is improved.
The titanium dioxide adopts rutile type nano titanium dioxide subjected to inorganic surface treatment, so that the glossiness of the product is improved, the heat absorption of the base material is effectively reduced, and the surface temperature and the conduction of an object are reduced.
The hollow glass beads are 400-mesh white hollow glass beads, mainly play a role in heat insulation and preservation, and have low heat conductivity coefficient, so that the coating has a very good heat insulation and preservation effect; meanwhile, the special microscopic shape of the coating increases the brushing performance of the coating.
The modified barium sulfate is 1250-mesh modified barium sulfate, is mainly used as a pigment and filler, and plays roles in filling and reducing cost.
The antifreeze agent is a triphenylethylene phenol ethoxy compound, so that the storage property of the coating at low temperature is ensured.
The thickening agent is an associative thickening agent modified by hydrophobic groups. The coating material has certain leveling property, and simultaneously, the viscosity of the product is changed, so that the coating material has good application property.
Compared with the prior art, the invention has the following beneficial effects: the tensile strength, the elongation at break, the low-temperature flexibility and the water impermeability of the physical properties of the waterborne polyurethane waterproof coating can meet the standard of JC/T864-2008 polymer emulsion building waterproof coatings; the performances of sunlight reflectivity, near infrared reflectivity, hemisphere reflectivity, sunlight reflectivity change rate after pollution and heat insulation temperature difference of a reference blackboard all meet the functional standard of reflective heat insulation flat-coating finish paint in GB/T25261-2018 reflective heat insulation coating standard for buildings, and the performances have excellent heat insulation and reflection performances.
Detailed description of the preferred embodiments
The raw materials are first described as follows:
water: deionized water;
aqueous polyurethane emulsion: FS-306 aromatic polycarbonate polyurethane emulsion is developed by combining Dazhi new materials and is sold in the market;
pH regulators: adopts the modesty AMP-95 which is sold on the market;
hydroxyethyl cellulose: adopts Suanqiang 250HBR which is commercially available;
preservative: : KSG 103ST, a product of Guangdong Dimei biotechnology Co., Ltd, commercially available;
wetting and dispersing agent: mixing Rohm and Haas 731A with CA-2500 according to the mass ratio of 1:1, wherein two antifoaming agents are sold on the market;
defoaming agent: mixing Pasteur FoamStar ST 2410 with Kening 334 at a mass ratio of 1:1, wherein two antifoaming agents are commercially available;
hollow glass beads: BZ400 white hollow glass beads of science and technology Limited company in Shijiazhang are commercially available;
titanium dioxide: WTR11, a new material science and technology Limited of Wen lake Jikang, commercially available;
barium sulfate: adopts superfine modified barium sulfate CB-1250A available on the market from Shanghai Shuangrun chemical company Limited;
an antifreeze agent: FT100 high-boiling antifreeze agent of Rodiya company is adopted and is commercially available;
thickening agent: adopts Rohm and Hass RM2020 polyurethane thickening agent which is sold in the market;
the present invention will be further described with reference to the following examples.
Example 1
The method comprises the following manufacturing processes:
adding water, the aqueous polyurethane emulsion and the pH regulator into a dispersion cylinder, and continuously dispersing for 5min at the rotating speed of 350 r/min;
then adding hydroxyethyl cellulose, and continuously dispersing for 10min at the rotating speed of 400 r/min;
then adding a preservative, a wetting dispersant and a defoaming agent, and maintaining the rotating speed at 400r/min for dispersing for 3 min;
then adding titanium dioxide, adjusting the rotating speed to 500r/min and continuously dispersing for 15 min;
then, adding hollow glass beads and barium sulfate at the rotation speed of 500r/min, and continuously dispersing for 10 min;
and finally, reducing the rotating speed to below 450r/min, adding an antifreeze agent and a thickening agent, and continuously dispersing for 10min until the system is a uniform and non-caking white mixture.
Example 2
A waterborne polyurethane waterproof coating with excellent heat insulation reflection performance comprises the following specific raw materials in parts by weight:
the method comprises the following manufacturing processes:
adding water, the aqueous polyurethane emulsion and the pH regulator into a dispersion cylinder, and continuously dispersing for 10min at the rotating speed of 450 r/min;
then adding hydroxyethyl cellulose, and continuously dispersing for 15min at the rotating speed of 450 r/min;
then adding a preservative, a wetting dispersant and a defoaming agent, and maintaining the rotating speed at 450r/min for dispersing for 5 min;
then adding titanium dioxide, adjusting the rotating speed to 650r/min and continuously dispersing for 20 min;
then adding hollow glass beads and barium sulfate at the rotation speed of 650r/min, and continuously dispersing for 25 min;
and finally, reducing the rotating speed to be below 500r/min, adding an antifreeze agent and a thickening agent, and continuously dispersing for 20min until the system is a uniform and non-caking white mixture.
Example 3 (best)
Water-based polyurethane waterproof coating with excellent heat insulation reflection performance and specific raw material thereof
The material and the weight ratio are as follows:
the method comprises the following manufacturing processes:
adding water, the aqueous polyurethane emulsion and the pH regulator into a dispersion cylinder, and continuously dispersing for 8min at a rotating speed of 400 r/min;
then adding hydroxyethyl cellulose, and continuously dispersing for 12min at the rotating speed of 420 r/min;
then adding a preservative, a wetting dispersant and a defoaming agent, and maintaining the rotating speed at 420r/min for dispersing for 4 min;
then adding titanium dioxide, adjusting the rotating speed to 550r/min and continuously dispersing for 16 min;
then, adding hollow glass beads and barium sulfate at the rotation speed of 550r/min, and continuously dispersing for 20 min;
and finally, reducing the rotating speed to 480r/min, adding an antifreeze agent and a thickening agent, and continuously dispersing for 15min until the system is a uniform and non-caking white mixture.
Example 4
A waterborne polyurethane waterproof coating with excellent heat insulation reflection performance comprises the following specific raw materials in parts by weight:
the method comprises the following manufacturing processes:
adding water, the aqueous polyurethane emulsion and the pH regulator into a dispersion cylinder, and continuously dispersing for 8min at the rotating speed of 380 r/min;
then adding hydroxyethyl cellulose, and continuously dispersing for 14min at the rotating speed of 430 r/min;
then adding a preservative, a wetting dispersant and a defoaming agent, and maintaining the rotating speed at 420r/min for dispersing for 4 min;
then adding titanium dioxide, adjusting the rotating speed to 600r/min and continuously dispersing for 18 min;
then, adding hollow glass beads and barium sulfate at the rotation speed of 550r/min, and continuously dispersing for 20 min;
and finally, reducing the rotating speed to 480r/min, adding an antifreeze agent and a thickening agent, and continuously dispersing for 12min until the system is a uniform and non-caking white mixture.
The product belongs to the field of waterborne waterproof coatings, a paint film is prepared according to the JC/T864-2008 polymer emulsion building waterproof coating standard, the waterborne polyurethane waterproof coating with excellent heat insulation reflection performance is subjected to a physical performance test by the JC/T864-2008 polymer emulsion building waterproof coating, and the test result is shown in Table 1;
TABLE 1 physical Property testing
As can be seen from the table I, each scheme of the waterborne polyurethane waterproof coating with excellent heat insulation reflection performance meets the waterproof standard according to the JC/T864-2008 polymer emulsion building waterproof coating by performing physical performance tests, wherein the best is shown in example 3.
The waterborne polyurethane waterproof coating with excellent heat insulation reflection performance is mainly improved aiming at the heat insulation reflection performance of the waterproof coating, and is based on the technical scheme. The requirement test of the functionality requirement lightness value L of the reflective insulation flat coating finish in the GB/T25261-2018 reflective insulation coating standard for buildings is that the requirement test is more than 95, and the test result is shown in Table 2:
TABLE 2 reflective insulation test data
As can be seen from Table 2, the waterborne polyurethane waterproof coating with excellent heat insulation reflection performance also meets the standard requirements of GB/T25261-2018 reflective heat insulation coating for buildings in the aspect of reflective heat insulation, wherein the performance of example 3 is the best.
In conclusion, the waterproof coatings of waterborne polyurethane of the invention in the embodiments 1 to 4 have excellent heat insulation reflection performance, the physical resistance of the products meet the standard requirement of JC/T864-2008 polymer emulsion waterproof coating for building, wherein the best performance is shown in the embodiment 3; the waterborne polyurethane waterproof coating with excellent heat insulation reflection performance disclosed by the invention not only meets the waterproof property, but also meets the standard requirements of GB/T25261-2018 reflective heat insulation coatings for buildings in the aspect of heat insulation reflection, and the best embodiment 3 is provided. The waterborne polyurethane waterproof coating with excellent heat insulation reflection performance provided by the invention has the effects of reflecting sunlight and insulating heat as a waterproof coating.
The above embodiments are only some of the embodiments of the present invention, but the spirit of the present invention is not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the claims of the present invention.
Claims (8)
1. A waterborne polyurethane waterproof coating with excellent heat insulation reflection performance is characterized in that: the material is prepared from the following raw materials in parts by weight:
2. the aqueous polyurethane waterproofing paint excellent in adiabatic reflection property as set forth in claim 1, wherein: the aqueous polyurethane emulsion is aromatic polycarbonate urethane emulsion.
3. The aqueous polyurethane waterproofing paint excellent in adiabatic reflection property as set forth in claim 1, wherein: the pH regulator is 2-amino-2-methyl-1-propanol.
4. The aqueous polyurethane waterproofing paint excellent in adiabatic reflection property as set forth in claim 1, wherein: the hydroxyethyl cellulose is nonionic water-soluble cellulose ether.
5. The aqueous polyurethane waterproofing paint excellent in adiabatic reflection property as set forth in claim 1, wherein: the preservative is a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one;
the dispersing and wetting agent is a polyacrylic acid ammonium salt or sodium polyacrylate salt wetting and dispersing agent;
the defoaming agent is a mineral oil defoaming agent or an organic silicon defoaming agent.
6. The aqueous polyurethane waterproofing paint excellent in adiabatic reflection property as set forth in claim 1, wherein: the titanium dioxide is rutile type nano titanium dioxide subjected to inorganic surface treatment;
the hollow glass beads adopt borosilicate hollow vitrified beads;
the barium sulfate is modified barium sulfate.
7. The aqueous polyurethane waterproofing paint excellent in adiabatic reflection property as set forth in claim 1, wherein: the antifreeze agent adopts a glycerol ethoxylate antifreeze agent;
the thickening agent adopts associative polyurethane thickening agent.
8. The preparation method of the waterborne polyurethane waterproof coating with excellent adiabatic reflection performance, which is used for preparing any one of claims 1 to 7, is characterized by comprising the following steps:
adding water, aqueous polyurethane emulsion and a pH regulator into a dispersion cylinder, and continuously dispersing for 5-10min at the rotating speed of 350-450 r/min;
then adding hydroxyethyl cellulose, and continuously dispersing for 10-15min at the rotating speed of 400-450 r/min;
then adding a preservative, a wetting dispersant and a defoaming agent, and maintaining the rotating speed at 400-450r/min for dispersing for 3-5 min;
then adding titanium dioxide, adjusting the rotating speed to 500-650r/min and continuously dispersing for 15-20 min;
then keeping the rotation speed of 500 plus 650r/min, adding the hollow glass beads and barium sulfate, and continuously dispersing for 10-25 min;
and finally, reducing the rotating speed to below 450-500r/min, adding an antifreeze agent and a thickening agent, and continuously dispersing for 10-20min until the system is a uniform and non-caking white mixture.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114561131A (en) * | 2022-01-30 | 2022-05-31 | 漳州三德利油漆涂料有限公司 | Roof antiskid heat-insulation waterproof coating and preparation method thereof |
| CN116102962A (en) * | 2021-11-11 | 2023-05-12 | 江苏凯伦建材股份有限公司 | Water-based polyurethane waterproof coating and preparation method and application thereof |
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Application publication date: 20210903 |