CN113773731A - Tough anti-icing coating and preparation method thereof - Google Patents
Tough anti-icing coating and preparation method thereof Download PDFInfo
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- CN113773731A CN113773731A CN202111061519.7A CN202111061519A CN113773731A CN 113773731 A CN113773731 A CN 113773731A CN 202111061519 A CN202111061519 A CN 202111061519A CN 113773731 A CN113773731 A CN 113773731A
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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
- C09D175/02—Polyureas
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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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Abstract
The invention discloses a tough anti-icing coating and a preparation method thereof, relating to the field of surface anti-icing, wherein the coating is prepared from a component A and a component B according to the weight ratio of 1: 1.1-1.5 by mass; wherein the component A is a fluorine-containing aliphatic isocyanate prepolymer; the component B consists of amino-terminated polyether D2000, polyaspartic acid ester chain extender, modified graphene oxide, defoaming agent, leveling agent and ultraviolet absorber. The coating prepared by the anti-icing coating prepared by the invention has lower surface energy and excellent hydrophobicity, a proper amount of hydrophobically modified graphene oxide is added into the coating, the modified graphene oxide exists in the coating in an upright state in the curing process, the surface roughness of the coating is further improved after a plurality of friction tests, the hydrophobicity is even more excellent, and the coating has excellent durability, impact resistance and wear resistance.
Description
Technical Field
The invention relates to the field of surface anti-icing, in particular to a tough anti-icing coating and a preparation method thereof.
Background
Icing is a common natural phenomenon. Admittedly, the formation of ice brings many conveniences and entertainments to people's lives, such as food preservation, ice carving, skating, and the like. But at the same time, the icing also brings great potential safety hazards and hazards, such as circuit paralysis caused by the over-thick icing of the transmission lines of outdoor power transmission equipment, power drop and mechanical failure caused by the ice accumulation of the blades of the wind turbine, difficulty in maintaining normal flight state due to the icing of the wings of the airplane, and the like. The existing anti-icing/deicing method mainly comprises heat, machinery, ultrasonic waves, antifreeze and the like, and has the problems of high energy consumption, low efficiency, short deicing time, environmental pollution and the like.
At present, the anti-icing coating at home and abroad mainly comprises an electric heating type, a photothermal type, an ice melting type, a hydrophobic type and the like. The electrothermal anti-icing paint is limited to be used in a small range due to the difficulty in determining a reasonable current value and certain potential safety hazard; the photo-thermal anti-icing coating has harsh use conditions, poor light in rainy and snowy days and poor anti-icing effect; after the hydrophobic and ice-melting anti-icing coating works for several times, the surface structure of the coating is damaged, and the ice-melting coating is lost in a large amount, so that the anti-icing performance is greatly reduced.
Disclosure of Invention
The technical scheme solves the problems that the prior domestic and foreign anti-icing coating proposed in the background technology mainly comprises an electrothermal type, a photothermal type, an ice melting type, a hydrophobic type and the like. The electrothermal anti-icing paint is limited to be used in a small range due to the difficulty in determining a reasonable current value and certain potential safety hazard; the photo-thermal anti-icing coating has harsh use conditions, poor light in rainy and snowy days and poor anti-icing effect; and after the hydrophobic and ice-melting anti-icing coating works for several times, the surface structure of the coating is damaged, and the ice-melting coating is lost in a large amount, so that the anti-icing performance is greatly reduced.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a tough anti-icing coating is prepared from a component A and a component B according to the weight ratio of 1: 1.1-1.5 by mass;
wherein the component A is a fluorine-containing aliphatic isocyanate prepolymer;
the component B consists of amino-terminated polyether D2000, polyaspartic acid ester chain extender, modified graphene oxide, defoaming agent, leveling agent and ultraviolet absorber.
Preferably, the fluorine-containing aliphatic isocyanate prepolymer is prepared from the following components in parts by weight:
130-150 parts of isocyanate, 30-40 parts of polyol and 10-15 parts of organic fluorine modified polyol.
Preferably, the polyhydric alcohol is one of polytetrahydrofuran ether glycol, polyethylene glycol and polypropylene oxide glycol.
Preferably, the isocyanate is one or a mixture of hexamethylene diisocyanate trimer, isophorone diisocyanate, toluene diisocyanate, dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate.
A preparation method of the tough anti-icing paint is suitable for the tough anti-icing paint and comprises the following steps:
preparing organic fluorine modified polyol, polyaspartic acid ester chain extender and modified nano graphene oxide;
preparing a component A: stirring and heating 130-150 parts of isocyanate, 30-40 parts of polyol and 10-15 parts of organic fluorine modified polyol to 45-85 ℃ in a nitrogen atmosphere for reaction, stopping heating until the NCO content is 15-20%, cooling to room temperature, and sealing with N2;
preparing a component B: mixing and stirring 35-50 parts of polyaspartic acid ester chain extender and 60-100 parts of amino-terminated polyether D2000 for 2-3 hours at room temperature, adding 3-6 parts of modified nano graphene oxide, 1-5 parts of defoaming agent, 1-5 parts of flatting agent and 1-5 parts of ultraviolet absorber, ultrasonically dispersing for 5 hours, and sealing and storing N2;
mixing the AB components: mixing A, B components in a ratio of 1: 1-1.5, and uniformly mixing and stirring to obtain the product.
Optionally, the preparation method of the organic fluorine modified polyol comprises the following steps: adding 0.5mol of polyol into 100ml of absolute ethyl alcohol at room temperature, mixing and stirring for 10-20 min, adding 0.5-0.55mol of hexafluorobutyl methyl propionate, stirring for 24h, and carrying out vacuum reduced pressure distillation at 65-80 ℃ to remove redundant liquid, wherein the prepared light yellow liquid is organic fluorine modified polyol.
Optionally, the preparation method of the polyaspartic acid ester chain extender comprises the following steps: slowly and dropwise adding 1mol of N, N-diethylformamide into 0.4-0.5mol of 4, 4-diaminocyclohexylmethane at room temperature, stirring all the time, controlling the reaction temperature to be not more than 60 ℃, dropwise adding for 60 hours, stirring and heating to 60-80 ℃ after dropwise adding, reacting at constant temperature for 20-22 hours, cooling to room temperature, adding 0.045-0.05mol of bisphenol A epoxy resin, heating to 50-60 ℃ for reacting for 4 hours, heating to 150-160 ℃ after primary amine completely reacts, reacting for 4 hours, and finally distilling at 110 ℃ under reduced pressure to obtain a faint yellow liquid which is the polyaspartic acid ester chain extender.
Optionally, the preparation method of the modified nano graphene oxide comprises the following steps: placing 2g of nano graphene oxide in 50ml of absolute ethyl alcohol, dropwise adding 0.3-0.5mol of fluorosilane solution, ultrasonically dispersing for 30min, hermetically placing for 6-12 h at room temperature, and drying at 60 ℃ to obtain the modified nano graphene oxide.
Compared with the prior art, the invention has the advantages that:
1) the preparation method of the polyaspartic ester chain extender provided by the invention effectively shortens the synthesis time of the polyaspartic ester chain extender, and the addition of the polyaspartic ester chain extender prepared by the invention improves the molecular chain crosslinking degree of the coating, and can effectively improve the tensile strength and adhesive force of the coating;
2) the coating prepared by the anti-icing coating provided by the invention has lower surface energy and shows excellent hydrophobicity, a proper amount of hydrophobically modified graphene oxide is added into the coating, the modified graphene oxide exists in the coating in an upright state in the curing process, the surface roughness of the coating is further improved after a plurality of friction tests, the hydrophobicity is even more excellent, and the coating has excellent durability, impact resistance and wear resistance.
Drawings
FIG. 1 is a schematic diagram of a preparation process of the present invention;
FIG. 2 is a flow chart of the preparation of organofluorine modified polyol of the present invention;
FIG. 3 is a flow chart of the preparation of polyaspartic acid ester chain extender in the present invention;
fig. 4 is a flow chart of the preparation of the modified nano graphene oxide according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example one
Preparing organic fluorine modified polyol: adding 0.5mol of polytetrahydrofuran ether glycol into 100ml of absolute ethyl alcohol at room temperature, stirring for 15min, adding 0.5mol of hexafluorobutyl methylpropionate, stirring for 24h, and distilling under reduced pressure at 80 ℃ and 2000pa to obtain the product which is light yellow liquid.
Preparing a polyaspartic ester chain extender: slowly dripping 1mol of N, N-diethylformamide into 0.4mol of 4, 4-diaminocyclohexylmethane at room temperature, stirring all the time, controlling the reaction temperature to be not more than 60 ℃, dripping the reaction temperature for 60 hours, stirring and heating the mixture to 60 ℃ after dripping is finished, reacting at constant temperature for 22 hours, adding 0.05mol of bisphenol A epoxy resin after the temperature is reduced to room temperature, heating the mixture to 60 ℃, reacting for 4 hours, heating the mixture to 160 ℃ after primary amine is completely reacted, reacting for 4 hours, and finally distilling the mixture under reduced pressure at 110 ℃ and 2000pa to obtain the product which is light yellow liquid.
Preparing modified nano graphene oxide: adding 2g of nano graphene oxide into 50ml of ethanol solution, dropwise adding 0.5ml of fluorosilane solution, performing ultrasonic dispersion for 30min, standing at room temperature for 10h, and drying at 60 ℃ to obtain the graphene oxide nano-graphene.
Preparing a component A: 70g of hexamethylene diisocyanate trimer, 20g of polyethylene glycol and 5g of organic fluorine modified polyol are added into a four-neck flask, stirring and heating are carried out under the nitrogen atmosphere for reaction, the reaction temperature is 60 ℃, heating is stopped when the NCO content is 18%, and N2 is sealed after the NCO content is reduced to room temperature.
Preparing a component B: at room temperature, 50g of polyoxypropylene diamine polyetheramine D2000 and 20g of polyaspartic acid ester chain extender are weighed and stirred for 3 hours, 1g of modified nano graphene oxide, 0.5g of defoaming agent, 0.3g of flatting agent and 0.5g of ultraviolet absorber are added, ultrasonic dispersion is carried out for 5 hours, and the modified nano graphene oxide is obtained, and the N2 is sealed and stored.
Mixing A, B components in a ratio of 1: 1.5, and the tough anti-icing paint prepared by uniformly mixing and stirring is marked as sample one.
Example two
Preparing organic fluorine modified polyol: adding 0.5mol of polytetrahydrofuran ether glycol into 100ml of absolute ethyl alcohol at room temperature, stirring for 15min, adding 0.5mol of hexafluorobutyl methylpropionate, stirring for 24h, and distilling under reduced pressure at 80 ℃ and 2000pa to obtain the product which is light yellow liquid.
Preparing a polyaspartic ester chain extender: slowly dripping 1mol of N, N-diethylformamide into 0.4mol of 4, 4-diaminocyclohexylmethane at room temperature, stirring all the time, controlling the reaction temperature to be not more than 60 ℃, dripping the reaction temperature for 60 hours, stirring and heating the mixture to 60 ℃ after dripping is finished, reacting at constant temperature for 22 hours, adding 0.05mol of bisphenol A epoxy resin after the temperature is reduced to room temperature, heating the mixture to 60 ℃, reacting for 4 hours, heating the mixture to 160 ℃ after primary amine is completely reacted, reacting for 4 hours, and finally distilling the mixture under reduced pressure at 110 ℃ and 2000pa to obtain the product which is light yellow liquid.
Preparing modified nano graphene oxide: adding 2g of nano graphene oxide into 50ml of ethanol solution, dropwise adding 0.5ml of fluorosilane solution, performing ultrasonic dispersion for 30min, standing at room temperature for 10h, and drying at 60 ℃ to obtain the graphene oxide nano-graphene.
Preparing a component A: in a four-necked flask, 55g of hexamethylene diisocyanate trimer, 10g of isophorone diisocyanate, 16g of polyoxypropylene diol, and 7.5g of organic fluorine-modified polyol (same as in example 1) were charged, and the mixture was heated with stirring under a nitrogen atmosphere at a reaction temperature of 70 ℃ until the NCO content became 20%, and then the reaction was stopped, and cooled to room temperature, followed by sealing with N2.
Preparing a component B: weighing 45g of polyoxypropylene diamine polyetheramine D2000 and 18g of polyaspartic acid ester chain extender, stirring for 3h at room temperature, adding 2g of modified nano graphene oxide, 0.2g of defoaming agent, 0.3g of flatting agent and 0.3g of ultraviolet absorber, and performing ultrasonic dispersion for 5h to obtain the polyurethane foam material, wherein the polyurethane foam material is sealed and stored with N2.
Mixing A, B components in a ratio of 1: 1.2, and the tough anti-icing coating prepared by uniformly mixing and stirring is marked as sample II.
EXAMPLE III
Preparing organic fluorine modified polyol: 0.5mol of polyoxypropylene glycol was added to 100ml of anhydrous ethanol at room temperature, and the mixture was stirred for 15min, then 0.55mol of hexafluorobutyl methylpropionate was added, and the mixture was stirred for 24h, and distilled under reduced pressure at 65 ℃ under 2000pa to obtain a product as a pale yellow liquid.
Preparing a polyaspartic ester chain extender: slowly dripping 1mol of N, N-diethylformamide into 0.5mol of 4, 4-diaminocyclohexylmethane at room temperature, stirring all the time, controlling the reaction temperature to be not more than 60 ℃, dripping the reaction temperature for 60 hours, stirring and heating the mixture to 80 ℃ after dripping, reacting at constant temperature for 20 hours, cooling the mixture to room temperature, adding 0.045mol of bisphenol A type epoxy resin, heating the mixture to 50 ℃, reacting for 4 hours, heating the mixture to 150 ℃ after primary amine completely reacts, reacting for 4 hours, and finally distilling the mixture at 110 ℃ and 2000pa under reduced pressure to obtain a product which is a light yellow liquid.
Preparing modified nano graphene oxide: adding 2g of nano graphene oxide into 50ml of ethanol solution, dropwise adding 0.3ml of fluorosilane solution, performing ultrasonic dispersion for 30min, standing at room temperature for 10h, and drying at 60 ℃ to obtain the graphene oxide nano-graphene.
Preparing a component A: 55g of hexamethylene diisocyanate trimer, 15g of isophorone diisocyanate, 15g of polyoxypropylene glycol and 5g of organic fluorine modified polyol are added into a four-neck flask, stirring and heating are carried out under the nitrogen atmosphere, the reaction temperature is 80 ℃, heating is stopped when the NCO content is 15%, and the temperature is reduced to room temperature, and then N2 is sealed.
Preparing a component B: weighing 35g of polyoxypropylene diamine polyetheramine D2000 and 15g of polyaspartic acid ester chain extender, stirring for 3h at room temperature, adding 2g of modified nano graphene oxide, 0.3g of defoaming agent, 0.3g of flatting agent and 0.2g of ultraviolet absorber, and performing ultrasonic dispersion for 5h to obtain the polyurethane foam material, wherein the polyurethane foam material is sealed and stored with N2.
Mixing A, B components in a ratio of 1: 1.1, and stirring uniformly to obtain the tough anti-icing coating which is marked as sample three.
And (3) performance testing:
the test method of each parameter is as follows:
surface dry time test: the length of time the sample was mixed to the surface of the coating film without sticking was recorded.
And (3) testing tensile property: cutting a dumbbell I-shaped test piece meeting the GB/T528 requirement, marking parallel marked lines with the distance of 25mm, measuring the thickness of three points in the middle and two ends of the marked line of the test piece by using a thickness meter, and taking the arithmetic mean value of the thicknesses as the thickness of the test piece. Adjusting the distance between the clamps of the tensile testing machine to be about 70mm, clamping the test piece on the testing machine, keeping the center line of the test piece in the length direction and the center of the clamp of the testing machine on the same line, and stretching the test piece to be broken at the stretching speed of 500 mm/min.
And (3) testing the tearing strength: rectangular test pieces are cut according to GB/T529-1999 and tested, no notch is formed, and the tensile speed is 500 mm/min.
Ice adhesion test: the coating is sprayed on epoxy glass fiber reinforced plastic, and is placed into a low-temperature (-20 ℃) test box after being completely cured, and a drawing instrument is adopted to test the bonding strength between the ice layer and the anti-icing coating.
Water absorption test: putting the epoxy glass fiber reinforced plastic test piece into an oven with the temperature of 50 ℃ 2 to dry for 4h 15min, then cooling to room temperature in a drier, weighing each test piece to be accurate to 1mg, putting the test piece into a container filled with distilled water, and controlling the water temperature to be 23 ℃ 2. After soaking for 7d, the samples were taken out, the surface water was quickly wiped off with filter paper, and each sample was weighed. The sample is taken out of the water and weighing is completed within 1 min.
Adhesion force: the adhesion strength between the anti-icing coating and the substrate (45 steel) was tested using a drawbench at room temperature.
Water contact angle test: and testing by using a contact angle measuring instrument.
The performance test results are as follows:
test items | Sample No | Sample No. 2 | Sample No. three |
Surface dry time/s | 90 | 45 | 60 |
Tensile strength/MPa | 12.3 | 13.5 | 15 |
Tear Strength/(N/mm) | 83 | 78 | 80 |
Ice adhesion strength/MPa | 0.006 | 0.0047 | 0.0035 |
Water absorption/%) | 1 | 0.8 | 1 |
adhesion/MPa | 21 | 19 | 20 |
Water contact angle/° c | 113 | 120 | 126 |
From the above table it can be seen that: the coating prepared by the anti-icing coating prepared by the invention has lower surface energy and excellent hydrophobicity, a proper amount of hydrophobically modified graphene oxide is added into the coating, the modified graphene oxide exists in the coating in an upright state in the curing process, the surface roughness of the coating is further improved after a plurality of friction tests, the hydrophobicity is even more excellent, and the coating has excellent durability, impact resistance and wear resistance.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The tough anti-icing coating is characterized by comprising a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight of 1: 1.1-1.5 by mass;
wherein the component A is a fluorine-containing aliphatic isocyanate prepolymer;
the component B consists of amino-terminated polyether D2000, polyaspartic acid ester chain extender, modified graphene oxide, defoaming agent, leveling agent and ultraviolet absorber.
2. The tough anti-icing coating as claimed in claim 1, wherein the fluorine-containing aliphatic isocyanate prepolymer is prepared from the following components in parts by weight:
130-150 parts of isocyanate, 30-40 parts of polyol and 10-15 parts of organic fluorine modified polyol.
3. The tough anti-icing coating according to claim 2, wherein the polyol is one of polytetrahydrofuran ether glycol, polyethylene glycol and polypropylene oxide glycol.
4. The tough anti-icing coating according to claim 1, wherein the isocyanate is one or a mixture of hexamethylene diisocyanate trimer, isophorone diisocyanate, toluene diisocyanate, dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate.
5. A preparation method of the tough anti-icing paint, which is suitable for the tough anti-icing paint as claimed in claims 1 to 4, is characterized by comprising the following steps:
preparing organic fluorine modified polyol, polyaspartic acid ester chain extender and modified nano graphene oxide;
preparing a component A: stirring and heating 130-150 parts of isocyanate, 30-40 parts of polyol and 10-15 parts of organic fluorine modified polyol to 45-85 ℃ in a nitrogen atmosphere for reaction, stopping heating until the NCO content is 15-20%, cooling to room temperature, and sealing with N2;
preparing a component B: mixing and stirring 35-50 parts of polyaspartic acid ester chain extender and 60-100 parts of amino-terminated polyether D2000 for 2-3 hours at room temperature, adding 3-6 parts of modified nano graphene oxide, 1-5 parts of defoaming agent, 1-5 parts of flatting agent and 1-5 parts of ultraviolet absorber, ultrasonically dispersing for 5 hours, and sealing and storing N2;
mixing the AB components: mixing A, B components in a ratio of 1: 1-1.5, and uniformly mixing and stirring to obtain the product.
6. The preparation method of the tough anti-icing coating as claimed in claim 5, wherein the preparation method of the organic fluorine modified polyol comprises the following steps: adding 0.5mol of polyol into 100ml of absolute ethyl alcohol at room temperature, mixing and stirring for 10-20 min, adding 0.5-0.55mol of hexafluorobutyl methyl propionate, stirring for 24h, and carrying out vacuum reduced pressure distillation at 65-80 ℃ to remove redundant liquid, wherein the prepared light yellow liquid is organic fluorine modified polyol.
7. The preparation method of the tough anti-icing coating as claimed in claim 5, wherein the preparation method of the polyaspartate chain extender comprises the following steps: slowly and dropwise adding 1mol of N, N-diethylformamide into 0.4-0.5mol of 4, 4-diaminocyclohexylmethane at room temperature, stirring all the time, controlling the reaction temperature to be not more than 60 ℃, dropwise adding for 60 hours, stirring and heating to 60-80 ℃ after dropwise adding, reacting at constant temperature for 20-22 hours, cooling to room temperature, adding 0.045-0.05mol of bisphenol A epoxy resin, heating to 50-60 ℃ for reacting for 4 hours, heating to 150-160 ℃ after primary amine completely reacts, reacting for 4 hours, and finally distilling at 110 ℃ under reduced pressure to obtain a faint yellow liquid which is the polyaspartic acid ester chain extender.
8. The preparation method of the tough anti-icing coating according to claim 5, wherein the preparation method of the modified nano graphene oxide comprises the following steps: placing 2g of nano graphene oxide in 50ml of absolute ethyl alcohol, dropwise adding 0.3-0.5mol of fluorosilane solution, ultrasonically dispersing for 30min, hermetically placing for 6-12 h at room temperature, and drying at 60 ℃ to obtain the modified nano graphene oxide.
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CN111875320A (en) * | 2020-08-19 | 2020-11-03 | 济南大学 | Super-hydrophobic microcapsule polymer cement-based anticorrosive paint and preparation method and application thereof |
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CN106010175A (en) * | 2016-07-05 | 2016-10-12 | 江苏苏博特新材料股份有限公司 | Preparing method and application of anti-freezing type bi-component polyurea waterproof paint for bridges |
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Application publication date: 20211210 |