CN114479637A - Water-based high-weather-resistance elastic coating and preparation method thereof - Google Patents
Water-based high-weather-resistance elastic coating and preparation method thereof Download PDFInfo
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- CN114479637A CN114479637A CN202210202062.5A CN202210202062A CN114479637A CN 114479637 A CN114479637 A CN 114479637A CN 202210202062 A CN202210202062 A CN 202210202062A CN 114479637 A CN114479637 A CN 114479637A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 239000011248 coating agent Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 51
- 239000002270 dispersing agent Substances 0.000 claims description 25
- 239000008367 deionised water Substances 0.000 claims description 24
- 229910021641 deionized water Inorganic materials 0.000 claims description 24
- 239000013008 thixotropic agent Substances 0.000 claims description 23
- 239000012752 auxiliary agent Substances 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 9
- 239000003973 paint Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 235000011194 food seasoning agent Nutrition 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 9
- 239000002253 acid Substances 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 2
- 230000036541 health Effects 0.000 abstract description 2
- 239000002390 adhesive tape Substances 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 description 13
- 239000004814 polyurethane Substances 0.000 description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 7
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 239000012948 isocyanate Substances 0.000 description 5
- 150000002513 isocyanates Chemical class 0.000 description 5
- 125000003158 alcohol group Chemical group 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 150000003673 urethanes Chemical class 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C09D7/20—Diluents or solvents
Abstract
The invention discloses a water-based high weather-resistant elastic coating and a preparation method thereof, wherein the coating comprises the following components in parts by mass: aqueous silicon modified polyurethane resin: 35-55 parts of a solvent; aqueous latent curing agent: 2-4 parts. The novel adhesive tape has the advantages of safety in use, environmental protection, health, convenience and rapidness in construction, simplicity in operation, and excellent elasticity, adhesive force, acid and alkali resistance and aging resistance.
Description
Technical Field
The invention relates to a water-based high weather-resistant elastic coating and a preparation method thereof, belongs to the field of chemical coatings, and is used for protection and decoration of high-elastomer materials.
Background
At present, the existing elastomer protection and decoration coatings are mainly oily two-component coatings, and a small amount of single-component water-based acrylic acid and single-component polyurethane materials exist. The oily double-component material has the advantages of high toxicity, high taste, unsafe use and complex operation. A large amount of volatile organic compounds contained in the traditional solvent-based paint not only can cause serious pollution to the atmosphere, but also can seriously affect the health of human beings. Today, environmental awareness is increasing, and environmental friendly coatings are increasingly showing their importance. With the enhancement of environmental protection consciousness of people, high-efficiency water-based paint without organic solvent or low-volatility organic compound is developed successively, and the research of green paint brings huge economic and social benefits. Since the 80 s of the 2O century, the restriction on the use of organic solvents has attracted attention from various countries due to the stricter requirements of governments around the world on environmental protection and labor protection. The U.S. 1113 regulation states: the VOC content of industrial coatings has been reduced from 420g/L in 1990 to 340g/L in 1993 and to below 250g/L in 2000. Therefore, development and production of low-pollution coatings and environment-friendly coatings are more and more generally regarded as important, wherein research and development of water-based coatings are greatly concerned, and the water-based product coatings cannot be well popularized in elastomer materials due to the factors of poor elasticity and poor adhesion of water-based acrylic acid, poor chemical resistance of common polyurethane and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the water-based high-weather-resistance elastic coating which is safe to use, environment-friendly, healthy, convenient and quick to construct, simple to operate, and excellent in elasticity, adhesive force, acid and alkali resistance and aging resistance.
In order to solve the technical problems, the technical scheme of the invention is as follows: the water-based high-weather-resistance elastic coating comprises the following components in parts by mass:
aqueous silicon-modified polyurethane resin: 35-55 parts of a solvent;
aqueous latent curing agent: 2-4 parts.
Furthermore, the coating also contains an auxiliary agent.
Further, the auxiliary agent comprises a thixotropic agent and a film-forming auxiliary agent.
Furthermore, the coating also contains water-based color paste.
Further, the water-based color paste comprises a color filler.
Further, the water-based color paste also contains deionized water and a dispersing agent.
Further, the coating also comprises the following components in parts by mass:
water-based color paste: 15-36 parts of color seasoning; dispersing agent: 1-2 parts of deionized water: 5 to 20 portions.
Thixotropic agent: 1.5 to 4.5 parts by weight,
film-forming auxiliary agent: 4-10 parts.
The invention also provides a preparation method of the water-based high weather-resistant elastic coating, which comprises the following steps:
and (2) mixing and uniformly stirring the aqueous silicon modified polyurethane resin and the aqueous latent curing agent in corresponding parts by mass, adding the thixotropic agent in corresponding parts by mass, stirring again, adding the film-forming aid in corresponding parts by mass after the viscosity is stable, stirring, and finally adding the aqueous color paste for stirring to obtain a finished product.
And further, mixing and uniformly stirring the deionized water, the dispersing agent and the color filler in corresponding parts by mass, then dispersing, and grinding to the required fineness to obtain the water-based color paste.
Further, the temperature is controlled to be less than or equal to 60 ℃ in the whole stirring process.
After the technical scheme is adopted, the water-based high-weather-resistance elastic coating disclosed by the invention is mainly characterized in that two special materials, namely a water-based latent curing agent and a water-based silicon modified polyurethane resin are used, and the performance of the coating after film forming is more excellent by utilizing the mutual reaction of a special NCO group in the water-based latent curing agent and an OH group in the water-based silicon modified polyurethane resin. The water resistance, acid resistance and alkali resistance of the paint are improved by utilizing the principle that the water-based latent curing agent reacts with a reactive group, and meanwhile, the water-based silicon modified polyurethane resin has high weather resistance, excellent adhesive force, excellent paint film extensibility and elasticity. The waterborne latent curing agent does not have any reaction capability in water through a special end capping technology, and the mixed components have longer storage stability, so that the defect that the two-component coating and the curing agent are completely used up in the service life after being mixed is overcome. The water-based silicon modified polyurethane resin has strong dehydration speed capability after coating construction, can discharge water into the air in a short time, and the water-based latent curing agent and the water-based silicon modified polyurethane resin can quickly react, so that the water-based silicon modified polyurethane resin also has better drying speed. The water-based high weather-resistant elastic coating is a water-based system, has no toxic or harmful solvent, has low VOC, is environment-friendly and safe; the construction is simple, quick and convenient; the paint film has special functional groups and reactive groups, and has high weather resistance, acid and alkali resistance, good adhesive force, excellent paint film extensibility and elasticity.
Detailed Description
The invention provides a water-based high weather-resistant elastic coating and a preparation method thereof, and a person skilled in the art can use the contents for reference and appropriately improve process parameters to realize the purpose. It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the scope of the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.
The water-based high-weather-resistance elastic coating comprises the following components in parts by mass:
aqueous silicon-modified polyurethane resin: 35-55 parts of a solvent;
aqueous latent curing agent: 2-4 parts.
Furthermore, the coating also contains an auxiliary agent.
Further, the auxiliary agent comprises a thixotropic agent and a film-forming auxiliary agent.
Furthermore, the coating also contains water-based color paste.
Further, the water-based color paste comprises a color filler.
Further, the water-based color paste also contains deionized water and a dispersing agent.
Further, the coating also comprises the following components in parts by mass:
water-based color paste: 15-36 parts of color seasoning; dispersing agent: 1-2 parts of deionized water: 5 to 20 portions.
Thixotropic agent: 1.5 to 4.5 parts by weight,
film-forming auxiliary agent: 4-10 parts.
The waterborne silicon modified polyurethane resin adopts closed isocyanate; the dispersing agent adopts a high-molecular block polymer; the thixotropic agent adopts polyurethane association type; the film-forming assistant is alcohol ether film-forming assistant, in particular ethylene glycol monobutyl ether.
A preparation method of a water-based elastic coating with high weather resistance comprises the following steps:
the preparation method of the water-based high weather-resistant elastic coating comprises the following steps:
adding deionized water, a dispersing agent and a color filler in corresponding parts by mass into a pulling cylinder, mixing and stirring uniformly, then dispersing at medium speed for 15-20 min, and grinding to the required fineness after dispersion to prepare the water-based color paste;
adding the corresponding mass parts of the waterborne silicon modified polyurethane resin and the waterborne latent curing agent into another drawn cylinder, mixing and uniformly stirring, adding the corresponding mass parts of the thixotropic agent, stirring for 10-20 min, adding the corresponding mass parts of the film-forming assistant after the viscosity is stable, stirring for 5-10 min, and finally adding the waterborne color paste, and stirring for 10-20 min to obtain a finished product. The temperature is controlled to be less than or equal to 60 ℃ in the whole stirring process.
In order that the present invention may be more clearly understood, the following detailed description of the present invention is given with reference to specific examples.
Example one
The water-based high-weather-resistance elastic coating comprises the following components in parts by mass:
aqueous silicon-modified polyurethane resin: 35 parts of (B);
aqueous latent curing agent: 2 parts of (1);
water-based color paste: 15 parts of color seasoning; dispersing agent: 1 part and deionized water: 5 parts of a mixture;
thixotropic agent: 1.5 parts;
film-forming auxiliary agent: 4 parts.
In this example, blocked isocyanate was used as the aqueous silicon-modified urethane resin; the dispersing agent adopts a high-molecular block polymer; the thixotropic agent adopts polyurethane association type; the film-forming assistant is alcohol ether film-forming assistant, in particular ethylene glycol monobutyl ether.
The preparation method of the water-based high weather-resistant elastic coating comprises the following steps:
adding deionized water, a dispersing agent and a color filler in corresponding parts by mass into a pulling cylinder, mixing and stirring uniformly, then dispersing at medium speed for 16min, and grinding to the required fineness after dispersion to prepare the water-based color paste;
adding the corresponding mass parts of the waterborne silicon modified polyurethane resin and the waterborne latent curing agent into another drawn cylinder, mixing and uniformly stirring, adding the corresponding mass parts of the thixotropic agent, stirring for 11min, adding the corresponding mass parts of the film-forming assistant after the viscosity is stable, stirring for 6min, adding the waterborne color paste, and stirring for 11min to obtain a finished product, namely the sample 1A. The temperature is controlled to be about 50 ℃ in the whole stirring process.
When in use, the coating is diluted to construction viscosity by deionized water and is subjected to roll coating.
Example two
The water-based high-weather-resistance elastic coating comprises the following components in parts by mass:
aqueous silicon-modified polyurethane resin: 55 parts of (1);
aqueous latent curing agent: 4 parts of a mixture;
water-based color paste: 36 parts of color seasoning; dispersing agent: 2 parts of deionized water: 20 parts of (1);
thixotropic agent: 4.5 parts;
film-forming auxiliary agent: 10 parts.
In this example, blocked isocyanate was used as the aqueous silicon-modified urethane resin; the dispersing agent adopts a high-molecular block polymer; the thixotropic agent adopts polyurethane association type; the film-forming assistant is alcohol ether film-forming assistant, in particular ethylene glycol monobutyl ether.
The preparation method of the water-based high weather-resistant elastic coating comprises the following steps:
adding deionized water, a dispersing agent and a color filler in corresponding parts by mass into a pulling cylinder, mixing and stirring uniformly, then dispersing at medium speed for 20min, and grinding to the required fineness after dispersion to prepare the water-based color paste;
adding the corresponding mass parts of the waterborne silicon modified polyurethane resin and the waterborne latent curing agent into another drawn cylinder, mixing and stirring uniformly, adding the corresponding mass parts of the thixotropic agent, stirring for 20min, adding the corresponding mass parts of the film-forming assistant after the viscosity is stable, stirring for 10min, adding the waterborne color paste, and stirring for 20min to obtain a finished product, namely the sample 1B. The temperature was controlled at 60 ℃ throughout the stirring.
When in use, the coating is diluted to construction viscosity by deionized water and is subjected to roll coating.
EXAMPLE III
The water-based high-weather-resistance elastic coating comprises the following components in parts by mass:
aqueous silicon modified polyurethane resin: 45 parts of (1);
aqueous latent curing agent: 3 parts of a mixture;
water-based color paste: color seasoning, 25 parts; dispersing agent: 2 parts of deionized water: 13 parts;
thixotropic agent: 3 parts of a mixture;
film auxiliary agent: 7 parts.
In this example, blocked isocyanate was used as the aqueous silicon-modified urethane resin; the dispersing agent adopts a high-molecular block polymer; the thixotropic agent adopts polyurethane association type; the film-forming assistant is alcohol ether film-forming assistant, in particular ethylene glycol monobutyl ether.
The preparation method of the water-based high weather-resistant elastic coating comprises the following steps:
adding deionized water, a dispersing agent and a color filler in corresponding parts by mass into a pulling cylinder, mixing and stirring uniformly, then dispersing at a medium speed for 17min, and grinding to a required fineness after dispersion to prepare an aqueous color paste;
adding the corresponding mass parts of the waterborne silicon modified polyurethane resin and the waterborne latent curing agent into another drawn cylinder, mixing and uniformly stirring, adding the corresponding mass parts of the thixotropic agent, stirring for 15min, adding the corresponding mass parts of the film-forming assistant after the viscosity is stable, stirring for 7min, adding the waterborne color paste, and stirring for 15min to obtain a finished product, namely the sample 1C. The temperature is controlled to be about 55 ℃ in the whole stirring process.
When in use, the coating is diluted to construction viscosity by deionized water and is subjected to roll coating.
Comparative example 1
The waterborne polyurethane elastic coating consists of waterborne polyurethane resin, color filler and an auxiliary agent, and comprises the following components in parts by weight: 55 parts of waterborne polyurethane resin, 36 parts of color filler, 2 parts of macromolecular block copolymer dispersant, 4.5 parts of polyurethane associated thixotropic agent, 7 parts of ethylene glycol butyl ether and 20 parts of deionized water;
the preparation method of the waterborne polyurethane elastic coating comprises the following steps:
adding deionized water, a dispersing agent and a color filler in corresponding parts by mass into a pulling cylinder, mixing and stirring uniformly, then dispersing at medium speed for 20min, and grinding to the required fineness after dispersion to prepare the water-based color paste;
adding the corresponding mass part of the waterborne polyurethane resin into the other drawn cylinder, mixing and stirring uniformly, adding the corresponding mass part of the thixotropic agent, stirring for 20min, adding the corresponding mass part of the film-forming assistant after the viscosity is stable, stirring for 10min, and finally adding the waterborne color paste and stirring for 20min to obtain a finished product, namely the sample 2. The temperature was controlled at 60 ℃ throughout the stirring.
When in use, the coating is diluted to construction viscosity by deionized water and is subjected to roll coating.
Comparative example No. two
The water-based acrylic elastic coating consists of water-based acrylic resin, a color filler and an auxiliary agent, and the water-based acrylic elastic coating comprises the following components in parts by weight: 55 parts of water-based acrylic resin, 36 parts of color filler, 2 parts of macromolecular block copolymer dispersant, 4.5 parts of polyurethane associated thixotropic agent, 10 parts of ethylene glycol butyl ether and 20 parts of deionized water;
the preparation method of the water-based acrylic elastic coating comprises the following steps:
adding deionized water, a dispersing agent and a color filler in corresponding parts by mass into a pulling cylinder, mixing and stirring uniformly, then dispersing at medium speed for 20min, and grinding to the required fineness after dispersion to prepare the water-based color paste;
and adding the corresponding mass part of the waterborne acrylic resin into the other drawn cylinder, mixing and uniformly stirring, adding the corresponding mass part of the thixotropic agent, stirring for 20min, adding the corresponding mass part of the film-forming assistant after the viscosity is stable, stirring for 10min, and finally adding the waterborne color paste and stirring for 20min to obtain a finished product, namely the sample 3. The temperature was controlled at 60 ℃ throughout the stirring.
When in use, the coating is diluted to construction viscosity by deionized water and is subjected to roll coating.
Comparative example No. three
An oily two-component polyurethane elastic coating specifically comprises a component A and a component B, wherein the component A comprises 50 parts of an oil-based polyurethane resin, 30 parts of a color filler, 2 parts of a polyurethane dispersant, 16 parts of an organic solvent and 2 parts of other auxiliaries (1.5 parts of an acrylate leveling agent and 0.5 part of a silicon defoamer); the component B comprises 60 parts of oily elastic isocyanate curing agent and 40 parts of ester solvent.
The preparation method comprises the following specific processes:
(1) preparation of component A
Adding the oil-based polyurethane resin and the organic solvent into a drawing cylinder, uniformly stirring, dispersing at a medium speed for 20-30 min, then adding other additives, uniformly dispersing at a medium speed, adding materials such as a color filler and a dispersing agent, and grinding to a required fineness;
(2) preparation of component B
Adding an oily elastic polyurethane curing agent and an ester solvent into a drawing cylinder, uniformly stirring, dispersing at a medium speed for 20-30 min, adding other auxiliary agents, and stirring at the medium speed for 10 min; dispersing at high speed for 20-30 min after feeding is finished, wherein the dispersion temperature is less than or equal to 60 ℃;
when in use, the component A and the component B (namely the sample 4) are fully and uniformly mixed, and then construction can be carried out.
Test conditions and results
From the above table, it can be seen that the drying property, acid and alkali resistance, and water resistance of the systems of sample 1A, sample 1B, and sample 1C are superior to those of other aqueous samples. The use of the method is the same as that of the samples 2 and 3, the curing agent is not required to be added, and the method has the advantages of convenient and simple operation and longer service life. The aqueous product is safer and more environment-friendly, and has excellent physical and chemical resistance with an oily two-component product sample (namely sample 4).
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The water-based high-weather-resistance elastic coating is characterized by comprising the following components in parts by mass:
aqueous silicon-modified polyurethane resin: 35-55 parts of a solvent;
aqueous latent curing agent: 2-4 parts.
2. The aqueous highly weather-resistant elastic coating material as claimed in claim 1,
the coating also contains an auxiliary agent.
3. The aqueous highly weather-resistant elastic coating material as claimed in claim 1,
the auxiliary agent comprises a thixotropic agent and a film-forming auxiliary agent.
4. The aqueous highly weather-resistant elastic coating material as claimed in claim 1,
the paint also contains water-based color paste.
5. The aqueous highly weather-resistant elastic coating material as claimed in claim 4,
the water-based color paste comprises a color filler.
6. The aqueous highly weather-resistant elastic coating material as claimed in claim 1,
the water-based color paste also contains deionized water and a dispersant.
7. The water-based elastic coating with high weather resistance as claimed in claim 1, which is characterized by further comprising the following components in parts by mass:
water-based color paste: 15-36 parts of color seasoning; dispersing agent: 1-2 parts of deionized water: 5-20 parts of a stabilizer;
thixotropic agent: 1.5 to 4.5 parts by weight of a stabilizer,
film-forming auxiliary agent: 4-10 parts.
8. A process for preparing the aqueous highly weatherable elastomeric coating according to claim 7,
the method comprises the following steps:
and (2) mixing and uniformly stirring the aqueous silicon modified polyurethane resin and the aqueous latent curing agent in corresponding parts by mass, adding the thixotropic agent in corresponding parts by mass, stirring again, adding the film-forming aid in corresponding parts by mass after the viscosity is stable, stirring, and finally adding the aqueous color paste for stirring to obtain a finished product.
9. The method according to claim 8,
and mixing and uniformly stirring the deionized water, the dispersant and the color filler in corresponding parts by mass, then dispersing, and grinding to the required fineness to obtain the water-based color paste.
10. The method according to claim 8,
the temperature is controlled to be less than or equal to 60 ℃ in the whole stirring process.
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| CN111087908A (en) * | 2019-12-25 | 2020-05-01 | 天津米一科技有限公司 | Special anticorrosive material for carbon steel replacing stainless steel and preparation method thereof |
| CN111662430A (en) * | 2019-03-07 | 2020-09-15 | 旭化成株式会社 | Blocked polyisocyanate composition, aqueous coating composition, and coating film |
| CN111732708A (en) * | 2020-06-04 | 2020-10-02 | 旭川化学（苏州）有限公司 | Soft high-resilience aqueous polyurethane resin and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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