High hardness, super stain-resistant and weather-resistant matte finish
Traditional stone paint is easy to get dust, not dirty, poor weather resistance and many other shortcomings, everyone can see. “Low-carbon light color stone” is a high weathering pure C silicon emulsion, with excellent UV and aging resistance, can easily pass the artificial aging test of more than 2,000h, to ensure a longer decorative and protective buildings, to achieve high-quality sustainable development.
02
Application experiment
2. 1. The main test apparatus is shown in Table 1:
Test instrument
High-hardness super stain-resistant weather-resistant matte overcoat paint formula
2、3、Test methods and test requirements:
■ Viscosity, thixotropy
Use Stormer viscometer to test the KU viscosity of paint samples, use rotational viscometer to test the viscosity of paint samples and calculate the thixotropy value;
■Particle state
After adding sand to the base paint, use color paste (color paste addition amount of 0.1%-1%) to adjust the color, dispersing disk granulation, 690r/min granulation 40s, the granulated particles after a period of time to observe whether there is bleed color, seepage of emulsion, delamination phenomenon, as well as different environments for storage to observe the state of the particles and the status of the tank;
■ ■ permeability
After adding continuous phase according to the formula, observe the permeability of the paint samples;
■Storage stability
Store the paint samples at 5℃, 23℃ and 50℃ respectively, and continuously track the viscosity of the paint samples and the change of the state in the can;
■Early water whiteness
Scrape or spray paint samples into a sample plate, dry at 23 ℃ environment for 1d, drip water on the sample plate to observe the paint film white;
Water permeability, water resistance, alkali resistance, alkali resistance to salinity and thermal storage stability of matching sand primer.
Tested according to the standard JG/T 210-2018 “Primer for internal and external walls of buildings”;
Anti-cracking property of matching sand-containing primer for thick coating
Use 400μm frame film maker to make film on non-asbestos fiber cement flat plate, and observe whether the paint film has cracking phenomenon after natural drying for 1d;
Early alkaline resistance and tearing resistance of matching sand-containing primer.
Scrape putty on the asbestos-free fiber cement flat plate, slightly sanded and smoothed after 2h of room temperature maintenance, rolled primer and room temperature maintenance for 1h, test the pH value of the surface of the primer;
Scrape putty on the asbestos-free fiber cement plate, sand it flat after 1d of room temperature maintenance, brush on the primer and maintain it at room temperature, test the primer’s resistance to tearing of American paper after 4h and 24h of maintenance respectively;
■Matte finish varnish gloss, stain resistance, stain resistance, coating temperature change resistance.
Tested with reference to the test methods in the standard HG/T 5065-2016 “Overcoat Varnish for Architectural Coatings”;
■Matching matte overprint varnish water whiteness resistance
Use 100um wire rod to make film, maintain under standard environment for 1 day, soak in tap water for 1 day to observe the whiteness of the paint film and recovery; use 100um wire rod to make film, maintain under standard environment for 7 days, soak in tap water for 1 day, 2 days, 3 days, 4 days to observe the whiteness of the paint film and recovery;
■ supporting matte overlay varnish pencil hardness
Sharpening pencil with a pencil sharpener to 4-6 mm column type quill (not loose or cut the quill), hold the pencil and 400 # sandpaper surface perpendicular to the sandpaper, grinding and scratching on the sandpaper until you get the end flat, sharp edges of the pen end (the edge shall not be broken or nicked), the pencil should be used once to rotate 180 ° and then used again or regrind and then use;
Specimen fixed in the horizontal table, holding the pencil has been sharpened and grinded with the coating at an angle of 45 degrees, force to one millimeter per second speed forward, the degree of force so that the edge of the pencil broken or plowed through the coating is appropriate. Starting from the hardest pencil, each level of pencil scratch 5 times, two of the five times can plow through the coating for a softer pencil, until to find out at least four of the five times can not plow through the coating of the pencil until the hardness of the pencil for the measured coating of the pencil hardness.
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2, 4, experimental results:
2, 4, 1, supporting sand-containing anti-alkali primer performance
Summary: Sand-containing anti-alkali primer is used for sealing and reinforcing the putty layer, preventing the substrate and putty layer from flooding alkali salt precipitation, and enhancing the adhesion of the main coating and putty layer and the ability to resist the tearing off of the American paper.
RS-309 utilizes special functional groups in the emulsion and excellent film-forming property to ensure fast curing and drying on the putty layer of concrete and cement base which is not completely dried, avoiding the salinity of the substrate to migrate to the upper coating during the drying process.
RS-66 adopts molecular weight control technology, the emulsion particles can quickly penetrate into the putty, at the same time, the functional groups on its surface cross-link in the film-forming process to form a dense coating, so as to achieve the effect of reinforcing and sealing; low MFFT design to achieve zero-added film-forming additives and less additive film-forming additives; and its latex surface adopts the double-layer protection technology, a very small amount of antifreeze can have an excellent stability of freezing and thawing. ■ The use of quartz sand is not just a way to reduce VOCs in the formulation.
Quartz sand is not only to further improve the coating’s resistance to the tearing of American paper, but also to enhance and enrich the texture of the entire coating.
■The primer of this program is RS-309+RS-66+quartz sand three-in-one way to realize the matching primer of “Low Carbon Light Color Stone”. From the test results, the PH value of the coating surface is neutral, which not only has good water resistance and alkali resistance, but also has outstanding salt alkaline resistance. Lay a solid foundation for the whole coating system.
2、4、2、Viscosity and thixotropic index of dispersing medium
Summary: protective gel modifier and protective gel aqueous solution has a very good synergistic effect, through a number of cross and gradient test, when the colorful protective gel granulation solution in the protective gel concentration is certain, with the protective gel modifier additive increases, its pseudoplasticity is more and more strong. On the contrary, when the protective gel modifier is certain, the pseudoplasticity of the prepared dispersing medium becomes worse and worse with the higher concentration of protective gel. Considering the cost of the formula and other factors, the more ideal ratio is the dispersing medium (colorful protective gel granulation solution) in the protective gel concentration of about 2%, the amount of protective gel modifier is about 4%.
Summary:
■ RS-8300 as “low-carbon light color stone” as the basis of paint because the emulsion adopts the “molecular design” technology, and cellulose has a strong bonding effect, to provide particles with super cohesion, good toughness of the color points, easy to prepare into the “liquid color sand”. “Liquid color sand”, resistant to shear and high air pressure. In addition, through the “activity-controllable” technology, it can control the distribution of charge on the surface of the particles, and has very strong reactivity and adaptability with the protective adhesive; the morphology of the stored particles is very stable under different conditions. Pure propylene-silicon structure design, with excellent water resistance, water whiteness and weather resistance; does not contain APEO, heavy metals, no artificial addition of formaldehyde and other harmful substances, to meet the high environmental requirements of the product.
■ Preparation of stable “liquid colored sand” need to choose the “liquid colored sand” has a good suspension of the product is the key. According to the rheological theory of paint, usually the higher the yield value, the better the bearing of particles, and vice versa, the worse. The reason why we choose this kind of protective gel modifier preparation “low carbon light color stone” dispersion medium (protective gel granulation liquid) is because the product with the protective gel (lithium magnesium silicate) has a good entanglement synergistic effect between the low shear viscosity and Ti value is significantly higher than with the xanthan gum aqueous solution prepared by the colorful protective gel granulation liquid, but the KU value is indeed higher than with the 0.2% xanthan gum preparation. The low shear viscosity and Ti value are obviously higher than that of the colorful protective gel granulating liquid prepared with xanthan gum aqueous solution, but the KU value is lower than that of the dispersing medium prepared with 0.2% xanthan gum, which is more conducive to the preparation of “liquid colored sand” particles.
Compared with the xanthan gum system, the dispersing medium prepared with the protective gum modifier shows obvious advantages over the xanthan gum system in the actual application test of the main coating of “low-carbon light colored stone” in terms of the load-bearing property of the colorful particles, anti-seepage color and anti-seepage emulsion. Traditional xanthan gum system and protection glue (lithium magnesium silicate) also has a very good solubility, with the increase of the concentration of colorful particles bearing will be better, but the substance is polysaccharide polymer substances prone to mildew, you need to add more fungicide in order to meet the requirements of its storage tanks; secondly, it is a completely water-soluble products, the coating of the water absorption will be correspondingly large, in these two aspects of the type of protection glue modifiers is also significantly better. In these two aspects, this type of protective adhesive modifier is relatively also significantly better.
■ ■ 100,000 hydroxyethyl cellulose + hydrophobic modification of conjugated cellulose + RS-8300 + protection adhesive + snowflake white quartz sand + rutile titanium dioxide, the use of water in the sand technology path, the five organic combination of interlocking entanglement, to achieve the “liquid colored sand” sustainable, industrialized production. Preparation of “liquid colored sand” size can be deployed, the particles round, full of texture, rich viscoelasticity, in different environmental temperatures in the storage tank through, clear particles, no seepage of color seepage milk and delamination and other phenomena!
Summary:
■ The reason why RS-3900 is chosen as the continuous phase of the main coating of “Low-carbon light-colored stone” is that the emulsion introduces a thicker inert protective layer on the outside of the emulsion particles, which ensures that the main coating of “Low-carbon light-colored stone” has excellent stability. Secondly, the nano-silica structure is designed with finer particle size and more translucent finish, which guarantees the excellent weather resistance of the paint film, as well as the outstanding water and chemical resistance of the paint film.
EXP-007 is a pure C emulsion synthesized by segmented swelling process, due to its special synthesis process and monomer structure, it can form a self-thickening reticulation structure alone to achieve the construction viscosity without the need to add additional thickeners; through the optimization of the stabilization system and the control of the distribution of the particle size, it has excellent water whiteness resistance, permeability and good storage stability.
■ The organic matching of the two emulsions in the program is to make use of its low viscosity and high thixotropy qualities to ensure that the color dots are not easy to be delaminated, which is especially suitable for the long time storage and convenient and continuous production of the main coating of low carbon light colored stone; the formulation can achieve the synergistic anti-sinking effect without adding or less adding hydrophobically modified alkali-swelling thickening agent, which greatly improves the water-resistant and water-whitening-resistant performance of the main coating of low carbon light colored stone.
■ In different environments (low temperature 5 ℃, room temperature 23 ℃, high temperature 50 ℃) storage of the stability of its performance is good, there is no delamination, bleed color, bleed milk phenomenon, paint samples are no abnormality. Replacement of xanthan gum with protective gum modifier, the colorful particles bearing, bleed color, bleed emulsion, storage stability, etc. are significantly improved, the water white resistance also has a good performance, followed by the protective gum modifier compared to the xanthan gum system is not easy to degradation, the main protective gum modifier to replace the xanthan gum can also reduce the amount of protective gum in the pelleting solution to reduce the cost of the formulation of the advantages of the cost.
2, 4, 5, supporting high hardness
Super stain-resistant weathering matte finish performance
Matching high hardness super stain-resistant weather-resistant matte finish paint stain-resistant, stain-resistant picture:
Matching high hardness super stain-resistant weather-resistant matte finish paint maintenance 1d immersion and maintenance 7d immersion water-resistant white pictures:
Summary:
Low-carbon light color stone” adopts high hardness super stain-resistant and weather-resistant matte overcoat paint as the last protective layer of the whole coating. The matte finish paint compared to the traditional matte finish mainly with matte powder to eliminate the gloss of the paint film, this program adopts the phase separation polymerization technology to prepare water-based high hardness matte finish paint, with excellent self-matte and high translucency.
Completely remove the matte powder in the traditional matte finish formula, not only reduces the cost of paint formulations, but also reduces the process of dispersing matte powder, simplifies the production process, energy saving and emission reduction, and greatly reduces the production of safety hazards (matte powder feeding is easy to cause dust, employees are susceptible to occupational diseases, there is a risk of dust explosion).
■ RS-8792 is a high crosslinking degree of silicone emulsion, with high hardness and scratch resistance. The introduction of special silicone makes the paint film form uniform nano voids, which can allow air to come in and out freely, and at the same time prevent the water molecules from coming in and out, breathable and impermeable, which not only ensures the early water resistance of the paint film, but also enables the early strength of the paint film to be built up quickly.
At the same time, through the specific hydrophilic material ratio of the best match, so that the paint film in the long-term soaking, water molecules can be adjusted through the penetration of hydrophilic material, so that the paint film in the long-term soaking of water molecules can be adjusted through the hydrophilic part of the free adjustment, to avoid the formation of larger water molecules richly aggregated area, thus resulting in the phenomenon of the paint film whitening. The permeability, strength, hardness and adhesion of the paint film after soaking in water are significantly better than traditional products.
■ RS-8636 silicone modified pure acrylic emulsion, with excellent weather resistance, special functional materials and preparation process, the film to form a hydrophilic and hydrophobic structure so that the formation of its internal gradient distribution from the inside out; so that the main film-forming material in the film formed after the formation of different sizes of phase-separated structural layers to achieve the effect of full matte at all angles, and its self-matte design mechanism is different from the traditional matte design mechanism. Because the coating has good hydrophobicity and densification, it has excellent water resistance, low water permeability and excellent stain resistance (stain resistance can easily pass the requirements of HG/T 5065-2016 standard for external use), which effectively avoids defects such as whitening, rain marks and poor stain resistance in the later stage of the coating.
This test program is to use RS-8792 self-crosslinking high hardness, high water white, breathable and impermeable qualities with RS-8636 self-matting full-angle matte and outstanding stain resistance. The final realization of the whole coating has excellent water whiteness, high hardness, low water permeability and outstanding stain resistance (less than 6), stain resistance (not less than 85); in the gloss can be through the two different ratios to achieve the desired coating gloss (60 ° angle from 6.1 to 21.3, 85 ° angle can be from 13.6 to 49.9), the free deployment, the formation of one plus one is greater than two! synergistic effect. It creates a safe, long-lasting, beautiful and high-quality protective barrier for the entire coating.
03
Summarize
Innovation is more than just a little bit:
Low-carbon light color stone” compared with the traditional exterior real stone paint only uses snowflake white or fine white sand as the skeleton, without color sand, reduce the uncertainty of the quality of color sand (such as the main components, water absorption, oxide content, hardness, whether friable, active ingredient content, etc.) due to different mineral sources, effectively reduce the color difference between batches of color mixing, and improve the utilization rate of the storage space of the paint enterprise. Utilization rate; secondly, the whole coating compared to the exterior wall of the real stone paint fusion becomes very high, not easy to hair flower, greatly reducing the construction of the exterior wall of the real stone paint brought about by the easy rework and repair of the subsequent risk.
Value creates wealth
“Low-carbon light-colored stone” program from the procurement of raw materials, transportation, loading and unloading to the production of finished products, warehousing, supply and transportation, and then to the site loading and unloading, construction, maintenance and renovation, as well as waste disposal, etc. Compared with the current exterior stone paint, the emission reduction and social responsibility brought about by the reduction of the amount of paint is clearly manifested in many parts of the product’s entire life cycle. The goal of carbon reduction and social responsibility.
Development is the hard way
A thousand sails pass by a sinking boat, and ten thousand trees spring up in front of a sick tree. High decorative, high stability, high cost-effective, strong protection, good durability and sustainable development is our “low-carbon light color stone” program to replace the current and future development of the industry’s thinking and attitude, is the industry’s high-quality development of the inevitable road.
