Single-component self-crosslinking water-based safety marking coating and preparation method thereof

Abstract

The invention relates to a single-component self-crosslinking water-based safety marking coating and a preparation method thereof.The single-component self-crosslinking water-based safety marking coating is mainly prepared from, by weight, 35-45 parts of film forming matter, 2-4 parts of coalescing agent, 30-35 parts of glass beads, 0-5 parts of filler, 3-15 parts of pigment, 1 part of dispersing agent, 0.1-0.2 part of anti-settling agent, 0.5-1 part of anti-freezing agent, 0.1-0.3 part of flatting agent and 0.1-0.5 part of defoaming agent. 0.1-1 part of a thickening agent, 1-2 parts of a pH value regulator and 4-10 parts of deionized water. The invention also comprises a preparation method of the single-component self-crosslinking water-based safety marking paint. The single-component self-crosslinking water-based safety marking coating is safe, environment-friendly and convenient to construct, has the film coating performance which can be achieved by a crosslinking film-forming type double-component coating, is outstanding in various resistance, and can be normally used for more than 5 years after being brushed outdoors.

Description

Technical Field

[0001] The invention relates to a single-component self-crosslinking water-based safety road marking paint and a preparation method thereof. Background Art

[0002] Road marking paint refers to a kind of paint used for marking the ground on roads or public transportation places. It is usually made by grinding and dispersing film-forming materials, pigments, fillers, additives and water or organic solvents. Before and after construction, a series of standards and requirements must be strictly followed to ensure that the painted markings have good visibility, durability and safety.

[0003] At present, road marking paints are mainly divided into four categories: hot melt type, room temperature solvent type, two-component type and water-based road marking paints. Among them, hot melt road marking paints are the most widely used, and they are mainly used for secondary and above highways, expressways and urban roads. This type of product is in powder form and needs to be heated and melted by special equipment before application. It is easy to catch fire and burn construction workers during the construction process, which poses certain safety hazards.

[0004] The second type of product with a wide application is room temperature solvent-based road marking paint. This type of paint does not require heating of the material during construction, and can be used immediately after opening the bucket. The construction is convenient, but this type of paint has a high content of volatile organic matter, causes great environmental pollution, is harmful to the health of construction workers, and also has the risk of fire and explosion during production, transportation, storage and use. As the national environmental protection policy becomes increasingly stringent, this type of product will gradually withdraw from the market.

[0005] Although the third type of ordinary water-based road marking paint has greatly improved in construction convenience and safety compared with the first two types of road marking paints, as a single-component water-based paint, its film-forming process is generally physical film-forming, and the molecular weight of the emulsion will not change before and after film-forming. Therefore, this type of paint is far inferior to the cross-linked film-forming two-component paint in terms of hardness, adhesion, wear resistance, and medium resistance. Ultimately, the service life of this type of road marking paint will not be too long, generally around 0.5-1 year. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a single-component self-crosslinking water-based safety road marking paint which is green, safe and environmentally friendly, has high paint film hardness, good wear resistance and excellent nighttime visibility.

[0007] The technical problem to be further solved by the present invention is to overcome the deficiencies of the prior art and provide a preparation method of a single-component self-crosslinking water-based safety marking paint which has a simple process, low cost and is suitable for industrial production.

[0008] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0009] The one-component self-crosslinking water-based safety road marking paint of the present invention is mainly prepared from the following raw materials: film-forming substance, film-forming aid, glass microbeads, filler, pigment, dispersant, anti-settling agent, antifreeze agent, leveling agent, defoamer, thickener, pH value regulator and deionized water.

[0010] The weight proportions of the components in the coating are as follows: film-forming substance: 35-45 parts, film-forming aid: 2-4 parts, glass microspheres: 30-35 parts, filler: 0-5 parts, pigment: 3-15 parts, dispersant: 1 part, anti-settling agent: 0.1-0.2 parts, antifreeze agent: 0.5-1 parts, leveling agent: 0.1-0.3 parts, defoamer: 0.1-0.5 parts, thickener: 0.1-1 parts, pH value regulator: 1-2 parts, deionized water 4-10 parts. When the weight proportions of the raw materials are within the above range, the product performance indicators are optimal.

[0011] Preferably, the film-forming substance is a latent curing self-crosslinking acrylic emulsion, one or more of the following: 35-45% solid content of Baolijia 2337A, 2338 and Badfu RS8761.

[0012] Preferably, the film-forming aid is an alcohol ester substance having a boiling point greater than 240°C and containing 12 carbon atoms or more; more preferably, the film-forming aid is one or both of Eastman OE300 having a boiling point greater than 240°C and containing 12 carbon atoms or more and Haichuan Chemical's OPC12.

[0013] Preferably, the glass microbeads have a light transmittance greater than 50%, a compressive strength greater than 50 MPa, and a mesh size of 200-320.

[0014] Preferably, the filler is silicon micropowder with a whiteness between 93-95 and a mesh number of 2500; more preferably, the filler is one or two of the silicon micropowders with a whiteness between 93 and 95 and a mesh number of 2500 produced by Miaojing Weisheng Silicon Materials Co., Ltd. or Guangzhou Yongjiu Fine Chemical Co., Ltd.

[0015] Preferably, the pigment is one or more of high-color carbon black, rutile titanium dioxide, organic yellow or phthalocyanine blue.

[0016] Preferably, the dispersant is one or more of BYK-190, TEGO-755, and TEGO-760 produced by BYK or TEGO.

[0017] The anti-settling agent is preferably Zhejiang Fenghong EW.

[0018] The antifreeze agent is preferably one or both of Shell ethylene glycol and propylene glycol.

[0019] The leveling agent is preferably one or more of BYK-349, BYK-346 and BYK-333 produced by BYK.

[0020] The defoaming agent is preferably one or more of TEGO-845, TEGO-810, TEGO-902 produced by Evonik, BYK-028, BYK-1790 produced by BYK.

[0021] The thickener is preferably one or more of Wanhua 300E, 505 or Dow RM2020.

[0022] The pH adjuster is preferably one or both of Haichuan C-950 and Dow AMP-95.

[0023] The technical solution adopted by the present invention to further solve the technical problem is as follows: a method for preparing a one-component self-crosslinking water-based safety marking paint comprises the following steps:

[0024] (1) mixing deionized water, pigment, filler, dispersant, anti-settling agent, antifreeze agent, leveling agent, defoaming agent, and pH adjuster, and pre-dispersing the mixed slurry under stirring to obtain a pre-dispersed slurry;

[0025] (2) grinding the slurry pre-dispersed in step (1) (preferably using a horizontal sand mill) until the slurry fineness is less than 30 μm;

[0026] (3) slowly adding a film-forming substance, a film-forming aid and glass beads to the slurry after grinding in step (2) under stirring to mix;

[0027] (4) Add a thickener to the mixture obtained in step (3) to adjust the viscosity and control the viscosity to 80-100 KU.

[0028] In step (2) of the preparation method of the one-component self-crosslinking water-based safety marking paint of the present invention, controlling the slurry fineness can ensure the uniformity of dispersion of various pigments and fillers, and ultimately achieve a better paint film surface effect; in addition, in step (4), controlling the final viscosity of the coating to between 80-100 KU can ensure that the coating has better construction performance and storage performance.

[0029] Preferably, in step (1), the speed of pre-dispersion stirring is 600-800 r / min, and the pre-dispersion time is 10-15 min. If the stirring speed is too low, the materials cannot be evenly mixed and fully dispersed, and if the speed is too fast, the materials will splash.

[0030] Preferably, in step (2), the grinding is performed to a fineness of ≤30 μm. If the fineness is too high, it will cause poor coating surface effect and insufficient pigment dispersion, resulting in floating color and floating phenomenon.

[0031] Preferably, in step (3), the blending speed is 600-800 r / min and the blending time is 20-30 min. If the blending speed is too high or the time is too long, the emulsion may break easily. If the blending speed is too low or the time is too short, the materials may not be mixed evenly.

[0032] Preferably, in step (4), the viscosity of the finished product is 80-100 KU. If the viscosity is too low, the coating will sink to the bottom, delaminate, and other undesirable phenomena after long-term storage. If the viscosity is too high, the construction performance will decrease, the orange stripes on the coating surface will be obvious, and the coating film will be unsightly.

[0033] The marking paint prepared by the present invention uses a water-based self-crosslinking dispersion as the main film-forming substance supplemented with special fillers, glass beads, pigments and additives. The coating performance can reach the level of general oil-based two-component acrylic paint, and is more environmentally friendly. Its VOC content is less than 22g / kg, and the coating also has good night visibility. Compared with existing hot-melt marking paints, the construction is more convenient and safer, and the risks of scalds, burns and fires during construction can be eliminated; compared with room temperature single / two-component solvent-based marking paints, it is more environmentally friendly, the paint film performance is better, and transportation and storage are safer. Compared with most water-based marking paints; the water-based safety marking paint of the present invention is more environmentally friendly, the paint film is more durable and has good visibility.

[0034] The one-component self-crosslinking water-based safety marking paint of the present invention can be directly rolled or sprayed on the treated concrete floor or most coatings such as epoxy floor coatings, acrylic coatings, etc. The coating has strong adhesion to most substrates, the coating itself has high hardness, good wear resistance, fast drying speed, good nighttime visibility, and good route guidance and driving safety. The coating has good construction performance and can well meet the construction site operation requirements; the coating of the present invention is a long-life environmentally friendly product; its performance is comparable to that of a two-component marking paint, but the product has lower cost and is more convenient to construct. Therefore, the product of the present invention has broad market prospects; the preparation method of the water-based safety marking paint of the present invention is simple, the production cost is low, and it is suitable for industrial production.

[0035] The one-component self-crosslinking water-based safety road marking paint of the present invention is not only safe and environmentally friendly, but also convenient to construct. In terms of coating performance, it also has the performance characteristics that can only be achieved by a crosslinking film-forming two-component coating. Therefore, the coating of the present invention has outstanding performance in various resistance aspects and can be used normally for more than 5 years after being painted outdoors. The one-component self-crosslinking water-based safety road marking paint of the present invention overcomes various obvious shortcomings of various existing road marking paints. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the embodiments.

[0037] The film-forming substances 2337A and 2338 used in the embodiments of the present invention were purchased from Baolijia, and RS8761 was purchased from Badfu; the film-forming aids used were OE300 from Eastman and OPC12 from Haichuan; the glass beads used were purchased from Dachun (Hebei) Building Materials Technology Co., Ltd., which were glass beads with a light transmittance greater than 50%, a compressive strength greater than 50 MPa, and a mesh size of 200-320 mesh; the filler silicon micropowder QM02 was purchased from Guangzhou Yongjiu Fine Chemical Co., Ltd., and XY-1005 was purchased from Miaojing Weisheng Silicon Materials Co., Ltd.; the coloring pigment carbon black MA-100 was purchased from Mitsubishi Chemical of Japan, and titanium dioxide SR237 7 was purchased from Shandong Dongjia; the dispersant BYK-190 used was purchased from BYK, and TEGO-755 and TEGO-760 were purchased from Digao; the anti-settling agent EW used was purchased from Zhejiang Fenghong; the defoaming agents TEGO-810, TEGO-845, and TEGO-902 used were purchased from Digao, the defoaming agents BYK-028 and BYK-1790 were purchased from BYK, and the leveling agents BYK-346, BYK-349, and BYK-333 were purchased from BYK; the pH adjuster AMP-95 was purchased from Dow, and C-950 was purchased from Haichuan; the thickeners 300E and 505 were purchased from Wanhua Chemical, and RM2020 was purchased from Dow Chemical.

[0038] Unless otherwise specified, the chemical reagents used in the embodiments of the present invention were obtained through conventional commercial channels.

[0039] Examples 1 to 3

[0040] One-component self-crosslinking water-based safety marking paint Examples 1 to 3

[0041] The weight parts of each raw material are shown in Table 1:

[0042] Table 1 Weight parts of raw materials in Examples 1 to 3 of water-based safety marking paint

[0043]

[0044]

[0045] Note: “-” in the table means not added.

[0046] Example 1

[0047] The preparation method of the one-component self-crosslinking water-based safety marking paint of this embodiment comprises the following steps:

[0048] (1) Dispersion: Deionized water, coloring pigment, filler, dispersant, anti-settling agent, antifreeze agent, leveling agent, defoamer, and pH adjuster are mixed according to the weight of each component of the water-based safety marking paint of Example 1 as described in Table 1, and dispersed at 800 r / min for 15 min until no obvious lumps exist and the materials are evenly dispersed, thereby obtaining a pre-dispersed slurry;

[0049] (2) Sand grinding: The pre-dispersed slurry is pumped into a sand mill for grinding until the fineness of the entire slurry is less than 30 μm to obtain a qualified slurry;

[0050] (3) Slurry preparation: At a stirring speed of 600 r / min, slowly add the specified amount of latent curing self-crosslinking acrylic emulsion, film-forming aid, and glass beads to the slurry, stir at a stirring speed of 650 r / min for 20 minutes until all components are evenly mixed, and slowly add thickener to adjust the coating viscosity to 80 KU.

[0051] (4) Packaging: Pour the paint prepared in step (3) into the packaging barrel according to the specified weight, cover it with a lid, affix a label and put it into storage.

[0052] Example 2

[0053] The preparation method of the one-component self-crosslinking water-based safety marking paint of this embodiment comprises the following steps:

[0054] (1) Dispersion of ingredients: Deionized water, dispersant, coloring pigment, filler, defoamer, antifreeze agent, anti-settling agent, leveling agent, and pH adjuster are mixed according to the weight parts of each component of the water-based safety marking paint of Example 1 as described in Table 1, and dispersed at 600 r / min for 15 min until no obvious lumps exist and each material is evenly dispersed;

[0055] (2) Sand grinding: The pre-dispersed slurry is pumped into a sand mill for grinding until the fineness of the entire slurry is less than 20 μm to obtain a qualified slurry;

[0056] (3) Slurry preparation: At a stirring speed of 700 r / min, slowly add the specified amount of latent curing self-crosslinking acrylic emulsion, film-forming aid, and glass beads to the slurry, stir at a stirring speed of 800 r / min for 30 minutes until all components are mixed evenly, and slowly add thickener to adjust the coating viscosity to 90 KU.

[0057] (4) Packaging: Pour the paint prepared in step (3) into the packaging barrel according to the specified weight, cover it with a lid, affix a label and put it into storage.

[0058] Example 3

[0059] The preparation method of the one-component self-crosslinking water-based safety marking paint of this embodiment comprises the following steps:

[0060] (1) Dispersion of ingredients: Deionized water, dispersant, coloring pigment, filler, defoamer, antifreeze agent, anti-settling agent, leveling agent, and pH adjuster are mixed according to the weight parts of each component of the water-based safety marking paint of Example 1 as described in Table 1, and dispersed at 700 r / min for 10 min until no obvious lumps exist and each material is evenly dispersed;

[0061] (2) Sand grinding: The pre-dispersed slurry is pumped into a sand mill for grinding until the fineness of the entire slurry is less than 30 μm to obtain a qualified slurry;

[0062] (3) Slurry preparation: At a stirring speed of 700 r / min, slowly add the specified amount of latent curing self-crosslinking acrylic emulsion, film-forming aid, and glass beads to the slurry, stir at a stirring speed of 600 r / min for 30 minutes until all components are mixed evenly, and slowly add thickener to adjust the coating viscosity to 100 KU.

[0063] (4) Packaging: Pour the paint prepared in step (3) into the packaging barrel according to the specified weight, cover it with a lid, affix a label and put it into storage.

[0064] The water-based safety marking paint obtained in Examples 1 to 3 and the existing normal temperature solvent-based road marking paint prepared with thermoplastic acrylic resin as a film-forming material were respectively applied by roller coating, and the paint was evenly rolled on the concrete floor. The coating film thickness (dry film) of the coatings of Examples 1 to 3 and the comparative example coatings was about 100 microns. The actual measured results of the coating film properties of the coatings of Examples 1 to 3 and Comparative Example 1 according to the technical index requirements specified in JT / T280-2022 road marking paint and Examples 1 to 3 and Comparative Example 1 are shown in Table 2.

[0065] Table 2 Actual test results of coating performance of road marking paint obtained in Examples 1 to 3 and coating film of Comparative Example 1

[0066]

[0067]

[0068] As shown in Table 2, compared with the comparative example, the coatings prepared in Examples 1 to 3 of the present invention are more environmentally friendly and have better adhesion, flexibility, paint film hardness and wear resistance; the coatings of the present invention do not contain heavy metals, have lower VOC content, and are environmentally friendly products; at the same time, the coatings of the present invention have good water resistance and chemical medium resistance. The product construction performance is as simple and convenient as conventional road marking paint.

[0069] The three coatings in Examples 1 to 3 of the present invention were applied in residential garages. There was no odor during the construction process, and the ground was smooth and bright after the construction, with good marking performance. After one year of use, the coating was still smooth and flat, without obvious scratches and wear.

Claims

1. A one-component self-crosslinking water-based safety road marking paint, characterized in that: It is mainly prepared from the following raw materials: film-forming substance, film-forming aid, glass microbeads, filler, pigment, dispersant, anti-settling agent, antifreeze agent, leveling agent, defoamer, thickener, pH regulator and deionized water; The weight proportions of each component in the coating are as follows: film-forming substance: 35-45 parts, film-forming aid: 2-4 parts, glass microspheres: 30-35 parts, filler: 0-5 parts, pigment: 3-15 parts, dispersant: 1 part, anti-settling agent: 0.1-0.2 parts, antifreeze agent: 0.5-1 parts, leveling agent: 0.1-0.3 parts, defoaming agent: 0.1-0.5 parts, thickener: 0.1-1 parts, pH regulator: 1-2 parts, and deionized water 4-10 parts.

2. The one-component self-crosslinking water-based safety road marking paint according to claim 1, characterized in that: The film-forming substance is a latent curing self-crosslinking acrylic emulsion, one or more of the following: Baolijia 2337A, 2338 and Badfu RS8761 with a solid content between 35-45%.

3. The one-component self-crosslinking water-based safety road marking paint according to claim 1 or 2, characterized in that: The film-forming aid is one or both of Eastman OE300 and Haichuan Chemical's OPC12, which have a boiling point greater than 240°C and contain 12 or more carbon atoms.

4. The one-component self-crosslinking water-based safety road marking paint according to claim 1 or 2, characterized in that: The glass micro beads have a light transmittance greater than 50%, a compressive strength greater than 50 MPa, and a mesh size of 200-320.

5. The one-component self-crosslinking water-based safety road marking paint according to claim 1 or 2, characterized in that: The filler is one or two of the silicon micropowders with a whiteness between 93 and 95 and a mesh size of 2500 produced by Miaojing Weisheng Silicon Materials Co., Ltd. or Guangzhou Yongjiu Fine Chemical Co., Ltd.

6. The one-component self-crosslinking water-based safety road marking paint according to claim 1 or 2, characterized in that: The pigment is one or more of high-color carbon black, rutile titanium dioxide, organic yellow or phthalocyanine blue.

7. The one-component self-crosslinking water-based safety road marking paint according to claim 1 or 2, characterized in that: The dispersant is one or more of BYK-190, TEGO-755, and TEGO-760 produced by BYK or Tego; the anti-settling agent is Zhejiang Fenghong EW; the antifreeze agent is one or both of ethylene glycol and propylene glycol; the leveling agent is one or more of BYK-349, BYK-346, and BYK-333 produced by BYK; the defoaming agent is one or more of TEGO-845, TEGO-810, and TEGO-902 produced by Evonik, and BYK-028, BYK-1790, and BYK-024 produced by BYK; the thickener is one or more of Wanhua 300E, 505, or Dow 2020; the pH adjuster is preferably one or both of Haichuan C-950 and Dow AMP-95.

8. A method for preparing the one-component self-crosslinking water-based safety road marking paint as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: (1) mixing deionized water, pigment, filler, dispersant, anti-settling agent, antifreeze agent, leveling agent, defoaming agent, and pH regulator, and pre-dispersing the mixed slurry under stirring to obtain a pre-dispersed slurry; (2) grinding the slurry pre-dispersed in step (1) until the slurry fineness is less than 30 μm; (3) adding a film-forming substance, a film-forming aid and glass beads to the slurry after grinding in step (2) under stirring conditions for blending; (4) Add a thickener to the mixture obtained in step (3) to adjust the viscosity and control the viscosity to 80-100 KU.

9. The method for preparing the self-crosslinking one-component water-based safety road marking paint according to claim 8, characterized in that: In step (1), the speed of pre-dispersion stirring is 600-800 r / min, and the pre-dispersion time is 10-15 min; in step (2), the grinding is performed to a fineness of ≤30 μm.

10. The method for preparing the self-crosslinking one-component water-based safety road marking paint according to claim 8 or 9, characterized in that: In step (3), the blending speed is 600-800 r / min, and the blending time is 20-30 min; and / or, in step (4), the viscosity range of the finished product is controlled to be 80-100 KU.

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