Rainy day enhanced display type road marking material and construction method thereof

Abstract

The invention relates to the technical field of road marking preparation, in particular to a rainy day enhanced display type road marking material and a construction method thereof. The material comprises the following raw materials in parts by weight: 10-30 parts of matrix resin, 5-15 parts of wax, 30-50 parts of glass beads, 5-15 parts of pigment, 10-30 parts of filler, 5-15 parts of plasticizer and 0.1-10 parts of expansive resin. The display effect of the prepared road marking material is adjustable, display can be enhanced in a rainwater environment, normal display can be achieved in a dry environment, the glass beads are reasonably matched, the light reflection performance is better achieved, and the display enhancement function in a rainy day environment is achieved through the water expansibility of the expansive resin and the matching rationality of the glass beads; the retroreflection brightness coefficient is high, and the reflection effect is lasting.

Description

Technical Field

[0001] The present invention relates to the technical field of road marking preparation, and more particularly to a rainy day enhanced display type road marking material and a construction method thereof. Background Art

[0002] As an important part of modern traffic management and safety, road traffic markings are tools that guide, warn and regulate traffic flow by painting or installing various lines, symbols, patterns and signs on the road surface. Traffic markings play a vital role in daily traffic. They not only ensure the smoothness and order of the road, but also play a significant role in driving safety, road use efficiency and the prevention of traffic accidents. They are a "traffic safety law" written on the road. According to statistics from authoritative departments, the probability of a traffic accident being related to the retroreflective performance of road markings is 70%. When the retroreflective brightness coefficient of road markings increases by 10~100mcd·m -2 ·lx -1 , traffic risks will be reduced by 0.9%~8.6%. At the same time, the improvement of the retro-reflective performance of the markings can effectively improve transportation efficiency by more than 30%.

[0003] The role of glass beads in road markings is to provide concentrated retro-reflective light, that is, most of the light irradiated by the light source (headlight) to the road markings is reflected back to the driver's field of vision by the glass beads. Rain will cause diffuse reflection of light, which significantly reduces the effective refractive index of glass beads. When the road markings are covered by rain, its retro-reflective light will also be covered, resulting in almost no retro-reflective light transmission, thus failing to provide good visual guidance, greatly affecting the driving safety of drivers and passengers.

[0004] At present, the development focus of rainy night road marking is mainly on the selection of large-size rainy night glass beads and the use of coated glass beads. However, when the road marking is covered by rain, rainy night glass beads and coated glass beads cannot change the objective reality that the road marking has no reflective effect. Therefore, the development of road marking materials that can display normally in dry environments and enhance display in rainy environments is a technical problem that urgently needs to be solved in the current road marking field. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of one aspect of the present invention is to provide a rainy day enhanced display type road marking material, the raw materials of which include 10 to 30 parts of base resin, 5 to 15 parts of wax, 30 to 50 parts of glass beads, 5 to 15 parts of pigment, 10 to 30 parts of filler, 5 to 15 parts of plasticizer and 0.1 to 10 parts of expansion resin.

[0006] Preferably, the base resin includes one or a combination of C5 petroleum resin, rosin resin, EVA resin, phenolic resin, polyamide resin, ABS resin, acrylic resin and petroleum resin.

[0007] Preferably, the wax includes one or a combination of PE wax, FT wax and oxidized PE wax.

[0008] Preferably, the glass beads include surface-sprinkled glass beads and internally mixed glass beads, the ratio of the surface-sprinkled glass beads to the internally mixed glass beads is 5-8:2-5, and the roundness of the glass beads must be ≥85%; the surface-sprinkled glass beads include No. 4 Rainy Night glass beads with a particle size distribution mainly of 14-30 meshes and No. 1 surface-sprinkled glass beads with a particle size distribution mainly of 20-140 meshes, wherein the No. 4 Rainy Night glass beads account for no less than 30%; the internally mixed glass beads include No. 4 Rainy Night glass beads with a particle size distribution mainly of 14-30 meshes and No. 2 internally mixed glass beads with a particle size distribution mainly of 30-100 meshes, wherein the No. 4 Rainy Night glass beads account for no more than 10% of the total glass beads.

[0009] Preferably, the pigment includes one or a combination of rutile titanium dioxide, titanium dioxide, zinc oxide, lead chrome yellow, titanium yellow, organic yellow pigment, iron oxide, titanium cyan blue, iron oxide black and permanent red.

[0010] Preferably, the filler includes one or a combination of calcium carbonate, talcum powder, silica powder, calcium sand, heavy calcium powder, quartz sand and glass sand.

[0011] Preferably, the plasticizer includes one or a combination of phthalates, vegetable oil (natural oil) and mineral oil.

[0012] Preferably, the main materials of the expandable resin include 200-500 parts of solvent, 100 parts of hydrophilic monomer, 20-50 parts of comonomer, 1-5 parts of initiator, 1-5 parts of cross-linking agent and 1-10 parts of inorganic additives; the solvent is DMSO; the hydrophilic monomer is acrylic acid AA and acrylamide AM; the comonomer is styrene; the initiator is one or a combination of ammonium persulfate, potassium persulfate and azobisisobutyronitrile; the cross-linking agent is N,N-methylenebisacrylamide MBA; the inorganic additive is one or a combination of clay, bentonite, fly ash and glass beads.

[0013] Preferably, the method for preparing the expandable resin is as follows: monomers AA and AM are added to the solvent DMSO in a ratio of 1:1 (wt%) and mixed evenly; then the initiator, crosslinker and comonomer are added, and after mixing evenly, the inorganic additive is added and evenly dispersed. The above mixture is placed in a constant temperature water bath for polymerization reaction, and then the obtained gel polymer is taken out and immersed in water to achieve solvent replacement with DMSO, and then the immersed polymer is dried in a blast drying oven to obtain a dried resin. The dried resin is crushed and ground into powder, thereby completing the preparation of the expandable resin.

[0014] Preferably, during the preparation of the expandable resin, the constant temperature water bath temperature is preferably 60-90° C., preferably 80° C.; the polymerization reaction time is preferably 10-60 min, preferably 30 min; and the drying time is preferably not less than 24 h.

[0015] Another aspect of the present invention is to provide a construction method of a rainy day enhanced display type road marking material, the specific steps of the construction method are: S1. Preparation: First, clean the road surface and lay out the lines and position the lines; S2. Primer application: Add the intumescent resin to the primer material and mix well before applying the primer. The number of applications should be no less than 2. Subsequent construction can be carried out only after the primer is dry. S3. Road marking construction: ① Mix the filler and the remaining expandable resin in advance; ② Take samples by weight, stir the base resin, wax and pigment in a heating kettle until they are molten, add the internal mixed glass beads, the filler and the expandable resin mixture and the plasticizer in turn, mix them evenly to obtain the road marking material; ③ Mark the road marking material obtained (on the primer), then sprinkle the surface-sprinkling glass beads, and complete the road marking construction after cooling and forming.

[0016] Preferably, the ratio of the expandable resin to the primer material in S2 is in the range of 0.1-8%; the ratio of the filler to the expandable resin in S3① is 10-30:0.1-10 parts, and the expandable resin accounts for no more than 6% of the marking material.

[0017] The beneficial effects of the present invention are as follows: 1. The display effect is adjustable, the display can be enhanced in rainy environment and can be displayed normally in dry environment The self-made expandable resin in the marking of the present invention is a technical carrier for realizing the adjustability of the display effect of the marking material. The expandable resin itself is insoluble in water but has the effect of absorbing water and swelling in a water environment, and losing water and restoring in a dry environment. The main component of the expandable resin is a water-absorbing resin with a cross-linked spatial network structure formed by the reaction of AA and AM. Hydrophilic groups such as hydroxyl groups, amino groups, and carboxyl groups are connected to its molecular chain segments, which can absorb hundreds or even thousands of times its own weight of water to achieve the expansion function in a rainy environment. In addition, its internal cross-linked structure and hydrogen bonds will limit the entry of water molecules into the network, so that it will not expand infinitely. When in a dry environment, the water-absorbing resin will gradually lose water to achieve morphological recovery, and can reciprocate to achieve a cycle of swelling when exposed to water and recovery when dry.

[0018] In order to make the water-absorbing resin compatible with the marking system, the copolymerization reaction of the comonomer St and the water-absorbing resin was achieved through an initiator and a cross-linking agent in the study, so that the copolymerization product can be compatible with the matrix resin system in the marking while maintaining the hydrophilic properties. The functions of the initiator and the cross-linking agent of the present invention include respectively realizing the cross-linking of AA and AM to form a water-absorbing resin, and realizing the copolymerization of the water-absorbing resin and St. The functions of the inorganic additives in this technology include respectively maintaining the thixotropy and increasing the wear resistance of the marking body, and can also enhance the water absorption and expansion of the expandable resin, and improve the overall mechanical strength and thermal stability.

[0019] The expandable resin in the road marking of the present invention is respectively present in the road marking primer and the road marking body. The primer is located at the bottom of the road marking and can first contact the road surface water, so as to ensure that the expansion of the road marking is prominent from the bottom. In the road marking body, the filler and the expandable resin are pre-mixed, so that the expandable resin is more easily deposited on the bottom layer of the road marking under the action of the high specific gravity of the filler, so that the expandable resin absorbs water from the bottom, thereby better realizing the water swelling and enhanced display function.

[0020] 2. Reasonable combination of glass beads to achieve better reflective performance Traditional road markings use the national standard No. 1 beads for internal mixing and surface spreading. This unreasonable particle size distribution will cause the surface glass beads to be worn out in a short period of time, while the internal mixed glass beads sink to the bottom of the road marking and cannot be ground out for a certain period of time, resulting in a "break" in the working of the glass beads. In addition, the pure No. 1 beads will cause the wet retroreflective brightness coefficient of the road marking to be extremely low, resulting in no reflective effect on rainy days.

[0021] The internally mixed glass beads and surface-sprinkled glass beads in the markings of the present invention are scientifically planned and reasonably matched, thereby ensuring the efficient reflection of the markings even in adverse environments such as rainy nights to the greatest extent. First, on rainy nights and in humid environments, large-diameter glass beads can significantly improve the retro-reflective effect of the markings compared to smaller-diameter glass beads, so the surface-sprinkled and internally mixed markings of the present invention contain large-diameter No. 4 rainy night glass beads. Since large glass beads are usually subjected to greater torque, they are easy to fall off the markings, resulting in a sharp decrease in the retroreflection coefficient, so the markings of the present invention incorporate No. 1 surface-sprinkled and No. 2 internally mixed glass beads into the surface-sprinkled and internally mixed glass beads, respectively.

[0022] The particle size range of No. 1 surface-sprinkled glass beads is mainly 20-140 mesh, of which the mass fraction of 30-50 mesh is 30-75%, which is the mainstream particle size range. The particle size range of No. 2 internally mixed glass beads is mainly 30-100 mesh, of which the mass fraction of 30-50 mesh is 50-90%, which is the dominant particle size range. Therefore, on the whole, the particle size range of No. 1 surface-sprinkled glass beads is wider than that of No. 2 internally mixed glass beads, and the content of relatively large-diameter beads in No. 1 surface-sprinkled glass beads is less than that in No. 2 internally mixed glass beads. The ratio requirements of the lower limit and upper limit of No. 4 rainy night glass beads in the marking line of the present invention in the surface-sprinkled and internally mixed glass beads can, on the one hand, better realize direct light reflection, and on the other hand, ensure the state balance of the glass beads in the two states of surface-sprinkling and internally mixed, thereby avoiding the floating / settling phenomenon of the beads in the marking line, and also avoiding the "break window" of the glass beads working. This reasonable ratio of glass beads of different particle sizes makes the marking line have good reflective performance while having a longer service life.

[0023] In summary, the water-swelling property of the expandable resin and the reasonable matching of the glass beads realize the enhanced display function of the road marking of the present invention in rainy days, and have the technical advantages of high retroreflective brightness coefficient and long-lasting reflective effect.

[0024] Additional aspects and advantages of the invention will become apparent from the following description, or may be learned by practice of the invention. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0027] Embodiment 1 The preparation method of the expandable resin is as follows: 50 parts of acrylic acid and 50 parts of acrylamide are added to the solvent DMSO and mixed evenly; then 2 parts of ammonium sulfate, 1 part of N,N methylene bisacrylamide and 40 parts of styrene are added, and after mixing, 3 parts of clay are added and dispersed evenly. The above mixture is placed in a constant temperature water bath at 80°C for polymerization reaction for 30 minutes, and then the obtained gel polymer is taken out and immersed in water to achieve solvent replacement with DMSO, and then the immersed polymer is dried in a blast drying oven for 24 hours to obtain a dried resin. The dried resin is crushed and ground into powder, and the preparation of the expandable resin is completed.

[0028] (1) Preparation work: First, carry out preparatory work such as cleaning the road surface and laying out the lines.

[0029] (2) Primer construction: Add 1.5 parts of expandable resin to 15 parts of primer material, mix evenly, and apply primer three times. Subsequent construction can be carried out only after the primer is dry.

[0030] (3) Road marking construction: ① Pre-mix 25 parts of heavy calcium powder and 1.5 parts of expandable resin; ② Take samples by weight, stir 15 parts of C5 petroleum resin, 10 parts of PE wax, and 10 parts of rutile titanium dioxide in a heating kettle until they are molten, then add 12 parts of internal mixed glass beads (10% of No. 4 rainy night glass beads with a particle size distribution of 14-30 mesh and 90% of No. 2 glass beads with a particle size distribution of 30-100 mesh, and the roundness of the glass beads must be ≥85%), a mixture of heavy calcium powder and expandable resin, and 10 parts of DOP, and mix them evenly to obtain a road marking material; ③ Mark the road marking material obtained above (mark on the primer), then sprinkle 18 parts of cloth-sprinkled glass beads (40% of No. 4 rainy night glass beads with a particle size distribution of 14-30 mesh and 60% of No. 1 glass beads with a particle size distribution of 20-140 mesh, and the roundness of the glass beads must be ≥85%), and complete the road marking construction after cooling and forming.

[0031] Comparative Example 1 (1) Preparation work: First, carry out preparatory work such as cleaning the road surface and laying out the lines.

[0032] (2) Primer application: Apply the primer to the road surface to be marked three times. After the primer is dry, proceed with the marking application.

[0033] (3) Road marking construction: 15 parts of C5 petroleum resin, 10 parts of PE wax, 10 parts of DOP, 12 parts of internally mixed glass beads, 10 parts of titanium dioxide, and 25 parts of heavy calcium powder are placed in a heating kettle and stirred evenly until they are molten to obtain the road marking material. The road marking material is then applied to the line (applied on the primer), and then 18 parts of cloth-sprinkled glass beads are sprinkled. After cooling and forming, the road marking construction is completed.

[0034] Embodiment 2 The preparation method of the expandable resin is as follows: 50 parts of acrylic acid and 50 parts of acrylamide are added to the solvent DMSO and mixed evenly; then 2 parts of ammonium sulfate, 1 part of N,N methylene bisacrylamide and 40 parts of styrene are added, and after mixing, 3 parts of clay are added and dispersed evenly. The above mixture is placed in a constant temperature water bath at 80°C for polymerization reaction for 30 minutes, and then the obtained gel polymer is taken out and immersed in water to achieve solvent replacement with DMSO, and then the immersed polymer is dried in a blast drying oven for 24 hours to obtain a dried resin. The dried resin is crushed and ground into powder, and the preparation of the expandable resin is completed.

[0035] (1) Preparation work: First, carry out preparatory work such as cleaning the road surface and laying out the lines.

[0036] (2) Primer construction: Add 1.5 parts of expandable resin to 15 parts of primer material, mix evenly, and apply primer three times. Subsequent construction can be carried out only after the primer is dry.

[0037] (3) Road marking construction: ① Pre-mix 25 parts of heavy calcium powder and 1.5 parts of expandable resin; ② Take samples by weight, stir 15 parts of C5 petroleum resin, 10 parts of PE wax and 10 parts of lead chrome yellow in a heating kettle until they are molten, then add 12 parts of internal mixed glass beads (10% of No. 4 rainy night glass beads with a particle size distribution of 14-30 mesh and 90% of No. 2 glass beads with a particle size distribution of 30-100 mesh, and the roundness of the glass beads must be ≥85%), a mixture of heavy calcium powder and expandable resin and 10 parts of DOP, and mix them evenly to obtain a road marking material; ③ Mark the road marking material obtained above (mark on the primer), then add 18 parts of surface-sprinkled glass beads (40% of No. 4 rainy night glass beads with a particle size distribution of 14-30 mesh and 60% of No. 1 glass beads with a particle size distribution of 20-140 mesh, and the roundness of the glass beads must be ≥85%), and complete the road marking construction after cooling and forming.

[0038] Comparative Example 2 The material composition of a road marking material is:

[0039] (1) Preparation work: First, carry out preparatory work such as cleaning the road surface and laying out the lines.

[0040] (2) Primer application: Apply the primer to the road surface to be marked three times. After the primer is dry, proceed with the marking application.

[0041] (3) Road marking construction: 16 parts of C5 petroleum resin, 10 parts of PE wax, 10 parts of DOP, 12 parts of internally mixed glass beads, 10 parts of lead chrome yellow, and 24 parts of heavy calcium powder are placed in a heating kettle and stirred evenly until they are molten to obtain the road marking material. The road marking material is then applied to the road (applied on the primer), and 18 parts of surface-sprinkling glass beads are then sprinkled on the surface. After cooling and forming, the road marking construction is completed.

[0042] The test results of compressive strength, abrasion resistance, dry and wet retroreflective brightness coefficient of the newly applied markings and the dry and wet retroreflective brightness coefficient of the markings after 10 months of use are shown in Table 1. The test methods are in accordance with JT / T280-2022 and GB / T16311-2024.

[0043] The results in the table show that the dry and wet state retroreflective brightness coefficient of the marking line of the present invention is significantly higher than that of the traditional technology both at the beginning and during use, and has a good reflective effect.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may also have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rainy day enhanced display type road marking material, characterized by: The raw materials of the material include 10 to 30 parts of base resin, 5 to 15 parts of wax, 30 to 50 parts of glass beads, 5 to 15 parts of pigment, 10 to 30 parts of filler, 5 to 15 parts of plasticizer and 0.1 to 10 parts of expansion resin.

2. The rainy day enhanced display type road marking material according to claim 1, characterized in that: The base resin includes one or a combination of C5 petroleum resin, rosin resin, EVA resin, phenolic resin, polyamide resin, ABS resin, acrylic resin and petroleum resin.

3. The rainy day enhanced display type road marking material according to claim 1, characterized in that: The wax includes one or a combination of PE wax, FT wax and oxidized PE wax.

4. The rainy day enhanced display type road marking material according to claim 1, characterized in that: The glass beads include surface-scattered glass beads and internally mixed glass beads, the ratio of the surface-scattered glass beads to the internally mixed glass beads is 5~8:2~5, and the roundness of the glass beads must be ≥85%; the surface-scattered glass beads include No. 4 Rainy Night glass beads with a particle size distribution mainly of 14~30 meshes and No. 1 surface-scattered glass beads with a particle size distribution mainly of 20~140 meshes, among which No. 4 Rainy Night glass beads account for no less than 30%; the internally mixed glass beads include No. 4 Rainy Night glass beads with a particle size distribution mainly of 14~30 meshes and No. 2 internally mixed glass beads with a particle size distribution mainly of 30~100 meshes, among which No. 4 Rainy Night glass beads account for no more than 10% of the total glass beads.

5. The rainy day enhanced display type road marking material according to claim 1, characterized in that: The pigment includes one or a combination of rutile titanium dioxide, titanium dioxide, zinc oxide, lead chrome yellow, titanium yellow, organic yellow pigment, iron oxide, titanium cyan blue, iron oxide black and permanent red.

6. The rainy day enhanced display type road marking material according to claim 1, characterized in that: The filler includes one or a combination of calcium carbonate, talcum powder, silica powder, calcium sand, heavy calcium powder, quartz sand and glass sand.

7. The rainy day enhanced display type road marking material according to claim 1, characterized in that: The plasticizer includes one or a combination of phthalates, vegetable oil and mineral oil.

8. The rainy day enhanced display type road marking material according to claim 1, characterized in that: The main materials of the expandable resin include 200-500 parts of solvent, 100 parts of hydrophilic monomer, 20-50 parts of comonomer, 1-5 parts of initiator, 1-5 parts of crosslinking agent and 1-10 parts of inorganic additive; the solvent is DMSO; the hydrophilic monomer is acrylic acid AA and acrylamide AM; the comonomer is styrene; the initiator is one or a combination of ammonium persulfate, potassium persulfate and azobisisobutyronitrile; the crosslinking agent is N,N-methylenebisacrylamide MBA; the inorganic additive is one or a combination of clay, bentonite, fly ash and glass beads.

9. The construction method of the rainy day enhanced display type road marking material according to claim 1, characterized in that: The specific steps of the construction method are: S1. Preparation: First, clean the road surface and lay out the lines and position the lines; S2. Primer application: Add the intumescent resin to the primer material and mix well before applying the primer. The number of applications should be no less than 2. Subsequent construction can be carried out only after the primer is dry. S3. Road marking construction: ① Mix the filler and the remaining expandable resin in advance; ② Take samples by weight, stir the base resin, wax and pigment in a heating kettle until they are molten, add the internal mixed glass beads, the filler and the expandable resin mixture and the plasticizer in turn, mix them evenly to obtain the road marking material; ③ Mark the road marking material obtained, then sprinkle the surface spreading glass beads, and complete the road marking construction after cooling and forming.

10. The construction method of the rainy day enhanced display type road marking material according to claim 9, characterized in that: The ratio of the expandable resin to the primer material in S2 is in the range of 0.1-8%; the ratio of the filler to the expandable resin in S3① is 10-30:0.1-10, and the expandable resin accounts for no more than 6% of the marking material.

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