CN113136130A

CN113136130A - Hot-melt type reflective marking paint and preparation method thereof

Info

Publication number: CN113136130A
Application number: CN202110536081.7A
Authority: CN
Inventors: 周炜; 雷鸣; 魏中华
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-07-20

Abstract

The invention discloses a hot-melt type reflective marking coating and a preparation method thereof, belonging to the technical field of hot-melt marking coatings. The hot-melt marking paint disclosed by the invention is composed of the following raw materials in parts by weight: 20-25 parts of C5 petroleum resin, 3-9 parts of pigment, 5-15 parts of talcum powder, 30-40 parts of quartz sand, 25-35 parts of glass beads and 1-2 parts of plasticizer. The hot-melt type reflective marking paint is obtained by uniformly mixing quartz sand, talcum powder and glass beads, and then sequentially adding pigment, C5 petroleum resin and plasticizer for uniform mixing. The hot-melt type reflective marking coating prepared by the invention has the advantages of good wear resistance, high compressive strength, high softening point, high density, good water resistance and alkali resistance; the preparation method is simple, easy to operate, low in cost and suitable for industrial large-scale production; the used raw materials are safe and environment-friendly, do not relate to polluting substances, and accord with the concept of green and environment protection.

Description

Hot-melt type reflective marking paint and preparation method thereof

Technical Field

The invention relates to the technical field of hot-melt marking paint, in particular to hot-melt type reflective marking paint and a preparation method thereof.

Background

Traffic is an artery of national economy, and the development of the national economy cannot be separated from modern traffic. The reflective road traffic marking is one of the most common traffic safety facilities, can indicate a driving road for a driver at night, improves the driving efficiency, and has the effect of playing a key role in ensuring the traffic safety.

The hot-melt road marking coating in the marking coating applied in China is dominant and accounts for about 80 percent. However, the quality of the current hot-melt pavement marking paint can not keep up with the rapid development of the traffic industry, and the problems that the softening point of the marking is low, the wear resistance is poor, the chromaticity can not meet the visual recognition requirement of drivers at night and the like are particularly shown. The national department of transportation also carries out special work for controlling the quality of the road traffic marking correspondingly to the road marking, aims to further improve the quality level of the road traffic marking, improve the traffic safety guarantee capability of the road and better meet the travel demands of people, and therefore, has great significance in carrying out the proportion optimization research and the performance analysis of the hot-melt type marking coating.

Based on the technical problems of the hot-melt reflective road marking coating in the prior art, a hot-melt marking coating with high softening point, good wear resistance, excellent comprehensive performances such as density, water resistance, alkali resistance and compressive strength needs to be developed to solve the problems in the prior art.

Disclosure of Invention

The invention aims to provide a hot-melt type reflective marking coating and a preparation method thereof, which are used for solving the problems in the prior art, so that the hot-melt marking coating has the characteristics of high softening point, good wear resistance, high density, good compressive strength, and excellent water resistance and alkali resistance.

In order to achieve the purpose, the invention provides the following scheme:

one purpose of the invention is to provide a hot-melt type reflective marking paint, which is prepared from the following raw materials in parts by weight: 20-25 parts of C5 petroleum resin, 3-9 parts of pigment, 5-15 parts of talcum powder, 30-40 parts of quartz sand, 25-35 parts of glass beads and 1-2 parts of plasticizer.

Further, the coating is prepared from the following raw materials in parts by weight: 20 parts of C5 petroleum resin, 3 parts of pigment, 10 parts of talcum powder, 35 parts of quartz sand, 30 parts of glass beads and 2 parts of plasticizer.

Further, the glass beads are one or two of glass beads with the particle size of 0.3-0.6mm or 0.15-0.3 mm.

Further, the pigment is titanium dioxide.

Further, the titanium dioxide is anatase type titanium dioxide.

Further, the plasticizer is dioctyl phthalate.

Further, the talcum powder is ultrafine powder.

Furthermore, the mesh number of the talcum powder is 3000 meshes.

Furthermore, the mesh number of the quartz sand is 40-80 meshes.

The invention also aims to provide a preparation method of the hot-melt type reflective marking paint, which comprises the following steps:

step 1, uniformly mixing quartz sand, talcum powder and glass beads, and then adding a pigment to uniformly mix to obtain a first mixture;

step 2, adding C5 petroleum resin into the first mixture, and uniformly mixing to obtain a second mixture;

and 3, adding a plasticizer into the second mixture and uniformly mixing to obtain the hot-melt marking paint.

The principle of the hot-melt marking paint is as follows:

(1) the C5 petroleum resin is divided into three types of general type, blending type and colorless transparent type, and the average molecular weight is 1000-. Yellowish or light brown flaky or granular solid with relative density of 0.97-1.07. The softening point is 70-140 ℃, and the refractive index is 1.512. The C5 petroleum resin is a low molecular weight thermoplastic resin polymerized from olefin or cycloolefin fraction produced by cracking petroleum, and is produced by a continuous production process. The product has stable and reliable quality, light yellow transparent granular solid appearance, no smell, excellent solubility, intermiscibility, adhesion, water resistance, weather resistance, heat stability and chemical stability to acid and alkali. Petroleum resins are compatible with many solvents other than alcohols, and have good solubility in vegetable oils, natural resins, synthetic resins, plasticizers, and the like.

(2) The pigment can cover the color of the resin, and improve the mechanical strength, adhesive force, light resistance, weather resistance and the like of the coating film. The anatase titanium dioxide is selected as the pigment because the anatase titanium dioxide has high whiteness, strong covering power and low price.

(3) The quartz sand can increase the flexibility of the coating, improve the shielding effect of the coating, and improve the construction performance of the coating, so that the coating has good leveling property. The quartz sand selected by the invention is 40-80 meshes. The commonly used quartz sand has the mesh number range of 10-120 meshes, and because the mesh number is too low when the quartz sand is selected, namely the granularity of the quartz sand is larger, the resin can not well bond the quartz sand with other components when the coating is heated, so that the flowability of the coating is lower; and if the mesh number is higher, the particle size of the quartz sand is smaller, resulting in greater fluidity of the coating. Therefore, when the quartz sand wood is selected, the proper mesh number is selected as much as possible, so the quartz sand selected by the invention is 40-80 meshes.

(4) The talcum powder has the excellent characteristics of lubricity, anti-sticking property, flow aiding property, insulativity, high melting point, inactive chemical property, good covering power, softness, good luster, strong adsorption force and the like. The talc powder has the function of improving the fluidity of the coating, the higher the addition amount of the talc powder is, the better the fluidity of the coating is, but the too much addition amount of the talc powder can cause the surface of the coating to be sticky, the coating is not easy to dry, and the required drying time is prolonged.

(5) When the hot-melt type reflective road marking paint is prepared, the glass beads can be divided into pre-mixed glass beads and surface-scattered glass beads according to the construction process. According to the regulations of the national standard glass beads for road marking (GB/T24722-2009), the glass beads for road marking can be divided into three types of No. 1, No. 2 and No. 3 according to different particle size distribution, the particle size distribution is shown in Table 1, wherein the No. 1 glass beads are suitable for being used as glass beads scattered on the surface of hot-melt type, double-component and water-based road marking paint; the No. 2 glass beads are suitable for being used as pre-mixed glass beads of hot-melt type, double-component and water-based pavement marking coatings; the No. 3 glass beads are suitable for spreading glass beads on the surface of the solvent type pavement marking paint.

TABLE 1 particle size distribution of glass beads

The glass bead micro-beads are No. 2 premixed glass beads, are one or two of 0.15-0.3mm or 0.3-0.6mm in particle size, have a refractive index of more than or equal to 1.7 and a rounding rate of more than or equal to 80 percent. The glass beads are premixed in the paint, so that the glass beads premixed in the paint can be continuously exposed after the vehicle tire is continuously worn in the use process of the marking line, and the marking line can be ensured to keep a light reflecting effect in the whole use process.

(6) The content of the auxiliary agent in the hot-melt road marking paint is the lowest, but the function of the auxiliary agent is very important, and the auxiliary agent can improve the production process, keep the storage stability, improve the construction condition and improve the product quality. The auxiliary agent is plasticizer dioctyl phthalate (DOP), and quartz sand and talcum powder in the filler are easy to agglomerate, weak in flexibility, easy to oxidize resin and poor in weather resistance, so that a proper amount of plasticizer DOP is added to ensure the weather resistance of the coating and enhance the dispersibility of the filler.

The hot-melt marking paint prepared by adopting the raw materials and matching with proper parts by weight has the characteristics of high softening point, good wear resistance, high density, good compressive strength, and excellent water resistance and alkali resistance.

The invention discloses the following technical effects:

(1) the hot-melt marking paint prepared by the invention has the advantages of good wear resistance, high compressive strength, high softening point, high density, good water resistance and alkali resistance;

(2) the preparation method of the hot-melt marking paint is simple, easy to operate, low in cost and suitable for industrial large-scale production;

(3) the raw materials used in the invention are safe and environment-friendly, do not relate to polluting substances, and accord with the concept of green environmental protection.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

The "parts" in the present invention are all parts by mass unless otherwise specified.

Example 1

The hot-melt type reflective marking paint of the embodiment is composed of the following raw materials: 22.5Kg of C5 petroleum resin (general purpose type), 3Kg of anatase titanium dioxide, 10Kg of talcum powder (3000 meshes), 35Kg of quartz sand (40 meshes), 17.5Kg of glass beads with the particle size of 0.3-0.6mm, 10Kg of glass beads with the particle size of 0.15-0.3mm, and 2Kg of plasticizer (dioctyl phthalate) DOP.

Step 1, sequentially putting quartz sand, talcum powder and glass beads into a mechanical stirrer, starting a stirring device, stirring for 15 minutes at a rotating speed of 150r/min, and fully and uniformly mixing the inorganic substances; then putting the titanium dioxide into a mechanical stirrer, and stirring for 10 minutes at the rotating speed of 150r/min to obtain a first mixture;

step 2, adding C5 petroleum resin into the first mixture for multiple times in small amount at the rotation speed of 250r/min, and stirring for 15 minutes to obtain a second mixture;

and 3, adding a plasticizer DOP into the auxiliary agent spraying device, spraying the DOP into the second mixture through the auxiliary agent spraying device, adjusting the rotating speed of a mechanical stirrer to be 250r/min after the DOP is completely sprayed, and stirring for 30min to obtain the hot-melt type light reflecting marking paint.

Example 2

The hot-melt type reflective marking paint of the embodiment is composed of the following raw materials: 20Kg of C5 petroleum resin, 3Kg of anatase titanium dioxide, 10Kg of talcum powder (3000 meshes), 35Kg of quartz sand (60 meshes), 20Kg of glass beads with the particle size of 0.3-0.6mm, 10Kg of glass beads with the particle size of 0.15-0.3mm and 2Kg of plasticizer (dioctyl phthalate) DOP.

Step 1, sequentially putting quartz sand, talcum powder and glass beads into a mechanical stirrer, starting a stirring device, stirring for 18 minutes at a rotating speed of 150r/min, and fully and uniformly mixing the inorganic substances; then putting the titanium dioxide into a mechanical stirrer, and stirring for 10 minutes at the rotating speed of 150r/min to obtain a first mixture;

Example 3

The hot-melt type reflective marking paint of the embodiment is composed of the following raw materials: 22.5Kg of C5 petroleum resin, 3Kg of anatase titanium dioxide, 10Kg of talcum powder (3000 meshes), 35Kg of quartz sand (80 meshes), 15Kg of glass beads with the particle size of 0.3-0.6mm, 12.5Kg of glass beads with the particle size of 0.15-0.3mm and 2Kg of plasticizer (dioctyl phthalate) DOP.

Step 1, sequentially putting quartz sand, talcum powder and glass beads into a mechanical stirrer, starting a stirring device, stirring at a rotating speed of 150r/min for 20 minutes to fully and uniformly mix the inorganic substances; then putting the titanium dioxide into a mechanical stirrer, and stirring for 10 minutes at the rotating speed of 150r/min to obtain a first mixture;

Example 4

The hot-melt type reflective marking paint of the embodiment is composed of the following raw materials: 20Kg of C5 petroleum resin, 3Kg of anatase titanium dioxide, 10Kg of talcum powder (3000 meshes), 35Kg of quartz sand (80 meshes), 15Kg of glass beads with the particle size of 0.3-0.6mm, 15Kg of glass beads with the particle size of 0.15-0.3mm and 2Kg of plasticizer (dioctyl phthalate) DOP.

Preparation steps 1-3 are the same as in example 1.

Example 5

The hot-melt type reflective marking paint of the embodiment is composed of the following raw materials: 25Kg of C5 petroleum resin, 6Kg of anatase titanium dioxide, 15Kg of talcum powder (3000 meshes), 30Kg of quartz sand (80 meshes), 25Kg of glass microspheres with the particle size of 0.3-0.6mm and 1Kg of plasticizer (dioctyl phthalate) DOP.

Preparation steps 1-3 are the same as in example 1.

Example 6

The hot-melt type reflective marking paint of the embodiment is composed of the following raw materials: 25Kg of C5 petroleum resin, 9Kg of anatase titanium dioxide, 5Kg of talcum powder (3000 meshes), 40Kg of quartz sand (80 meshes), 35Kg of glass microspheres with the particle size of 0.15-0.3mm and 1.5Kg of plasticizer (dioctyl phthalate) DOP.

Preparation steps 1-3 are the same as in example 1.

Comparative example 1

The difference from the example 4 is that the raw material also comprises 55Kg of ground calcium carbonate.

Comparative example 2

The difference from the example 4 is that the raw material also comprises 0.5Kg of white oil.

Comparative example 3

The difference from the example 4 is that the raw material also comprises 0.5Kg of white wax.

The hot-melt type reflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 were subjected to a compressive strength test

The test was carried out according to the test method specified in pavement marking paint (JT/T280-2004): the hot-melt type reflective marking paint prepared in each example is poured into 3 paint compression-resistant test blocks with the thickness of 20mm multiplied by 20mm, the test blocks are placed for 24 hours at the standard test temperature for compression test, the precision of an electronic universal material testing machine is not lower than 0.5 grade, the preload is 10N, and the loading speed is 30 mm/min. The standard specifies: the compression strength of the hot-melt common type and reflective type marking paint is more than or equal to 12 MPa.

The results of the compressive strength of the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 are shown in table 2:

TABLE 2 compression Strength test results of Hot melt type reflective marking coating

Item	Sample 1(MPa)	Sample 2(MPa)	Sample 3(MPa)	Mean value
					Example 1	22.29	24.76	23.65	23.57
Example 2	24.68	21.95	22.72	23.12
					Example 3	26.38	23.46	24.48	24.77
Example 4	25.86	28.83	26.36	27.02
					Example 5	22.36	26.23	24.52	24.37
Example 6	22.60	23.85	23.10	23.18
					Comparative example 1	12.29	14.76	13.65	13.57
Comparative example 2	22.68	19.95	20.72	21.12
					Comparative example 3	19.38	16.46	17.48	17.77

As can be seen from Table 2, the hot-melt type reflective marking coatings prepared in the embodiments 1-6 of the invention have the compression strength test values of more than or equal to 12MPa, the average compression strength of the test blocks is 24.34MPa, which is superior to that of the comparative examples 1-3, and the hot-melt type reflective marking coatings meet the standard requirements and have better compression resistance.

The softening point test was performed on the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3

The softening point was determined by the "determination of the softening point of the base for paints and varnishes" method: the determination was carried out by the Ring and ball method (GB/T9284), and two softening points were determined for each example, and averaged. According to the requirements of pavement marking paint (JT/T280-2004), the softening points of the hot-melt common type and the hot-melt reflective type are 90-125 ℃; the softening point of the hot melting protrusion type is more than or equal to 100 ℃.

The softening points of the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 were as shown in table 3:

TABLE 3 softening point test results for hot melt retroreflective marking coatings

Item	Sample 1 (. degree. C.)	Sample 2 (. degree. C.)	Mean (. degree. C.)
				Example 1	111	110.5	110.75
Example 2	112.65	112.88	112.765
				Example 3	111.8	111.8	111.8
Example 4	112.55	112.3	112.425
				Example 5	111.5	110.6	111.05
Example 6	110.9	110.6	110.75
				Comparative example 1	108	107.5	107.75
Comparative example 2	109.65	109.88	109.765
				Comparative example 3	105.8	105.8	105.8

As can be seen from Table 3, the hot-melt type reflective marking coatings prepared in examples 1-6 of the present invention have a higher softening point, an average value of 111.59 ℃, are superior to those of comparative examples 1-3, meet the requirements of national regulations, and can be well applied to roads.

Water resistance test was performed on the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3

The water resistance of the hot-melt reflective marking paint was measured according to the determination of Water resistance of coating film (GB/T1733). According to the road marking paint (JT/T280-2004): the abnormal phenomenon should not occur after soaking in water for 24 hours.

The hot melt type retroreflective markings prepared in examples 1-6 and comparative examples 1-3 had water resistance, and the test results are shown in table 4.

TABLE 4 Water resistance test results for Hot melt marking coatings

Item

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Comparative example 1

Comparative example 2

Comparative example 3

Water resistance

No abnormality

As can be seen from Table 4, the hot-melt type reflective marking coatings prepared in examples 1 to 6 of the present invention have no abnormal water resistance test results, have good water resistance, and meet the requirements of national regulations.

Alkali resistance test was performed on the hot-melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3

The alkali resistance of the hot-melt type reflective marking paint is measured according to the determination of alkali resistance of architectural coating (GB/T9265). According to the road marking paint (JT/T280-2004): the calcium hydroxide saturated solution is soaked for 24 hours without abnormal phenomenon.

The alkali resistance of the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 was as shown in table 5.

TABLE 5 alkali resistance test results of hot melt type reflective marking paint

Item

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Comparative example 1

Comparative example 2

Comparative example 3

Alkali resistance

No abnormality

As can be seen from Table 5, the hot-melt type reflective marking coatings prepared in examples 1-6 of the present invention have no abnormal alkali resistance test results, have good alkali resistance, and meet the requirements of national regulations.

Density measurement was performed on the hot-melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3

Each example was cast 3 samples of 20mm by 20mm, cooled to room temperature, as specified in road marking paint (JT/T280-2004). The protruding portions of the end surfaces were shaved off with a slightly heated spatula and the sides were ground flat with a No. 100 sandpaper. After 24h of standing, the sample was measured with a vernier caliper (to the nearest 0.1mm) and used as a test block. The 3 test pieces were weighed to the nearest 0.05g and the density of the coating was calculated from the formula density (mass/volume).

The densities of the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 were measured, and the test results are shown in table 6.

TABLE 6 Density test results of Hot melt type reflective marking coating

Item	Sample 1 (g/cm)³)	Sample 2 (g/cm)³)	Sample 3 (g/cm)³)	Mean value
					Example 1	1.956	1.961	1.960	1.959
Example 2	1.908	1.915	1.913	1.912
					Example 3	1.975	1.971	1.964	1.970
Example 4	2.025	2.042	2.045	2.037
					Example 5	1.923	1.935	1.942	1.933
Example 6	1.936	1.912	1.914	1.921
					Comparative example 1	1.902	1.908	1.912	1.907
Comparative example 2	1.910	1.921	1.941	1.924
					Comparative example 3	1.913	1.912	1.95	1.925

Watch with watch6, the density test results of the hot-melt type reflective marking coatings prepared in the embodiments 1-6 of the invention are all no abnormal, and the densities are all 1.8-2.3g/cm³Within the range, the method meets the national standard requirements.

The hot-melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 were subjected to abrasion resistance test

The abrasion resistance of the hot-melt type retroreflective marking paint was measured in accordance with the method for measuring abrasion resistance of paint film (GB/T1768). A No. 100 grinding wheel is selected, the load is 1000g, and the weight loss is measured after the rotation of 200 turns. According to the road marking paint (JT/T280-2004): the abrasion weight loss of the hot melt should be less than or equal to 80 mg.

The abrasion resistance of the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 was as shown in table 7.

TABLE 7 abrasion resistance test results of hot melt type reflective marking paint

As can be seen from Table 7, the wear resistance test results of the hot-melt type reflective marking coatings prepared in the embodiments 1-6 of the present invention are all no abnormal, and are all less than 80mg, which meet the requirements of national regulations.

The hot melt marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 were subjected to fluidity test

The fluidity of the hot-melt type reflective paint is measured according to pavement marking paint (JT/T280-2004), and the fluidity of the hot-melt type road reflective marking is specified to meet 35s +/-10 s. The specific determination method is as follows: heating the fluidity measuring cup to about 200 ℃ and keeping for 1 h; adding the hot-melt coating into a hot-melt cup, placing the hot-melt coating on a heating furnace, heating the hot-melt coating to 180-200 ℃ under a stirring state, and melting the hot-melt coating until the coating is melted to be in a construction state, so that the upper part and the lower part of the coating are completely uniform and consistent and have no bubbles. Immediately pouring the melted coating into a preheated fluidity measuring cup, opening an outflow opening and simultaneously pressing a stopwatch to record time; recording the time of the paint flow-off immediately when the paint flow-off is finished; the test is repeated for three times, and the average value of the test piece after the test piece is completely flowed is the fluidity.

The fluidity of the hot melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 was measured, and the test results are shown in table 8.

TABLE 8 fluidity test results of the hot melt type reflective marking paint

As can be seen from Table 8, the test results of the fluidity of the hot melt type reflective marking coatings prepared in the embodiments 1-6 of the present invention are all no different, and the fluidity is good, so that the hot melt type reflective marking coatings meet the requirements of national regulations.

The hot-melt type reflector marking coatings prepared in examples 1-6 and comparative examples 1-3 were subjected to reflection performance verification:

the retroreflective performance of the reticle was verified by measuring the retroreflective brightness coefficient of the reticle. According to the regulation of the initial retroreflection brightness coefficient and test method of the newly-scribed pavement marking (GB/T21383-2008), the initial retroreflection brightness coefficient of the white reflector marking should not be lower than 150 mcd.m^-2·lx^-1。

The retroreflective luminance coefficients of the hot-melt type retroreflective marking paints prepared in examples 1 to 6 and comparative examples 1 to 3 were measured, and the test results are shown in Table 9.

TABLE 9 results of the measurement of coefficient of retroreflection luminance (unit: mcd. m) for the hot-melt type retroreflective marking paint^-2·lx^-1)

As can be seen from Table 9, the results of the test on the coefficient of retroreflection luminance of the hot-melt type retroreflective marking paints prepared in examples 1 to 6 of the present invention are all no abnormal and are all larger than 150 mcd.m^-2·lx^-1And meets the national standard requirements.

In conclusion, the hot-melt type reflective marking coating disclosed by the invention has the characteristics of good fluidity, high compressive strength, high softening point, good wear resistance, good water resistance, good alkali resistance and the like, and is a product capable of improving the performance of a pavement marking material and reducing the abrasion of pavement markings. After the hot-melt marking paint disclosed by the invention is used for marking a road, the density is high, the wear resistance is good, and the service life of the road marking can be effectively prolonged. When the hot-melt marking paint is constructed, large-scale equipment is not needed, the construction is simple and convenient, the operation is easy, the drying time of the sample non-stick tire of the examples 1-6 and the samples of the comparative examples 1-3 is less than 3min, and the drying time meets the regulation of the Standard road marking paint (JT/T-280-2004). The vehicle can be driven after marking lines on the worn road surface are marked, the road surface marking lines can be repaired at any time and any place, the original road surface cannot be damaged, and the normal traffic of traffic cannot be influenced. Therefore, the hot-melt marking paint has wider application prospect.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. The hot-melt type reflective marking paint is characterized by comprising the following raw materials in parts by weight: 20-25 parts of C5 petroleum resin, 3-9 parts of pigment, 5-15 parts of talcum powder, 30-40 parts of quartz sand, 25-35 parts of glass beads and 1-2 parts of plasticizer.

2. The hot-melt type reflector marking paint as claimed in claim 1, wherein the paint is prepared from the following raw materials in parts by weight: 20 parts of C5 petroleum resin, 3 parts of pigment, 10 parts of talcum powder, 35 parts of quartz sand, 30 parts of glass beads and 2 parts of plasticizer.

3. The hot-melt type reflector marking paint as claimed in claim 1 or 2, wherein the glass beads are one or two of glass beads with a particle size of 0.3-0.6mm or 0.15-0.3 mm.

4. The hot-melt type reflective marking paint according to claim 1 or 2, wherein the pigment is titanium dioxide.

5. The hot-melt type reflective marking paint according to claim 4, wherein the titanium dioxide is anatase titanium dioxide.

6. The hot-melt type retroreflective marking paint according to claim 1 or 2, wherein the plasticizer is dioctyl phthalate.

7. The hot melt type reflective marking paint of claim 1, wherein the talc is an ultra fine powder.

8. The hot-melt type reflective marking paint as claimed in claim 1, wherein the mesh number of the quartz sand is 40-80 mesh.

9. The method for preparing the hot-melt type reflector marking paint as claimed in claim 1, which is characterized by comprising the following steps:

and 3, adding a plasticizer into the second mixture, and uniformly mixing to obtain the hot-melt type reflective marking paint.