阅读说明：本技术 一种反光型热熔标线涂料及其制备方法 (Reflective hot-melt marking paint and preparation method thereof ) 是由 戴创 刘战军 郑国云 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种反光型热熔标线涂料及其制备方法,属于标线涂料技术领域。本发明的反光型热熔标线涂料,包括如下重量份数的组分：碳五树脂13-18份、石蜡0.5-1.5份、EVA 0.3-1.5份、白油0.5-1.5份、石英砂20-30份、重钙粉20-30份、内混珠18-25份。本发明的反光型热熔标线涂料具有良好的热熔流动性,同时保持了良好的力学性能。本发明的标线涂料具有非常快的干燥速度,施工效率高,而且附着力强、耐磨性好、抗压强度高,大大提高了标线的使用寿命。进一步的,本发明的反光型热熔标线涂料的耐水性和耐碱性好,还具有良好的加热稳定性,能够适应各种不同的环境。(The invention discloses a reflective hot-melt marking coating and a preparation method thereof, belonging to the technical field of marking coatings. The invention relates to a reflective hot-melt marking paint which comprises the following components in parts by weight: 13-18 parts of carbon five resin, 0.5-1.5 parts of paraffin, 0.3-1.5 parts of EVA, 0.5-1.5 parts of white oil, 20-30 parts of quartz sand, 20-30 parts of heavy calcium powder and 18-25 parts of inner mixed bead. The reflective hot-melt marking paint disclosed by the invention has good hot-melt fluidity, and simultaneously keeps good mechanical properties. The marking paint disclosed by the invention has the advantages of very high drying speed, high construction efficiency, strong adhesive force, good wear resistance and high compressive strength, and the service life of the marking is greatly prolonged. Furthermore, the reflective hot-melt marking paint disclosed by the invention is good in water resistance and alkali resistance, also has good heating stability, and can adapt to various different environments.)

1. The reflective hot-melt marking paint is characterized in that: the composition comprises the following components in parts by weight: 13-18 parts of carbon five resin, 0.5-1.5 parts of paraffin, 0.3-1.5 parts of EVA, 0.5-1.5 parts of white oil, 20-30 parts of quartz sand, 20-30 parts of heavy calcium powder and 18-25 parts of inner mixed bead.

2. The retroreflective hot melt marking paint of claim 1, wherein: the reflective hot-melt marking paint comprises the following components in parts by weight: 15-18 parts of carbon five resin, 0.5-1.2 parts of paraffin, 0.5-1.5 parts of EVA, 0.5-1.2 parts of white oil, 25-29 parts of quartz sand, 20-28 parts of heavy calcium powder and 20-25 parts of inner mixed beads.

3. The reflective hot melt marking paint according to claim 1 or 2, wherein: the reflective hot-melt marking paint also comprises 0.1-0.35 weight part of reinforcing fiber, wherein the reinforcing fiber is at least one of polypropylene fiber, carbon fiber and glass fiber.

4. The retroreflective hot melt marking paint of claim 3, wherein: the reinforcing fiber is composed of at least one of carbon fiber and glass fiber and polypropylene fiber in a mass ratio of 1: 1-3.

5. The reflective hot melt marking paint according to claim 1 or 2, wherein: the reflective hot melt marking paint also comprises 0.5 to 1.6 weight parts of dioctyl phthalate.

6. The reflective hot melt marking paint according to claim 1 or 2, wherein: the reflective hot-melt marking paint also comprises 1.5-3 parts by weight of bentonite.

7. The reflective hot melt marking paint according to claim 1 or 2, wherein: the reflective hot-melt marking paint also comprises 1-2 parts by weight of polyurethane elastomer.

8. The preparation method of the reflective hot melt marking paint according to claim 1, characterized by comprising the following steps: the method comprises the following steps:

1) uniformly mixing carbon five resin and EVA to obtain a resin mixture;

uniformly mixing the inner mixed beads with partial white oil to obtain an inner mixed bead mixture, and then uniformly mixing the inner mixed bead mixture with a resin mixture, quartz sand and heavy calcium powder to obtain a premix;

2) uniformly mixing the premix prepared in the step 1) with paraffin and the rest white oil to obtain the product.

9. The method for preparing the reflective hot melt marking paint according to claim 8, wherein the method comprises the following steps: the step 1) of uniformly mixing the inner mixed bead mixture with the resin mixture, the quartz sand and the heavy calcium powder is to firstly uniformly mix the inner mixed bead mixture with the resin mixture to obtain a mixed light material, and then uniformly mix the mixed light material with the quartz sand and the heavy calcium powder to obtain a premix.

10. The method for preparing the reflective hot melt marking paint according to claim 8, wherein the method comprises the following steps: in the step 1), the quartz sand is dried before mixing until the moisture mass fraction is not more than 5%, and the coarse whiting powder is dried before mixing until the moisture mass fraction is not more than 0.5%.

Technical Field

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

Background

With the rapid development of highway construction in China, the consumption of the coating for road marking construction is increased more and more. In order to meet the specific requirements of different construction environments, the types and functions of the road marking paint are more and more diversified. The hot-melt type marking paint is convenient to use, melts by heating during construction, is coated on the ground by special equipment, and is solidified by physical condensation to form a marking.

The hot-melt road marking paint has high coating construction speed, can be used after about half hour of coating construction, and becomes the marking paint with the largest use amount on the current expressways and urban traffic roads due to the quick and convenient construction. The hot-melt road marking paint generally comprises thermoplastic resin, pigment and filler and other additives, wherein the reflective hot-melt marking paint also comprises a reflective material. The hot-melt type marking paint mainly utilizes the thermoplasticity of synthetic resin to have the characteristic of quick drying, and utilizes the hot melt of the synthetic resin to firmly bond the marking with the pavement. To improve the bond strength of hot melt type marking coatings, the proportion of hot melt resin in the coating is typically increased.

The Chinese patent with application publication number CN104231838A discloses a preparation method of an anti-pollution road marking paint, which comprises the following components in percentage by weight: 14-18% of quartz sand with the average particle size of 20 microns, 16-20% of calcium carbonate powder with the average particle size of 20 microns, 16-20% of mica powder with the average particle size of 10 microns, 6-8% of 320-mesh glass beads, 1.4-1.8% of polyethylene wax, 3-4% of EVA hot melt adhesive, 4-5% of titanium dioxide, 2-3% of W3 plasticizer, 2-3% of HG-613 fluorocarbon surfactant, 1-2% of GW150 antistatic agent and the balance of C5 petroleum resin; the preparation method comprises the following steps: 1) putting quartz sand, calcium carbonate powder, mica powder, glass beads and titanium dioxide into a mixer, and mixing for 2-4 hours to uniformly disperse the materials; 2) adding polyethylene wax, EVA hot melt adhesive and petroleum resin into a mixer, and mixing for 3-5 hours; 3) finally adding fluorocarbon surfactant, antistatic agent and the like, and mixing for 2-4 hours; 4) and (5) checking the mixing uniformity, and packaging after the mixture is qualified. The marking paint adopts C5 petroleum resin as the main thermoplastic resin in the paint, and has high bonding strength. However, the excessive content of the C5 petroleum resin in the marking paint affects the drying rate of the marking paint during the application, resulting in a long drying time.

Disclosure of Invention

Aiming at the defects in the prior art, the first object of the invention is to provide a reflective hot-melt marking paint which is high in drying speed and short in drying time.

The second purpose of the invention is to provide a preparation method of the reflective hot-melt marking paint, and the marking paint prepared by the method has good uniformity and high stability.

In order to achieve the first object, the invention provides the following technical scheme:

the reflective hot-melt marking paint comprises the following components in parts by weight: 13-18 parts of carbon five resin, 0.5-1.5 parts of paraffin, 0.3-1.5 parts of EVA, 0.5-1.5 parts of white oil, 20-30 parts of quartz sand, 20-30 parts of heavy calcium powder and 18-25 parts of inner mixed bead.

By adopting the technical scheme, the carbon five resin in the reflective hot-melt marking paint is also called carbon five petroleum resin, mainly adopts a byproduct cracked C5 raw material generated in the production process of an ethylene device, and is a glassy thermoplastic or viscous liquid resin polymer material obtained through polymerization reaction.

In the marking paint, the proportion of the resin, the quartz sand and the heavy calcium is reasonable, the content of the resin is neither too high nor too low, the inorganic filler can be fully wrapped and bonded by the resin after being heated and melted, the bonding strength among inorganic filler particles is improved, and the content of the resin can not cause overlong drying time of the marking paint. On the basis of fully utilizing the matching effect of the resin and the inorganic filler, the marking paint disclosed by the invention is short in drying time, high in construction efficiency, and higher in compressive strength and wear resistance.

The invention is further configured to: the reflective hot-melt marking paint comprises the following components in parts by weight: 15-18 parts of carbon five resin, 0.5-1.2 parts of paraffin, 0.5-1.5 parts of EVA, 0.5-1.2 parts of white oil, 25-29 parts of quartz sand, 20-28 parts of heavy calcium powder and 20-25 parts of inner mixed beads.

By adopting the technical scheme, the proportion of each component of the reflective hot-melt marking paint is further optimized, so that the proportion collocation of the components is more reasonable, the composite effect between the resin and the inorganic filler is fully exerted, and the comprehensive performance of the marking paint is further improved.

The invention is further configured to: the reflective hot-melt marking paint also comprises 0.1-0.35 weight part of reinforcing fiber, wherein the reinforcing fiber is at least one of polypropylene fiber, carbon fiber and glass fiber.

Through adopting above-mentioned technical scheme, because mixed pearl in having added in the marking coating, interior pearl self intensity of mixing is higher, but interior pearl of mixing is spherical structure, and after the marking coating solidifies, be unfavorable for improving the whole toughness of marking. After the reinforcing fibers are added, linear fiber materials are matched with the spherical inner mixed beads, so that the strength of the marked line can be improved, the toughness of the marked line can be greatly increased, and the comprehensive mechanical property of the marked line is improved.

The invention is further configured to: the reinforcing fiber is formed by mixing at least one of carbon fiber and glass fiber with polypropylene fiber in a mass ratio of 1: 1-3.

By adopting the technical scheme, the reinforcing fiber is compounded by adopting the organic fiber and the inorganic fiber, so that the reinforcing fiber has good compatibility with other organic components and inorganic components, and the bonding force between the reinforcing fiber and other components in the marking paint is improved. In addition, the reinforcing fiber is compounded by organic fiber and inorganic fiber, so that the characteristics of high strength of the inorganic fiber and toughness of the organic fiber can be fully exerted, and the comprehensive mechanical property of the marking is further improved.

The invention is further configured to: the reflective hot melt marking paint also comprises 0.5 to 1.6 weight parts of dioctyl phthalate.

By adopting the technical scheme, the plasticity of the marking paint can be improved by the dioctyl phthalate, and more importantly, the low-temperature performance of the marking paint can be improved after the dioctyl phthalate is added, so that the stability of the prepared marking in a low-temperature environment is greatly improved, and the environment adaptability of the marking paint is improved.

The invention is further configured to: the reflective hot-melt marking paint also comprises 1.5-3 parts by weight of bentonite.

By adopting the technical scheme, the bentonite is light in weight, has a complex porous structure and good adsorption performance, and is beneficial to improving the bonding compatibility of the inorganic filler and resin in the marking paint, so that the inorganic filler and the resin are dispersed more uniformly.

The invention is further configured to: the reflective hot-melt marking paint also comprises 1-2 parts by weight of polyurethane elastomer.

By adopting the technical scheme, the polyurethane elastomer has better wear resistance, the wear resistance of the finally prepared marking can be improved after the polyurethane elastomer is added, and the polyurethane elastomer is a thermoplastic elastomer and has good compatibility with resin in the marking paint, so that the dispersion uniformity of the polyurethane elastomer in the molten marking paint can be improved.

In order to achieve the second object, the invention provides the following technical scheme:

the preparation method of the reflective hot-melt marking paint comprises the following steps:

1) uniformly mixing carbon five resin and EVA to obtain a resin mixture;

uniformly mixing the inner mixed beads with partial white oil to obtain an inner mixed bead mixture, and then uniformly mixing the inner mixed bead mixture with a resin mixture, quartz sand and heavy calcium powder to obtain a premix;

2) uniformly mixing the premix prepared in the step 1) with paraffin and the rest white oil to obtain the product.

By adopting the technical scheme, when the marking paint is prepared, the inner mixed bead and a part of the white oil are uniformly mixed, and the white oil is wrapped on the surface of the inner mixed bead by utilizing the viscosity of the white oil, so that the binding capacity between the inner mixed bead and other components is improved, the inner mixed bead is convenient to disperse uniformly, and the prepared marking is uniform and stable in texture. According to the invention, the resin is mixed and then uniformly mixed with the inner mixed bead mixture, the quartz sand and the heavy calcium powder, so that the resins can be uniformly mixed, and the influence of inorganic fillers with larger particles such as quartz sand on the dispersion uniformity when the resins are added for multiple times is avoided.

The invention is further configured to: the step 1) of uniformly mixing the inner mixed bead mixture with the resin mixture, the quartz sand and the heavy calcium powder is to firstly uniformly mix the inner mixed bead mixture with the resin mixture to obtain a mixed light material, and then uniformly mix the mixed light material with the quartz sand and the heavy calcium powder to obtain a premix.

Through adopting above-mentioned technical scheme, with interior mixed bead mixture earlier with resin mixture misce bene, can utilize the white oil on interior mixed bead surface and resin bonding together, it is more even to make to disperse between interior mixed bead and the resin, further improves the homogeneity of coating.

The invention is further configured to: step 1), drying the quartz sand before mixing until the moisture mass fraction is not more than 5%, and drying the coarse whiting powder before mixing until the moisture mass fraction is not more than 0.5%.

By adopting the technical scheme, the quartz sand and the coarse whiting powder are dried and then mixed, so that the phenomenon that the inorganic filler is agglomerated to reduce the dispersion uniformity of the inorganic filler is avoided, and the influence of moisture in the material on the dispersion of the subsequently added white oil is favorably reduced.

In conclusion, the invention has the following beneficial effects:

firstly, the proportion of the resin and the inorganic filler in the reflective hot-melt marking paint is reasonable, so that the marking paint is ensured to have good fluidity, and the marking paint is enabled to keep good mechanical property. The marking paint disclosed by the invention has the advantages of very high drying speed, high construction efficiency, capability of keeping better comprehensive mechanical property, strong adhesive force, good wear resistance and high compressive strength, and the service life of the marking is greatly prolonged.

Secondly, the reflective hot-melt marking paint disclosed by the invention is good in water resistance and alkali resistance, can adapt to different environmental conditions, and also has good heating stability and better high-temperature performance. Moreover, the reflective hot-melt marking paint disclosed by the invention is good in impact resistance, and can be still not easily damaged after being used for a long time under severe working conditions.

Detailed Description

The present invention will be described in further detail with reference to examples.

The reflective hot-melt marking paint comprises the following components in parts by weight: 13-18 parts of carbon five resin, 0.5-1.5 parts of paraffin, 0.3-1.5 parts of EVA (ethylene-vinyl acetate copolymer), 0.5-1.5 parts of white oil, 20-30 parts of quartz sand, 20-30 parts of heavy calcium carbonate powder and 18-25 parts of inner mixed beads.

The carbon five resin is the carbon five petroleum resin, preferably, the molecular weight of the carbon five resin is 800-3000, and more preferably, the molecular weight of the carbon five resin is 2000-2500.

The granularity of the quartz sand is 80-325 meshes. Preferably, the granularity of the quartz sand is 140 meshes and 270 meshes. Further preferably, the granularity of the quartz sand is 200-270 meshes. Further preferably, the particle size of the quartz sand is 200 mesh. The mud content of the quartz sand is not more than 0.2 percent. Further preferably, the content of the mud in the silica sand is not more than 0.1%.

The granularity of the coarse whiting powder is 800-1000 meshes. The mass fraction of calcium carbonate in the coarse whiting powder is not less than 95 percent. Preferably, the coarse whiting powder has a particle size of 1000 mesh.

The inner mixed beads are hollow glass beads. The average particle diameter of the inner mixing beads is 40-120 μm. Preferably, the inner mixing beads have an average particle size of 40 μm. The true density is 0.20 +/-0.02 g/cm³. The bulk density is 0.12 +/-0.02 g/cm³。

The reflective hot melt marking paint also comprises 0.1 to 0.35 weight part of reinforcing fiber. The reinforcing fiber is at least one of polypropylene fiber, carbon fiber and glass fiber. The length of the reinforcing fiber is 2-5 mm. Preferably, the length of the reinforcing fibers is 2 mm. More preferably, the reinforcing fiber is formed by mixing at least one of carbon fiber and glass fiber with polypropylene fiber in a mass ratio of 1: 1-3. Preferably, the reinforcing fiber is formed by mixing carbon fiber, glass fiber and polypropylene fiber in a mass ratio of 0.3-0.5:0.5-0.7: 1-3.

The reflective hot melt marking paint also comprises 0.5 to 1.6 weight parts of dioctyl phthalate (DOP).

The reflective hot-melt marking paint also comprises 1.5 to 3 weight parts of bentonite. The particle size of the bentonite is 200-325 meshes. Preferably, the particle size of the bentonite is 325 mesh.

The reflective hot-melt marking paint also comprises 1-2 parts by weight of polyurethane elastomer. The polyurethane elastomer is polyurethane particles, and the particle size of the polyurethane particles is 60-80 meshes. Preferably, the particle size of the polyurethane particles is 80 mesh.

Furthermore, the reflective hot-melt marking paint also comprises 0.3-1 part by weight of dry powder mildew preventive. The dry powder mildew preventive can be selected from commercially available dry powder mildew preventives. Furthermore, the reflective hot melt marking coating also comprises 0.8 to 1.2 weight parts of organic silicon water repellent. The organic silicon water repellent is polymethylhydrosiloxane water repellent. The reflective hot melt marking paint also comprises 0.5 to 6 weight parts of pigment. Typically, the pigment is titanium dioxide.

The preparation method of the reflective hot-melt marking paint comprises the following steps:

1) uniformly mixing carbon five resin and EVA to obtain a resin mixture; uniformly mixing the inner mixed beads with partial white oil to obtain an inner mixed bead mixture, and then uniformly mixing the inner mixed bead mixture with a resin mixture, quartz sand and heavy calcium powder to obtain a premix;

2) uniformly mixing the premix prepared in the step 1) with paraffin and the rest white oil to obtain the product.

The step 1) of uniformly mixing the inner mixed bead mixture with the resin mixture, the quartz sand and the heavy calcium powder is to firstly uniformly mix the inner mixed bead mixture with the resin mixture to obtain a mixed light material, and then uniformly mix the mixed light material with the quartz sand and the heavy calcium powder to obtain a premix.

In the step 1), the carbon five resin and the EVA are uniformly mixed and stirred for 8-12 min. The inner mixed bead mixture and the resin mixture are uniformly mixed and stirred for 1-2 min. Mixing the light material with quartz sand and heavy calcium powder, and stirring for 2-3 min.

The step 2) of uniformly mixing is to stir for 20-30 min. The temperature when the mixture is uniformly mixed in the step 2) is 40-60 ℃.

In the step 1), the polyurethane elastomer is also added when the carbon five resin and the EVA are uniformly mixed. Furthermore, an organic silicon water repellent is added when the carbon five resin and the EVA are uniformly mixed. When the inner mixing bead and part of the white oil are uniformly mixed, the reinforcing fiber is also added.

The bentonite is also added when the mixed light material is uniformly mixed with the quartz sand and the heavy calcium powder. When the mixed light material is mixed with the quartz sand and the heavy calcium powder, the mixed light material is firstly uniformly mixed with the quartz sand, and then the heavy calcium powder is added and uniformly mixed. Furthermore, bentonite is added when heavy calcium powder is added.

And 2) adding DOP when the premix is uniformly mixed with the paraffin and the white oil. Furthermore, when the premix is uniformly mixed with the paraffin and the white oil, the diphenylmethane diisocyanate and the dry powder mildew preventive are also added.

Step 1), drying quartz sand before mixing until the mass fraction of water is not more than 5%; the coarse whiting powder is dried before mixing until the water content is not more than 0.5 percent by mass.

Further preferably, the mass fraction of water in the dried quartz sand is not more than 1%. The quartz sand is dried for 15-20min at 45-60 ℃.

Preferably, the heavy calcium powder is dried until the moisture mass fraction is not more than 0.2%. Further preferably, the heavy calcium powder is dried until the moisture mass fraction is not more than 0.1%. The heavy calcium powder is dried at 40-55 deg.C for 30-40 min.

The inner mixed beads are dried at 40-50 ℃ for 5-10min before mixing. The bentonite is dried at 40-50 deg.C for 15-20min before mixing.

In the step 1), the internal mixing bead and part of the white oil are mixed uniformly, and part of the white oil in the components of the reflective hot-melt marking paint is mixed with the internal mixing bead. Further, the white oil mixed with the inner mixing bead is 0.3 to 0.5 weight part.