Durable road marking paint and preparation method thereof

Abstract

The invention relates to a durable road marking paint and a preparation method thereof, and belongs to the technical field of paints.The durable road marking paint is prepared from a component A and a component B. The mass ratio of the component A to the component B is (4-5): (95-96), the component A is prepared from, by mass, 15-30 parts of polyvinyl chloride, 15-20 parts of styrene-acrylic resin, 5-10 parts of acrylonitrile-butadiene-styrene copolymer and 5-10 parts of polyetherimide; 20 to 30 parts of a silane coupling agent and 15 to 30 parts of polyether modified organic silicon; and the component B comprises 10-15 parts of petroleum resin, 5-10 parts of polytetrafluoroethylene, 5-8 parts of rutile titanium dioxide, 38-42 parts of superfine calcium carbonate powder, 5-10 parts of nano spherical silica powder and 18-20 parts of reflective glass beads. The durability of the road marking paint can be improved, the overall reflective performance of the material can be improved, and the service life of the road marking can be prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and in particular relates to a durable road marking coating and a preparation method thereof. Background Art

[0002] Road markings refer to various lines, arrows, words, patterns, etc. painted on the road to guide traffic, regulate driving order, and ensure traffic safety. They are an important part of traffic facilities, which can provide drivers and pedestrians with good conditional reflection, effectively reduce accidents and improve driving efficiency.

[0003] Road marking paint is a paint used to mark road markings, mainly including thermoplastic paint, two-component paint, solvent-based paint, etc. Although road markings and road marking paints play an important role in traffic management, there are still some problems:

[0004] 1. With aging, the fonts and colors of signs and markings may become blurred, leading to misleading and ambiguous situations.

[0005] 2. Poor reflective effect. When driving at night or in rainy weather, the reflective effect of signs and markings is poor, readability and visibility are greatly reduced, and the risk of traffic accidents is increased.

[0006] 3. Poor durability, prone to problems such as blistering, hollowing, cracking, peeling, falling off, fading, discoloration, and yellowing. Summary of the invention

[0007] The present invention aims to provide a durable road marking paint and a preparation method thereof, which can improve the durability of road markings and simultaneously improve the reflective performance of the markings.

[0008] The technical solution adopted by the present invention to achieve its purpose is as follows:

[0009] A durable road marking paint comprises a component A and a component B in a mass ratio of (4-5):(95-96), wherein, by mass fraction, the component A comprises: 15-30 parts of polyvinyl chloride, 15-20 parts of styrene-acrylic resin, 5-10 parts of acrylonitrile-butadiene-styrene copolymer, 5-10 parts of polyetherimide, 20-30 parts of silane coupling agent, and 15-30 parts of polyether modified organic silicon; the component B comprises 10-15 parts of petroleum resin, 5-10 parts of polytetrafluoroethylene, 5-8 parts of rutile titanium dioxide, 38-42 parts of ultrafine calcium carbonate powder, 5-10 parts of nano-spherical silicon powder, and 18-20 parts of reflective glass microbeads.

[0010] Furthermore, the reflective glass microbeads are pre-treated by surface coating with hyperbranched polyurethane.

[0011] Further, the surface coating pretreatment comprises the following steps:

[0012] S1. After cleaning and drying the reflective glass beads, place them in a low-temperature plasma treatment machine, evacuate to 400-500Pa, introduce oxygen, and treat for 3-5min;

[0013] S2. dilute the hyperbranched polyurethane resin with a solvent, add aluminum powder and mix, then spray it on the surface of the reflective glass microbeads treated in step S1, with a spraying thickness of 10-20 μm, cure, and polish to obtain reflective glass microbeads with a surface coated with hyperbranched polyurethane resin.

[0014] Furthermore, in step S1, the oxygen flow rate is 50-100 sccm.

[0015] Furthermore, in step S2, the solvent is ethanol or acetone, diluted to a solid content of 60-70%, and the amount of aluminum powder added is 2-3% of the hyperbranched polyurethane resin.

[0016] Furthermore, the particle size of the ultrafine calcium carbonate powder is 100-200 mesh; the SiO 2 Content ≥99.6%; the particle size of the reflective glass beads is 50-60μm.

[0017] Furthermore, the silane coupling agent is one or any combination of silane coupling agent KH550, silane coupling agent KH560, silane coupling agent KH570, and silane coupling agent KH792.

[0018] A method for preparing a durable road marking paint comprises the following steps:

[0019] (1) preparing raw materials: according to the mass proportions, prepare 15-30 parts of polyvinyl chloride, 15-20 parts of styrene-acrylic resin, 5-10 parts of acrylonitrile-butadiene-styrene copolymer, 5-10 parts of polyetherimide, 20-30 parts of silane coupling agent, 15-30 parts of polyether modified silicone; 10-15 parts of petroleum resin, 5-10 parts of polytetrafluoroethylene, 5-8 parts of rutile titanium dioxide, 38-42 parts of ultrafine calcium carbonate powder, 5-10 parts of nano-spherical silica powder, and 18-20 parts of reflective glass microbeads;

[0020] (2) preparing component B: pre-treating the surface of reflective glass microbeads by coating with hyperbranched polyurethane, then adding rutile titanium dioxide, ultrafine calcium carbonate powder, and nano-spherical silicon powder and mixing them evenly; mixing petroleum resin and polytetrafluoroethylene evenly, hot-melting them, and evenly adding the mixed powder to obtain component B;

[0021] (3) preparing component A: uniformly mixing polyvinyl chloride, styrene-acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyetherimide, silane coupling agent, and polyether-modified silicone, heating and stirring until the solid components are completely melted, and then shearing, cooling, and grinding to obtain component A;

[0022] (4) Component A and component B are mixed in a mass ratio of (4-5):(95-96), and stirred evenly at 160-180° C. to obtain a product.

[0023] The beneficial effects of the present invention are:

[0024] The road marking paint of the present invention can improve the durability of the paint, and at the same time can also improve the overall light reflecting performance of the material, thereby extending the service life of the road marking.

[0025] The present invention pre-treats the reflective glass micro-beads by coating the surface with a layer of hyperbranched polyurethane and adding aluminum powder, which can improve the bonding and adhesion between the reflective glass micro-beads and the primer, and can also enhance the overall reflective properties of the material. The surface of the micro-beads is treated with plasma technology to improve the chemical properties and physical structure of the micro-bead surface, increase the surface activity, and improve the adhesion of the resin. At the same time, after being treated with a low-temperature plasma machine, the reflectivity of the reflective glass micro-beads can be improved. Polishing the cured reflective glass micro-beads can enhance the smoothness and glossiness of the material surface, thereby ensuring the reflective performance. The hyperbranched polyurethane in the present invention is a hyperbranched polyurethane polymer obtained by grafting a polyurethane prepolymer onto a hyperbranched polymer.

[0026] The styrene-acrylic resin in the hot-melt coating can improve adhesion, enhance weather resistance, provide good mechanical properties, and improve chemical corrosion resistance.

[0027] The polyether-modified organic silicon in the present invention can improve the wettability of the coating to the substrate, prevent surface defects such as shrinkage cavities and edge shrinkage, and also has good heat resistance.

[0028] The polyetherimide in the present invention has excellent heat resistance and chemical corrosion resistance; in addition, the addition of polyetherimide also has good mechanical strength and wear resistance. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should belong to the scope of protection of the present invention.

[0030] Example 1

[0031] A durable road marking paint comprises a component A and a component B in a mass ratio of 5:95, wherein, by mass fraction,

[0032] Component A includes: 23 parts of polyvinyl chloride, 17 parts of styrene-acrylic resin, 7 parts of acrylonitrile-butadiene-styrene copolymer, 8 parts of polyetherimide, 25 parts of silane coupling agent KH560, and 20 parts of polyether modified silicone;

[0033] Component B includes 15 parts of petroleum resin, 6 parts of polytetrafluoroethylene, 6 parts of rutile titanium dioxide, 40 parts of 100-200 mesh ultrafine calcium carbonate powder, 8 parts of nano spherical silicon powder, and 20 parts of 50-60 μm reflective glass microbeads. The reflective glass microbeads need to be pre-treated by surface coating with hyperbranched polyurethane.

[0034] The surface coating pretreatment of reflective glass beads includes the following steps:

[0035] S1. After cleaning and drying the reflective glass beads, place them in a low-temperature plasma treatment machine, evacuate to 400Pa, introduce oxygen at an oxygen flow rate of 80sccm, and treat for 4min;

[0036] S2. Dilute the hyperbranched polyurethane resin with ethanol to a solid content of 65%, add 2% aluminum powder by mass of the hyperbranched polyurethane resin and mix, then spray it on the surface of the reflective glass microbeads treated in step S1, with a spraying thickness of 15 μm, cure, and polish to obtain reflective glass microbeads with a surface coated with hyperbranched polyurethane resin.

[0037] A method for preparing a durable road marking paint comprises the following steps:

[0038] (1) Prepare raw materials: prepare raw materials according to the above proportions;

[0039] (2) preparing component B: pre-treating the surface of reflective glass microbeads by coating with hyperbranched polyurethane, then adding rutile titanium dioxide, ultrafine calcium carbonate powder, and nano-spherical silicon powder and mixing them evenly; mixing petroleum resin and polytetrafluoroethylene evenly, hot-melting them, and evenly adding the mixed powder to obtain component B;

[0040] (3) preparing component A: uniformly mixing polyvinyl chloride, styrene-acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyetherimide, silane coupling agent, and polyether-modified silicone, heating and stirring until the solid components are completely melted, and then shearing, cooling, and grinding to obtain component A;

[0041] (4) Component A and component B were mixed in a mass ratio of 5:95, and stirred evenly at 160° C. to obtain a product.

[0042] Example 2

[0043] A durable road marking paint comprises a component A and a component B in a mass ratio of 5:95, wherein, by mass fraction,

[0044] Component A includes: 15 parts of polyvinyl chloride, 15 parts of styrene-acrylic resin, 5 parts of acrylonitrile-butadiene-styrene copolymer, 5 parts of polyetherimide, 20 parts of silane coupling agent KH560, and 15 parts of polyether modified silicone;

[0045] Component B includes 10 parts of petroleum resin, 5 parts of polytetrafluoroethylene, 5 parts of rutile titanium dioxide, 42 parts of 100-200 mesh ultrafine calcium carbonate powder, 5 parts of nano spherical silicon powder, and 18 parts of 50-60 μm reflective glass microbeads. The reflective glass microbeads need to be pre-treated by surface coating with hyperbranched polyurethane.

[0046] The surface coating pretreatment of reflective glass beads includes the following steps:

[0047] S1. After cleaning and drying the reflective glass beads, place them in a low-temperature plasma treatment machine, evacuate to 500Pa, introduce oxygen, the oxygen flow rate is 100sccm, and treat for 3min;

[0048] S2. Dilute the hyperbranched polyurethane resin with ethanol to a solid content of 60%, add 2% aluminum powder by mass of the hyperbranched polyurethane resin and mix, then spray it on the surface of the reflective glass microbeads treated in step S1, with a spraying thickness of 10 μm, cure, and polish to obtain reflective glass microbeads with a surface coated with hyperbranched polyurethane resin.

[0049] A method for preparing a durable road marking paint comprises the following steps:

[0050] (1) Prepare raw materials: prepare raw materials according to the above proportions;

[0051] (2) preparing component B: pre-treating the surface of reflective glass microbeads by coating with hyperbranched polyurethane, then adding rutile titanium dioxide, ultrafine calcium carbonate powder, and nano-spherical silicon powder and mixing them evenly; mixing petroleum resin and polytetrafluoroethylene evenly, hot-melting them, and evenly adding the mixed powder to obtain component B;

[0052] (3) preparing component A: uniformly mixing polyvinyl chloride, styrene-acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyetherimide, silane coupling agent, and polyether-modified silicone, heating and stirring until the solid components are completely melted, and then shearing, cooling, and grinding to obtain component A;

[0053] (4) Component A and component B were mixed in a mass ratio of 5:95, and stirred evenly at 160° C. to obtain a product.

[0054] Example 3

[0055] A durable road marking paint comprises a component A and a component B in a mass ratio of 4:96, wherein, by mass fraction,

[0056] Component A includes: 30 parts of polyvinyl chloride, 20 parts of styrene-acrylic resin, 10 parts of acrylonitrile-butadiene-styrene copolymer, 10 parts of polyetherimide, 30 parts of silane coupling agent KH560, and 25 parts of polyether modified silicone;

[0057] Component B includes 12 parts of petroleum resin, 8 parts of polytetrafluoroethylene, 8 parts of rutile titanium dioxide, 38 parts of 100-200 mesh ultrafine calcium carbonate powder, 10 parts of nano-spherical silicon powder, and 20 parts of 50-60 μm reflective glass microbeads. The reflective glass microbeads need to be pre-treated by surface coating with hyperbranched polyurethane.

[0058] The surface coating pretreatment of reflective glass beads includes the following steps:

[0059] S1. After cleaning and drying the reflective glass beads, place them in a low-temperature plasma treatment machine, evacuate to 500Pa, introduce oxygen, the oxygen flow rate is 100sccm, and treat for 4min;

[0060] S2. Dilute the hyperbranched polyurethane resin with ethanol to a solid content of 70%, add 2% aluminum powder by mass of the hyperbranched polyurethane resin and mix, then spray it on the surface of the reflective glass microbeads treated in step S1, with a spraying thickness of 20 μm, cure, and polish to obtain reflective glass microbeads with a surface coated with hyperbranched polyurethane resin.

[0061] A method for preparing a durable road marking paint comprises the following steps:

[0062] (1) Prepare raw materials: prepare raw materials according to the above proportions;

[0063] (2) preparing component B: pre-treating the surface of reflective glass microbeads by coating with hyperbranched polyurethane, then adding rutile titanium dioxide, ultrafine calcium carbonate powder, and nano-spherical silicon powder and mixing them evenly; mixing petroleum resin and polytetrafluoroethylene evenly, hot-melting them, and evenly adding the mixed powder to obtain component B;

[0064] (3) preparing component A: uniformly mixing polyvinyl chloride, styrene-acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyetherimide, silane coupling agent, and polyether-modified silicone, heating and stirring until the solid components are completely melted, and then shearing, cooling, and grinding to obtain component A;

[0065] (4) Component A and component B were mixed in a mass ratio of 4:96, and stirred evenly at 160° C. to obtain a product.

[0066] Comparative Example 1

[0067] A durable road marking paint comprises a component A and a component B in a mass ratio of 5:95, wherein, by mass fraction,

[0068] Component A includes: 23 parts of polyvinyl chloride, 17 parts of styrene-acrylic resin, 7 parts of acrylonitrile-butadiene-styrene copolymer, 8 parts of polyetherimide, 25 parts of silane coupling agent KH560, and 20 parts of polyether modified silicone;

[0069] Component B includes 15 parts of petroleum resin, 6 parts of polytetrafluoroethylene, 6 parts of rutile titanium dioxide, 40 parts of 100-200 mesh ultrafine calcium carbonate powder, 8 parts of nano spherical silicon powder, and 20 parts of 50-60 μm reflective glass microbeads.

[0070] A method for preparing a durable road marking paint comprises the following steps:

[0071] (1) Prepare raw materials: prepare raw materials according to the above proportions;

[0072] (2) preparing component B: evenly mixing reflective glass microbeads, rutile titanium dioxide, ultrafine calcium carbonate powder, and nano-spherical silicon powder; evenly mixing petroleum resin and polytetrafluoroethylene, hot-melting them, and evenly adding the mixed powder to obtain component B;

[0073] (3) preparing component A: uniformly mixing polyvinyl chloride, styrene-acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyetherimide, silane coupling agent, and polyether-modified silicone, heating and stirring until the solid components are completely melted, and then shearing, cooling, and grinding to obtain component A;

[0074] (4) Component A and component B were mixed in a mass ratio of 5:95, and stirred evenly at 160° C. to obtain a product.

[0075] Comparative Example 2

[0076] A durable road marking paint comprises a component A and a component B in a mass ratio of 5:95, wherein, by mass fraction,

[0077] Component A includes: 23 parts of polyvinyl chloride, 17 parts of styrene-acrylic resin, 7 parts of acrylonitrile-butadiene-styrene copolymer, 8 parts of polyetherimide, 25 parts of silane coupling agent KH560, and 20 parts of polyether modified silicone;

[0078] Component B includes 21 parts of petroleum resin, 6 parts of rutile titanium dioxide, 48 parts of 100-200 mesh ultrafine calcium carbonate powder, and 20 parts of 50-60 μm reflective glass microbeads. The reflective glass microbeads need to be pre-treated by surface coating with hyperbranched polyurethane.

[0079] The surface coating pretreatment of reflective glass beads includes the following steps:

[0080] S1. After cleaning and drying the reflective glass beads, place them in a low-temperature plasma treatment machine, evacuate to 400Pa, introduce oxygen at an oxygen flow rate of 80sccm, and treat for 4min;

[0081] S2. Dilute the hyperbranched polyurethane resin with ethanol to a solid content of 65%, add 2% aluminum powder by mass of the hyperbranched polyurethane resin and mix, then spray it on the surface of the reflective glass microbeads treated in step S1, with a spraying thickness of 15 μm, cure, and polish to obtain reflective glass microbeads with a surface coated with hyperbranched polyurethane resin.

[0082] A method for preparing a durable road marking paint comprises the following steps:

[0083] (1) Prepare raw materials: prepare raw materials according to the above proportions;

[0084] (2) preparing component B: pre-treating the surface of reflective glass microbeads by coating with hyperbranched polyurethane, then adding rutile titanium dioxide and ultrafine calcium carbonate powder and mixing them evenly; hot-melting petroleum resin and evenly adding the mixed powder to obtain component B;

[0085] (3) preparing component A: uniformly mixing polyvinyl chloride, styrene-acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyetherimide, silane coupling agent, and polyether-modified silicone, heating and stirring until the solid components are completely melted, and then shearing, cooling, and grinding to obtain component A;

[0086] (4) Component A and component B were mixed in a mass ratio of 5:95, and stirred evenly at 160° C. to obtain a product.

[0087] The above-obtained product was tested for retroreflectivity and durability. The results are shown in Table 1.

[0088] Table 1

[0089] deal with <![CDATA[Retroreflective coefficient (mcd·1x -1 ·m -2 )]]> Wear amount / mg Durability / d Example 1 332.5 50.1 1258 Example 2 315.8 50.8 1248 Example 3 324.6 49.6 1264 Comparative Example 1 273.7 58.7 1089 Comparative Example 2 310.4 57.2 1126

[0090] In the present invention, the surface coating treatment of the reflective glass microbeads can improve the adhesion of the reflective glass microbeads, reduce the shedding rate thereof, thereby extending the service life, and at the same time improve the reflectivity of the marking line.

[0091] The addition of polytetrafluoroethylene in the present invention can improve the reflection of light and heat radiation and reduce the absorption of light and heat radiation by the coating, thereby reducing the aging problem caused by solar radiation, thereby improving durability. The addition of spherical silica powder, with its special spherical structure, can increase the heat insulation of the coating and play a shielding role, thereby reducing the thermal aging problem caused by heat, thereby improving durability.

Claims

1. A durable road marking paint, characterized in that: The invention comprises component A and component B in a mass ratio of (4-5):(95-96), wherein, by mass fraction, component A comprises: 15-30 parts of polyvinyl chloride, 15-20 parts of styrene-acrylic resin, 5-10 parts of acrylonitrile-butadiene-styrene copolymer, 5-10 parts of polyetherimide, 20-30 parts of silane coupling agent, and 15-30 parts of polyether modified silicone; component B comprises 10-15 parts of petroleum resin, 5-10 parts of polytetrafluoroethylene, 5-8 parts of rutile titanium dioxide, 38-42 parts of ultrafine calcium carbonate powder, 5-10 parts of nano-spherical silicon powder, and 18-20 parts of reflective glass microbeads.

2. A durable road marking paint according to claim 1, characterized in that: The reflective glass microbeads are pre-treated by surface coating with hyperbranched polyurethane.

3. A durable road marking paint according to claim 2, characterized in that: Surface coating pretreatment includes the following steps: S1. After cleaning and drying the reflective glass beads, place them in a low-temperature plasma treatment machine, evacuate to 400-500Pa, introduce oxygen, and treat for 3-5min; S2. dilute the hyperbranched polyurethane resin with a solvent, add aluminum powder and mix, then spray it on the surface of the reflective glass microbeads treated in step S1, with a spraying thickness of 10-20 μm, cure, and polish to obtain reflective glass microbeads with a surface coated with hyperbranched polyurethane resin.

4. A durable road marking paint according to claim 3, characterized in that: In step S1, the oxygen flow rate is 50-100 sccm.

5. A durable road marking paint according to claim 3, characterized in that: In step S2, the solvent is ethanol or acetone, which is diluted to a solid content of 60-70%, and the amount of aluminum powder added is 2-3% of the hyperbranched polyurethane resin.

6. A durable road marking paint according to claim 1, characterized in that: The particle size of the ultrafine calcium carbonate powder is 100-200 meshes; the SiO2 content in the nano-spherical silicon powder is ≥99.6%; and the particle size of the reflective glass microbeads is 50-60 μm.

7. A durable road marking paint according to claim 1, characterized in that: The silane coupling agent is one of silane coupling agent KH550, silane coupling agent KH560, silane coupling agent KH570, and silane coupling agent KH792, or any combination thereof.

8. A method for preparing a durable road marking paint, characterized in that: The following steps are involved: (1) preparing raw materials: according to the mass proportions, prepare 15-30 parts of polyvinyl chloride, 15-20 parts of styrene-acrylic resin, 5-10 parts of acrylonitrile-butadiene-styrene copolymer, 5-10 parts of polyetherimide, 20-30 parts of silane coupling agent, 15-30 parts of polyether modified silicone; 10-15 parts of petroleum resin, 5-10 parts of polytetrafluoroethylene, 5-8 parts of rutile titanium dioxide, 38-42 parts of ultrafine calcium carbonate powder, 5-10 parts of nano-spherical silica powder, and 18-20 parts of reflective glass microbeads; (2) preparing component B: pre-treating the surface of reflective glass microbeads by coating with hyperbranched polyurethane, then adding rutile titanium dioxide, ultrafine calcium carbonate powder, and nano-spherical silicon powder and mixing them evenly; mixing petroleum resin and polytetrafluoroethylene evenly, hot-melting them, and evenly adding the mixed powder to obtain component B; (3) preparing component A: uniformly mixing polyvinyl chloride, styrene-acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyetherimide, silane coupling agent, and polyether-modified silicone, heating and stirring until the solid components are completely melted, and then shearing, cooling, and grinding to obtain component A; (4) Component A and component B are mixed in a mass ratio of (4-5):(95-96), and stirred evenly at 160-180° C. to obtain a product.