阅读说明：本技术 一种道路划线涂料及其制备方法 (Road marking paint and preparation method thereof ) 是由 朱晨润 张丽 卢志峰 张�杰 乔来红 于 2019-11-04 设计创作，主要内容包括：一种易于去除、更改的道路划线涂料,该涂料的制备方法包括如下步骤：(1)在需要划线的道路表面区域进行划线预处理,按照预设的形状在道路表面形成网状凹槽,然后将道路表面清理干净；(2)将具有预设形状的金属丝网铺设在所述网状凹槽中,其中金属丝的直径为网状凹槽的宽度的5-20%；(3)在道路表面涂覆第一透明涂料组合物层,然后湿碰湿涂覆第二水基着色涂料组合物层,同时固化第一透明涂料组合物层和第二水基着色涂料组合物层。由于金属丝网对涂料的粘附作用,有利于道路表面的涂料的完全剥离,使得透明涂料层仅有微量、甚至完全不残留在道路表面,确保了道路表面更改后的标识准确、清晰、安全有效。(An easily removable and modifiable road marking paint, the preparation method of which comprises the following steps: (1) carrying out scribing pretreatment on the surface area of the road needing scribing, forming a reticular groove on the surface of the road according to a preset shape, and then cleaning the surface of the road; (2) laying a wire mesh with a preset shape in the mesh groove, wherein the diameter of the wire is 5-20% of the width of the mesh groove; (3) the method includes applying a first layer of a clear coating composition to the surface of the roadway, then applying a second layer of a water-based pigmented coating composition wet-on-wet, and simultaneously curing the first layer of the clear coating composition and the second layer of the water-based pigmented coating composition. Because the wire mesh is adhered to the coating, the coating on the surface of the road can be completely stripped, so that the transparent coating layer is only in trace amount or even completely not remained on the surface of the road, and the mark of the road after being changed is accurate, clear, safe and effective.)

1. The preparation method of the road marking paint is characterized by comprising the following steps:

(1) carrying out scribing pretreatment on the surface area of the road needing scribing, forming a reticular groove on the surface of the road according to a preset shape, and then cleaning the surface of the road;

(2) laying a wire mesh with a preset shape in the mesh groove, wherein the diameter of the wire is 5-20% of the width of the mesh groove;

(3) the method includes applying a first layer of a clear coating composition to the surface of the roadway, then applying a second layer of a water-based pigmented coating composition wet-on-wet, and simultaneously curing the first layer of the clear coating composition and the second layer of the water-based pigmented coating composition.

2. A road marking paint as claimed in claim 1, wherein: the first clear coating composition includes a water-based polyolefin resin a and a curing agent B.

3. A road marking paint as claimed in claim 1, wherein: the second water-based colored coating composition comprises a water-based polyolefin resin A, a curing agent B, a pigment C, a leveling agent D, a thickening agent E and a dispersing agent F.

4. A road marking paint as claimed in claim 2 or 3, wherein: the water-based polyolefin resin A is selected from one or more of polyethylene resin, polypropylene resin, polybutylene resin, ethylene-propylene copolymer, propylene-butylene copolymer and ethylene-propylene-butylene copolymer.

5. A road marking paint as claimed in claim 2 or 3, wherein: the average molecular weight of the water-based polyolefin resin A was 50000-250000.

6. A road marking paint as claimed in claim 2 or 3, wherein: the curing agent B is amino resin, and is specifically selected from melamine resin, urea resin or guanamine resin.

7. A road marking paint as claimed in claim 2 or 3, wherein: the mass ratio of the curing agent B to the water-based polyolefin resin A is 2-10%.

8. A road marking paint as claimed in claim 3, wherein: the pigment C is selected from white pigment or yellow pigment, the white pigment is titanium dioxide, and the yellow pigment is chrome yellow or yellow iron oxide.

9. A method of removing and modifying a road marking paint as claimed in any one of claims 1 to 8, characterized in that: the road marking paint is directly removed by a mechanical removal method.

Technical Field

The invention relates to the field of coatings, in particular to a road marking coating and a preparation method thereof.

Background

The road marking paint is a paint which is coated on the surface of a road and is used for marking the route and the direction of the road, is a safety mark and is one of important components of traffic facilities. The road marking paint mainly comprises three types of normal-temperature solvent type paint, water-based road marking paint and hot-melt type paint.

Usually, the road sign needs to be clear and accurate, so that the user can use the road sign safely. Along with the development of cities, road planning in the cities can be changed to a certain extent, so that the original road marking paint needs to be changed. The existing modification method of the road marking paint is usually mechanical removal, but the removal method is not thorough, so that the original road mark is still clearly visible on the road surface. With the application of new road marking paint, two different road markings may be present on the same area of the road surface, which may be annoying. Particularly, for a driver, in the driving process, the speed is relatively high, the driver needs to make quick and accurate judgment and reaction on the road mark, when the driver faces two different road marks in the same area, the driver is often difficult to make quick and accurate judgment and reaction, potential hidden dangers are generated on road safety, and even serious traffic accidents are caused.

Therefore, there is a need to develop a road marking paint which is easy to remove and modify, and at the same time, before modification, the road marking paint should maintain the original clear and stable marking effect.

Disclosure of Invention

Aiming at the defects in the technology, the invention provides the road marking paint which is easy to remove and change, and the preparation method of the paint comprises the following steps:

(1) carrying out scribing pretreatment on the surface area of the road needing scribing, forming a reticular groove on the surface of the road according to a preset shape, and then cleaning the surface of the road;

(2) laying a wire mesh with a preset shape in the mesh groove, wherein the diameter of the wire is 5-20% of the width of the mesh groove;

(3) the method includes applying a first layer of a clear coating composition to the surface of the roadway, then applying a second layer of a water-based pigmented coating composition wet-on-wet, and simultaneously curing the first layer of the clear coating composition and the second layer of the water-based pigmented coating composition.

The first transparent coating composition layer has an adhesion effect, so that the adhesion stability of the second water-based coloring coating composition layer and the road surface can be improved, and meanwhile, when the road marking coating needs to be changed, the first transparent coating composition is mechanically removed, so that only less transparent coating is left on the road surface, and the clearness and the accuracy of the changed road marking coating cannot be influenced. Particularly, the wire mesh is laid in the mesh groove in advance, and the medium coating is easily crosslinked on the wire mesh in the curing process. In the coating removal process, the wire mesh is beneficial to adhering and completely stripping the coating on the road surface, so that the transparent coating layer is only slightly or even completely not remained on the road surface.

Wherein the first clear coating composition comprises a water-based polyolefin resin A and a curing agent B.

Wherein the second water-based coloring coating composition comprises a water-based polyolefin resin A, a curing agent B, a pigment C, a leveling agent D, a thickening agent E and a dispersing agent F.

Wherein the water-based polyolefin resin A is selected from one or more of polyethylene resin, polypropylene resin, polybutylene resin, ethylene-propylene copolymer, propylene-butylene copolymer and ethylene-propylene-butylene copolymer.

Wherein the water-based polyolefin resin A has an average molecular weight of 50000-250000.

Wherein, the curing agent B is amino resin, and is specifically selected from melamine resin, urea resin or guanamine resin.

Wherein the mass ratio of the curing agent B to the water-based polyolefin resin A is 2-10%.

Wherein, the pigment C is selected from white pigment or yellow pigment. The white pigment is titanium dioxide, and the yellow pigment is chrome yellow or yellow iron oxide.

Another aspect of the present invention includes the removal and modification of the above-described road-marking paint, which can be directly removed by a mechanical removal method due to the pre-laid wire mesh. The adhesion effect of the wire mesh to the coating is favorable for completely stripping the coating on the road surface, so that the transparent coating layer is only in trace amount or even completely not remained on the road surface, and the accurate, clear, safe and effective identification after the road surface is changed is ensured.

According to the invention, the marking pretreatment is carried out on the road surface in advance, and the reticular grooves are formed on the road surface according to the preset shape, so that the adhesion between the road marking paint and the road surface is increased, and the stability and the strength of the road marking paint are ensured. In addition, the first clear coating composition layer and the second water-based colored coating composition layer both use a water-based polyolefin resin as a main agent, ensuring adhesion stability between the two layers, and similarly using a curing agent. This ensures that the coating can be applied in a wet-on-wet process and then co-cured, saving time.

Detailed Description

The present invention will be described in detail with reference to specific examples. Of course, the described embodiments are merely inventive in part, and not in whole. Other examples, which would be obtained by one of ordinary skill in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.