2021-04-18 Pageview：2067
Traffic markings are mainly set on the road surface, subject to sun, rain, wind, snow and freezing, and impact and abrasion of vehicles, so there are strict requirements on its performance. Thermoplastic road marking paint have been widely used in traffic engineering.
1, The composition of thermoplastic road-marking paints
| Extender pigments and fillers | 47%—66% |
| Synthetic resin | 15%-20% |
| Glass beads | 18%-23% |
| Coloring pigment | 2%-10% |
| Plasticizer and other additives | 2%-5% |
2. Requirements for thermoplastic resin
The most important component in thermoplastic paint is thermoplastic resin, which is characterized by its cohesiveness and quick-drying, which is exactly what road marking coatings require. Synthetic resins can combine coloring pigments, extender pigments, reflective materials, etc., adhere to the road surface, heat-melt and bond, make the coating have a suitable viscosity when melted, and dry to form a film after cooling.
Maleic anhydride modified C5 petroleum resin is the main resin of hot-melt marking paint, which has the advantages of high softening point, good adhesion, and low price.
3. Modification of marking paint resin by PE wax
Polyethylene wax is an important additive for hot-melt marking paint. Its main function is to reduce the viscosity of the resin, improve the fluidity, and increase the wear resistance and stain resistance of the coating film. High-quality polyethylene wax will also improve the quick-drying of the coating and make the filler difficult to settle.
In this article, polyethylene waxes with different indicators are mixed with resin/DOP in common ratios, and their softening point and viscosity are measured to evaluate the modification effect of polyethylene wax on petroleum resin.
Wax Index
| Melting point | Viscosity @140℃ | Volatile | |
| TS-5110 | 110 | <25 | 1.50% |
| Imported FT wax 1 | 115 | <20 | <1% |
| Imported FT wax 2 | 112 | <20 | <1% |
| Imported PE wax | 116 | <20 | >10% |
| Domestic PE wax | 110 | <60 | >15% |
Mix petroleum resin, DOP, and wax in a ratio of 14:1.5:1 to test the softening point
Test Result
| Softening Point | |
| TS-5110 | 107 |
| Imported FT wax 1 | 109 |
| Imported FT wax 2 | 104 |
| Imported PE wax | 100 |
| Domestic PE wax | 102 |
It can be seen from the above that TS-5110 is a polyethylene wax with a concentrated molecular weight distribution that has been finely cut and processed. It can significantly improve the softening point of the petroleum resin for road marking paint. It is better than general polyethylene wax and reaches imported Fischer-Tropsch wax. It is used for hot-melt marking paint with excellent effect.
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