Evaluation And Application Verification Of Bio Based Hot Melt Marking Coatings

As an important traffic safety facility,road marking paint plays an important role in ensuring traffic safety.The most widely used and applied hot-melt road marking paint in China is the hot-melt road marking paint.It has the advantages of fast drying,good abrasion resistance,and strong adhesion,but it also has insufficient life span.Traffic,environment and other issues.Adding bio-based polymer materials on the basis of traditional marking coatings can improve the adhesion and abrasion resistance of the coatings.Therefore,this thesis intends to design a variety of bio-based hot-melt marking coatings,which are optimized through the comparative evaluation of indoor performance tests,and then verified by engineering applications to achieve the purpose of developing new bio-based coatings to replace traditional coatings and prolong the service life.The hot-melt marking paint studied in this thesis is improved on the basis of raw materials,and bio-based resin is initially selected as the main film-forming substance to enhance the adhesion between the paint and the road surface.The active titanium dioxide is selected as the main pigment in the pigment to provide good hiding power for the coating.Select light calcium carbonate as the main filler,and replace part of active barium sulfate and zinc oxide with part of calcium carbonate to achieve the purpose of improving performance and reducing costs.Incorporating a small amount of functional additives mainly improves the appearance of the coating,and enhances the flexibility,plasticity and aging resistance of the coating.The reflective material is preferably made of glass beads with high circularity and strong refractive index,which are used to enhance the visibility of the marking and ensure that the driver can drive quickly and safely.Four bio-based hot-melt marking paint samples were obtained by process preparation of the designed new formula.The bio-based hot-melt marking paints were tested in the laboratory,and compared with traditional hot-melt marking paints for analysis and evaluation.For the quantitative analysis test,the corresponding conclusion can be drawn through data analysis.For the qualitative analysis test,the corresponding conclusion can be drawn by observing the appearance of the coating film according to the requirements of the specification.For individual tests,it is necessary to change the standard test conditions to distinguish the quality of the coating performance.The indoor test mainly conducts density test,softening point test,viscosity test,water resistance and alkali resistance,heating stability,low temperature crack resistance,compressive strength,non-stick tire drying time,abrasion resistance test,and comprehensive analysis of several coatings.Use performance.The field test mainly tests the retroreflective brightness coefficient and friction coefficient,which are used to study the reflective performance and anti-skid performance of the marking paint respectively.Through the research of indoor test and field test,a bio-based hot-melt marking paint with better performance has been preliminarily determined.Next,the hot-melt marking paint will be used for engineering application verification,and the process flow will be studied by proposing the construction process of the paint.Carry out the cause analysis for the common problems of marking paint,and propose corresponding solutions.The preferred bio-based hot-melt marking paint was applied to the Jinan section of Beijing-Taiwan Expressway.Through follow-up observation,it was found that the new bio-based marking paint has good road performance,which is in line with the future development trend of marking paint and has good applications prospect.