The application of petroleum resin in road marking paints Road marking paints can be divided into pavement marking paints and signage paints according to usage; according to construction requirements, they can be divided into solvent-based paints and hot-melt paints. Hot-melt paint has the characteristics of fast drying, no pollution during construction, wear resistance, long service life of pressure resistance, and the ability to spread glass beads on the surface to increase the visibility and so on. Hot-melt road marking paints in developed countries such as Japan and the United States have accounted for more than 90% of total road marking paints. The hot-melt road marking paint requires that the resin used in the paint should not fall off for 1-1.5 years under the conditions of sunlight, rain, and rolling, so the resin must have excellent weather resistance, wear resistance and high compressive strength. The resins used as hot-melt road marking paints are mainly rosin resins and petroleum resins. Petroleum resins are often used abroad. In recent years, more hydrogenated petroleum resins have been used to enhance weather resistance. The white hot-melt road marking paint is mainly based on c5 resin, and the yellow is mainly based on c5&c9 copolymerization.
Our country has also applied for the successful development of the formulation and construction technology of hot-melt road marking paint with maleic anhydride modified petroleum resin to improve the softening point and make it the main resin for road marking paint.
Application in general varnishes and blended paints Petroleum resins have good solubility in solvents and can be miscible with most resins. The resulting paint dries quickly, has good brushability and leveling, and has improved coatings Shine. Therefore, petroleum resin is often used to formulate varnishes and blend other paints. Japan used 15,000 tons of petroleum resin in various varnishes in 1995, mainly c9 petroleum resin.
The coating industry in my country uses c9 petroleum resin to formulate varnishes more widely. Some use petroleum resin instead of hard resin, Zhongshan c9 petroleum resin, add appropriate amount of thermal stabilizing agent, and appropriately reduce the thermal refining temperature, developed into three light-colored, dark and black blending paint formulations. Some use petroleum resins to replace expensive tung oil and other vegetable oils, and they are formulated with phenolic resins to make high-solids phenolic blend paints with 75% solids; some use the characteristics of petroleum resins that are easily soluble in hydrocarbon solvents. It forms a resin base material with low viscosity, which is miscible with other resins to produce various water-resistant, acid-alkali-resistant, color- and gloss-retaining coatings; some of them are made of 50%-70% olefin-containing fractions, c9 Petroleum resin manufacturers use liquid compound aluminum trichloride dication complex as a catalyst for polymerization reaction, and use --- elution catalyst, vacuum distillation to remove the agent to obtain high iodine value petroleum resin coating.