High mechanical properties. Petroleum resin has strong cohesion and dense molecular structure,Petroleum Resin so its mechanical properties are higher than general-purpose thermosetting resins such as phenolic resin and unsaturated polyester. Excellent bonding performance. The extremely active petroleum-based,Petroleum Resin warp-based, ether group,Petroleum Resin amine bond, vinegar bond and other polar groups in the petroleum resin curing system give the petroleum cured product an extremely high bonding strength. Coupled with its high cohesive strength and other mechanical properties,Petroleum Resin it has particularly strong adhesive properties and can be used as a structural adhesive.
The curing shrinkage is small. Generally 1%--2%. It is one of the varieties with the smallest curing shrinkage rate among thermosetting resins. The coefficient of linear expansion is also very small,Petroleum Resin so the size of the product is stable,Petroleum Resin the internal stress is small, and it is not easy to crack.
Craftsmanship is good. Petroleum resins basically do not produce low molecular volatiles when cured,Petroleum Resin so they can be molded under low pressure or contact pressure. The flexibility of formula design is great,Petroleum Resin and a formula suitable for various technological requirements can be designed.
Good electrical performance. It is one of the best dielectric properties among thermosetting resins. Good stability. Petroleum resins that do not contain impurities such as alkalis and salts are not easily deteriorated. As long as it is stored properly (sealed, protected from moisture,Petroleum Resin not exposed to high temperatures),Petroleum Resin its storage period is 1 year. It can still be used if the inspection passes after the expiration date. Solidified petroleum products have excellent chemical stability. The corrosion resistance of alkali, acid,Petroleum Resin salt and other media is better than that of unsaturated polyester resin, phenolic resin and other thermosetting resins.
The heat resistance of the petroleum solidified product is generally 80 to 100 ℃. The heat-resistant varieties of petroleum resin can reach 200 ℃ or higher. Among thermosetting resins, petroleum resin and its cured products have the best comprehensive performance.
