(1) high mechanical properties.
Petroleum resin has strong cohesion and dense molecular structure, so its mechanical properties are higher than phenolic resin and unsaturated polyvinegar general thermosetting resin.
(2) excellent bonding performance.
The petroleum base, transbase, ether bond, amine bond, vinegar bond and other polar groups with great activity in the curing system of petroleum resin give the petroleum curing substance a very high bonding strength.
In addition, it has high cohesion strength and other mechanical properties, so it is particularly strong adhesion, can be used as a structural adhesive.
(3) low curing shrinkage.
Usually 1 to 2 percent.
It is one of the varieties with the smallest curing shrinkage in thermosetting resin.
Line expansion coefficient is also very small, so its product size is stable, internal stress is small, not easy to crack.
(4) good workmanship.
Petroleum resin curing basically does not produce low molecular volatiles, so can be low pressure molding or contact molding.
The flexibility of formula design is very great, which can be designed to meet the requirements of various processes.
(5) good electrical performance.
Thermosetting resin is one of the best intermediate electrical properties of the varieties.
(6) good stability.
The petroleum resin without alkali, salt and other impurities is not easy to deteriorate.
As long as it is properly stored (sealed, free from moisture and high temperature), the storage period is 1 year.
It can still be used after the expiration if the inspection is qualified.
Petroleum curable has excellent chemical stability.
Its corrosion resistance of alkali, acid, salt and other media is better than that of unsaturated poly - vinegar resin, phenolic resin and other thermosetting resin.
(7) the heat resistance of petroleum curing products is generally 80 - l00℃.
The heat resistant varieties of petroleum resin can reach 200℃ or higher.
(8) among thermosetting resins, petroleum resins and their curing materials have the best comprehensive performance.