In order to produce light-color hydrocarbon resin with high softening point, we can achieve this purpose though a two-stage process. During the process, hydrocarbon fraction are polymerized with the catalytic action of aluminum chloride. Generally, it is considered as a two-stage reaction system.

In order to retain the quality of the crude resin which has a higher softening point, the temperature in the first stage is lower than the temperature in the second stage. Due to the high temperature, the chlorides will be removed from the resin. And in proper temperature and pressure, the color will be decreased as well.

Many types of resins are made by this process and it will be easier to understand if we take the producing process of DAC-B resin as an example. The chloride as a catalyst is mixed with the resin at the temperature which is in the range of 50℃ to 100℃. When the temperature is rising, the resins are separated with the chloride and attain higher softening point.

The hydrocarbon resin produced by this way is much more stable and more useful in many industries. For example, it has an outstanding performance in adhesive industries. Shanghai Qilong Chemical Co., Ltd. has engaged in manufacturing all types of hydrocarbon resin for years and welcome to visit our website to find more information: http://www.shqilongchem.com/