... production process, at a certain temperature and pressure conditions, generated by the polymerization and the molecular weight range 300-3000 ... strength, acid resistance, alkali resistance and water resistance, and can effectively reduce production costs. D, The ink industry: petroleum resin, ... 9080~9090~100100~110110~120120~130130~140ColorASTM D-1544#7 ~12Acid ValueASTM D-974mgKOH/g 0.3~0.5Bromine ...