Xing Ya-cheng
2007
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Journal
Journal of Qingdao University
Abstract
The polymeric hindered phenolic antioxidant was synthesized by dicyclopentadiene-p-methylphenol resin and isobutylene.The reaction conditions such as catalyst,temperature and the reaction time were studied.The new purification process was provided.The H2SO4 was the best catalyst for the reaction,its dosage was 1.5% of the weight of the resin.The dosage of sobutylene was 0.5 mol/100 g resin.The reaction temperature was about 70 ℃~90 ℃.The better reaction time was 4 hours.The toluene used as solvent was separated by azeotrope process with water.The white solid was gaind,its softening point was about 129 ℃.The molecular weight was above 800.