PREPARATION METHOD OF EXTRACT, DO NOT CAUSING ALLERGY FROM BARK, DRIED LACQUER AND HEARTWOOD OF RHUS VERNICIFLUA AND COMPOSITION CONTAINING THE SAME

摘要

A method for preparing a Rhus verniciflua derived extract is provided to obtain the extract, which does not causing allergy and shows anti-cancer, pain alleviating and cancer preventing effects, by treating the extract with an alkaline water. A method for preparing a Rhus verniciflua derived extract comprises the steps of: (a) mixing Rhus verniciflua, Rhus verniciflua barks and Lacca Sinica Exsiccata in a weight ratio of 1:0.05-0.3:0.05-0.2 and pulverizing the mixture; (b) after adding water 5-20 times of the weight of the powder obtained from the step(a) to the powder, extracting and filtering it to obtain a water extract; (c) after adding ethanol 5-10 times of the weight of the remnant after the step(b) to the remnant, extracting it to obtain an ethanol extract; (d) concentrating the extracts obtained from the steps(b) and (c) to have a solid content concentration of 20-50 weight/volume%; and (e) after adding an alkaline water having a pH of 8.0-9.5 to the concentrate obtained from the step(d) to have a solid content concentration of 5-40 weight/volume%, adding gas containing oxygen thereto with mixing. A Rhus verniciflua derived extract obtained by the method comprises 5-26 wt.% of fustin, 1-10 wt.% of fisetin, 0.1-10 wt.% of 3,4-dihydroxybenzoic acid and 15-55 wt.% of polyphenol and does not include urushiol, butein, and butin. A composition for alleviating pain alleviating, anti-cancer or preventing cancer comprises the extract as an effective ingredient.