Abstract ：In this paper, modified products of castor oil which can dissolve in water was prepared through castor oil partially esterified by maleic anhydride, sulfited by sodium sulfite. The thesis has been investigated especially in esterification temperature, the mole ratio of castor oil and malaysian and its effect on esterification and sulfiting. The result of mixture’s content of the malaysian acid anhydride、hydroxyl value、iodine value confirmed that the production which attained at 110℃, the mole ratio of malaysian acid anhydride and castor oil is 1.1:1, the mole ratio of maleic anhydride and sodium sulfite is 1.67:1 has the best properties. The thesis also discussed the leather stuffing properties compared with domestic and international.
Keywords：malaysian acid anhydride; castor oil ;sodium sulfite; modified.
