摘要
聚醚型聚氨酯(PEU)用于化妆品中,由聚四亚甲基醚二醇(PTMG)和聚环氧乙烷(PEO)与4,4-二苯甲烷二异氰酸酯(MDl)采用一步法合成,结果表明PEU暴露在60℃酒精/水(80/20,体积比)溶液中放置4周后发生降解,PEU发生变质,其相对分子质量、粘度和机械性能都发生改变。在氮气环境中加入抗氧剂维它命E可抑制降解,并产生协同效应,维它命E是PEU在化妆品应用中一种很有效的抗氧剂。
The polyetherurethane （PEU） was synthesized by one-step method for cosmetic applications by coupling poly （tetramethylene oxide） （PTMG,Mn=2000） and poly （ethylene oxide） （PEO, Mn=2000） with 4,4＇-diphenylmethane diisocyanate （MDI）. PEU was susceptible to degradation when it was exposed to an ethanol-water （80/20 v/v%） mixed solvent and stored at 60℃ for 4 weeks. These conditions resulted in deterioration of PEU molecular weight （Mn）, viscosity,and mechanical properties. In order to inhibit the degradation of PEU dissolved in an ethanol-water （80/20 v/v%） mixed solvent at 60℃,applying a nitrogen environment and adding an antioxidant-Vitamin E was efficient. The results showed that it could also produce a synergistic effect. Therefore Vitamin E was an effective antioxidant for cosmetic polyurethanes.
出处
《特种橡胶制品》
2007年第6期43-46,共4页
Special Purpose Rubber Products
