生意宝 | 全球化工网 | 韩国化工网 | ChinaChemNet·免费注册 ·用户登录 ·服务中心 
  • 中国化工网首页 >> 化工助手 >> 化学配方数据库



    配方类型: RUBBER, PLASTICS, WAXES
    配方说明: Polyester G
    配方组成: Phthalic Anhydride/22 g
    Diethylene Glycol/584 g
    Adipic Acid/219 g
    Maleic Anhydride/686 g
    Ethylene Glycol/341 g
    配制方法: Charge the glycols. Start the agitator and introduce a slow stream of inert gas. Heat to about 80'C and add the maleic anhydride, followed by the phthalic anhydride and the adipic acid. Raise the temperature to 150'C in 1 hour and then about 10'C per hour until the temperature has reached 210'C. Keep at 210'C until the acid number is less than 60.
    Apply a vacuum of 100 to 200 mm and let the temperature fall to about 180'C. End the vacuum treatment when the acid number is below 40. Cool and add an inhibitor.

    返回数据库查询
    其他库:化学品法规 国家标准 化学品安全数据库(msds) 外贸常识 合同范本 报关指南 商检指南 国际区号 国家代码