• 专利标题:   Preparing polyurethane, involves preparing polyol using e.g. polyether, polytetrahydrofuran ether, polyethylene glycol, compatibilizer polybranched polyester and foaming agent, then preparing isocyanate using diphenylmethane diisocyanate, and mixing polyol and isocyanate in mixing reaction kettle.
  • 专利号:   CN114621410-A
  • 发明人:   ZHAO W, LIANG Y, YAO H, YANG Z, LIU J, SHI J
  • 专利权人:   UNIV ZHEJIANG SCI TECHNOLOGY
  • 国际专利分类:   B01J019/00, B01J019/18, B01J004/02, C08G018/08, C08G018/42, C08G018/48, C08G018/76, C08K005/5313
  • 专利详细信息:   CN114621410-A 14 Jun 2022 C08G-018/48 202272 Chinese
  • 申请详细信息:   CN114621410-A CN10287697 22 Mar 2022
  • 优先权号:   CN10287697

▎ 摘  要

NOVELTY - Preparing polyurethane, comprises (1) preparing polyether and polytetrahydrofuran ether as main body, adding polyethylene glycol (PEG) and polypropylene glycol (PPG) and blending with polyether and polytetrahydrofuran ether, and then adding compatibilizer polybranched polyester to modify polyether and polytetrahydrofuran ether, (2) adding soybean oil and 1,2,4-triazine-2-methyl-6-hydroxy-3-thio-5-one sequentially to the mixture obtained in step (1), and then adding foaming agent to obtain polyol, (3) preparing isocyanate using diphenylmethane diisocyanate, and (4) adding polyol prepared in step (2) into mixing reaction kettle, then adding isocyanate prepared in step (3), and mixing to obtain modified polyurethane. USE - The method is useful for preparing polyurethane. ADVANTAGE - The method has mild reaction conditions, and easily controllable reaction process.