发明授权
- 专利标题: Method of producing a hydrophilic resin
- 专利标题(中): 亲水性树脂的制造方法
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申请号: US09634532申请日: 2000-08-08
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公开(公告)号: US06476155B1公开(公告)日: 2002-11-05
- 发明人: Katsuyuki Wada , Masatoshi Nakamura , Kinya Nagasuna , Yoshihiko Masuda
- 申请人: Katsuyuki Wada , Masatoshi Nakamura , Kinya Nagasuna , Yoshihiko Masuda
- 优先权: JP8-17894 19960202; JP8-25552 19960213
- 主分类号: F83
- IPC分类号: F83
摘要:
A hydrophilic polymer is denatured with a gaseous denaturant or a powdery denaturant substance made from a liquid denaturant substance. The liquid denaturant substance is made into powders by, for example, a method of mixing the liquid denaturant substance with a water-insoluble compound, a method of cooling the liquid denaturant substance to or below its melting point to turn the same into a solid state. Consequently, the hydrophilic polymer can be denatured uniformly. In case that the hydrophilic polymer is denatured with a gaseous denaturant, the hydrophilic polymer and denaturant react with each other efficiently in a safe manner regardless of the size or shape of the hydrophilic polymer. In case that the hydrophilic polymer is denatured with the powdery denaturant substance, not only the liquid denaturant substance which is substantially in the solid state can be mixed with the hydrophilic polymer, but also the denaturation timing can be readily controlled.