发明授权
- 专利标题： Method for recovering cooling characteristics of water-soluble quenching medium, and water-soluble quenching medium with recovered cooling characteristics
- 专利标题（中）： 用于回收水溶性淬火介质的冷却特性的方法和具有回收冷却特性的水溶性淬火介质
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申请号： US794934申请日： 1997-02-04
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公开(公告)号： US5908886A公开(公告)日： 1999-06-01
- 发明人: Hitoshi Uchida , Eiichi Nakamura
- 申请人： Hitoshi Uchida , Eiichi Nakamura
- 申请人地址： JPX Tokyo
- 专利权人： Idemitsu Kosan Co., Ltd.
- 当前专利权人： Idemitsu Kosan Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-027938 19960215
- 主分类号： C08L101/00
- IPC分类号： C08L101/00 ; C21D1/60 ; C08K5/06
摘要：
Disclosed are a method for restoring a water-soluble quenching medium being used, of which the cooling characteristics have been deteriorated during use, to its original condition to have nearly the original cooling characteristics which the fresh medium has before use, and a water-soluble quenching medium thus restored to its original condition to have nearly the original cooling characteristics thereof. The method comprises adding to a quenching bath being used an aqueous solution comprising a water-soluble polymer (B) that has a larger weight average molecular weight than that of the water-soluble polymer (A) existing in the fresh water-soluble quenching medium to be in the fresh bath.
公开/授权文献
- US5382367A Method of treating cooling water systems 公开/授权日：1995-01-17
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