发明授权
- 专利标题: Method of preventing scale adhesion to the surfaces of a polymerization tank and the like
- 专利标题(中): 防止水垢附着在聚合槽等表面的方法
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申请号: US470474申请日: 1995-06-06
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公开(公告)号: US5674954A公开(公告)日: 1997-10-07
- 发明人: Seiichi Masuko , Ichisaburo Nakamura , Yoshimatsu Naka , Keiichi Fukuda , Akira Yamamoto , Yasuyuki Hatakeyama
- 申请人: Seiichi Masuko , Ichisaburo Nakamura , Yoshimatsu Naka , Keiichi Fukuda , Akira Yamamoto , Yasuyuki Hatakeyama
- 申请人地址: JPX Tokyo
- 专利权人: Mitsui Toatsu Chemicals, Inc.
- 当前专利权人: Mitsui Toatsu Chemicals, Inc.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX338205/1989 19891228; JPX181538/1990 19900711; JPX225188/1990 19900829; JPX227952/1990 19900831; JPX291870/1990 19901031; JPX323139/1990 19901128
- 主分类号: C08F2/00
- IPC分类号: C08F2/00 ; C08F14/06 ; C08F2/20
摘要:
In a novel method of homo- or copolymerization of vinyl chloride, a specified coating agent is applied on the surfaces of the portions which will become into contact with the vinyl chloride monomer during the polymerization process. The coating agent is in a form of an aqueous solution of a modified condensation product of phenol and aldehyde, the pH of the solution being adjusted in a range that the product is dissolved at an ambient temperature upon coating of the solution and separates out of the solution upon being heated on the surfaces. The wall surface of the polymerization tank and the like is then coated with a thin film of the coating agent having a uniform thickness and being strongly adhered to the wall surface, thereby providing an excellent effect of preventing adhesion of the product polymer to the wall surface.
公开/授权文献
- US5037269A Self-locking nozzle blocks for steam turbines 公开/授权日:1991-08-06