Title:
防汚剤の施与方法
Document Type and Number:
Japanese Patent JP4863604
Kind Code:
B2
Abstract:
There is described a method for applying an aqueous solution to the internal walls of a reactor, before the start of the polymerization reaction of vinyl chloride and/or vinyl acetate, which aqueous solution contains a salt of an anti-scaling agent which comprises a product of condensation of an aldehyde, a phenolic compound and an aromatic carboxylic acid hydroxylated at the aromatic nucleus, wherein the pH-value of this aqueous solution is changed, during the application, to a pH-value of less than 5 and, preferably, in the range between 2.5 and 4.5.
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Inventors:
Carlin, Francesco
Application Number:
JP2003582196A
Publication Date:
January 25, 2012
Filing Date:
April 11, 2002
Export Citation:
Assignee:
Akzo Nobel N.V.
International Classes:
C08F2/00; C08F14/00; C08F14/06; C08F18/00; C08F18/08
Domestic Patent References:
| JP2001504889A |
Foreign References:
| WO1991009879A1 |
Attorney, Agent or Firm:
Hiroshi Kobayashi
Eiji Katayama
Norio Omori
Yasuhito Suzuki
Eiji Katayama
Norio Omori
Yasuhito Suzuki