Title:
A disposal method of a cooling-water system
Document Type and Number:
Japanese Patent JP6113992
Kind Code:
B2
Abstract:
A method for treating a cooling water system comprises adding, in a cooling water system having calcium hardness of 250 mg/L or less as CaCO 3 , a treatment agent containing a (meth)acrylic acid-based copolymer The (meth)acrylic acid-based copolymer comprises a structural unit (a) derived from a (meth)acrylic acid-based monomer (A) represented by the following general formula (1) and a structural unit (b) derived from a specific (meth)allyl ether-based monomer (B) represented by the following general formula (2), a content of the structural unit (b) is 1 to 15 mol% relative to 100 mol% of structural units derived from all the monomers, a weight average molecular weight of the (meth)acrylic acid-based copolymer is 7,000 to 28,000, and at least one of the main chain terminals of the (meth)acrylic acid-based copolymer is a sulfonic acid group or a salt thereof.
Inventors:
Nishida Ikuko
Naohiro Nagai
Takanori Yoshino
Masato Nakano
Yuki Sano
Naohiro Nagai
Takanori Yoshino
Masato Nakano
Yuki Sano
Application Number:
JP2012221515A
Publication Date:
April 12, 2017
Filing Date:
October 03, 2012
Export Citation:
Assignee:
Kurita Water Industries Ltd.
Nippon Shokubai Co., Ltd.
Nippon Shokubai Co., Ltd.
International Classes:
C23F11/173; C02F1/68; C02F5/00; C02F5/10; C08F220/06; F28F19/00
Domestic Patent References:
| JP2002003536A | ||||
| JP2004211137A | ||||
| JP2011202243A | ||||
| JP2005264190A |
Attorney, Agent or Firm:
Tamotsu Otani
Makoto Kataoka
Makoto Kataoka