Title:
METHOD FOR LAUNDERING AND DETERGENT COMPOSITION
Document Type and Number:
Japanese Patent JP3705392
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for laundering by which the detergency is excellent even when the concentration of a surfactant is low and which comprises performing laundering under conditions in which an increase in the pH of the laundering fluid occurs after a decrease in the hardness of the fluid and to obtain a detergent composition.
SOLUTION: This method comprises adding an alkali agent after a sequestrant is added or comprises effecting the dissolution or dispersion of an alkali agent after the dissolution or dispersion of the sequestrant. It may also comprises adding an alkali agent after the hardness of laundering water is lowered. Attention is paid to the pH during the course in which the hardness of the laundering fluid is slowly decreasing. When the decreasing hardness is 3.5°DH or above, the increase in pH with an alkali agent is delayed so that the pH may be 10.5 or below, whereupon high detergency can be attained. The detergent composition essentially consists of a surfactant, an alkali agent and a sequestrant.
Inventors:
Osamu Yamaguchi
Katsuhiko Kasai
Yoko Yamaguchi
Shigeru Tamura
Masaki wife
Hiroyuki Yamashita
Katsuhiko Kasai
Yoko Yamaguchi
Shigeru Tamura
Masaki wife
Hiroyuki Yamashita
Application Number:
JP7906897A
Publication Date:
October 12, 2005
Filing Date:
March 12, 1997
Export Citation:
Assignee:
Kao Corporation
International Classes:
D06L1/02; C11D3/08; C11D3/10; D06L1/16; (IPC1-7): D06L1/16; C11D3/08
Domestic Patent References:
| JP4345700A | ||||
| JP6369894A | ||||
| JP62225599A | ||||
| JP5513722A | ||||
| JP60227895A | ||||
| JP5279013A |
Foreign References:
| DE4128826A1 | ||||
| WO1997009414A1 |
Other References:
奥山春彦 皆川基 編,洗剤・洗浄の事典,株式会社朝倉書店,1990年11月25日,第245-253頁
Attorney, Agent or Firm:
Yoshinori Hosoda