Title:
水硬性組成物用粉末分散剤組成物の製造方法
Document Type and Number:
Japanese Patent JP7286609
Kind Code:
B2
Abstract:
To provide a method of producing a powder dispersant composition for hydraulic composition, the method capable of producing a polycarboxylic acid-based dispersant in a powder state at a high yield.SOLUTION: The method of producing a powder dispersant composition for hydraulic composition is a method of producing powders containing copolymer obtained by dehydrating a mixture of the copolymer and water, the copolymer having a constituent unit (1) expressed by a specified formula and a constituent unit (2) expressed by a specified formula. In a case where n of the constituent unit (2) of the copolymer is smaller than 40, the dehydration is performed by the thin film drying method or the spray drying method after adjusting pH of the mixture to 11 or higher and 14 or lower; in a case where n of the constituent unit (2) of the copolymer is 40 or larger and smaller than 80, the dehydration is performed by the thin-film dry method or the spray dry method after adjusting pH of the mixture to 9 or higher and 14 or lower; and in a case where n of the constituent unit (2) of the copolymer is 80 or larger, the dehydration is performed by the thin-film dry method or the spray dry method after adjusting pH of the mixture to 7 or higher and 14 or lower.SELECTED DRAWING: None
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Inventors:
Kohei Shimada
Keiichiro Sagawa
Keiichiro Sagawa
Application Number:
JP2020213413A
Publication Date:
June 05, 2023
Filing Date:
December 23, 2020
Export Citation:
Assignee:
Kao Corporation
International Classes:
C04B24/26; C04B28/02; C08F216/16; C08F220/06; C08F220/28; C08F290/06
Domestic Patent References:
| JP2001213671A | ||||
| JP2000169206A | ||||
| JP2001002788A | ||||
| JP2004211059A |
Foreign References:
| WO2006059723A1 |
Attorney, Agent or Firm:
Satoshi Furuya
Yoshitsune Kazumasa
Yoshitsune Kazumasa