Alkali metal acrylate polymer excellent in salt solution absorbency and process for producing same
Номер патента: CA1166792A
Опубликовано: 01-05-1984
Автор(ы): Koichi Fujiki, Morio Nakamura, Shigeji Obayashi, Takushi Yamamoto
Принадлежит: Seitetsu Kagaku Co Ltd
Опубликовано: 01-05-1984
Автор(ы): Koichi Fujiki, Morio Nakamura, Shigeji Obayashi, Takushi Yamamoto
Принадлежит: Seitetsu Kagaku Co Ltd
Реферат: ABSTRACT OF THE DISCLOSURE An alkali metal acrylate polymer obtained by suspending an aqueous solution of acrylic acid and an alkali metal acrylate in an alicyclic or aliphatic hydrocarbon solvent containing a surfactant having an HLB value of 8-12 and subjecting the suspension to inverse suspension polymerization in the presence of a water-soluble radical polymerization initiator has a much higher water-absorbency and particularly salt solution-absorbency than known ones. If said polymer is crosslinked with a crosslinking agent, its stability in the fluid-absorbed state for a long period of time is improved and the absorption rate when absorbing water is also improved.
Method for producing powder dispersant composition for hydraulic composition
Номер патента: EP4083087A1. Автор: Kohei Shimada,Keiichirou SAGAWA. Владелец: Kao Corp. Дата публикации: 2022-11-02.