Title:
吸水性樹脂粒子の製造方法
Document Type and Number:
Japanese Patent JP2010505003
Kind Code:
A
Abstract:
The present invention provides a method for producing a water absorbent resin particle, in high productivity, not only in a controlled manner of particle size but also enhancing fundamental property (absorption capacity or absorption capacity against pressure) of a water absorbent resin. A method for producing a water absorbent resin particle having the cross-linking polymerization step for an aqueous solution of an unsaturated monomer; the grain refining step for water-swellable, water-containing gel-like cross-linked polymer (a) obtained in the cross-linking polymerization step; the drying step for grain refined gel; and the crushing step for a dried substance, wherein, in the grain refining step for the water-swellable, water-containing gel-like cross-linked polymer (a), water-swellable, water-containing gel-like cross-linked polymer (b), having solid content or centrifuge retention capacity different from solid content or centrifuge retention capacity of the cross-linked polymer (a) by equal to or larger than 1%, is subjected to coexistence.
Inventors:
Shigeru Sakamoto
Yoshio Irie
Hiroyuki Ikeuchi
Makoto Nagasawa
石▲崎▼ 邦彦
Sayaka Machida
Yoshio Irie
Hiroyuki Ikeuchi
Makoto Nagasawa
石▲崎▼ 邦彦
Sayaka Machida
Application Number:
JP2007553409A
Publication Date:
February 18, 2010
Filing Date:
September 28, 2007
Export Citation:
Assignee:
Nippon Shokubai Co., Ltd.
International Classes:
C08J3/12
Domestic Patent References:
| JPH04227934A | 1992-08-18 | |||
| JP2001079829A | 2001-03-27 | |||
| JPH0543610A | 1993-02-23 | |||
| JP2004067878A | 2004-03-04 | |||
| JPH03152104A | 1991-06-28 | |||
| JPH0441532A | 1992-02-12 | |||
| JP2000007790A | 2000-01-11 |
Attorney, Agent or Firm:
Hatta International Patent Corporation