Water absorbing agent, process for its production, and...

Details Water absorbing agent, process for its production, and... Water absorbing agent, process for its production, and...

2008-04-22

2008-04-22

Choi, Ling-Sui (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S383000, C525S119000, C525S329900, C525S381000

Reexamination Certificate

active

07361712

ABSTRACT:
A water absorbing agent comprising a crosslinked polymer including a water-soluble vinyl monomer (a1) and/or a vinyl monomer (a2) that is formed into the water-soluble vinyl monomer (a1) by hydrolysis, and a crosslinking agent (b) as an essential constituting unit, wherein the following formulae (1) and (2) are satisfied; a process for its production, and absorbers and absorbent articles made by the water absorbing agent.in-line-formulae description="In-line Formulae" end="lead"?(Y)≧−1.14(X)+69.5   (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?(X)=((x1)2+4×(x2)2)1/2  (2)in-line-formulae description="In-line Formulae" end="tail"?wherein (x1) denotes a water-retention amount (g/g) of the water absorbing agent after being soaked in a physiological saline for one hour; (x2) denotes an absorption amount (g/g) of the water absorbing agent after being soaked in a physiological saline under loading of 0.9 psi for one hour; and (Y) denotes a liquid permeation speed (ml/min) of a physiological saline after the water absorbing agent is soaked in a physiological saline under loading of 0.3 psi for one hour. The water-absorbing agent enables easy production of absorbent articles exhibiting high absorption performance in any state, and is suitable for use in disposable diapers, sanitary napkins, and other sanitary goods.

REFERENCES:
patent: 4666983 (1987-05-01), Tsubakimoto et al.
patent: 5883158 (1999-03-01), Nambu et al.
patent: 0 618 005 (1994-10-01), None
patent: 0 618 005 (1994-10-01), None
patent: 0 845 272 (1998-06-01), None
patent: 1 029 886 (2000-08-01), None
patent: 1 029 886 (2000-08-01), None
patent: 1 072 630 (2001-01-01), None
patent: 1 072 630 (2001-01-01), None
patent: 1 325 777 (2003-07-01), None
patent: 58-180233 (1983-10-01), None
patent: 59-189103 (1984-10-01), None
patent: 7-119246 (1991-02-01), None
patent: 3-179008 (1991-08-01), None
patent: 10-279693 (1998-10-01), None
patent: 11-286611 (1999-10-01), None
patent: 11-349625 (1999-12-01), None
patent: 2000-26510 (2000-01-01), None
patent: 2000-026510 (2000-01-01), None
patent: 2000-198853 (2000-07-01), None
patent: 3118779 (2000-10-01), None
patent: 2001-079829 (2001-03-01), None
patent: 2001-089527 (2001-04-01), None
patent: 2001-89527 (2001-04-01), None
patent: 2001-200006 (2001-07-01), None
patent: 2001-239159 (2001-09-01), None
Catalogue of Nippon Aerosil Co., LTD., No. 4 (Dec. 1981) and No. 7 (Dec. 1992).
T. Fujimoto, “New Introduction to Surface Active Agents”, Sanyo Chemical Industries, Ltd. p. 132, 1985.

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