Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-04-19
2005-04-19
Lipman, Bernard (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C428S402000, C264S540000, C525S192000, C525S197000, C525S417000
Reexamination Certificate
active
06881792
ABSTRACT:
The present invention provides: a production process for a basic water-absorbent resin to be a main component of a water-absorbing agent which exhibits an excellent water absorption capacity under a load with high productivity; a production process for a water-absorbing agent; and use thereof. The production process for an irregular shape basic water-absorbent resin comprises the step of reacting a basic resin and a crosslinking agent in order to obtain the basic water-absorbent resin, with the process forwarding a crosslinking reaction and pulverizing the resultant product at the same time. The first production process for a water-absorbing agent comprises the step of blending an acidic water-absorbent resin with the basic water-absorbent resin obtained by the above-mentioned process. The second production process for a water-absorbing agent comprises the step of obtaining a mixture of an acidic water-absorbent resin and the basic water-absorbent resin by coexisting with the acidic water-absorbent resin when carrying out the crosslinking reaction and the pulverization in the above-mentioned process.
REFERENCES:
patent: 4076663 (1978-02-01), Masuda et al.
patent: 4320040 (1982-03-01), Fujita et al.
patent: 4833222 (1989-05-01), Siddall et al.
patent: 5118719 (1992-06-01), Lind
patent: 5149750 (1992-09-01), Niessner et al.
patent: 5154713 (1992-10-01), Lind
patent: 5264495 (1993-11-01), Irie et al.
patent: 5981689 (1999-11-01), Mitchell et al.
patent: 6254990 (2001-07-01), Ishizaki et al.
patent: 0372981 (1990-06-01), None
patent: 0496594 (1992-07-01), None
patent: 0937739 (1999-08-01), None
patent: 0949290 (1999-10-01), None
patent: 492350 (1974-01-01), None
patent: 9615180 (1996-05-01), None
patent: 9617681 (1996-06-01), None
patent: 9824832 (1998-06-01), None
patent: 9837149 (1998-08-01), None
patent: 9925393 (1999-05-01), None
patent: 9930751 (1999-06-01), None
patent: 9934841 (1999-07-01), None
patent: 9934842 (1999-07-01), None
patent: 9934843 (1999-07-01), None
patent: 9947587 (1999-09-01), None
patent: 0009612 (2000-02-01), None
Adachi Yoshifumi
Harada Nobuyuki
Hitomi Kazuhisa
Kitayama Toshimasa
Sakamoto Shigeru
Lipman Bernard
Nippon Shokubai Co. , Ltd.
Roylance Abrams Berdo & Goodman L.L.P.
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