Water-absorbing agent

Details Water-absorbing agent Water-absorbing agent

2004-02-02

2009-12-29

Woodward, Ana L (Department: 1796)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S436000, C524S437000, C524S444000, C524S445000, C524S447000, C524S451000, C524S543000, C524S556000, C524S560000, C502S400000, C502S401000, C502S402000, C604S358000

Reexamination Certificate

active

07638570

ABSTRACT:
There is disclosed a water-absorbing agent which combines both performances of the capillary suction force and the liquid permeability. This water-absorbing agent is a particulate water-absorbing agent comprising water-absorbent resin particles (α) and a liquid-permeability-enhancing agent (β), wherein the water-absorbent resin particles (α) are surface-crosslink-treated particles of a crosslinked polymer of a monomer including acrylic acid and/or its salt; with the water-absorbing agent being characterized in that the particulate water-absorbing agent has: a mass-average particle diameter (D50) in the range of 234 to 394 gm, a logarithmic standard deviation (σζ) of a particle diameter distribution in the range of 0.25 to 0.45, an absorption capacity without load (CRC) of not less than 15 g/g, and a water-extractable component content of not higher than 15 mass %; and further a liquid-permeability-enhancing agent (β) content in the range of 0.01 to 5 mass parts per 100 mass parts of the water-absorbent resin particles (α).

REFERENCES:
patent: 4093776 (1978-06-01), Aoki et al.
patent: 4367323 (1983-01-01), Kitamura et al.
patent: 4446261 (1984-05-01), Yamasaki et al.
patent: 4625001 (1986-11-01), Tsubakimoto et al.
patent: 4683274 (1987-07-01), Nakamura et al.
patent: 4690996 (1987-09-01), Shih et al.
patent: 4721647 (1988-01-01), Nakanishi et al.
patent: 4734478 (1988-03-01), Tsubakimoto et al.
patent: 4738867 (1988-04-01), Itoh et al.
patent: 4748076 (1988-05-01), Saotome
patent: 4769427 (1988-09-01), Nowakowsky et al.
patent: 4876299 (1989-10-01), Avar
patent: 4950692 (1990-08-01), Lewis et al.
patent: 5051259 (1991-09-01), Olsen et al.
patent: 5164459 (1992-11-01), Kimura et al.
patent: 5264495 (1993-11-01), Irie et al.
patent: 5419956 (1995-05-01), Roe
patent: 5478879 (1995-12-01), Kajikawa et al.
patent: 5760080 (1998-06-01), Wada et al.
patent: 5797893 (1998-08-01), Wada et al.
patent: 5849405 (1998-12-01), Wang et al.
patent: 5851672 (1998-12-01), Wang et al.
patent: 6054541 (2000-04-01), Wada et al.
patent: 6087450 (2000-07-01), Breitbach et al.
patent: 6099950 (2000-08-01), Wang et al.
patent: 6180724 (2001-01-01), Wada et al.
patent: 6228930 (2001-05-01), Dairoku et al.
patent: 6391451 (2002-05-01), Mitchell et al.
patent: 6414214 (2002-07-01), Engelhardt et al.
patent: 6433058 (2002-08-01), Weir et al.
patent: 6605673 (2003-08-01), Mertens et al.
patent: 6620889 (2003-09-01), Mertens et al.
patent: RE38444 (2004-02-01), Wada et al.
patent: 2002/0128618 (2002-09-01), Frenz et al.
patent: 2002/0169252 (2002-11-01), Wilson
patent: 2002/0193492 (2002-12-01), Wilson
patent: 2003/0020199 (2003-01-01), Kajikawa et al.
patent: 2003/0060112 (2003-03-01), Rezai et al.
patent: 2003/0207997 (2003-11-01), Mertens et al.
patent: 2007/0129495 (2007-06-01), Mertens et al.
patent: 198 13 443 (1998-10-01), None
patent: 0 349 240 (1990-01-01), None
patent: 0 640 330 (1993-03-01), None
patent: 0 629 411 (1994-12-01), None
patent: 0 668 080 (1995-08-01), None
patent: 0 761 241 (1997-03-01), None
patent: 0 844 270 (1998-05-01), None
patent: 0 579 764 (1999-08-01), None
patent: 0 951 913 (1999-10-01), None
patent: 1 029 886 (2000-08-01), None
patent: 1 178 059 (2002-02-01), None
patent: 6-25209 (1994-04-01), None
patent: 07-116511 (1995-05-01), None
patent: 08-057310 (1996-03-01), None
patent: 9-509591 (1997-09-01), None
patent: 9-290000 (1997-11-01), None
patent: 11-58615 (1999-03-01), None
patent: 11-240959 (1999-09-01), None
patent: 2000-109714 (2000-04-01), None
patent: 2001-89527 (2001-04-01), None
patent: 2002-121291 (2002-04-01), None
patent: WO 95/22356 (1995-08-01), None
patent: WO 95/26209 (1995-10-01), None
patent: WO 96/01608 (1996-01-01), None
patent: WO 97/12575 (1997-04-01), None
patent: WO 97/25013 (1997-07-01), None
patent: WO 97/34558 (1997-09-01), None
patent: WO 98/06364 (1998-02-01), None
patent: WO 98/47454 (1998-10-01), None
patent: WO 98/48857 (1998-11-01), None
patent: WO 00/53644 (2000-09-01), None
patent: WO 00/53664 (2000-09-01), None
patent: WO 01/66056 (2001-09-01), None
patent: WO 01/89591 (2001-11-01), None
Modern Superabsorbent Polymer Technology, Wiley-VCH, ISBN 0-471-19411-5, pp. 72-74, 93-103, 130 and 131, 1997.
Ullmann's Encyclopedia of Industrial Chemistry, 6th Ed., vol. 35, Wiley-VCH, ISBN 3-527-30385-5, pp. 73, 80, 81, 84 and 85, 2003.

Affiliated with

Also associated with

Rating

Water-absorbing agent does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Water-absorbing agent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water-absorbing agent will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4138275