Water-absorbing agent and production process therefor, and...

Details Water-absorbing agent and production process therefor, and... Water-absorbing agent and production process therefor, and...

2006-08-29

2006-08-29

Woodward, Ana (Department: 1711)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S318000

Reexamination Certificate

active

07098284

ABSTRACT:
The present invention provides: a novel water-absorbing agent, which exhibits an excellent absorption capacity under a load (AAP), gel layer liquid permeation rate under a load (FRUP), saline flow conductivity (SFC), and shape-maintaining property and ball burst strength (BBS) of a swollen water-absorbing agent aggregate, and excellent persistency of these effects for a long time. The water-absorbing agent, which comprises a polymer obtained by a process including the steps of polymerizing and then crosslinking a monomer including acrylic acid and/or a salt thereof, with the water-absorbing agent being characterized by: (1) exhibiting a free swelling capacity of not less than 23 g/g (GV), a gel deformation of not more than 12.5 cm under a short-time load (0.5 hrPT), and a gel deformation deterioration of not more than 3.5 cm under a load with the passage of time (ΔPT); (2) exhibiting a free swelling capacity of not less than 23 g/g (GV), a ball burst strength of not less than 80 gf (BBS), and a deterioration of ball burst strength of not more than 40% (DBBS); or (3) exhibiting a free swelling capacity of not less than 23 g/g (GV), an absorption capacity of not less than 20 g/g under a load of 4.9 kPa (AAP), and a gel deformation of not more than 12.5 cm under a load (16 hrPT).

REFERENCES:
patent: 3888257 (1975-06-01), Cook et al.
patent: 3935099 (1976-01-01), Weaver et al.
patent: 3959569 (1976-05-01), Burkholder, Jr.
patent: 4043952 (1977-08-01), Ganslaw et al.
patent: 4051086 (1977-09-01), Reid
patent: 4076663 (1978-02-01), Masuda et al.
patent: 4124748 (1978-11-01), Fujimoto et al.
patent: 4389513 (1983-06-01), Miyazaki
patent: 4625001 (1986-11-01), Tsubakimoto et al.
patent: 4654039 (1987-03-01), Brandt et al.
patent: 4666983 (1987-05-01), Tsubakimoto et al.
patent: 4734478 (1988-03-01), Tsubakimoto et al.
patent: 4755560 (1988-07-01), Ito et al.
patent: 5002986 (1991-03-01), Fujiura et al.
patent: 5164459 (1992-11-01), Kimura et al.
patent: 5250640 (1993-10-01), Irie et al.
patent: 5275773 (1994-01-01), Irie et al.
patent: 5281340 (1994-01-01), Sato et al.
patent: 5382610 (1995-01-01), Harada et al.
patent: 5409771 (1995-04-01), Dahmen et al.
patent: 5797893 (1998-08-01), Wada et al.
patent: 5981070 (1999-11-01), Ishizaki et al.
patent: 5985944 (1999-11-01), Ishizaki et al.
patent: 6011196 (2000-01-01), Wang et al.
patent: 6297319 (2001-10-01), Nagasuna et al.
patent: 4020780 (1991-08-01), None
patent: 0349240 (1990-01-01), None
patent: 0456136 (1991-11-01), None
patent: 0761241 (1997-03-01), None
patent: 0827753 (1998-03-01), None
patent: 1029886 (2000-08-01), None
patent: 51136588 (1976-11-01), None
patent: 52117393 (1977-10-01), None
patent: 58180233 (1983-10-01), None
patent: 59189103 (1984-10-01), None
patent: 6116903 (1986-01-01), None
patent: 61211305 (1986-09-01), None
patent: 61252212 (1986-11-01), None
patent: 61257235 (1986-11-01), None
patent: 61264006 (1986-11-01), None
patent: 627745 (1987-01-01), None
patent: 2227435 (1990-09-01), None
patent: 531362 (1993-02-01), None
patent: 569159 (1993-04-01), None
patent: 6370 (1994-01-01), None
patent: 853550 (1996-02-01), None
patent: 93123 (1997-01-01), None
patent: 2624089 (1997-04-01), None
patent: 9509591 (1997-09-01), None
patent: 9290000 (1997-11-01), None
patent: 3017584 (1999-12-01), None
patent: 200095955 (2000-04-01), None
patent: 2000197818 (2000-07-01), None
patent: 3107909 (2000-09-01), None
patent: 2000302876 (2000-10-01), None
patent: 2000342963 (2000-12-01), None
patent: 9522356 (1995-08-01), None
patent: WO 95/22355 (1995-08-01), None
patent: WO 95/22358 (1995-08-01), None
patent: 9605234 (1996-02-01), None
patent: 9617884 (1996-06-01), None
patent: 9703114 (1997-01-01), None
patent: 9739780 (1997-10-01), None
patent: 9925393 (1999-05-01), None
patent: 9934841 (1999-07-01), None
patent: 9934842 (1999-07-01), None
patent: 9934843 (1999-07-01), None
patent: 9942494 (1999-08-01), None
patent: 9943720 (1999-09-01), None
patent: 0031153 (2000-06-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3713448