Process for preparing color-stable water-absorbing polymer...

Details Process for preparing color-stable water-absorbing polymer... Process for preparing color-stable water-absorbing polymer...

2011-06-14

2011-06-14

Wu, David (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C502S402000, C528S503000

Reexamination Certificate

active

07960490

ABSTRACT:
The present invention relates to a process for producing water-absorbing polymeric particles by polymerizing a monomer solution comprising at least one ethylenically unsaturated acid-functional monomer less than 55 mol % neutralized and drying the resulting polymeric gel by means of a heated gas stream in at least two temperature zones.

REFERENCES:
patent: 4873299 (1989-10-01), Nowakowsky et al.
patent: 4920202 (1990-04-01), Irie et al.
patent: 5668252 (1997-09-01), Yokoi et al.
patent: 6207796 (2001-03-01), Dairoku et al.
patent: 7285615 (2007-10-01), Adachi et al.
patent: 2002/0120085 (2002-08-01), Matsumoto et al.
patent: 2004/0110914 (2004-06-01), Nakahara et al.
patent: 2008/0214749 (2008-09-01), Weismantel et al.
patent: 102005014291 (2006-09-01), None
patent: 0 238 050 (1987-09-01), None
patent: 0289338 (1988-11-01), None
patent: 1002806 (2000-05-01), None
patent: 1512417 (2005-03-01), None
patent: 1863852 (2007-12-01), None
patent: WO-2006/100300 (2006-09-01), None
Cairncross et al. Journal of Applied Polymer Science, 58(8), 1995.
Buchholz et al. (eds.),Modern Superabsorbent Polymer Technology, New York: Wiley-VCH, pp. 71-103 (1998).
Frank, “Superabsorbents”, IN:Ullmann's Encyclopedia of Industrial Chemistry, 6th ed., vol. 35, New York: Wiley-VCH (2003).
International Preliminary Report on Patentability (English translation) for PCT/EP2007/059759, dated Apr. 7, 2009.
International Search Report and Written Opinion for PCT/EP2007/059759, dated Jan. 17, 2008.

Affiliated with

Also associated with

Rating

Process for preparing color-stable water-absorbing polymer... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing color-stable water-absorbing polymer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing color-stable water-absorbing polymer... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2691157