Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2007-11-27
2007-11-27
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S164600, C162S166000, C162S168200, C564S281000, C564S291000, C564S292000, C564S295000, C526S088000, C526S217000, C526S312000
Reexamination Certificate
active
10517011
ABSTRACT:
A water-soluble polymer dispersion, process for producing the same and a method of use therefor. In particular, the water-soluble polymer dispersion is one comprising water-soluble polymer fine particles of 100 μm or less diameter having at least one ionic property selected from among cationic, amphoteric, nonionic and anionic properties together with a polyalkyleneimine and/or a product of polyalkyleneimine modification wherein according to necessity an appropriate amount of water-soluble inorganic salt is incorporated. The provided process enables easily performing the production in dispersed form by means of production facilities of low cost. The obtained water-soluble polymer dispersion is excellent in storage stability and exhibits satisfactory fluidity and solubility so as to enable use in papermaking raw material pretreatments added to papermaking raw materials prior to machine operation and also for enhancement of freeness, increase of sizing degree and enhancement of yield. Further use can be found in incorporation in an organic sludge or paper mill sludge for flocculation and ensuing drainage.
REFERENCES:
patent: 3632559 (1972-01-01), Matter et al.
patent: 4054542 (1977-10-01), Buckman et al.
patent: 4250112 (1981-02-01), Lobach et al.
patent: 4250269 (1981-02-01), Buckman et al.
patent: 4380600 (1983-04-01), Hosoda et al.
patent: 5009880 (1991-04-01), Grollier et al.
patent: 5274055 (1993-12-01), Honig et al.
patent: 5760386 (1998-06-01), Ward
patent: 5840804 (1998-11-01), Carl et al.
patent: 5912306 (1999-06-01), Pudney et al.
patent: 5952394 (1999-09-01), Nguyen
patent: 6217778 (2001-04-01), Shing et al.
patent: 0 262 945 (1988-04-01), None
patent: 2003-041136 (2003-02-01), None
patent: 2003-073570 (2003-03-01), None
patent: WO 99/14275 (1999-03-01), None
Odaka Emiko
Ohara Takumi
Yonemoto Ryousuke
Cordray Dennis
Hug Eric
Hymo Corporation
Weingarten Schurgin, Gagnebin & Lebovici LLP
LandOfFree
Water-soluble polymer dispersion, process for producing the... 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-soluble polymer dispersion, process for producing the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water-soluble polymer dispersion, process for producing the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3811409