Methods for controlling silica scale in aqueous systems

Details Methods for controlling silica scale in aqueous systems Methods for controlling silica scale in aqueous systems

2008-01-08

2008-01-08

Metzmaier, Daniel S. (Department: 1712)

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

C252S181000, C210S698000

Reexamination Certificate

active

07316787

ABSTRACT:
A method of controlling the deposition of silica containing scales and their adhesion to surfaces in contact with an aqueous system is disclosed which comprises adding to the aqueous system about 1-500 ppm of a water-soluble or dispersible hydrophobically modified polyether polymer. Exemplary hydrophobically modified polyether polymers include alkylene oxide hydrophilic backbone repeat units and hydrophobic groups that may be attached to the backbone at a variety of locations such as 1) at the ends of the backbones, 2) either regularly or randomly spaced along the backbone length, or 3) as linking groups to link two or more portions of the backbone together.

REFERENCES:
patent: 3875202 (1975-04-01), Steckler
patent: 4399109 (1983-08-01), Iler et al.
patent: 4405461 (1983-09-01), Rogers
patent: 4405463 (1983-09-01), Jost et al.
patent: 4510059 (1985-04-01), Amjad et al.
patent: 4532047 (1985-07-01), Dubin
patent: 4537684 (1985-08-01), Gallup et al.
patent: 4584104 (1986-04-01), Dubin
patent: 4659481 (1987-04-01), Chen
patent: 4717499 (1988-01-01), Chen
patent: 4732698 (1988-03-01), Chen
patent: 4756888 (1988-07-01), Gallup et al.
patent: 4830766 (1989-05-01), Gallup et al.
patent: 4895663 (1990-01-01), Chen
patent: 4933090 (1990-06-01), Gill et al.
patent: 5073270 (1991-12-01), Gallup et al.
patent: 5078891 (1992-01-01), Sherwood et al.
patent: 5100558 (1992-03-01), Brown et al.
patent: 5145656 (1992-09-01), Gallup et al.
patent: 5158685 (1992-10-01), Freese
patent: 5180498 (1993-01-01), Chen et al.
patent: 5190664 (1993-03-01), Gallup et al.
patent: 5200165 (1993-04-01), Harper et al.
patent: 5240687 (1993-08-01), Gallup et al.
patent: 5256302 (1993-10-01), Perez et al.
patent: 5277823 (1994-01-01), Hann et al.
patent: 5332505 (1994-07-01), Carey et al.
patent: 5393456 (1995-02-01), Perez et al.
patent: 5422010 (1995-06-01), Carey et al.
patent: 5574127 (1996-11-01), Sau
patent: 5575920 (1996-11-01), Freese et al.
patent: 5658465 (1997-08-01), Nicholas et al.
patent: 5665242 (1997-09-01), Gallup
patent: 5705665 (1998-01-01), Ichinohe et al.
patent: 6051142 (2000-04-01), Roe
patent: 6077440 (2000-06-01), Roe et al.
patent: 6153106 (2000-11-01), Kelley et al.
patent: 6162391 (2000-12-01), Kowata et al.
patent: 6348509 (2002-02-01), Reeve
patent: 6461518 (2002-10-01), Demadis et al.
patent: WO 00/51945 (2000-09-01), None
“Hercules Product Data AQUAFLOW NLS 200 and NHS 300” obtained online @ http://www.herc.com/aqualon/paint/paint—eu—data—sheet/images/pdf—files/37057e4.pdf , (Apr. 2000), pp. 1-2.
“Acronal Optive 220” obtained online @ http://www.basf.com/businesses/consumer/dispersions/Businesses/Coat/ArchCoat/acronal220.pdf , (Jul. 2001) pp. 1-2.
Acrysol® RM-8W Solvent-Free Nonionic Urethane Rheology Modifier for Latex Paints, Rohm and Haas, Jul. 1996 (2 pages).
Aquaflow™ NHS-300 Rheology Modifier for Waterborne Architectural Coatings, Hercules Incorporated, Aqualon Division, Product Data, No. 4201, Nov. 1999 (2 pages).
Good-Rite K-XP212 Copolymer, Material Safety Data Sheet., Noveon, Inc., Nov. 12, 2001 (7 pages).
Additives for Waterborne Industrial Coatings, Cognis Corporation, 2002 (5 pages) , month unknown.
Aquaflow® NHS-300 Rheology Modifier, Material Safety Data Sheet No. 999 8000 0036 Version 07, Hercules Incorporated, Aqualon Division, May 19, 2003 (5 pages).
Dai, S., et al., “Rheology and Aggregation Behavior of Hydrophobically Modified Urethane Ethoxylate in Ethylene Glycol—Water Mixtures”,Macromolecules, American Chemical Society, vol. 36, No. 16, Jul. 9, 2003 (pp. 6260-6266).
Surfynol® 440 Surfactant, Material Safety Data Sheet No. 300000004761, Air Products and Chemicals, Inc, Aug. 4, 2004, (6 pages).

Affiliated with

Also associated with

Rating

Methods for controlling silica scale in aqueous systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods for controlling silica scale in aqueous systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for controlling silica scale in aqueous systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2804229