Michael S Lunski

US Patent:

58582797, Jan 12, 1999

Filed:

Oct 31, 1997

Appl. No.:

8/961864

Inventors:

Michael S. Lunski - Hightstown NJ
Steven A. Bolkan - Hopewell NJ

Assignee:

Church & Dwight Co., Inc - Princeton NJ

International Classification:

B01D 1904

US Classification:

252321

Abstract:

A defoaming composition comprising about 1 to about 90% by weight of a mixture of at least three defoaming agents, (a), (b), and (c) and about 99 to about 10% by weight of at least two stabilizers (d) and (e) therefor, and optionally a carrier therefor, where defoamer (a) is selected from a hydrophilic, fumed, particulate silica; defoamer (b) is an ethylene oxide-propylene oxide block copolymer; and defoamer (c) is a linear alcohol alkoxylate mixture of poly(oxyethylene/polyoxypropylene) mono- C. sub. 6, C. sub. 8, and C. sub. 10 alkyl ethers; stabilizer (d) is an ethoxylated C. sub. 12-18 fatty alcohol having a molecular weight of about 820; and stabilizer (e) is a cross-linked (meth)acrylic acid polymer.

US Patent:

55758576, Nov 19, 1996

Filed:

Jul 14, 1995

Appl. No.:

8/502641

Inventors:

Michael S. Lunski - Hightstown NJ
Richard A. Reynolds - Plainsboro NJ

Assignee:

Church & Dwight Co., Inc. - Princeton NJ

International Classification:

C02F 508
C02F 510
C23F 404

US Classification:

134 2

Abstract:

The scale formed by use of alkaline salt-based cleaners and which comprises one or more alkaline salts and organic scale is removed by applying an aqueous solution comprising alkali metal carbonate salts and optionally, a hydrotrope to remove the organic scale. A mixture of potassium and sodium carbonate salts has been found to effect better descaling than use of either of the salts alone.