Einar P Birkelo

US Patent:

43671551, Jan 4, 1983

Filed:

May 7, 1981

Appl. No.:

6/261538

Inventors:

Einar P. Birkelo - Bloomington MN

Assignee:

Coustic-Glo International, Inc. - Minneapolis MN

International Classification:

C11D 702
C11D 714
C11D 718

US Classification:

252 99

Abstract:

The separately-packaged parts of the disclosed, liquid two-part brightening compositions can be combined and then sprayed or otherwise applied onto discolored surfaces (particularly internal walls and ceilings) for the purpose of treating the discoloration and substantially restoring a stain-free appearance. These compositions leave a minimal residue after spraying, which residue is substantially free of titratable chlorine after less than 60 hours at normal ambient temperatures. The spraying of the composition is generally not complicated by formation of stable foam. One part of the two-part system comprises an aqueous solution of a hypochlorite salt (e. g. NaOCl) and the other, separately packaged part comprises a nonionic surfactant dissolved in a water-soluble mono-lower alkyl ether of ethylene or diethylene glycol. Water is a suitable diluent for either or both parts. The preferred nonionic surfactants have emulsifying and/or detergent and/or surface tension-lowering properties and are ethoxylates, e. g.