Colloid systems and wetting agents; subcombinations thereof; pro – Compositions containing an agent for breaking ; processes of... – Continuous liquid phase colloid system and discontinuous gas...
Patent
1997-07-03
2000-01-18
Lovering, Richard D.
Colloid systems and wetting agents; subcombinations thereof; pro
Compositions containing an agent for breaking ; processes of...
Continuous liquid phase colloid system and discontinuous gas...
516204, 510235, 510535, B01D 1904, C11D 172
Patent
active
060158395
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to anti-foaming compositions comprising at least one nonionic defoaming surfactant as well as a solubilizing agent.
DESCRIPTION OF THE RELATED ART
Certain cleaning compositions in industrial cleaning operations, such as the cleaning of bottles or, the washing of floors, may lead to the formation of a large amount of foam. This is due in particular to the presence of food soiling or adhesive residues present on the bottles. In order to reduce, or even prevent, the formation of this foam, it is known to add one or more defoaming surfactants to the cleaning composition. These defoaming surfactants are generally of the nonionic type. However, these defoaming surfactants are of limited use on account of their low solubility in very concentrated alkaline cleaning compositions, which may comprise up to 50% by weight of sodium hydroxide or of potassium hydroxide. Under these conditions, the said defoaming surfactants are sparingly soluble. In order to avoid having to decrease the concentration of alkaline agents to the detriment of the cleaning performance, it is known to combine the defoaming surfactant with solubilizing agents such as cumene sulfonates and xylene sulfonates or organic solvents.
Alkylpolyglycosides have also been described as solubilizing agents for nonionic defoaming surfactants. Alkylpolyglycosides are well-known nonionic surfactants. Their manufacturing process is described, for example, in patent application EP-A-0, 077, 167.
Patent application EP-A-0, 489, 777 describes anti-foaming compositions comprising alkylpolyglycosides whose alkyl chain comprises from 6 to 12 carbon atoms. However, the only alkylpolyglycosides marketed to date as solubilizing agents for defoaming nonionic surfactants are 50/50 mixtures (by weight) of alkylpolyglycosides having, respectively, an alkyl chain containing 8 carbon atoms and an alkyl chain containing 10 carbon atoms. This type of solubilizing agents [sic] is marketed by the company Union Carbide under the brand name Triton BG 10.
SUMMARY OF THE INVENTION
A first subject of the present invention consists of an anti-foaming composition comprising a nonionic surfactant and a specific alkylpolyglycoside, this composition having a good power for solubilizing the defoaming surfactant.
According to another aspect, the invention also relates to a cleaning composition comprising an anti-foaming composition based on (i) a defoaming nonionic surfactant and (ii) the said specific alkylpolyglycoside.
The invention thus relates to an anti-foaming composition comprising at least one defoaming nonionic surfactant and at least one alkylpolyglycoside of formula (I):
It has been observed that such an alkylpolyglycoside makes it possible, surprisingly, to reinforce the anti-foaming effect of the said nonionic surfactant. There is thus genuine synergism between the latter and the compound of formula (I).
The residue Z may be chosen from the residues of the following compounds: glucose, dextrose, sucrose, fructose, galactose, maltose, maltotriose, lactose, celobiose, mannose, ribose, dextran, tallose, xylose and levoglucosan. Among these compounds, dextrose, fructose and maltose are preferred, glucose being most particularly preferred.
According to an advantageous aspect of the invention, n is between 1.1 and 2.
The nonionic defoaming surfactants according to the invention are generally chosen from those comprising one or more groups chosen from monoethoxylated (EO) or polyethoxylated (PEO) groups, of formula (CH.sub.2 CH.sub.2 O)n, and monopropoxylated (PO) or polypropoxylated (PPO) groups, of formulae ##STR1## n and m, which may be identical or different, being between 1 and 50. A nonionic defoaming surfactant according to the invention may contain one or more ethoxylated or propoxylated groups, these groups being distributed in a random or block manner. These ethoxylated or propoxylated groups may or may not be blocked with a C.sub.4 -C.sub.8 alkyl radical, preferably a butyl radical, with a benzyl radical or wi
REFERENCES:
patent: 3567784 (1971-03-01), Tsatsos et al.
patent: 3752857 (1973-08-01), Milligan
patent: 3956401 (1976-05-01), Scardera et al.
patent: 4070298 (1978-01-01), Scardera et al.
patent: 4134854 (1979-01-01), Milligan
patent: 4240921 (1980-12-01), Kaniecki
patent: 4836951 (1989-06-01), Totten et al.
patent: 4923976 (1990-05-01), Arnaudis
patent: 5154850 (1992-10-01), Deguchi et al.
patent: 5205959 (1993-04-01), Schmid et al.
patent: 5556573 (1996-09-01), Weuthen et al.
patent: 5681949 (1997-10-01), Johansson et al.
patent: 5928993 (1999-07-01), Johansson
Database WPIDS on STN, week 9140, London: Derwent Publications Ltd., AN 989038, class A97, DE 40 09 533 A (Henkel KGAA), Abstract, 1991.
Lovering Richard D.
Metzmaier Daniel S.
Societe d'Exploitation de Produits pour les Industries Chimiques
LandOfFree
Anti-foaming composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Anti-foaming composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-foaming composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-563872