Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Patent
1996-06-10
1998-01-13
Hertzog, Ardith
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
510219, 510413, 510506, 510514, 510535, C11D 1722, C11D 172, C11D 1825
Patent
active
057079560
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to nonionic detergent mixtures based on selected mixed ether types and to their use for the production of surface-active formulations.
2. Discussion of Related Art
The presence of foam is extremely undesirable in a number of industrial processes. For example, both in the machine washing of beer bottles or milk bottles and in the spray cleaning of automobile panels, it is not only the cleaning or degreasing effect of the surface-active formulations used which is crucial, the avoidance of form which can severely impair the operation of equipment is equally important. This is all the more so insofar as highly active but also high-foaming anionic surfactants are used in many cases.
The problem of foam regulation has certainly been known for some time with the result that several more or less convincing solutions are known from the prior art. These known solutions may be divided into two groups:
The first group comprises processes involving the addition of defoamers which are often paraffinic hydrocarbons or silicone compounds. In most cases, however, this is undesirable for the described applications. The second group of processes involves the use of surface-active formulations which are themselves low-foaming and which, optionally, many also exhibit defoaming properties. The surface-active formulations in question are generally nonionic surfactants or surfactant-like systems such as, for example, fatty alcohol propylene glycol ethers or block polymers of ethylene and propylene glycol which, unfortunately, are not sufficiently biodegradable.
End-capped fatty alcohol polyglycol ethers, so-called "mixed ethers", which are described for example by R. Piorr in Fat. Sci. Technol. 89, 106 (1987), have established themselves on the market as particularly effective low-foaming surfactants.
The use of mixed ethers as low-foaming surfactants has also been extensively described in the patent literature. For example, EP-A 0 124 815 (Henkel) describes mixed ethers containing 8 to 18 carbon atoms in the fatty alkyl chain and 7 to 12 ethylene oxide units in the polyether chain as foam-suppressing additives for low-foaming cleaning formulations. Octyl and/or decyl mixed ethers containing 3 to 4 ethylene oxide units are proposed for the same purpose in EP-B 0 303 928 (Henkel).
According to EP-A 0 180 081 (BASF), mixed ethers containing 6 to 12 carbon atoms in the fatty alkyl chain and EO/PO/EO blocks in the polyether chain may be used for suppressing foam in the processing of foods and in fermentation processes. According to the teaching of EP-B 0 324 340 (Henkel), mixed ethers containing 6 to 28 carbon atoms in the fatty alkyl chain and 2 to 10 ethylene oxide units in the polyether chain may be used for the same purpose. In addition, DE-A 39 28 600 (Henkel) describes nonionic surfactant mixtures containing non-end-capped fatty alcohol polyalkylene glycol ethers in addition to various types of mixed ethers.
EP-A 0 420 802 (Ciba-Geigy) describes wetting agents containing open-chain and/or end-capped fatty alcohol polyglycol ethers for the pretreatment of textiles. Starting materials containing a fatty alkyl chain of at least 8 and preferably 9 to 14 carbon atoms and 2 to 24 and preferably 4 to 8 alkylene oxide units in the polyether chain are disclosed as suitable; they may have open chains or may be end-capped by a C.sub.1-8 alkyl group, a cycloaliphatic radical containing at least 5 carbon atoms or a phenyl lower alkyl or styryl group. The only Example refers solely to the use of an open-chain adduct of 15 moles of alkylene oxide with a C.sub.9-11 oxoalcohol.
Finally, mixed ethers based on linear fatty alcohol PO EO adducts which contain 8 to 10 carbon atoms in the fatty alkyl chain, 0.5 to 2 moles of propylene oxide and 7 to 9 moles of ethylene oxide in the molecule and which are end-capped by a C.sub.1-4 alkyl radical are known from DE-C1 42 43 634 (Henkel).
A particular problem involved in the optimization of mixed ethers is to balance the need f
REFERENCES:
patent: 4548729 (1985-10-01), Schmid et al.
patent: 4624803 (1986-11-01), Balzer et al.
patent: 4753885 (1988-06-01), Dietsche et al.
patent: 4780237 (1988-10-01), Schmid et al.
patent: 4853145 (1989-08-01), Schmid et al.
patent: 4942049 (1990-07-01), Schmid et al.
patent: 4965019 (1990-10-01), Schmid et al.
patent: 4973423 (1990-11-01), Geke et al.
patent: 5205959 (1993-04-01), Schmid et al.
patent: 5308401 (1994-05-01), Geke et al.
patent: 5484553 (1996-01-01), Guth et al.
Fat Sci. Technol. 89, 106 (1987).
Tens. Surf. Det. 27, 243 (1990).
Fette, Seifen, Anmtstrichmitt., 87, 421 (1985).
Koren Karin
Schmid Karl
Stanislowski Detlev
Weuthen Manfred
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Hertzog Ardith
Jaeschke Wayne C.
Szoke Ernest G.
LandOfFree
Nonionic detergent mixtures based on specific mixed ethers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nonionic detergent mixtures based on specific mixed ethers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonionic detergent mixtures based on specific mixed ethers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-326161