Compositions – Preservative agents – Anti-corrosion
Patent
1996-05-14
1998-10-06
Lovering, Richard D.
Compositions
Preservative agents
Anti-corrosion
252314, 514938, 514941, B01J 1300
Patent
active
058172548
DESCRIPTION:
BRIEF SUMMARY
This application is filed under 35 U.S.C. .sctn. 371 and is based on PCT/EP94/03293, filed Oct. 5, 1994.
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an emulsion concentrate which is flowable and pumpable at normal temperature, to its use for the production of oil-in-water emulsions and to a process for the production of oil-in-water emulsions using the emulsion concentrate.
2. Statement of Related Art
The production of emulsion-like formulations normally involves considerable outlay on equipment because the disperse phase has to be liquefied by heating and dispersed in the continuous phase by application of shear forces. Various attempts have already been made to produce emulsion concentrates which can be diluted with the continuous phase in the absence of heat and shear forces.
For example, DE 23 05 087 C2 describes a self-emulsifying oil which can be spontaneously converted into an emulsion without heating by addition of water. One disadvantage of this self-emulsifying oil is that the emulsions produced with it are not particularly fine and, accordingly, are not stable in storage. Nor do they allow other oil components or relatively high-melting waxes to be incorporated during production of the emulsion.
DESCRIPTION OF THE INVENTION
Accordingly, the problem addressed by the present invention was to develop emulsion concentrates which would be flowable and pumpable at normal temperature and which could be further processed to emulsion-like preparations using water and oil components and optionally other additives without any need to apply heat and with only gentle stirring.
It has now surprisingly been found that this problem is solved by highly concentrated emulsions which contain hydrophilic emulsifiers and lipophilic co-emulsifiers in defined quantity ratios.
Accordingly, the present invention relates to an emulsion concentrate which is flowable and pumpable at 20.degree. C. and which contains water-insoluble oil components (A), hydrophilic nonionic emulsifiers (B), lipophilic co-emulsifiers (C) and water, characterized in that the water content is from 50 to 70% by weight, based on the concentrate, and components (A), (B) and (C) are present in a ratio by weight of A to B to C of 1:(0.31-1.5):(0.31-1.5).
Flowable or pumpable emulsion concentrates are those which have a viscosity at 20.degree. C. below 20 Pa.multidot.s, as measured with a Brookfield rotational viscosimeter (type RVF, spindle TE, 4 r.p.m.).
Suitable water-insoluble oil components are any fatty compounds liquid at 20.degree. C. or mixtures thereof, including mixtures of liquid and solid fatty compounds or paraffins dissolved therein providing the mixtures are liquid at 20.degree. C. or have a viscosity at 20.degree. C. below 20 Pa.multidot.s.
Suitable liquid oil components are, above all, hydrocarbons and fatty acid esters liquid at room temperature. Liquid hydrocarbons are, for example, paraffin oils, liquid polyolefins or alkyl cyclohexanes, for example 1,3-diisooctyl cyclohexane. Suitable liquid fatty acid esters are, for example, the methyl and isopropyl esters of fatty acids containing 12 to 22 carbon atoms, for example methyl laurate, methyl stearate, methyl oleate, methyl erucate, isopropyl palmitate, isopropyl stearate, isopropyl oleate. Other suitable oil components are n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl palmitate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyl dodecyl palmitate, oleyl oleate, oleyl erucate, erucyl oleate and esters obtainable from technical aliphatic alcohol mixtures and technical aliphatic carboxylic acids, for example esters of saturated and unsaturated fatty alcohols containing 12 to 22 carbon atoms and saturated and unsaturated fatty acids containing 12 to 22 carbon atoms which are obtainable from animal and vegetable fats. Naturally occurring liquid wax esters as present in sperm oil and jojoba oil are also suitable.
Suitable liquid dicarboxylic acid esters are, for exa
REFERENCES:
patent: 4798682 (1989-01-01), Ansmann
patent: 4883604 (1989-11-01), Veitenhansi et al.
patent: 4996004 (1991-02-01), Bucheler et al.
patent: 5139786 (1992-08-01), Ferrini et al.
patent: 5145603 (1992-09-01), Paasch et al.
patent: 5444041 (1995-08-01), Owen et al.
patent: 5494938 (1996-02-01), Kawa et al.
Database WPAT, Week 7433, London: Derwent Publications Ltd., AN-74-58602V/33, class D21, DE 2305087-A (Henkel & Cie GmbH), Abstract.
Ansmann Achim
Baumoeller Guido
Tesmann Holger
Wadle Armin
Henkel Kommanditgesellschaft auf Aktien
Jaeschke W. C.
Lovering Richard D.
Metzmaier Daniel S.
Millson Jr. Henry E.
LandOfFree
Free-flowing emulsion concentrate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Free-flowing emulsion concentrate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Free-flowing emulsion concentrate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-74097