Peg free stable low viscosity oil-in-water emulsion and use thereof
The present invention relates to a PEG free, stable, low viscosity classic oil-in-water emulsion and the use and preparation thereof. The oil-in-water emulsion comprises, A) a primary emulsifier selected from alkyl polyglucosides and long chained polyglycerol esters, B) a secondary emulsifier selected from short chained polyglycerol esters and short chained sorbitan esters, and optionally a thickener if the amount of secondary emulsifier is below 2.5 wt. %. The emulsion is a classic emulsion and can be sprayable. The emulsion is suitable to prepare spray or foam emulsion products with good application effect.
1. An oil-in-water emulsion, comprising,
A) from 0.1 to 6 wt % based in the total weight of the oil-in-water emulsion of a primary emulsifier selected from the group consisting of
A1) alkyl polyglucosides with alkyl modifications out of the chemical class of linear or branched, saturated or unsaturated fatty alcohols with a chain length of C16 to C18 wherein the alkyl polyglucoside has a glucoside polymerization degree of from 1.0 to 1.7; and
A2) long chained polyglycerol esters with fatty acid moiety out of the chemical class of linear or branched, saturated or unsaturated fatty acids with a chain length of C16-C22; wherein the long chained polyglycerol ester has a glycerin polymerization degree of 5-12; wherein the molar ratio of polyglycerol moiety to fatty acid moiety is in the range of 0.3-2.5;
and
B) from 0.05 to less than 2.5 wt % based in the total weight of the oil-in-water emulsion of a secondary emulsifier selected from the group consisting of
B1) short chained polyglycerol esters prepared from linear or branched, saturated or unsaturated fatty acids with a chain length of C8-C12; wherein the short chained polyglycerol ester has a glycerin polymerization degree of 3-5; and wherein the molar ratio of polyglycerol moiety to fatty acid moiety is in the range of 0.2-2; and
B2) short chained sorbitan esters prepared from linear or branched, saturated or unsaturated fatty acids with a chain length of C8-C12; wherein the molar ratio of sorbitan moiety to fatty acid moiety is in the range of 0.2-2;
provided that the emulsion further comprises a thickener with an amount of ≥0.05 wt. %, based on the total weight of the oil-in-water emulsion
wherein the oil-in-water emulsion does not include C12-C24 alcohol and the viscosity of the oil-in-water emulsion is between 5 mPas and 1200 mPas, with the measurement using Brookfield RVT, SP04, 100 rpm.
2. The oil-in-water emulsion of claim 1 , wherein the viscosity of the oil-in-water emulsion is between 10 mPas and 1000 mPas, with the measurement using Brookfield RVT, SP04, 100 rpm.
3. The oil-in-water emulsion of claim 1 , wherein the mean droplet size of the oil-in-water emulsion is from 0.8 μm to 3 μm.
4. The oil-in-water emulsion of claim 1 , wherein the weight ratio of emulsifier/oil in the emulsion is ≤1/2.5.
5. The oil-in-water emulsion of claim 1 , wherein the emulsion is PEG free.
6. The oil-in-water emulsion of claim 1 , wherein the emulsion is sprayable.
7. The oil-in-water emulsion of claim 1 , wherein the emulsion comprises thickeners of from 0.07-0.10 wt. % of carbomer and from 0.01-0.05 wt. % of gellan gum, the wt % based on the total weight of the emulsion.
8. The oil-in-water emulsion of claim 1 , wherein the secondary emulsifier is selected from the group consisting of polyglyceryl-3 caprate, polyglyceryl-4 caprate, polyglyceryl-4 laurate, polyglyceryl-3 caprylate/caprate, sorbitan laurate, sorbitan sesquicaprylate, and any mixtures thereof.
9. A cosmetic, dermatological or pharmaceutical preparation, or cleaning preparation and/or care preparation for the household and industry, comprising the oil-in-water emulsion of claim 1 .
10. A cosmetic, dermatological or pharmaceutical product, or a cleaning product and/or care product for the household and industry, comprising the oil-in-water emulsion of claim 1 and a package.
11. The oil-in-water emulsion of claim 1 , wherein the long chained polyglycerol ester has a glycerin polymerization degree of 5-12; wherein the molar ratio of polyglycerol to fatty acid moiety is in the range of 0.4-2; and
B) a secondary emulsifier selected from the group consisting of
B1) short chained polyglycerol esters prepared from linear or branched,
saturated or unsaturated fatty acids with a chain length of C10-12; wherein the short chained polyglycerol ester has a glycerin polymerization degree of 3-5; wherein the molar ratio of polyglycerol moiety to fatty acid moiety is in the range of 0.3-1.8; and
B2) short chained sorbitan esters prepared from linear or branched, saturated or unsaturated fatty acids with a chain length of C10-12; wherein the molar ratio of sorbitan moiety to fatty acid moiety is in the range of 0.3-1.8,
wherein the oil-in-water emulsion does not include C12-C24 alcohol and the viscosity of the oil-in-water emulsion is between 5 mPas and 1000 mPas, with the measurement using Brookfield RVT, SP04, 100 rpm.
12. The oil-in-water emulsion of claim 11 , wherein the viscosity of the oil-in-water emulsion is between 10 mPas and 600 mPas, with the measurement using Brookfield RVT, SP04, 100 rpm.
13. The oil-in-water emulsion of claim 12 , wherein the mean droplet size of the oil-in-water emulsion is from 0.8 μm to 3 μm.
14. The oil-in-water emulsion of claim 11 , wherein the weight ratio of emulsifier/oil in the emulsion is less than 1/4.
15. The oil-in-water emulsion of claim 11 , wherein the weight ratio of emulsifier/oil in the emulsion is less than 1/5.
16. The oil-in-water emulsion of claim 11 , wherein the emulsion is PEG free.
17. The oil-in-water emulsion of claim 11 , wherein the emulsion is sprayable.
18. The oil-in-water emulsion of claim 11 , wherein the emulsion comprises thickeners of 0.07-0.10 wt. % of carbomer and 0.01-0.05 wt. % of gellan gum.
19. The oil-in-water emulsion of claim 11 , wherein the emulsion comprises thickeners of 0.02-0.1 wt. % of carbomer and 0.01-0.05 wt. % of gellan gum.
20. The oil-in-water emulsion of claim 11 , wherein the secondary emulsifier is selected from the group consisting of: polyglyceryl-3 caprate, polyglyceryl-4 caprate, polyglyceryl-4 laurate, polyglyceryl-3 caprylate/caprate, sorbitan laurate, sorbitan sesquicaprylate, and any mixtures thereof.