Claims
- 1. A process for the preparation of an oil-in-water cream comprising the steps of
- I) forming an oil-in-water emulsion by heating the following composition to a temperature within or above its phase inversion temperature range:
- A) 1 part by weight of a physiologically safe liquid oil component,
- B) from about 0.1 to about 0.5 parts by weight of at least one nonionic emulsifier having an HLB value of from 11 to 15,
- C) from about 0.1 to about 0.2 parts by weight of at least one co-emulsifier selected from the group consisting of saturated fatty alcohols containing 16 to 22 carbon atoms and partial esters of polyols containing 3 to 6 carbon atoms with saturated fatty acids containing 14 to 22 carbon atoms, and
- D) from about 1 to about 6 parts by weight of water; and
- II) thickening the emulsion from Step I to the consistency of a cream by
- A) heating an aqueous solution of a water soluble polymer to a temperature of from about 30 to about 80.degree. C.,
- B) heating the emulsion formed in Step I to a temperature of from about 30 to about 80.degree. C.,
- C) mixing together the heated aqueous solution from step II A) and the heated emulsion from step II B) and homogenizing the resulting mixture with intensive stirring to produce a thickened emulsion which remains free-flowing until cooled to room temperature, and
- D) cooling the free-flowing thickened emulsion to room temperature to produce a non-flowing plastic cream with a yield point of at least about 5 Pascal.
- 2. The process of claim 1 wherein a lipophilic consistency generator is also added in step II.
- 3. The process of claim 1 wherein a lipophilic consistency generator which is the co-emulsifier set forth in step I C) of claim 1 is also added in step II.
- 4. The process of claim 1 wherein in step II D) the thickened emulsion has a yield point of from about 20 to about 50 Pascal.
- 5. The process of claim 1 wherein in step II A) the water-soluble polymer is present in the form of an aqueous solution of from about 0.005 to about 0.1 part by weight of a water-soluble polymer having a number average molecular weight in the range of from 500,000 to 5,000,000, wherein the parts by weight of water-soluble polymer are based on component I A).
- 6. The process of claim 5 wherein the water-soluble polymer is selected from the group consisting of crosslinked acrylic acid polymers or copolymers having a number average molecular weight in the range of from about 500,000 to about 5,000,000 in the form of their water-soluble salts, and at least one water-soluble, nonionic cellulose ether.
- 7. The process of claim 3 wherein in step II from about 0.01 to about 0.3 parts by weight of a co-emulsifier as set forth in step I C) is added.
- 8. The process of claim 1 wherein the nonionic emulsifier in step I B) is an adduct of 8 to 16 mols of ethylene oxide with a saturated C.sub.16-22 fatty alcohol.
- 9. The process of claim 1 wherein in step I A) the liquid oil component consists of from about 50 to 100% by weight of a hydrocarbon oil, from 0 to about 25% by weight of at least one ester of the formulae
- R.sup.1 COOR.sup.2
- R.sup.2 --OOC--R.sup.3 --COOR.sup.2
- R.sup.1 --COO--R.sup.3 --OOC--R.sup.1
- in which R.sup.1 and R.sup.2 are C.sub.1-22 alkyl groups or C.sub.8-22 alkenyl groups and R.sup.3 is a C.sub.2-16 alkylene group, and wherein the ester contains at least 10 carbon atoms, and
- from 0 to about 25% by weight of a fatty acid triglyceride of C.sub.8-22 fatty acids.
- 10. The process of claim 1 wherein the oil-in-water emulsion formed in step I A) is a microemulsion.
- 11. The process of claim 1 wherein in step I A) the liquid oil component consists of from about 50 to 100% by weight of a hydrocarbon oil, from 0 to about 25% by weight of at least one ester of the formulae
- R.sup.1 COOR.sup.2
- R.sup.2 --OOC--R.sup.3 --COOR.sup.2
- R.sup.1 --COO--R.sup.3 --OOC--R.sup.1
- in which R.sup.1 and R.sup.2 are C.sub.1-22 alkyl groups or C.sub.8-22 alkenyl groups and R.sup.3 is a C.sub.2-16 alkylene group, and wherein the ester contains at least 10 carbon atoms, and
- from 0 to about 25% by weight of a fatty acid triglyceride of C.sub.8-22 fatty acid; the nonionic emulsifier in step I B) is an adduct of 8 to 16 mols of ethylene oxide with a saturated C,6-22 fatty alcohol; and
- in step II D) the thickened emulsion has a yield point of from about 10 to about 50 Pascal.
- 12. The process of claim 2 wherein in step II the lipophilic consistency generator is selected from the group consisting of cetyl alcohol, stearyl alcohol, glycerol monostearate, and mixtures of glycerol mono- and distearate.
- 13. A process for the preparation of an oil-in-water cream comprising the steps of
- I) forming an oil-in-water emulsion by heating the following composition to a temperature within or above its phase inversion temperature range;
- A) 1 part by weight of a physiologically safe liquid oil component,
- B) from about 0.1 to about 0.5 parts by weight of at least one nonionic emulsifier having an HLB value of from 11 to 15,
- C) from about 0.5 to about 0.2 parts by weight of at least one co-emulsifier selected from the group consisting of saturated fatty alcohols containing 16 to 22 carbon atoms and partial esters of polyols containing 3 to 6 carbon atoms with saturated fatty acids containing 14 to 22 carbon atoms, and
- D) from about 1 to about 6 parts by weight of water; and
- II thickening the emulsion from step I to the consistency of a cream by
- A) heating a lipophilic consistency generator selected from the group consisting of saturated fatty alcohols containing 16 to 22 carbon atoms and partial esters of polyols containing 3 to 6 carbon atoms with saturated fatty acids containing 14 to 22 carbon atoms, to a temperature beyond its melting point,
- B) heating the emulsion from step I to about the same temperature as the heated consistency generator,
- C) intensively mixing together the heated consistency generator from step II A) and the heated emulsion from step II B), and
- D) cooling the resulting mixture to room temperature to form a non-flowing cream.
- 14. The process of claim 13 wherein in step II D) the thickened emulsion has a yield point of from about 20 to about 50 Pascal.
- 15. The process of claim 13 wherein in step II C) about 0.01 to about 0.3 parts by weight of the consistency generator is present therein.
- 16. The process of claim 13 wherein the nonionic emulsifier in step I B) is an adduct of 8 to 16 mols of ethylene oxide with a saturated C.sub.16-22 fatty alcohol.
- 17. The process of claim 13 wherein in step I A) the liquid oil component consists of
- from about 50 to 100% by weight of a hydrocarbon oil, from 0 to about 25% by weight of at least one ester of the formulae
- R.sup.1 COOR.sup.2
- R.sup.2 --OOC--R.sup.3 --COOR.sup.2
- R.sup.1 --COO--R.sup.3 --OOC--R.sup.1
- in which R.sup.1 and R.sup.2 are C.sub.1-22 alkyl groups or C.sub.8-22 alkenyl groups and R.sup.3 is a C.sub.2-16 alkylene group, and wherein the ester contains at least 10 carbon atoms, and
- from 0 to about 25% by weight of a fatty acid triglyceride of C.sub.8-22 fatty acids.
- 18. The process of claim 13 wherein in step II A) the lipophilic consistency generator is selected from the group consisting of cetyl alcohol, stearyl alcohol, glycerol monostearate, and mixtures of glycerol mono- and distearate.
- 19. The process of claim 13 wherein in step I A) the liquid oil component consists of
- from about 50 to 100% by weight of a hydrocarbon oil,
- from 0 to about 25% by weight of at least one ester of the formulae
- R.sup.1 COOR.sup.2
- R.sup.2 --OOC--R.sup.3 --COOR.sup.2
- R.sup.1 --COO--R.sup.3 --OOC--R.sup.1
- in which R.sup.1 and R.sup.2 are C.sub.1-22 alkyl groups or C.sub.8-22 alkenyl groups and R.sup.3 is a C.sub.2-16 alkylene group, and wherein the ester contains at least 10 carbon atoms, and
- from 0 to about 25% by weight of a fatty acid triglyceride of C.sub.8-22 fatty acid;
- the nonionic emulsifier in step I B) is an adduct of 8 to 16 mols of ethylene oxide with a saturated C.sub.16-22 fatty alcohol; and
- in step II D) the thickened and cooled emulsion has a yield point of from about 10 to about 50 Pascal.
- 20. The process of claim 13 wherein in step II C) from about 0.01 to about 0.3 parts by weight of the consistency generator is mixed with the emulsion.
- 21. The process of claim 13 wherein in step II A) the lipophilic consistency generator is selected from the group consisting of cetyl alcohol, stearyl alcohol, glycerol monostearate, and mixtures of glycerol mono- and distearate.
- 22. The process of claim 13 wherein the oil-in-water emulsion formed in step I A) is a microemulsion.
Priority Claims (1)
Number |
Date |
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40 10 393 |
Mar 1990 |
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CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. application Ser. No. 07/927,289, Sep. 30, 1992, now abandoned, which is a 371 of PCT/EP91/00556, filed on Mar. 21, 1991.
US Referenced Citations (3)
Foreign Referenced Citations (2)
Number |
Date |
Country |
345586 A |
Dec 1986 |
EPX |
8911907 |
Dec 1989 |
WOX |
Non-Patent Literature Citations (1)
Entry |
Jellinek, J. S. Formulation and Function of Cosmetics. 1971. Substances Which Increase the Viscosity of the Aqueous Phase. pp. 146-152. |
Continuations (1)
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927289 |
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