Colloid systems and wetting agents; subcombinations thereof; pro – Continuous liquid or supercritical phase: colloid systems;... – Aqueous continuous liquid phase and discontinuous phase...
Patent
1998-07-13
2000-04-25
Lovering, Richard D.
Colloid systems and wetting agents; subcombinations thereof; pro
Continuous liquid or supercritical phase: colloid systems;...
Aqueous continuous liquid phase and discontinuous phase...
516907, 426602, 426604, 554 83, 514 78, B01F 1714, A23D 700, C07F 910
Patent
active
060544945
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a phospholipid composition. More specifically, the present invention relates to a phospholipid composition capable of giving, when used as an emulsifier, an emulsion which is not easily demulsified and whose pH is not easily lowered while the emulsion is sterilized by heating.
BACKGROUND ART
Phospholipid compositions have conventionally been produced from natural phospholipid-containing substances such as egg yolks, soybeans or bacteria. Methods for producing phospholipid compositions vary depending upon the source of phospholipids to be used. For example, in the case where egg yolk is used as the source of phospholipids, the phospholipid composition is produced, in general, by extracting phospholipid components from dried egg yolk by allowing an alcohol to act on it, and then removing the alcohol from the extract. In this process, neutral lipids are removed from the above-obtained phospholipid composition ordinarily by treating it with acetone for purification, as needed.
The phospholipid composition thus obtained has widely been used as an emulsifier for producing pharmaceuticals, cosmetics, foods, and the like. In these fields, those emulsions (e.g., fat emulsions) produced by using the phospholipid composition as an emulsifier are usually put into use after subjected to heat sterilization. It is therefore necessary that the emulsions can stand heat sterilization; that is, they are required not to be demulsified easily during heat sterilization. Moreover, with respect to the lowering of the pHs of the emulsions, which is often caused while the emulsions are sterilized by heating, the degree of lowering is required to be small. However, conventional phospholipid compositions are not necessarily satisfactory from this point of view.
A primary object of the present invention is therefore to provide a novel phospholipid composition capable of giving an emulsion which is free from the aforementioned problems.
SUMMARY OF THE INVENTION
We have made extensive studies in order to attain the above object, and, as a result, finally accomplished the present invention.
The present invention provides a phospholipid composition comprising two or more phospholipids, the electric conductivity and pH of a 5 wt. % suspension of the phospholipid composition in deionized water being in the range of 130 to 220 .mu.S/cm and in the range of 6.5 to 9.5, respectively.
Further, the present invention provides a process for producing the above-described phospholipid composition, and an emulsifier comprising the phospholipid composition.
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in detail hereinbelow.
In the present invention, phospholipids include those consisting of phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, phosphatidylserine, phosphatidic acid, or sphingomyelin. Further, phospholipid compositions are compositions comprising two or more phospholipids described above, in which the phospholipid content is 20% or more and in which the remainder is mainly composed of neutral lipids.
Specific examples of such phospholipid compositions include a phospholipid composition comprising ordinarily at least 20% of phospholipids extracted from egg yolk with an organic solvent (an alcohol), or the one obtained by purifying this phospholipid composition to a phospholipid content of 80% or more; and a phospholipid composition comprising ordinarily at least 50% of phospholipids obtained by dehydrating a water-containing gummy substance obtained in the degumming step in the production process of soybean salad oil, or the one obtained by purifying this phospholipid composition to a phospholipid content of at least 80%.
The phospholipid composition of the present invention has an electric conductivity in the range of 130 to 220 .mu.S/cm and a pH in the range of 6.5 to 9.5 when measured as a 5 wt. % suspension of the phospholipid composition in deionized water. The term "deionized water" as used herein means purified water contai
REFERENCES:
patent: 4847015 (1989-07-01), Shigematsu et al.
patent: 4849137 (1989-07-01), Kobayashi
patent: 4944948 (1990-07-01), Uster et al.
patent: 5064655 (1991-11-01), Uster et al.
patent: 5153125 (1992-10-01), Kobayashi
patent: 5519159 (1996-05-01), Narabe et al.
patent: 5904945 (1999-05-01), Narabe et al.
patent: 5942639 (1999-08-01), Engel et al.
Ishikawa Noriyuki
Kobayashi Hideaki
Narabe Hitoshi
Shigematsu Yasuhiko
Tanabe Kiyoko
Lovering Richard D.
Metzmaier Daniel S.
Q. P. Corporation
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