Process for producing emulsifiers, and emulsified compositions

Details Process for producing emulsifiers, and emulsified compositions Process for producing emulsifiers, and emulsified compositions

1998-02-04

2000-01-18

Brouillette, D. Gabrielle

Colloid systems and wetting agents; subcombinations thereof; pro

Compositions containing a wetting agent; processes of...

The agent contains organic compound containing sulfoxy*

426654, 435277, B01F 300, A23L 1222, D21C 100

Patent

active

060158409

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a process for producing emulsifiers and to emulsified compositions obtained using the emulsifiers.


BACKGROUND ART

Emulsifiers can be largely classified into low molecular emulsifiers and high molecular emulsifiers. The low molecular emulsifiers are the so-called surfactants, and include fatty acid soaps, glycerin esters and sugar esters. High molecular emulsifiers include natural substances such as gum arabic and other rubbers and casein, as well as synthetic products such as acrylic acid salts and polyvinyl alcohols.
These emulsifiers are used in appropriate admixture depending on the purpose of use, but low molecular emulsifiers generally have the disadvantage of susceptibility to pH changes and loss of an emulsifying property as a result of changes in concentration resulting from salt addition or dilution.
Because the natural high molecular substance gum arabic must be used at a high concentration to achieve stable emulsions, while its supply volume is highly dependent on the weather conditions in the producing nation and its cost is highly variable, there has been a need in recent years for natural high molecular emulsifiers which can be provided in stable supply. On the other hand, synthetic products such as polyacrylic acid salts and polyvinyl alcohols are often limited in their uses because of problems with their emulsifying properties. An additional problem of natural high molecular emulsifiers is that they generally have high viscosity even at low concentrations, and thus their handleability is poor during the preparation of emulsions.
As mentioned above, emulsifiers employed for a variety of uses must provide emulsions which maintain a stable emulsified state over long periods, and when used in foods they must provide an appropriate taste and texture.
For example, although gum arabic is widely used as an emulsifier for emulsified aromatics, it has the problems mentioned earlier. Also, xanthan gum is widely used as an emulsifier for mayonnaise and dressings, but it gives highly viscous products and does not always provide the desired texture. In addition, casein used in creams such as coffee cream is not always satisfactory because of its high susceptibility to pH changes and the breakdown of its emulsions upon dilution.


DISCLOSURE OF THE INVENTION

As a result of diligent research in light of these facts, the present inventors have found that emulsified compositions with high emulsifying properties, storage stability, pH resistance, salt resistance and temperature resistance can be obtained by using as emulsifiers a decomposition product from the decomposition of water-soluble hemicellulose with a specific enzyme. The present invention is based upon this finding.
Specifically, the present invention provides a process, for producing emulsifiers, which comprises hydrolysis of water-soluble hemicellulose with purified rhamnogalacturonase, and emulsified compositions obtained us uch emulsifiers.


DESCRIPTION OF THE DRAWINGS

FIG. 1 is a gel chromatogram from gel filtration chromatography of a rhamnogalacturonase crude enzyme solution using GFC:TSKgel HW-50S (Super fine) (gel filtration chromatography filler, product of Toso Co.).
FIG. 2 is a chromatogram from ion-exchange chromatography of a GFC-treated rhamnogalacturonase fraction using a column of IEC:DEAE-Toyopearl 650M (negative ion-exchange chromatography filler, product of Toso Co.).
FIG. 3 is a chromatogram from ion-exchange chromatography of a DEAE-Toyopearl 650M-treated rhamnogalacturonase fraction using a column of CM-Toyopearl (positive ion-exchange chromatography filler, product of Toso Co.).
FIG. 4 is a chromatogram from affinity chromatography of AC:soybean pectin-derived rhamnogalacturonan using crosslinked rhamnogalacturonan (CLRG: Cross-Linked Rhamnogalacturonan) prepared by crosslinking.


BEST MODE FOR CARRYING OUT THE INVENTION

The water-soluble hemicellulose used as the starting material according to the invention can be of any molecular weight, but preferably has an averag

REFERENCES:
patent: 5008254 (1991-04-01), Weibel
patent: 5200215 (1993-04-01), Slade et al.
patent: 5213968 (1993-05-01), Castle et al.
patent: 5342641 (1994-08-01), Masutake et al.
patent: 5501860 (1996-03-01), Maeda et al.
patent: 5538884 (1996-07-01), Dorreich et al.
patent: 5700397 (1997-12-01), Maeda et al.

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