JP2745598B2 - Sucrose fatty acid ester composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sucrose fatty acid ester composition used as a protein solubilizing agent or for a liquid detergent, and more particularly to a carbon number of a constituent fatty acid. Is a sucrose fatty acid ester composition comprising a sucrose fatty acid ester of 8 and a sucrose fatty acid ester having a specific fatty acid and a specific average degree of substitution, and when dissolved in water, dissolves transparently and is stable The present invention relates to a sucrose fatty acid ester composition from which an aqueous solution having excellent properties can be prepared.

[Conventional technology]

Sucrose fatty acid ester (hereinafter referred to as SE) is a highly safe surfactant and is used in a wide range of fields such as food, cosmetics, pharmaceuticals, and agricultural chemicals. It is also used as a solubilizer to dissolve in water. In particular, the constituent fatty acids with 8 carbon atoms
SE is mildly acting on proteins, and is therefore used as a protein solubilizer for biological membranes or as a low foaming liquid detergent utilizing its low foaming properties. Since SE needs to be transparently dissolved in water to be used for these applications, the transparent aqueous solution is produced by temporarily dissolving under stirring at a temperature of 60 ° C. or higher and then cooling to room temperature.

Up to eight fatty acids can be ester-bonded to one molecule of sucrose, and the SE usually obtained is a mixture of those having different numbers of ester bonds. The water solubility of SE increases as the number of carbon atoms in the constituent fatty acids decreases and the average degree of substitution (the average degree of substitution refers to the average number of bonds of the fatty acid esterified to one sucrose molecule) increases.

In general, SE with 8 carbon atoms in the constituent fatty acids has an average degree of substitution.
An SE of 1.1 to 1.5 is usually used in an aqueous solution concentration range of 0.01 to 5% by weight.

[Problems to be solved by the invention]

However, the above aqueous solution becomes extremely cloudy at a concentration of 0.2 to 4% by weight, and is not practically suitable. It is considered that the cause of the white turbidity is that polyesters such as diester, triester, and octaester contained in a small amount are remarkably aggregated in water.

An object of the present invention is to provide an SE composition that is transparent when dissolved in water and has excellent stability in the obtained solution.

[Means for solving the problem]

The present invention relates to an SE having 8 carbon atoms of a constituent fatty acid, and A: a C having 10 to 14 carbon atoms of a constituent fatty acid and an average degree of substitution of 1 to 1.6.
5% by weight or more of E, or B: S having 16 to 18 carbon atoms in the constituent fatty acid and an average degree of substitution of 1 to 1.2
A sucrose fatty acid ester composition for a protein solubilizer or a liquid detergent, comprising 2% by weight or more of E, wherein the sucrose fatty acid ester composition gives a transparent solution when the composition is dissolved in water. Make the object a summary.

That is, the SE composition of the present invention has a constituent fatty acid having 8 carbon atoms.
SE, the number of carbon atoms of the constituent fatty acids is 10 to 14 and the average degree of substitution is 1 to 1
1.6 preferably SE of 1 to 1.5 or carbon number of the constituent fatty acid
The present invention relates to an SE composition comprising 16 to 18 and an average degree of substitution of 1 to 1.2, preferably 1 to 1.1.

SE having 10 to 14 and 16 to 18 carbon atoms of the constituent fatty acids of the present invention.
If the content is too small, transparency is not sufficient. Therefore, in each case, the content is 5% by weight in the case of the SE having 10 to 14 carbon atoms, based on the SE having 8 carbon atoms of the constituent fatty acid.
Or more, preferably 7% by weight or more, the carbon number of the constituent fatty acid is
For SE of 16-18, 2% by weight or more, preferably 3% by weight
It is better to mix them. Further, these constituent fatty acids may be saturated or unsaturated fatty acids, or a mixture thereof.

When dissolving the SE composition of the present invention in a system such as water, it may be heated and dissolved or dispersed in water or a part of the solvent of the target system after heating at 60 ° C. or higher, and then mixed into the system.

[Examples] Table 1 shows sucrose fatty acid esters used in Examples and Comparative Examples.

Example 1 100 g of sucrose caprylate (ryoto sugar ester CE-1695: constituent fatty acid carbon number 8, average degree of substitution 1.2)
And 7 g of sucrose capric acid ester (same as above, CT-1695, constituent fatty acid carbon number 10, average degree of substitution 1.2), and sufficiently mixed, and the sucrose fatty acid ester composition of the present invention (sucrose caprylate ester to sucrose caprylate ester) 7% by weight of sugar caprate ester)
Was manufactured.

The sucrose fatty acid ester composition prepared above was dissolved in water at 60 ° C. to prepare aqueous solutions 1 having concentrations of 0.5, 1.0 and 2.0% by weight. All prepared aqueous solutions were clear solutions and were stored at room temperature for 7 days, but none of them lost transparency.

Examples 2 to 8 In place of the sucrose caprate used in Example 1, sucrose fatty acid esters of d to g and i in Table 1 were used, and sucrose fatty acid ester composition was obtained in the same manner as in Example 1. Was manufactured. However, in Examples 6 and 8, 100 g of sucrose caprylate, 3 g of sucrose palmitate, and 3 g of sucrose stearate were mixed.

The sucrose fatty acid ester compositions prepared according to these examples were dissolved in water to prepare aqueous solutions 1 having concentrations of 0.5, 1.0 and 2.0% by weight.

The sucrose fatty acid ester composition produced by the above,
All were clear solutions and did not lose their transparency even after being stored at room temperature for 7 days.

Example 9 2.0% by weight aqueous solution of sucrose caprylate CE-1695
100 g was mixed with 7 g of a 2.0% by weight aqueous solution of sucrose caprate CT-1695 to prepare a mixed aqueous solution of sucrose caprylate and sucrose caprate.

Each of the aqueous sucrose fatty acid ester composition aqueous solutions produced as described above was a transparent solution, and did not lose its transparency even after being stored at room temperature for 7 days.

Comparative Examples 1 to 16 In place of the sucrose caprate used in Example 1, 3 or 1 g of the sucrose fatty acid ester of b to i in Table 1 was used.
In the same manner as in Example 1 to produce a sucrose fatty acid ester composition.

The sucrose fatty acid ester compositions produced according to these comparative examples were dissolved in water to produce aqueous solutions 1 having concentrations of 0.5, 1.0 and 2.0% by weight.

〔The invention's effect〕

Table 2 shows the results obtained by the above Examples and Comparative Examples.

Each of the aqueous solutions obtained in the examples was a transparent aqueous solution, and maintained stable transparency for a long period of time.

ADVANTAGE OF THE INVENTION According to this invention, the SE aqueous solution with 8 carbon atoms of the constituent fatty acid excellent in transparency stability can be easily obtained, and the SE with 8 carbon atoms of the constituent fatty acid is used as a protein solvent or a liquid detergent. It is possible to

Claims (1)

(57) [Claims] 1. A sucrose fatty acid ester having 8 carbon atoms of a constituent fatty acid, and A: 5% by weight or more of a sucrose fatty acid ester having 10 to 14 carbon atoms and an average degree of substitution of 1 to 1.6, or B: a sucrose fatty acid ester composition for a protein solubilizer or liquid detergent, comprising: 5% by weight or more of a sucrose fatty acid ester having 16 to 18 carbon atoms and an average degree of substitution of 1 to 1.2. A sucrose fatty acid ester composition which gives a clear solution when the composition is dissolved in water.