JPH0779931B2 - Antifoam composition and method for producing the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a defoaming agent composition suitable for solving foam troubles occurring in various steps of various manufacturing industries, and a manufacturing method thereof.

[Conventional technology and its problems]

Silicone has been well known for its excellent defoaming properties, but it is generally distributed as an O / W emulsion because it requires water dispersibility for its application. Of this silicone
O / W emulsions are not easy to manufacture and require a phase inversion method for W / O emulsions, and the product stability is not always good.

[Problems to be Solved by the Invention]

An object of the present invention is to provide an emulsifier composition that is easy to manufacture, has excellent stability, and has good defoaming power. In the present invention, by blending a saccharide into the silicone, which is an active ingredient in terms of defoaming power, a mixture of water and an emulsifier, which are the remaining ingredients, is stable in normal mechanical force and has a good O / W type. It was found that an emulsion was obtained and good defoaming performance was exhibited.

[Means for Solving the Problems]

The silicone that can be used in the present invention is not particularly limited as long as it can be used as a general defoaming agent.
The content in the composition is not particularly limited, but is substantially 5
50%.

The saccharide is not particularly limited as long as it is a water-soluble saccharide such as dextrin, lactose, sorbitol and the like. The most suitable one is sugar.

The amount of saccharide is 5 to 80%, preferably 20 to 50%.

The amount of water is not limited, but is usually 20 to 80%.

The emulsifier used in the present invention is not specified, but the usual O /
An emulsifier for W emulsification can be used. Although the amount of the emulsifier is not limited, it is usually 0.2 to 5% from the viewpoint of economy.

The present invention is characterized in that the method for preparing an emulsion for obtaining an antifoam composition is easy. That is, the desired defoaming agent composition can be obtained by mixing the composition composed of the above raw materials with a normal mechanical force.

Examples of the emulsifier include a homogenizer, a colloid mill, a homomixer, and a line mixer, but the emulsifier is not limited to these. The emulsification temperature and the emulsification time are not particularly limited.

Examples will be shown below.

〔Example〕

Example 1 40 parts of sugar was dissolved in 30 parts of warm water at 80 ° C., and 7 parts of propylene glycol, 3 parts of an emulsifier (glycerin fatty acid ester, sorbitan fatty acid ester) and 20 parts of oil compound type silicone were added to the homomixer (specialized machine). (Manufactured by Kogyo Co., Ltd.) at 10,000 rpm for 5 minutes. As a result, a composition having good stability was obtained.

Example 2 43 parts of sugar was dissolved in 30 parts of hot water at 80 ° C., and 5 parts of propylene glycol, 2 parts of an emulsifier (glycerin fatty acid ester, sucrose fatty acid ester) and 20 parts of oil compound type silicone were added to the homomixer (special machine). (Made by Chemical Industry)
At 10,000 rpm for 5 minutes. As a result, a composition having good stability was obtained.

Example 3 30 parts of sugar was dissolved in 34.7 parts of 87 ° C. warm water, and 0.3 parts of dehydroacetic acid, 3 parts of an emulsifier (glycerin fatty acid ester, sucrose fatty acid ester) and 32 parts of oil compound type silicone were added to the homomixer (special machine). 10)
The mixture was mixed at 000 rpm for 5 minutes. As a result, a composition having good stability was obtained.

Example 4 20 parts of sugar was dissolved in 46.7 parts of 75 ° C. warm water, 0.3 parts of potassium sorbate and an emulsifier (glycerin fatty acid ester,
3 parts of sucrose fatty acid ester) and 30 parts of oil compound type silicone were added, and the suspension was stirred with a propeller. A piston homogenizer (made by Izumi Food Machinery) 100 kg /
It was processed at cm ² . As a result, a composition having good stability was obtained.

Comparative Example 1 3 parts of an emulsifier (glycerin fatty acid ester, sorbitan fatty acid ester), 5 parts of propylene glycol and 30 parts of an oil compound type silicone were added to 67 parts of 80 ° C. warm water, and mixed with a homomixer (made by Tokushu Kika Kogyo) at 10,000 rpm for 5 minutes. did. As a result, aqueous layer separation was observed over time.
(In the performance test, a composition obtained by stirring and homogenizing was tested.) Comparative Example-2 Emulsifier (glycerin fatty acid ester,
Sucrose fatty acid ester) (3 parts), dehydroacetic acid (0.5 parts) and oil compound type silicone (30 parts) were added, and the suspension was stirred with a propeller. The suspension was treated with a piston homogenizer (made by Izumi Food Machinery) 100 kg / cm ² . As a result, aqueous layer separation was observed over time. (In the performance test, a composition obtained by stirring and homogenizing was tested.) Test Example 1 The above-mentioned composition was subjected to a performance test under the assumption of a sugar refining process. Ten
Into a 00 ml beaker, add 500 ml of 10% diluted test solution (PH5.2) of beet molasses (BX66 °) and add 20 ppm of the above composition.
Add and stir vigorously for 5 minutes. As a result, as shown in Table 1, the composition of the present invention showed an excellent foam suppressing effect.

Test Example 2 A performance test was conducted under the assumption of treated water at a wastewater treatment plant in accordance with the defoaming agent test standards of Tokyo. Oleic acid in a 1000 ml measuring cylinder
Take 100 ml of 0.2% Na aqueous solution and add 10% of the above composition.
1 ml of an aqueous solution was added, and air was blown into the bottom of the cylinder for 10 minutes. As a result, as shown in Table 2, the composition of the present invention showed an excellent foam suppressing effect.

[Effects of the Invention] According to the present invention, an antifoaming agent effective for solving foam troubles in various industries can be easily obtained.

Claims (2)

[Claims] 1. A defoamer composition comprising silicone as an active ingredient and comprising sugar, water and an emulsifier. 2. A method for producing an antifoam composition, which comprises emulsifying silicone, sugar, water and an emulsifier by an emulsifying machine.