JPH02202978A - Antistatic aerosol - Google Patents

Abstract

PURPOSE:To prepare an antistatic aerosol excellent in the antistatic properties, odor and drying rate by compounding a specific salt of a sulfate ester as the major component, a solvent comprising a mixture of water with ethanol and dimethyl ether as a propellant. CONSTITUTION:A compd. of the formula (wherein R is 8-18C linear or branched alkyl; R1 is 2-3C alkylene; and m is 0-10) is reacted with sulfuric acid to give a sulfate ester, which is neutralized to give an org. or inorg. salt of the ester (e.g. sodium polyoxyethylenelauryl sulfate) as the major component of an antistatic agent. 2-8wt.% said salt is dissolved or dispersed in a solvent comprising 6-45wt.% water and 25-75wt.% ethanol, and then mixed with a propellant, comprising dimethyl ether, etc., to give an antistatic aerosol esp. suitable for antistatic treatment of fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an aerosol antistatic agent having an alkyl sulfate or an alkyl ether sulfate as the main antistatic base agent, and which is particularly suitable for preventing the electrification of textiles.

[Conventional technology and its problems]

In general, fibers, hair, plastics, etc. are easily charged with static electricity due to friction in low-humidity environments, and this static electricity can cause problems such as the clinging of clothing to the body, the spark phenomenon when taking off clothes, the hair fly phenomenon of hair, and the effects of static electricity on plastics. This causes various problems such as the adhesion of floating dust. In order to prevent the generation of such static electricity, many antistatic methods have been studied for each object. Among these methods, there is currently a widespread method of dissolving or dispersing an antistatic agent in a volatile solvent such as water or ethanol, and immersing the object to be treated in this solution, or spraying or applying it directly onto the object. implemented in the field. In particular, simple antistatic agents are preferred for emergency antistatic treatment of everyday clothing and miscellaneous goods in general households, and spray-type antistatic agents, particularly aerosol antistatic agents that can spray uniform fine particles, are preferred.

Conventionally, to prevent static electricity on fibers at low humidity, they have been treated with cationic surfactants such as alkyltrimethylammonium salts, or amphoteric surfactants such as alkylbetaine and N-acylalanine, or treated with highly hygroscopic chlorides. Treatment is performed with calcium, lithium chloride, calcium sulfate, lithium sulfate, guanidine hydrochloride, etc., or a combination of these is used.

Among these, the one commonly used for general household use is an aerosol antistatic agent prepared by dissolving a cationic surfactant such as an alkyltrimethylammonium salt in ethanol or the like.

Normally, lower alcohols such as ethanol are used as a solvent in antistatic aerosols, but depending on the nature of the object being treated, these organic solvents can corrode the surface and cause problems such as deterioration and discoloration. Because of the strong pungent odor of alcohol, it was accompanied by strong discomfort when antistatic treatment was applied to textiles.

When applying antistatic treatment to objects that are easily attacked by organic solvents, or when attempting to reduce the pungent odor caused by alcohol, the most effective method is to add water to the solvent. However, some cationic surfactants such as alkyltrimethylammonium salts and amphoteric surfactants such as alkylbetaine and N-acylalanine, which are generally used as antistatic agents, do not have sufficient solubility in water. Since there was a large amount of water, contamination with water was not desirable.

Calcium chloride, lithium chloride, calcium sulfate, lithium sulfate, guanidine hydrochloride, etc. cannot be used as aerosol antistatic agents because they are corrosive to metals.

Furthermore, when water is mixed into antistatic aerosols that use trichloromonofluoromethane, dichlorodifluoromethane, dichlorotetrafluoroethane, propane, isobutane, n-butane, carbon dioxide, etc. as propellants, these propellants contain water. Since it does not have the effect of accelerating drying, the surface of the fibers to be treated feels strongly wet, making it inappropriate to mix water.

[Means to solve the problem]

As a result of intensive studies to solve the above problems, the present inventors have arrived at the aerosol antistatic agent of the present invention.

That is, the present invention comprises 2 to 8% by weight of an organic or inorganic salt of a sulfate ester compound obtained by sulfating a compound represented by the following formula (1), 25 to 75% by weight of ethanol, and 6 to 4% of water. The present invention provides an aerosol antistatic agent containing 45% by weight and using dimethyl ether as a propellant.

RO(RIO), H(1') [In the formula, R is a straight chain or branched alkyl group having 8 to 18 carbon atoms, R3 is an alkylene group having 2 or 3 carbon atoms, m
represents an integer from 0 to 10. ] Examples of the alkyl group having 8 to 18 carbon atoms for R in the general formula include octyl group, decyl group, lauryl group, myristyl group, cetyl group, stearyl group, and oleyl group.

Among these, preferred are lauryl group, myristyl group,
It is an oleyl group.

Examples of the alkylene group for R include an ethylene group and a propylene group.

m is an integer from 0 to 10.

Specific examples of compounds represented by general formula (1) include aliphatic saturated alcohols (octatool, decanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, etc.)
, or its alkylene oxide adduct (ethylene oxide adduct, propylene oxide adduct, ethylene oxide and propylene oxide combined adduct), and the like.

Organic or inorganic salts of sulfate ester compounds obtained by sulfating the compound represented by the general formula (1) have excellent solubility in both water and lower alcohols.

The effect of the alkyl sulfate or alkyl ether sulfate can be exerted by containing it preferably in an amount of 2 to 8% by weight in the aerosol content.

In the present invention, these essential components are dissolved or dispersed in these solvents in order to uniformly spray coat them onto the treated material. As an fg agent, ethanol 25-7
5% by weight and 6-45% by weight of water, preferably 10-35% by weight.
A mixture of % by weight is preferred.

Particularly preferable propellants for spraying as an aerosol are those that have the effect of promoting drying of water and that are uniformly mixed with water, lower alcohol, or a mixed solvent thereof in the aerosol container. Dimethyl ether, which does not require pre-shaking of the container, is most suitable and preferably contains 20-70% by weight in the aerosol content.

In addition to these ingredients, the present invention also contains polysiloxane derivatives to provide lubricity to the fibers, polyhydric alcohols to provide spreadability, and fragrances to provide a pleasant aroma when sprayed. can do.

〔Example〕

EXAMPLES The present invention will be described below with reference to Examples, but the present invention is not limited to these Examples.

In addition, all "parts" and "%" in the examples represent parts by weight and weight %.

1-3 and 1-9 Using several types of antistatic bases and propellants shown in the construction table,
Aerosol antistatic agents were prepared using water, alcohol, or a mixture thereof as a solvent, and their antistatic properties, drying speed, and odor strength were examined using the following test methods.

The results are shown in Table 1.

Trial 1 and End 1 (1) Antistatic property A commercially available acrylic jersey was washed 5 times using a commercially available heavy duty powder detergent to remove the fiber treatment agent that had adhered to the fabric.

The treated fabric measuring 10 x 10 cm was sprayed with antistatic aerosol at a dose of 0.2 g from a distance of 15 cm and air-dried. After this was left overnight in a temperature-controlled greenhouse at 20° C. and relative humidity of 65±2%, the surface resistance of the cloth was measured and antistatic properties were evaluated.

The surface resistance value was measured using "High Resistance Meter 4329AJ" and "Resistivity Cell 16008AJ" manufactured by Hewlett-Buckard Co., Ltd.

(2) Sensory test with odor intensity: After spraying the antistatic aerosol for 5 seconds into a box with 2d odor intensity, a panel of experts sensory-evaluated the odor of the aerosol.

The evaluation was based on the following scores.

[Review points]

0: No unpleasant odor at all.

-1: Slightly unpleasant odor.

-2...Unpleasant odor.

-3...Very unpleasant odor.

(3) Drying speed: Spray antistatic aerosol at 50% of the weight of the cloth onto the same acrylic jersey as in (1), and dry in a temperature-controlled greenhouse at 20°C and relative humidity of 65±2% for 10 minutes without wind. After drying for a minute, the weight was accurately measured using a microbalance to determine the drying rate.

Results> Table 1 shows that the aerosol antistatic agent of the present invention is excellent in antistatic properties, odor resistance, and drying speed.

Supplementary procedural device (spontaneous) 1. Indication of the case Patent Application No. 1-23145 2. Name of the invention Aerosol antistatic agent 3. Person making the amendment Relationship to the case Patent applicant (091) Kao Corporation 4 , agent

Claims (1)

[Claims] 1. An organic or inorganic salt of a sulfate ester compound obtained by sulfating a compound represented by the following general formula (I).
~8% by weight, 6-45% by weight of water, 25% by weight of ethanol
An aerosol antistatic agent containing 75% by weight and using dimethyl ether as a propellant. RO(R_1O)_mH(I) [In the formula, R is a straight chain or branched alkyl group having 8 to 18 carbon atoms, R_1 is an alkylene group having 2 or 3 carbon atoms,
m represents an integer of 0 to 10. ]