JPS5823964A - Method of preventing or eliminating emulsification of dry cleaning solvent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for preventing or eliminating emulsification of a dry cleaning solvent, which is characterized by bringing a dry cleaning solvent into contact with a super absorbent hydrogel and causing excess water from the solvent to be absorbed by the super absorbent hydrogel. The goal is to provide a way to do so.

Dry cleaning is a washing method widely used around the world.

This method uses a solution of a surfactant and a small amount of water solubilized in an organic solvent such as perculane or mineral turpentine oil to remove stains from laundry. To remove water-soluble stains from laundry, the solvent must contain water. However, that water must be solubilized in an organic solvent, and if too much water enters and emulsifies the dry cleaning solvent during washing, water-soluble dirt will remain on the laundry as a stain, causing trouble. Become. Currently, dry cleaners rely on experience and intuition to add just enough water to the dry cleaning solvent to make it soluble. but.

Sometimes problems like the ones mentioned above occur. At that time, cotton cloths, blankets, etc. are placed in a washing machine and water is used exclusively to attract mosquitoes to dissolve the emulsification, which is large-scale and troublesome, and cleanup is also complicated. There was a need for a method to easily eliminate emulsification and a method to prevent emulsification.

The present inventors have intensively investigated the method of emulsification of dry cleaning solvents using a highly water-insoluble superabsorbent hydrogel or a composite consisting of a water-insoluble high-grade aqueous hydrogel and a water-insoluble base material in an extremely easy manner. We discovered that this can be prevented or eliminated and completed this J1 horse.

That is, one aspect of the present invention is to contact or mix a dry cleaning solvent and a water-insoluble superabsorbent hydrogel or a composite consisting of a superabsorbent hydrogel and a water-insoluble base material in a dry cleaning apparatus to form a dry cleaning solvent. The present invention provides a method for preventing or eliminating emulsification by absorbing excess water from a superabsorbent hydrogel. Super absorbent hydrogel absorbs water quickly and in large quantities when it comes into contact with water, and is therefore preferably used in the present invention.

For example, as shown in Figure 1, a water absorption tank is provided in the middle of the solvent flow path of a dry cleaning device, and a high-stage aqueous hydrogel or a composite of a superabsorbent hydrogel and a water-insoluble base material is added to the water absorption tank. Emulsification can be prevented or eliminated by circulating the dry cleaning solvent in the dry cleaning apparatus while stirring. Attach a stirring rod with blades to the water absorption tank and attach a wire mesh in a cylindrical shape to prevent the hydrogel from coming out of the water absorption tank and to prevent the hydrogel from clogging the wire mesh0.
A viewing window was installed to observe the amount of water absorbed by the hydrogel, and a valve was installed to allow the hydrogel to escape from the bottom of the water absorption tank after use. A composite of heptadrogel and a water-insoluble base material is added to the trap, and the dry cleaning solvent is circulated in the dry cleaning equipment.
can also prevent or eliminate emulsification.

The water-insoluble superabsorbent hydrogel used in the present invention may be of any material as long as it absorbs water and swells to 1 to 2 times its original size, but does not dissolve in water. Chemicals (US-Patents &
4mB, 9'1l) = 4-reacrylonitrile saponide (
JP@1s-804911)% vinyl ester-ethylenically unsaturated carboxylic acid copolymer saponified product C
2γ4b6) or l-lyethylene oxide, polyvinyl alcohol, polyvinylpyrrolidone.

Sodium polyacrylate, polyacrylamide.

polyacrylic acid soda l lyacrylamide copolymer,
Examples include crosslinked products such as carboxymethyl cellulose, dextran, and pullulan.

In particular, highly water-absorbent hydrogels mainly composed of polyacrylic acid and chlorine, vinyl esters, and ethylenically unsaturated carboxylic acids or soop conductors, whose main components are X: (Y + Z) = O :1GQ ~15
: 85, Y: Z-20: 80 to 80: 20 S4 range (D) A water-staining super absorbent hydrogel mainly composed of a saponified product of a copolymer composed of a ratio of 1: .

It is suitably used in the present invention because it has extremely excellent properties such as gel strength and gel stability in the water-absorbing state.

Further, the water-insoluble base material used in the present invention is not particularly limited, and may be any material such as paper, cotton, fiber, wood, cloth, and synthetic resin. However, materials more preferably used in the present invention include pulp, nonwoven fabrics made of fibers such as polypropylene, polyester, and rayon, foam products, and paper. Furthermore, there are no particular limitations on the method for producing a composite consisting of a superabsorbent hydrogel and a water-insoluble base material, and known methods can be used. There are no particular restrictions on the use of highly water-absorbent hydrogels for insoluble substrates in composites that are mixed as is.

Usually, the amount is 0.01 to 400 parts by weight per 1ζ of 106 parts by weight of the insoluble base material. Preferably, the overlapping portion is 0.1 to goo.

Although there is no particular restriction on the amount of hydrogel or a composite consisting of a hydrogel and a water-insoluble base material used to prevent or eliminate emulsification of dry cleaning solvents, it is preferable to use an amount of hydrogel to emulsify the dry cleaning solvent. The weight of the solvent is 11 to sO.

More preferably, the thickness is 0.1 to 0.0 weight.

As mentioned above, when dry cleaning solvent emulsifies, using super absorbent hydrogel can quickly and easily remove the
A substance that prevents or eliminates emulsification of dry cleaning solvents is produced.

The present invention will be described in detail below with reference to Examples, but the present invention is not limited thereto.

Reference fIIl To 60 parts of vinyl acetate and 40 parts of methyl acrylate, add 0.6 part of Pency J Repe Reoxide as a polymerization initiator, and use this as a dispersion stabilizer to add 0.2 part of partially saponified polyvinyl alcohol and 8 parts of common salt. The mixture was dispersed in 200 parts of water, and suspension polymerization was carried out at 60° C. for 6 hours. After polymerization, it is filtered, washed with water, and dried under reduced pressure. Dried copolymer 8.6
1 part was suspended in a saponification solution consisting of 200 parts of methanol, 10 parts of water, and 40 parts of 1 solution of 5N sodium hydroxide, and after carrying out a saponification reaction in the dark at 25°C,
The temperature was raised to 0.degree. C., and the saponification reaction started at 6 o'clock. After the saponification reaction was completed, the mixture was thoroughly washed with methanol and dried under reduced pressure to obtain a hydrogel. Its water absorption rate is '1601/Iteh.

Reference Example: 181 parts of water was charged in a rich polymerization tank and 44 parts of sodium hydroxide was added.
7 parts were added and dissolved while stirring. While cooling with water, 100 parts of acrylic acid was gradually added, and the mixture was neutralized for 8 hours while stirring. Add 0.0677 parts of potassium persulfate and 0.01 parts of N-methylenebisacrylamide.

Further, 6 parts of sorbitan monostearate and 470 parts of n-hexane were added and polymerized at 60° C. for 8 hours with stirring. After completion of the polymerization, solid-liquid separation was performed and dried under reduced pressure to obtain a dry hydrogel powder. The water absorption rate of the obtained hydrogel was 86,017 g.

Example 1 In the dry cleaning apparatus shown in the schematic diagram of FIG. 1, which was equipped with a suction water tank with an internal volume of 60 L shown in the schematic diagram of FIG. ! A noodle surfactant (manufactured by Sunstar Co., Ltd., trade name 21-PLITE P) was added, and the noodles were washed and sieved in a Kinore jar moistened with dirty water.

During washing, the solvent turned into an emulsion and became cloudy, so reference example 1
When hydrogel 5 synthesized in step 4 was placed in a water absorption tank and the solvent was circulated through a dry cleaning device while stirring, the cloudiness disappeared in 6 minutes.

Practical Example 2 The same procedure as in Example 1 was carried out except that instead of #4 in the hydrogel 5 synthesized in Reference Example 1, # was placed in the hydrogel 6 synthesized in Reference Example 2 in the water absorption tank. The cloudiness disappeared in 4 minutes.

Reference Example 8 Defined valve obtained by immersing 10 parts of Kraft valve in too many parts of water, sufficiently beating it in a mixer, and filtering it through an 80-mesh wire mesh, 6 parts of hydrogel obtained in Reference Example 1, and a synthetic valve. (Mitsui-Zeraback 8WIE-79
A hydrogel-filled paper was obtained by adding 7 parts of 0) to 806 parts of methanol, mixing, paper-making through an 80-mesh wire mesh, and drying in a hot-air oven maintained at a concentration of 110°C.

Example 8 The same procedure as in Example 1 was repeated except that instead of hydrogel 8 synthesized in Reference Example 1, one noodle of hydrogel-filled paper synthesized in Reference #10 was placed in the water absorption tank. Cloudy is 6
It disappeared in minutes.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a dry cleaning device in which a water absorption tank is installed. No.! The figure is a schematic diagram of a water absorption tank. A stirring rod with one blade is attached, and a wire mesh is placed in the cylindrical shape to prevent the hydrogel from coming out of the tank and to prevent the hydrogel from clogging. hand. A valve is attached to the bottom.

Claims (1)

[Claims] ■ A method for preventing or eliminating emulsification of a dry cleaning solvent, which is characterized by using a highly absorbent hydrogel. ■ A water absorption tank is installed in the middle of the solvent flow path of the dry cleaning equipment, and a super absorbent and drogel or a composite of a super absorbent hydrogel and a water-insoluble base material is placed in the water absorption tank, and then the dry cleaning solvent is filled with water. A method for preventing or eliminating emulsification of the solvent according to claim 1, characterized in that excess water of the solvent is absorbed by a hydrogel. ■ Patent claim 1111111, characterized in that a composite of a highly water-absorbent hydrogel and a water-insoluble base material is placed in a button trap of a dry cleaning device to cause the hydrogel to absorb excess water in the dry cleaning solvent. An ink method for preventing or eliminating emulsification of the solvent. ■ Attach a stirring rod with one blade to the water absorption tank.To prevent the hydrogel from coming out of the water absorption tank, and to prevent the hydrogel from clogging the wire mesh, attach a wire mesh to the cylindrical shape, attach a peephole, and A valve is attached to the ink I.
A method for preventing or eliminating emulsification of a dry cleaning solvent according to claim 3. ■ Highly absorbent and drogel is mainly composed of ethylene mountain, vinyl ester m, and ethylenically unsaturated carboxylic acid or its derivatives. : (Y+Z)wo:to
o ~15:81iY:Z ,,, bulk・:sI・
~116:! 6 methods for preventing or eliminating emulsification of the dry cleaning solvent according to claim 1, which is a saponified product of a copolymer having a molar ratio in the range of 0. 2. The method for preventing or eliminating emulsification of a dry cleaning solvent as set forth in claim 1, wherein the super absorbent hydrogel is mainly composed of acrylic acid and/or acrylate crosslinked polymers.