JPH01139104A - Solvent for removing adhered water - Google Patents

Abstract

PURPOSE:To obtain new solvent for removing adhered water on the material such as lens and parts, by incorporating one kind among 1,1-dichloro-2,2,2- trifluoroethane and 1,2-dichloro-1,1-difluoroethane, and azeotropic compsn. with 1,1-dichloro-1-fluoroethan. CONSTITUTION:The solvent for removing adhered water is obtd. by incorporating one kind among 1,1-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1,1- difluoroethane, and azeotropic compsn. with 1,1-dichloro-1-fluoroethane as an effective component. The solvent for removing adhered water contains at least one kind among org. solvent such as hydrocarbons, alcohols, ketones or chlorinated hydrocarbons, or surface active agent, for increasing the effect removing adhered water. The solvent for removing adhered water can remove the water adhered to assembling parts consisting of metal, plastic, elastomer, etc., without exerting an adverse influence in the same manner as R113.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a solvent for removing water adhered to lenses, liquid crystal display device parts, electronic parts, precision mechanical parts, etc.

[Prior Art] After washing liquid crystal display device parts, electronic parts, and precision machinery parts caps with water, they often cannot be used as products if water remains attached to them. Therefore, water is usually removed using organic solvents.As the organic solvent, 1.1.2-1-lichloro1.2.2-trifluoroethane has various advantages as listed below. (hereinafter referred to as old 13) is widely used.

R113 is nonflammable, non-exposed, has low J properties, and has excellent stability. Moreover, adhering water can be removed without damaging base materials such as metals, plastics, and elastomers. In general, many of the objects to be treated from which attached water is removed are composite parts made of metal, plastic, elastomer, etc. Therefore, R113 was advantageous from this point as well.

[Problems to be Solved by the Invention] Despite the conventionally used old 13 having various advantages, the present invention destroys ozone in the stratosphere and eventually causes the occurrence of skin h'=1 cancer. Since there is a suspicion that this may be a cause, the object of this invention is to provide a new solvent for removing adhered water that can remove water in the same way as R113.

[Means for solving the problems] The present invention has been made to achieve the above-mentioned objects,
1.1-dichloro-2,2,2-trifluoroethane (
(hereinafter referred to as R123) or 1,2-dichloro-1,1-
One type of difluoroethane (hereinafter referred to as RI32b) and one
．． 1-dichloro-1-fluoroethane (hereinafter referred to as R141b)
The purpose of the present invention is to provide a solvent for removing adhered water, which contains an azeotropic composition with (referred to as ) as an active ingredient.

R123/ which is the active ingredient of the solvent for removing adhered water of the present invention
R141b = azeotropic composition of about 67733 or R132b
The azeotropic composition of /R141b/approximately 15.5/84.5 (azeotropic side ratio by weight) is similar to conventional R113, such as being able to remove adhered water without attacking the object to be treated. It is an excellent solvent with many advantages. These two types of azeotropic compositions can be used individually or as a mixture thereof.

The solvent for removing adhered water of the present invention can contain various other components depending on various purposes. For example, in order to enhance the water removal effect, at least one solvent selected from hydrocarbons, alcohols, ketones, or chlorinated hydrocarbons or surfactants may be included. The content of these 1° mechanical solvents in the solvent for removing adhered water is 0 to 50% by weight, preferably 10 to 40% by width, and more preferably 20 to 30% by weight.The present invention When an azeotropic composition exists in the mixture of the azeotropic composition and the organic solvent, it is preferable to use the azeotropic composition.

The 341 ratio of the surfactant in the solvent for removing adhered water is 0 to 341.
l oia rit %, better <t; tO, l ~
5!1TfQ%, more preferably 0.2~) City ri
It is 1%.

The hydrocarbons are preferably linear or cyclic saturated or unsaturated hydrocarbons having 1 to 15 carbon atoms, such as n-pentane, isopentane, n-hexane, isohexane, 2-methylpentane, 2,2-dimethylbutane, 2.3-dimethylbutane, n-hebutane, isoheptane, 3-methylhexane, 2,4-dimethylpentane, n-octane, 2-
Methylhebutane, 3-methylhebutane, 4-methylhebutane, 2.2-dimethylhexane, 2.5-dimethylhexane, 3.3-dimethylhexane, 2-methyl-
3-ethylpentane, 3-methyl-3-ethylpentane.

2,3.3-trimethylpentane, 2.3.4-trimethylpentane, 2.2.3-) dimethylpentane, isooctane, nonane, 2.2.5-trimethylhexane, decane, dodencane, 1-pentene, 2 -Pentene, 1-hexene, tooctene, l-nonene, l-decene, cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane.

It is selected from ethylcyclohexane, bicyclohexane, cyclohexene, a-pinene, dipentene, decalin, tetralin, amidino, amylnaphthalene, and the like. More preferably n-pentane, n-hexane, n
- Hebtern et al.

The alcohols are preferably linear or cyclic saturated or unsaturated alcohols having 1 to 17 carbon atoms, such as methanol, ethanol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, isobutyl alcohol, LcrL-butyl alcohol, pentyl alcohol, 5QC-amyl alcohol, 1-ethyl-1-propatol, 2-methyl-1
-Butanol, isopentyl alcohol, LerL-pentyl alcohol, 3-methyl-2-butanol, neopentyl alcohol, 1-hexanol, 2-nonal-1-pentanol, 4-methyl-2-pentanol, 2
-ethyl-1-butanol, l-heptatool, 2-heptatool, 3-heptatool, 1-octanol, 2
-octanol, 2-ethyl-1-hexanol, 1-
Nonanol, 3,5.5-trimethyl-1-hexanol, 1-decanol, 1-undecanol, l-dodecanol, allyl alcohol, propargyl alcohol,
Benzyl alcohol, cyclohexanol, 1-methylcyclohexanol, 2-methylcyclohexanol,
3-methylcyclohexanol, 4-methylcyclohexanol, α-terpineol, avinitinol, 2.
It is selected from 6-dimethyl-4-heptatool, trimethylnonyl alcohol, tetradecyl alcohol, heptadecyl alcohol, and the like. More preferred are methanol, ethanol, isopropyl alcohol and the like.

Ketones include R-CO-R', R-CD, R-
GO-R'-rco 7c1121 CD-R'', R-CO-R'', R-CO-R' (where R, R', R'' are saturated or unsaturated carbonized carbon atoms of 1 to 9) Those represented by any of the general formulas (hydrogen group) are preferred, such as acetone, methyl ethyl ketone, 2-pentanone, 3-pentanone, 2-hexanone, methyl rope tyl ketone, methyl butyl ketone, 2-heptanone, 4-
Heptanone, diisobutyl ketone, acetonylacetone, mesityl oxide, holone, methyl-〇-amyl ketone, ethyl butyl ketone, methylhexyl ketone, cyclohexanone, methylcyclohexanone, isophorone,
It is selected from 2.4-pentanedione, diacetone alcohol, acetophenone, and Feng Chong Kasa.

More preferred are acetone and methyl ethyl ketone.

The chlorinated hydrocarbons are preferably saturated or unsaturated chlorinated hydrocarbons having 1 to 2 carbon atoms, such as methylene chloride, carbon tetrachloride, 1.1-dichloroethane, 1.2-dichloroethane, 1. ll-dichloroethane, 1,1.
2-1-dichloroethane, 1,1.1.2-tetrachloroethane, 1,1,2.2-tetrachloroethane, pentachloroethane, 1.1-dichloroethylene, 1.2-
It is selected from dichloroethylene, trichlorethylene, ketone chlorethylene, etc. More preferably methylene chloride, 1, 1. i Trichloroethane, trichlorethylene, ketone chlorethylene, etc.

The surfactant can be selected from various commonly used surfactants for removing adhered water, but preferably polyoxyethylene alkyl ether, polyoxyethylene polyoxybrobylene alkyl ether, polyoxyethylene alkyl ester, Polyoxyethylene polyoxybrobylene alkyl ester, polyoxyethylene alkylphenol, polyoxyethylene polyoxybrobylene alkylphenol, polyoxyethylene sorbitan ester, polyoxyethylene polyoxybrobylene sorbitan ester, caprylic acid caprylic acid, polyoxyethylene alkylamide, etc. There are some to choose from. More preferred are caprylamine caprylate and polyoxyethylene alkylamide.

As a method for removing adhered water using the solvent for removing adhered water of the present invention, a method using a spray, a shower method, an immersion method using a cold bath, a hot bath, a steam bath, or an ultrasonic bath, or an immersion method using a combination of these baths may be adopted. Can be done.

[Examples] Examples 1 to 7 Removal of attached water 13f using the solvent for removing adhered water shown in Table 1 below (test result was 1-1).

After immersing a 30 mm x 18 mm x 5 mm thick glass plate in pure water, immerse it in a solvent for water removal (Appendix 71) for 20 seconds, drain the water, and remove the glass plate into anhydrous methanol. The removal status of adhering water was investigated from the increase in water content h1 by s'(L/).The results are shown in Table 1.

Table 1 () shows the mixing ratio [wt%] O: Can be removed well △: A small amount remains ×: Quite a bit remains [Effects of the Invention] As is clear from the examples, the solvent for removing adhering water of the present invention does not remove adhering water. It has an excellent water removal effect.

Also, like the conventionally used R113, it has little effect on attacking metals, plastics, elastomers, etc., so it is possible to remove adhering water without adversely affecting the drainage of these composite parts.

Claims (2)

[Claims] (1) Azeotropic composition of one type of 1,1-dichloro-2,2,2-trifluoroethane or 1,2-dichloro-1,1-difluoroethane and 1,1-dichloro-1-fluoroethane A solvent for removing adhered water containing as an active ingredient. (2) Claim 1, wherein the solvent for removing adhered water contains at least one selected from hydrocarbons, alcohols, ketones, chlorinated hydrocarbons, and surfactants. Solvent for removing adhered water.