JP2001031997A - Solvent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel solvent composition which has excellent detergency and can be used in a wide range of cleaning uses. SOLUTION: A solvent composition comprises 10 to less than 35 wt.% dichloropentafluoropropane and more than 65 to 90 wt.% CF3-[O-CF (CF3)- CF2]n-(O-CF2)m-O-CF3 (wherein m is an integer of 0-6; and n is an integer of 0-6, provided that m=n=0 is excluded). The dichloropentafluoropropane is preferably 3, 3-dichloro-1,1,1,2,2-pentafluoropropane and/or 1,3-dichloro-1,1,2,2,3- penta-fluoropropane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solvent composition containing dichloropentafluoropropane and a specific perfluoropolyether in a specific ratio. This solvent composition is
It can be used as a cleaning solvent composition for cleaning solid surfaces such as plastics, metals, glasses, ceramics, and fibers.

[0002]

2. Description of the Related Art Conventionally, various degreasing cleaning, flux cleaning,
For dust cleaning and the like, 1,1-dichloro-1-fluoroethane and dichloropentafluoropropane (hereinafter, also referred to as R225), which are excellent in nonflammability, chemical and thermal stability, are used. In addition, mixed solvents having increased dissolving power by adding alcohols such as methanol and ethanol, hydrocarbons, and the like to them are also used.

In particular, R225 and mixtures thereof include metals,
Since it has the characteristics of hardly invading base materials such as plastics and elastomers and selectively dissolving various stains, it can be used for various precision machine parts and electronic parts, printed circuit boards mounted with these electronic parts, optical parts, etc. Widely used for cleaning in the field.

[0004]

R225 and its mixture have good cleaning properties and excellent drying properties, but have an effect on some plastics and rubber materials, especially on acrylic resins. Therefore, it cannot be used for cleaning parts containing these polymer materials.

An object of the present invention is to provide a solvent which does not affect these polymer materials while maintaining the detergency of R225.

[0006]

Means for Solving the Problems As a result of diligent studies, the present inventor has found that when R225 and a specific perfluoropolyether are mixed, the effect of R225 on a polymer material such as an acrylic resin while maintaining the detergency of R225 is maintained. It has been found that a solvent free of the above can be obtained.

That is, the present invention provides a composition comprising (1) dichloropentafluoropropane and (2) a perfluoropolyether represented by the following formula (1):
A solvent composition characterized in that the ratio of (2) is 10% by weight or more and less than 35% by weight / more than 65% by weight and 90% by weight or less. However, in Formula 1, m is an integer of 0 to 6, n is an integer of 0 to 6, and m = n = 0 is excluded.

[0008]

Embedded image

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The component (1) of the present invention, R2
25 means one or a mixture of two or more dichloropentafluoropropanes represented by the molecular formula C ₃ HCl ₂ F ₅ . Preferred examples of R225 include 3,3-dichloro-1,1,1,2,2-pentafluoropropane (hereinafter, also referred to as R225ca) and 1,3-dichloro-.
1,1,2,2,3-pentafluoropropane (hereinafter, referred to as
Also referred to as R225cb. ) Is at least one member selected from the group consisting of: The mixing ratio when R225 is a mixture of R225ca and R225cb is not particularly limited,
For example, the ratio of R225ca / R225cb is 1-99.
% By weight / 1 to 99% by weight, preferably 40 to 50%.
% By weight / 50-60% by weight.

In the present invention, as the perfluoropolyether represented by the formula (1) of the component (2), specific n and m
Or a mixture of a plurality of types in which n and m are different. Usually, the boiling point is 50
Those having a temperature range of -65 ° C can be preferably employed. Specifically, the product "Galde" of Audimont (Italy)
n SV 55 "(trade name) (boiling point: 56 ° C).

The solvent composition of the present invention may contain a compound other than R225 and the specific perfluoropolyether as long as the object of the present invention is not impaired.

In order to mainly control the solubility, for example, one or more of the following compounds may be used in an amount of 0.1 to 5%.
0% by weight, preferably 0.1 to 40% by weight, more preferably 0.1 to 20% by weight can be incorporated into the composition of the present invention.

N-pentane, 2-methylpentane, 2,
2-dimethylpropane, n-hexane, 3-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane, n-heptane, 2-methylhexane, 3-methylhexane, 2,3-dimethylpentane, Hydrocarbons such as 2,4-dimethylpentane, n-octane, 2,2,3-trimethylpentane, 2,2,4-trimethylpentane, cyclopentane, cyclohexane, methylcyclohexane, and ethylcyclohexane. Dichloromethane, cis-
Chlorinated hydrocarbons such as 1,2-dichloroethylene, trans-1,2-dichloroethylene, trichloroethylene, and tetrachloroethylene. Brominated hydrocarbons such as 1-bromopropane. Ketones such as acetone, methyl ethyl ketone, methyl butyl ketone and methyl isobutyl ketone;
Ethers such as diethyl ether, methyl cellosolve, tetrahydrofuran, and 1,4-dioxane;

Chlorinated fluorinated hydrocarbons such as 2,2-dichloro-1,1,1-trifluoroethane and 1,1-dichloro-1-fluoroethane. Esters such as methyl acetate, ethyl acetate, propyl acetate and butyl acetate. Alcohols such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, isobutanol and t-butanol.

In order to mainly improve the stability, for example, one or more of the following compounds are added in an amount of 0.001 to 5
It can be incorporated into the composition of the present invention in the range of weight%.

Nitro compounds such as nitromethane, nitroethane, nitropropane and nitrobenzene. Amines such as diethylamine, triethylamine, isopropylamine and n-butylamine. Phenol, o-cresol, m-cresol, p-cresol, thymol, p-
t-butylphenol, t-butylcatechol, catechol, isoeugenol, o-methoxyphenol, bisphenol A, isoamyl salicylate, benzyl salicylate, methyl salicylate, 2,6-di-t-butyl-
Phenols such as p-cresol. 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2
-(2'-hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 1,
2,3-benzotriazole, 1-[(N, N-bis-
Benzotriazoles such as 2-ethylhexyl) aminomethyl] benzotriazole.

Since the solvent composition of the present invention contains R225 and the above-mentioned specific perfluoropolyether in a specific ratio, the material of the article to be washed, for example, plastic such as soft vinyl chloride, polycarbonate, ABS resin, acrylic resin, etc. And no impact on rubbers such as nitrile rubber,
Moreover, it is excellent without flammability. Further, the solvent composition of the present invention has the same dissolving power as conventional R225, and can be used widely and suitably for various uses.

Examples of such specific applications include glass,
Cleaning agents for oil, flux, ink, dust, etc. attached to ceramics, plastics, rubber, various metal products, etc.
And a solvent for dry cleaning. In particular, it is suitable as a cleaning agent and a dust removing agent for IC parts, electric equipment, precision instruments, optical lenses, and the like. Washing methods include hand wiping,
Immersion, spraying, rocking, ultrasonic cleaning, or a combination thereof may be employed.

[0019]

EXAMPLES The present invention will be described more specifically below with reference to examples and comparative examples, but the present invention is not limited thereto. In each case, PFPE-1 as the component (2)
Is a product of Audimont (Italy) "Galden
SV 55 "(trade name) (boiling point: 56 ° C). Examples 1 to 5 and 8 to 12 are working examples, and Examples 6 to 7
Examples 13 and 14 are comparative examples.

(Examples 1 to 7) Using the solvent compositions shown in Table 1, compatibility tests with acrylic resin (X) and nitrile rubber (Y) were performed. That is, a test piece (25 mm × 30 mm × 3 mm) of each of the polymer materials X and Y was immersed in a heated and boiling solvent composition of Table 1 for 5 minutes. The test piece after immersion was visually observed, and the appearance changed (：: no change,
X: cracking or partial dissolution occurred). Table 1 shows the results. The results of the evaluation are shown in column X for compatibility with X and in column Y for compatibility with Y. In Table 1, R225
(Ca: cb) indicates a mixture of R225ca and R225cb. The number in parenthesis in the weight% column is R225.
ca: indicates the weight% of R225cb.

[0021]

[Table 1]

(Examples 8 to 14) Using the solvent compositions shown in Table 2, a cleaning test of metal working oil was performed. That is, SUS-
304 test pieces (25 mm x 30 mm x 2 mm)
Was immersed in a metal working oil A: Daphnicut AS40H (manufactured by Idemitsu Kosan Co., Ltd.), B: Daphnicut AS30D (manufactured by Idemitsu Kosan Co., Ltd.), and C: Daphnicut AS25F (manufactured by Idemitsu Kosan Co., Ltd.) to adhere the metal working oil. The test piece to which the metal working oil was attached was washed by immersing it in the solvent composition of Table 2 heated to 40 ° C. for 5 minutes. Table 2 shows the results of determination of the degree of metalworking oil removal (除去: good removal, Δ: trace remaining, ×: considerable remaining). In Table 2, R225 (ca: cb) means R225ca and R225.
2 shows a mixture of cb. Also, the number in parentheses in the weight% column is
R225ca: indicates the weight% of R225cb. The degrees of removal of the metal working oils A, B, and C are shown in Table 2, column A (metal working oil A), column B (metal working oil B), and column C (metal working oil C).

[0023]

[Table 2]

[0024]

The solvent composition according to the present invention is characterized by containing R225 and a specific perfluoropolyether in a specific ratio, has no influence on a polymer material such as an acrylic resin, and further has no influence on an oil or the like. It has the advantage of being able to be used for a wide range of cleaning applications because of its excellent solubility in soil.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 4H003 DA05 DA14 DA15 DA16 DB02 DB03 DC03 ED26 ED29 FA15 4H006 AA03 AA05 AB70 GP01 GP20 4K053 PA03 QA04 QA05 QA07 RA08 RA36 RA38 RA41 TA13

Claims (2)

[Claims] 1. A composition containing (1) dichloropentafluoropropane and (2) a perfluoropolyether represented by the following formula 1, wherein the ratio of (1) / (2) is 10% by weight or more and 35% by weight. Less than 90% by weight / less than 65% by weight / less than 90% by weight. However, in Formula 1, m is an integer of 0 to 6, n is an integer of 0 to 6, and m = n
= 0 is excluded. Embedded image 2. The method according to claim 1, wherein the dichloropentafluoropropane is 3,3.
-Dichloro-1,1,1,2,2-pentafluoropropane and / or 1,3-dichloro-1,1,2,2,3
The solvent composition according to claim 1, which is -pentafluoropropane.