JPH06279788A - Water-soluble resin solution composition - Google Patents

Abstract

PURPOSE:To obtain the composition which is safe and has an excellent effect of dissolving and removing contaminants by using a pyrrolidone-base organic solvent and a specified isoprene-skeleton-containing terpene compound as the essential components. CONSTITUTION:The composition is produced by mixing a pyrrolidone-base organic solvent (e.g. N-methyl-pyrrolidone) and a terpene compound, including 10C monoterpene to 15C sesquiterpene, consisting of isoprene skeletons as the smallest units as the essential components and further mixing the obtained mixture with optionally a hydrophilic surfactant (e.g. sorbitan fatty acid ester). Examples of the terpene compounds include d-limonene, l-limonene, alpha-pinene, myrcene and 2,6-dimethyloctane. This composition has an effect of speedily removing high-molecular resinous dirt, an oil stain of tar, etc., has no ignitability, causes no environmental pollution and is desirable for cleaning precision machines, etc.

Description

Detailed Description of the Invention

[0001] [Industrial field of application] The present invention relates to a mineral oil. Polymer resin material. Tar-based substance. Oily dust mixture. Fossil soot material. Contains metal oxide. It relates to a water-soluble resin-dissolved composition suitable for safely and qualitatively treating pollutants such as organic macromolecules and easily performing post-treatment without causing a problem. Specifically, it is a pyrrolidone-based organic solvent. The present invention relates to a water-soluble resin-dissolved composition in which a composition containing one kind of terpene compound as an essential component is specified. Conventionally, as a contaminant cleaning agent of this type, the following two systems have been commonly used. Instead, a terpene-based compound that is used as a natural plant-based extract from the viewpoint of safety is also receiving much attention and put on the market. One is an organic chlorine solvent (for example, trichloroethane.tetrachlorethylenetrichloroethylene.) Or a fluorine-containing fluorohalogenated hydrocarbon, commonly called a fluorine solvent. The other is toluene.xylene.hexane.acetone.paraffin. Although they are petroleum-based flammable hydrocarbons such as kerosene, both are subject to major social restrictions [prior art] as environmental, health, or dangerous substances.
As an oil-based detergent containing terpene-based limonene, for example, there is a combined use with a nonionic surfactant disclosed in JP-A-3-6300. Alternatively, what is called a water-soluble cleaner containing an orange solvent which is a commercial product is one in which D-limonene is solubilized with a surfactant and used as a cleaning agent. On the other hand, water-soluble organic solvents are used relatively often. For example, acetate ester. Dimethylformamide. Dimethyl sulfoxide. Diacetone alcohol. benzyl alcohol. Dioxane. Tetrahydrofuran.
Acetonylacetone. Examples thereof include butyric acid ester, but they have a strong aromatic odor, are difficult to disperse, and have large toxicity such as LD ₅₀ and have many uneasy factors. Not only that, but the speed of detergency. Solubility. Etc. are quite limited. [Problems to be Solved by the Invention] The present invention has succeeded in investigating such conventional cleaning agents and safely and surely solving various problems. In other words, the conventional problems are: (1) Nonflammable solvents represented by organic halogen-based substances are absolutely contaminated with groundwater. Occurrence of serious damage to human health. Destruction of atmospheric ozone. Difficulty in secondary processing, etc. (2) Most flammable petroleum-based solvents are not water-soluble and are difficult to biodegrade. It is highly flammable and is a restriction of the Fire Service Act. Or direction group system (eg xylol, toluol, etc.) is a poisonous substance. What causes a crime, and further, the dissolving power (cleansing power) is insufficient and the first purpose (cleaner) remains unsatisfied. (3) Since the water-soluble organic solvent is also hydrophilic, it has a poor ability to dissolve resins and oils. In addition to the fact that it cannot be a complete substitute from a practical point of view due to insufficient speed efficiency, secondary pollution occurs due to the transfer of contaminants. There is also a concern that it may cause a secondary disaster. (4) On the other hand, the isoprene-based terpene solvent has a strong aromaticity and a long residual scent phenomenon, which rather deteriorates the working environment. Furthermore, its dissolving power is effective to some extent for mineral oil and liquid low-molecular pollutants, but it is undeniably inferior to that of polymers (MW of 10,000 or more) represented by resins. It is clear that the surfactant does not function positively in dissolving the resin even when used in combination with the surfactant. [0003] [Means for Solving the Problems] In the present invention, attention is paid to these various conventional problems, and the following two types of aqueous solutions are used. I was able to see this solution by using a non-aqueous detergent together. That is, a pyrrolidone-based organic solvent and an isoprene skeleton (C ₅ H ₈ ) are used as a minimum unit to obtain a C 1 to C 1 monoterpene.
It has been found that a composition basically consisting of a mixed solvent containing the sesquiterpene of 5 as an essential component is optimum. It is to use a surfactant together if necessary.
As the pyrrolidone-based solvent, N-methyl-2pyrrolidone.
2-pyrrolidone. Heterocyclic aromatic solvents such as 3-pyrrolidone. The solvent has a strong resin dissolving power. Oil and fat dissolving power. It is a well-known fact that the present inventor also applied for a prior application (Japanese Patent Application No.
As described in 4-42464), since it has a large polarity, it is highly adsorbable with water (hygroscopicity) and has stability and effects on metal parts. This may cause problems such as residual moisture in a non-aqueous work process, anti-redeposition action of after-treatment and a unique off-odor (amine type), which causes discomfort. For this purpose, a fragrance is used together. Oil based on plant minerals. Combined use of corrosion inhibitors. However, there is concern that the dissolution characteristics of the pyrrolidone-based solvent may be impaired and that the chemical stability of the mixed system may change over time. On the other hand, the terpene-based solvent has a drawback that it is inferior in water-solubility, has a strong aromatic odor, and is inferior in dissolving power of polymer-based stains (resin. Vehicle. Film-shaped product. Tar. Pitch). However, by using the pyrrolidone-based solvent and the terpene-based solvent in combination, the drawbacks of each of them are alleviated, and various effects that are surprising are the gist of the present invention. The terpene-based solvent is a mono-sesquiterpene having an isoprene skeleton (C ₅ H ₈ ) as a unit and having a carbon number of C _{10 to} C ₁₅ , and a typical one is D-limonene. l-limonene. α-
Pinene. β-pinene. P Mentan. Milsen. 2,6 dimethyl octane. Can fan and so on. From now on, it has a strong aromatic odor and has been used as a plant essential oil as an external natural (plant) solvent (solvent) for perfumes (paint, paint, ink, paint building material auxiliary agent, etc.). If necessary, add surfactant or water or other organic solvent (eg hydrocarbon type for hydrophobic type, glycol type, amine type, ketone type, alcohol type for hydrophilic type). Prevention of pollution.
It is an important substance for the purpose of emulsification. For example, polyoxyethylene alkyl ether. Polyoxyethylene alkylamine. Nonionic and fatty acid salts such as polyoxyethylene polyoxypropylene ether. Alkylbenzene sulfonate. Alkyl sulfate. Alkyl phosphate. Alkyl sulfonate. Alkylnaphthalene sulfonate. Anions, etc., quaternary ammonium. Fatty acid amines.
Cations such as, betaine. Imidazoline. And so on. [Operation] In the present invention, a mixed solvent system in which a hydrophilic pyrrolidone-based solvent and a hydrophobic terpene-based solvent are combined has a resin cleaning solubility. Recontamination prevention action. Workability (comfort, speedup) is improved, and in addition to being able to be treated in a water-based atmosphere. Water quality. Contamination of various solvents to soil. It has excellent results in that it can mix water and can significantly reduce the application of dangerous substances. The field of application is cleaning of electronic parts (IC.LSI.condenser.battery.liquid crystal) paint. ink. Various vehicles. varnish. Dissolution of latex and its remover Speedy removal of heavy (vegetable oil, mineral oil) oil stains. Dry cleaning agent. Cleaning of precision machinery (fine mechanical). Mold cleaning. Cosmetic enamel, lacquer, pigment,
It can be widely and safely and efficiently used for cleaning rake, glass for dissolving and dispersing agricultural chemicals, lenses, jewelry parts such as precious metals. In addition, the expensive surface of the pyrrolidone-based solvent becomes advantageous cost when the terpene-based solvent is used in combination, which also contributes to reducing the economic burden of the alternative solvent and can be widely used with peace of mind. At the same time, the quality of water has little influence on living things including humans. Specific examples will be given below with reference to the following representative examples that are less environmentally friendly. [0005] [Practical example] A resin-dissolved composition having the following composition was manufactured as a trial and the following tests were conducted. [0006]

[Table 1] [0007]

[Table 2] (A) Carbon black, chloroform and liquid paraffin silica powder on a 5 × 5 cm plate (2 mm thick). Egg yolk oil. Apply 1.5g of the stain containing monoolein per cm ² and leave it at 20 ° C for 1 week. (B) Polyvinyl chloride. Tricresyl phosphate. Trichloroethane. The carbon black solution was added to cm ² 0.8
Apply 1-2g and leave at 30 ° C for 30 days . (A). The metal plate coated with the dirt of (b) is immersed for 1 minute (500 ml beaker) and pulled up to observe the surface condition. 40 ° at the same time for each plate
C (60% RH-70% RH) in a thermostatic chamber [0008]

[Table 3] Let stand for 48 hours and observe the surface properties. --- Observation, and at the same time, the olfactory condition was investigated --- Observation Further, C. O. D. C, O, D. (Potassium permanganate method) ↓ (10% aqueous solution) [Appearance test] [Smell test] [C, O, D: 10% aqueous solution ppm] 1. 88 2. 72 3. 34. 240. 286. 188. 122 (Test-2) Acute toxicity [LD ₅₀ (Mouse)] 1.5860 Oral mg / kg 2.7200 3.6760. 5800. 4160. 6120. 6770

[0009] [Effect of the invention] As described above, the mixed solvent of the present invention has a detergency. Degree of damage to metal, etc. Water pollution. Biosafety. The workability (smell) is superior to that of a single product, and the cost of the pyrrolidone system can be reduced (20 to 60%). Therefore, the industrial application effect is great.
Especially CFC. Organic chlorine system. Pyrrolidone. Glycol ether. Compared to flammable hydrocarbons (BTX, paraffin, pentane, hexane, etc.), the electronic industry (semiconductor, IC, transistor, circuit, LCD.
Precision industries (optical machines, NC machine tools, robots, bearings, micro gears) Dry cleaning industry. Agriculture. Dye / pigment. Emulsifier of non-aqueous substance of insect repellent. It can be used safely, reliably and comfortably as an auxiliary material for energy materials (gasoline, diesel, etc.) and household cleaners (tempura oil, shiminuki agent, grease, area stain, altered oil), etc.

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Claims (2)

[Claims] [Claim 1] A carbon number 10 comprising a pyrrolidone-based organic detergent and an isoprene skeleton (C ₅ H ₈ ) as a minimum unit.
A water-soluble resin-dissolving composition, characterized in that the monoterpene of 1 to sesquiterpene having 15 carbon atoms is an essential component [Claim 2] A pyrrolidone-based organic detergent and an isoprene skeleton (C ₅ H ₈ ) having 10 carbon atoms as a minimum unit.
2. The water-soluble resin-dissolving composition according to the first item, wherein the monoterpene to sesquiterpene having 15 carbon atoms is contained as an essential component and a hydrophilic surfactant is contained therein.