TW510920B - A method for washing parts - Google Patents

Abstract

The present invention provides a method for washing for the purpose of removing an object which should be removed from an article which is washed. The object which should be removed is selected from the group consisting of a solder flux and a hot-melt adhesive. This washing method comprises a step of washing the article with washing liquid which substantially consists of particular glycol ether component and particular paraffin-type hydrocarbon component.

Description

510920 A 7 _ B7 V. Description of the invention (1) The present invention relates to a cleaning method for cleaning and removing a hot-melt adhesive used for welding aids, honing, and grinding processes attached to various machines and parts. . Welding aids (flux) are attached to various machines and parts (such as printed circuit boards) after the soldering process. These adhered welding aids must be removed after welding. In addition, when honing or grinding various parts, a method is adopted in which the part is fixed to the jig with an adhesive, and the adhesive is removed after processing to remove the part from the jig. Adhesives used to fix this part are generally hot-melt adhesives whose main component has a softening point near 70 ° C, such as rosin ester resin or terpene phenol resin. In the past, chlorofluorocarbons commonly known as $ flon〃, 1,1,1,1-trichloroethane, trichloroethylene, and dichloromethane were mainly used to remove the above-mentioned welding. Flux and hot melt adhesive after honing and grinding. Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page). However, it has been determined that the above-mentioned chlorine solvents can cause environmental problems such as ozone layer damage and ground water pollution. Therefore, in recent years, there has been a tendency to reduce the use of these chlorine-containing solvents. Therefore, the demand for cleaning agents to replace these chlorine solvents is increasing. Already developed alternative detergents include alcohols, cigarettes, ethylene glycol ethers, surfactants and many other detergents. However, the above-mentioned alternative cleaners have insufficient cleaning ability for flux and / or hot-melt adhesives. Therefore, it is difficult to use these alternative cleaners as cleaners for fluxes and / or hot-melt adhesives. In addition, unlike chlorine solvents, these alternative solvents are not highly volatile, making it difficult to remove the cleaning agent attached to the object after washing. In addition, most of these alternative detergents have paper sizes that comply with Chinese National Standard (CNS) A4 specifications (210X297 mm) _510920 printed by A7 B7 of the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. 5. The description of the invention (2) When the waste liquid is treated after the washing treatment, it must be treated as a waste product. As a result, a new environmental problem arises, and the washing cost is higher than that of a chlorine-based solvent. Among the conventional alternative detergents, the 'alcohol and hydrocarbon detergents can be regenerated by distillation, and therefore it is relatively easy to suppress the generation of industrial waste. However, these cleaning agents have a problem that the cleaning ability of the flux and the hot-melt adhesive is insufficient. Conventionally, it has been known to use a detergent containing a glycol ether compound and a hydrocarbon as an alternative to a chlorine-based solvent. For example, Japanese Patent Application Laid-Open No. 3-1 4 6 5 9 7 discloses a cleaning composition containing an aliphatic hydrocarbon having 8 to 12 carbon atoms and an organic compound having a polar group. Japanese Patent Application Laid-Open No. 4 _ 3 4 1 5 9 2 and Japanese Patent Application Laid-Open No. 5 — 1 4 8 4 9 9 disclose detergents containing glycol ether compounds and hydrocarbons, but these detergents contain Essential ingredients of surfactant and quantified water. Japanese Patent Application Laid-Open No. 5-2 3 9 4 9 5 discloses a cleaning agent for a solder paste containing a predetermined boiling point hydrocarbon and a predetermined glycol ether compound. Japanese Patent Application Laid-Open No. 5-3 0 6 4 8 2 discloses hydrocarbons containing 10 to 18 carbon atoms. And a detergent composition of a combination of C 1 to C 3 alkyl ether and C 4 to C 8 alkyl ether of polyalkylene glycol. Japanese Patent Application Laid-Open No. 6 — 4 9 4 9 3 discloses a combination of detergents containing aliphatic ethylene glycol-lower alkyl ethers having 4 to 7 carbon atoms and hydrocarbons having 6 to 12 carbon atoms. Thing. However, the above-mentioned publication neither specifically mentions nor suggests the use of these detergents for hot-melt adhesives. Furthermore, the above-mentioned publication does not disclose or suggest the distillation, regeneration, and recycling of these detergents. This paper size applies Chinese National Standard (CNS) A4 specification (21〇X 297 mm) -------- ΨII (Please read the precautions on the back before filling this page) Order ------- -510920 A7 B7 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 5. Description of the invention (3) The first cleaning method of the present invention is to remove objects in a group of white soldering aids and hot-melt adhesives. The cleaning method for removing the g from the white substrate is characterized by including using a cleaning solution consisting essentially of a glycol ether component A and a chain-chain hydrocarbon component B to clean the substrate. Step 9 wherein component A is at least one selected from the following formula I and formula II R1 — 0--(CH2-CH2-〇) 2-R2 (I) CH 3 R3 — 0--(CH2-CH-0) 2- R4 (II) (wherein R 1 and R 2 are each independently methyl or ethyl R 3 and R 4 are methyl) water-soluble glycol ethers Glycol ether compounds in the group B are at least one kind of normal chain sintered hydrocarbons and iso-chain hydrocarbons which are selected from white carbon atoms 1 0 1 3. Ideal The weight ratio of the mixing ratio of the components A and B of the embodiment is AB = 50: 5 0 9 0: 1 0 〇 Other ideal embodiment of the component A is at least one kind of white diethylene glycol dimethyl ether diethylene glycol. Glycol ether compounds consisting of alcohol ethyl methyl ether and diethylene glycol diethyl ether. Component B is at least one selected from white n-undecyl > n-dodecane and isododecane Chain chain hydrocarbons 0 A more desirable embodiment of the component A is at least one kind of glycol ether compounds selected from the group consisting of white diethylene glycol dimethyl ether and dipropylene glycol dimethyl ether > B The component is Zhengguiyuan 0 Other ideal In the embodiment 9, the first method of the present invention 尙 includes the step of using water to remove the cleaning liquid adhering to the object to be washed. 0 The size of the paper is applicable to the Chinese National Standard (CNS) A4 specification (210 × 297 mm) _ Please read first. Note on the back side 510920 A7 ___B7___ V. Description of the invention (4) In other preferred embodiments, the first method of the present invention 尙 includes a step of removing the cleaning liquid adhering to the object to be cleaned. In another preferred embodiment, the first method of the present invention includes the steps of recovering the cleaning solution by distillation from the cleaning solution after dissolving and removing the object, and washing and washing with the recovered cleaning solution. Steps to the net. In a preferred embodiment, the object to be removed is a hot-melt adhesive. The second cleaning method of the present invention is a cleaning method of removing an object to be removed, which is selected from the group consisting of a flux and a hot-melt adhesive, from an object to be cleaned. The method includes substantially using a glycol ether component A and Step of washing the object to be cleaned by a washing liquid composed of a paraffinic hydrocarbon component B, and the difference between the average boiling point of the component A and the average boiling point of the component B within 76 ° C mmHg is within 10 ° C: and The step of dissolving and removing the cleaning solution from the object after washing, and distilling and recovering the cleaning solution, wherein the component A is at least one selected from the following Formula III and Formula IV 〇R5 — 〇1 (ch2 — ch2 — 〇) 2 — r6 (III) Please read the back item 1% first

R ch3 I 〇 一 (CH2 — CH — 〇)

Rl (IV) Printed by the Consumer Cooperative of the Central Bureau of Standards, Ministry of Economic Affairs (where R5 is an aliphatic group with 1 to 4 carbon atoms, R6 is hydrogen, R7 is methyl or ethyl, and R8 is hydrogen) The above-mentioned component B is at least one kind selected from the group of normal-chain hydrocarbons of normal paraffin-based hydrocarbons having 10 to 13 carbon atoms. In an ideal embodiment, the above-mentioned component A and the above-mentioned component B are mixed. The paper size is applicable to Chinese National Standard (CNS) A4 specifications (210 ×; 297 mm)-510920 printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. Description of the invention (5) The ratio is eight: 6 = 50: 50 ~ 90: 10. In another preferred embodiment, at least one of the component A is selected from the group consisting of diethylene glycol monoethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monopropyl ether, and diethylene glycol diisopropyl ether. Glycol ether compounds composed of butyl ether and dipropylene glycol monoethyl ether, and the component B is at least one selected from the group consisting of n-dodecane, n-tridecane, and isotridecane. Department of hydrocarbons. In another preferred embodiment, the second cleaning method of the present invention includes a step of removing the cleaning liquid adhering to the object to be washed using water. In another preferred embodiment, the second washing method 尙 of the present invention includes a step of washing the object to be washed with a washing liquid recovered by distillation. Therefore, the present invention has the following advantages: (1) providing a cleaning agent having a high cleaning performance to the flux and the hot-melt adhesive; (2) providing a solution having the flux and / or the hot-melt adhesive dissolved after cleaning (3) Provide a cleaning method for easily removing the cleaning solution attached to the object to be cleaned using water; and (4) Provide a drying method A cleaning method for easily removing a cleaning solution adhering to an object to be cleaned. For those skilled in the art, the above advantages and other advantages of the present invention will become clear by reading the following detailed description. The cleaning method of the present invention is a cleaning method that removes an object to be removed selected from the group consisting of a flux and a hot-melt adhesive from the object to be cleaned. A step of washing the object to be washed by a washing liquid composed of A and the paraffin-based hydrocarbon component B. This step is hereinafter referred to as a washing step. a Essentially made of component A and component B "means that the cleaning liquid, in addition to component A and component B, may contain characteristics that do not affect the characteristics of the cleaning liquid or the Chinese standard (CNS) applicable to this paper size Α4 Specification (210 × 297 mm [----- r ---- 1 —------, TΊ 丨 丨 丨 4 (Please read the notes on the back before filling out this page) 510920 Central Bureau of Standards, Ministry of Economic Affairs Printed by employees' consumer cooperatives A7 B7 V. Invention description (6) The amount of impurities. The cleaning method of the present invention can be used to remove the flux used on printed circuit boards and the like. Or the cleaning method of the present invention can also be used to remove, for example, In the honing step of ferrous iron used in magnetic recorders or the grinding step of glass components such as ultrasonic delay elements, it is used to fix fixtures and to be honed. Hot-melt adhesive for ground parts However, the cleaning method of the present invention is not limited to the above-mentioned purpose, and can be used in any other situation where the flux and / or hot-melt adhesive must be removed. The flux component that can be removed by the cleaning method of the present invention is generally made of rosin resin And active agents, the types of active agents are _ hydrogen Organic acids such as acid salts and dicarboxylic acids. The hot-melt adhesives that can be removed by the washing method of the present invention are mainly composed of rosin resin, terpene resin, terpene phenol resin, polyester resin, and paraffinic resin. Hot-melt adhesive. The cleaning step mentioned above can immerse the cleaning object attached to the object to be removed, and irradiate the ultrasonic wave or shake it if necessary. This cleaning step is usually at room temperature ~ 80 ° C , Ideally at 40 ~ 60 ° C. The washing step can be performed once, or the washing solution can be replaced repeatedly. Or the washing step can be performed by wiping the object with a cloth impregnated with the washing solution. After the washing step, if necessary, the object to be washed can be washed with water to remove the remaining washing liquid. The following step is called the washing step. The washing step can be performed by attaching the washing liquid The washing is performed by immersing in water. This washing step can be repeated several times in the same way as the washing step. After the above washing step, or after the washing step, the water or washing liquid adhering to the washed object can be dried and removed. This step is hereinafter referred to as the drying step. Except for this paper size, the Chinese National Standard (CNS) A4 specification (210 X 297 mm) is applicable. G 丨 丨 Bu—— 卜 —————— Order! — Mm, (Please read the precautions on the back before filling (This page) Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 510920 A7 ______ B7___ V. Description of the invention (7) Any means such as air drying, warm air drying, and reduced pressure drying can be used to dry. According to the method of the present invention, Differently, the washing step may be performed without a washing step, and only the drying step may be performed after the washing step is completed. According to the present invention, the washing liquid used in the washing step of dissolving and removing the object can be easily separated from the removing object by distillation, The liquid recovered and recovered and distilled is the same as the cleaning liquid used before the washing step, and can be reused in the washing step. The so-called ★ same as the washing liquid before use means that the mixing ratio of component A and component B is not substantially changed (that is, the variation is less than 5% by weight, preferably 2% by weight or less), and the removal target is not substantially mixed (That is, 5% by weight or less, and preferably 2% by weight or less). According to the present invention, water used in the washing step of dissolving the washing liquid can be easily separated from the washing liquid by distillation, and then recovered and recovered. The liquid obtained by distillation is essentially water in which the washing liquid is not dissolved (that is, mixed with 5% by weight or less, preferably 2% by weight or less), so it can be reused in the washing step. In addition, the residue after distillation is the same as the washing liquid, and can be reused in the washing step. Hereinafter, preferred embodiments of the present invention will be described. (1) Glycol ether #A used in the first cleaning method of the present invention is at least one group selected from the group consisting of water-soluble ethylene glycol compounds represented by the following formula I and formula π: R1 -〇- (Ch2-ch2-0) 2-R2 ch3

q I R3-〇 一 (CH2 —CH-O) 2 — R4 This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm j (Please read the precautions on the back before filling this page)

Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 510920 A7 B7 ___________ V. Description of the Invention (8) (where R1 and R2 are each independently methyl or ethyl, and R3 and R4 are methyl) The compound of formula I is diethylene glycol dialkyl ether with an additional mole number of 2 and oxyethylene, where R1 and R2 represent alkyl groups having 1 or 2 carbon atoms (ie, methyl or ethyl). ). The water-soluble glycol ether compounds represented by formula I include diethylene glycol methyl ether, diethylene glycol ethyl methyl ether, and diethylene glycol diethyl ether. In Formula I, a cleaning solution obtained when a glycol ether compound in which R1 or R2 is an alkyl group having 3 or more carbon atoms is poor in solubility and water-washing ability to remove an object. When the additional mole number of oxyethyl is 1 (that is, when the ethylene glycol dialkyl ether), the ignition point is close to the cleaning temperature, and the safety is low. When the added molar number of oxyethyl groups is 3 or more, the solubility to an object to be removed is poor. As will be described later, a compound in which R 1 or R 2 is a hydrogen atom, that is, a dialkyl glycol-alkyl ether can also be used in the cleaning method of the present invention. good. The compound of formula II is dipropylene glycol dimethyl ether, and the alkyl group represented by R3 and R4 in the formula is an alkyl group having 1 carbon atom (that is, methyl group). The glycol ether compounds in which R 3 or R 4 in the formula II is an alkyl group having 2 or more carbon atoms are not water-soluble, and therefore, the obtained washing liquid has extremely poor water-washability. When the additional mole number of oxypropane is 1, the ignition point is close to the cleaning temperature, and the safety is low. When the added mole number of oxypropyl group is 3 or more, the solubility to the object to be removed is poor. As described later, a compound in which R 3 or R 4 is a hydrogen atom, that is, a dialkyl glycol monoalkyl ether can also be used in the cleaning method of the present invention, but in order to remove the hot-melt adhesive, Ether is preferred. The paraffin-based hydrocarbons B used in the first cleaning method of the present invention are applicable to at least the paper size of China National Standard (CNS) A4 (210X297 mm). ΊΊ (Please read the precautions on the back before filling this page ) Order 5 21 9 ο Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs A7 ____B7_ V. Description of the invention (9) A kind of normal paraffin hydrocarbons and isoparaffin hydrocarbons selected from carbon atoms of 10 to 13 Paraffinic hydrocarbons in groups. The hydrocarbons used in the present invention are n-decane, iso-decane, iso-fluorene, iso-fluorene, n-dodecane, isododecane, n-tridecane and isotridecane. Paraffin-based hydrocarbons having less than 10 carbon atoms have large ignition points below the cleaning temperature, and are not used in large quantities in consideration of safety. Paraffin-based hydrocarbons having 14 or more carbon atoms have poor solubility in the object to be removed. The component A and the component B can be mixed in any ratio, but when a washing liquid composed of only the component A or the component B is used, the solubility to the object to be removed is poor. In order to obtain a cleaning solution that has both good solubility and water-washing properties for the object to be removed, the ideal weight ratio of component A to component B is A: B = 3 0: 7 0 to 9 0: 1 0, and more The ideal weight ratio is A: B = 5 0: 50 to 9 0: 1 0, and the most ideal weight ratio is A: B = 5 0: 5 0 to 7 0: 3 0. In general, if the component A is too much, the solubility in the object to be removed is reduced, and if the component B is too much, the water washability is reduced. Component A is at least one selected from the group consisting of diethylene glycol dimethyl ether and diethylene glycol ethyl ester. Glycol ether compounds and component B grouped by methyl ether and diethylene glycol diethyl ether are at least one kind selected from n-undecane, n-dodecane and isododecane group A hydrocarbon-based cleaning solution is preferred because of its high solubility in the object to be removed. The ideal mixing ratio of component A and component B at this time is A: B = 50: 50 to 90:10. '' Component A is at least one type of ethylene glycol compound selected from the group consisting of diethylene glycol dimethyl ether and dipropylene glycol dimethyl ether, and component B is n-decane. The paper size is applicable to Chinese national standards (CNS ) A4 specification (210 × 297 mm) π-(Please read the notes on the back before filling this page) tr Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 510920 A7 ___B7_ V. Description of the invention (10) Alkanes Detergent is ideal because of its excellent detergency and volatility. The ideal mixing ratio of component A and component B at this time is A: B = 3 0: 7 0 to 9 0: 10. When using this cleaning solution, it is possible to directly go to the drying step without washing with water after the cleaning step. In addition, this cleaning liquid can remove processing oils used in stamping and cutting, and fingerprints attached to various machines and parts. It is also a cleaning liquid for wiping due to its high volatility. Such a cleaning solution has strong detergency. When used for removing flux, the amount of ions remaining on the object to be cleaned after cleaning is very small. For example, the residual ions on the printed circuit board will affect the insulation performance, so this cleaning solution is particularly suitable for cleaning the printed circuit board. In the first cleaning method of the present invention, a dialkyl ether is selected as the component A to obtain a cleaning solution having excellent solubility in a hot-melt adhesive. Therefore, the first cleaning method of the present invention can be used for removing flux or hot-melt adhesive, and is particularly suitable for removing hot-melt adhesive. As described above, according to the present invention, it is possible to separate the cleaning solution containing no object to be removed from the cleaning solution used in the cleaning step by distillation. In the first cleaning method of the present invention, the temperature required for separating the cleaning liquid varies depending on the type of the cleaning liquid, and is about 160 to 250 ° C under normal pressure, and may be lower under reduced pressure. temperature. For example, at a pressure of 20 m m H g, the distillation temperature is approximately 60 to 110 ° C. When the water used in the washing step is separated from the washing liquid by distillation, the temperature required to separate the water is about the boiling point of water (1 '0 0 ° C) at normal pressure, and it can be distilled at a lower temperature under reduced pressure. ^ For example, at a pressure of 20 mm H g, the temperature required for distillation is approximately 3 5 ° C. It is used to separate the above-mentioned cleaning solution from the objects to be removed, or to apply this paper size to the Chinese National Standard (CNS) A4 specification (210X297 mm j-" " " -ϋ— · ϋϋ I ( Please read the precautions on the back before filling this page) Order A7 _B7_ V. Description of the invention (11) The vacuum distillation device for water separation is explosion-proof, with heating above 50 ° C, ideally heating above 10 o ° c Capacity, batch type consisting of supply pipe, bucket, evaporation tank, decompressor and condenser, or more ideally connected with washing pipe and auxiliary tank. (2) The second washing method of the present invention Component A used is at least one group selected from the group consisting of water-soluble glycol ether compounds represented by Formula III and Formula IV below. R5-0- (CH2-CH2-0) 2 * R6 ch3R7 —〇 一 (CH2 —CH —〇) 2 — R8 (III) (IV) Please read the note on the back page I (where R5 is an aliphatic group with 1 to 4 carbon atoms, R6 is hydrogen, and R7 is methyl or ethyl And R8 is hydrogen). As shown in the above formula, the compound of formula III is diethylene glycol-aliphatic ether with an additional mole number of 2 of oxyethylene. The aliphatic group represented by R 5 in III is an alkyl group having 1 to 4 carbon atoms, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, and isobutyl. Therefore, Formula III is ideal. The compound is printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs of the Ministry of Economic Affairs. Poor propyl and I elongation of diyl alcohols or alkane 5. Hydrolyzable ethers are soluble in ethyl groups. The radical 2 is the original ready-made substance A or carbon ions. The whole image I 1 is elephant ’s alcohol. For 5 to 1, go to the divisor R to divide the divisor in the divisor temperature to the two original III pair of ears. It is a carbon liquid moisturizer, and it is shown. When the net is close, the combined ether wash is attached to the chemical 7 The basic point is R alkane to base fire 3IV. I get ethyl alcohol, elongation factor, two o'clock oxygen, ear ether. The paper size is applicable to Chinese National Standard (CNS) A4 specification (210 × 297 mm j 14 Economy) Printed by the Consumer Standards Cooperative of the Ministry of Standards of the People's Republic of China 510920 A7 B7 V. Description of the Invention (12) group). The formula for R7 in Formula IV when the number of carbon atoms is 3 or more The water solubility is poor, so the washing solution obtained is poor in water rinsing, and has poor solubility in the object to be removed. When the additional mole number of oxypropyl group is 1, the ignition point is close to the cleaning temperature, and the safety is low. Oxygen When the additional molar number of propylene is 3 or more, the solubility to the object to be removed is poor. The paraffinic hydrocarbons used in the second cleaning method of the present invention are at least one selected from the group consisting of 10 to 13 carbon atoms. Group of normal paraffin hydrocarbons and isoparaffin hydrocarbons. The hydrocarbons used in the present invention are n-decane, isodecane, n-undecane, isoundecane, n-dodecane, isododecane, n-tridecane, and isotridecane. Since the ignition point of paraffinic hydrocarbons having less than 10 carbon atoms is below the cleaning temperature, the safety is low. Paraffinic hydrocarbons having 1 to 4 carbon atoms have poor solubility in the object to be removed. In the second cleaning method of the present invention, the difference between the average boiling point of the glycol ether component A at 760 m m H g and the average boiling point of the paraffinic hydrocarbon component B is within 10 ° C. The average boiling point refers to the boiling point that each component has substantially. For example, when each component is measured while heating using gas chromatography, it can be expressed by the temperature shown at the maximum peak. If the average boiling point difference of 7 6 OmmHg exceeds 10 ° C, the mixing ratio of component A and component B in the washing liquid distilled and recovered after the washing step may be inconsistent with the original mixing ratio, which is not ideal. As described above, paraffin-based hydrocarbons having a carbon number of 14 or more are not preferable as the average boiling point difference from the glycol ether component A is not more than 10 ° C, in addition to being poorly soluble in the object to be removed. Component A and component B can be used in any mixing ratio. If a cleaning liquid consisting of only component A or component B is used, the Chinese paper standard (CNS) A4 (210X297) is applied to the paper size of the object to be removed. Li j " (Please read the notes on the back before filling this page) Xu 510920 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (13) Poor solubility. In order to obtain In a cleaning solution with excellent dissolving performance and water-washing performance, the ideal weight ratio of component A and component B is A: B = 50: 50 to 90: 10. The mixing ratio is A: B = 5 0: 5 0 to 7 When 0: 3 0, the solubility to the object to be removed and the flushability with water will be better and more desirable. Generally, if the component A is too much, the solubility to the object to be removed will be reduced. If the component B is too much, the water The rinseability is reduced. A combination example of the cleaning liquid components used in the second method of the present invention is shown below. For each component B, the average boiling point difference is 10. (: Examples of component A within the range of each compound Is followed by the average boiling point. 1) Component B: n-undecane (192 ° C) Component A: diethylene glycol monomethyl ether (194 ° C), diethylene glycol monoethyl ether (202 ° C), Dipropylene glycol monomethyl ether (χ 8 8 ° C), dipropylene glycol monoethyl ether (202 ° C) (Example 2) Component B: isododecane (197 ° C) Component A: diethyl Glycol monomethyl ether (194 ° C), diethylene glycol monoethyl ether (202 ° C), dipropylene glycol monoethyl ether (202 ° C) (Example 3) Component B: n-dodecane (2 10 ° C) This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mmj (please read the notes on the back before filling this page) Gan 510920 A7 B7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Description of the invention (14) Component A: diethylene glycol monoethyl ether (202 ° C), diethylene glycol monoisopropyl ether (207 ° C), diethylene glycol monopropyl ether (216 ° C) C), diethylene glycol monoisobutyl ether (2200 ° c), dipropylene glycol monoethyl ether (2202 ° C) (Example 4) Component B: n-tridecane, (2 2 7) Component A: diethylene glycol monoisobutyl ether (220 ° C), diethylene glycol-butyl ether (23 1 ° C), the second The ideal combination of component A and component B in the net method, and its component A is at least one selected from the group consisting of diethylene glycol monoethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monopropyl ether, A combination of paraffinic hydrocarbons grouped by ethylene glycol-isobutyl ether and dipropylene glycol-ethyl ether. A more desirable combination is the combination shown in Example 8 above, that is, at least one component A is selected from diethyl Diethylene glycol monoethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol-propyl ether, diethylene glycol monoisobutyl ether, and dipropylene glycol monoethyl ether. Ingredient B is a combination of n-dodecane. Such a combination not only has high solubility in the flux and hot-melt adhesive to remove the object, but also has an ignition point above 70 ° C, and has excellent safety during cleaning. As described above, according to the present invention, it is possible to separate a cleaning solution containing no object to be removed from the cleaning solution used in the cleaning step by distillation. In the second cleaning method of the present invention, the temperature required for separating the cleaning liquid varies depending on the type of the cleaning liquid, for example, using a mixture of diethylene glycol-isobutyl ether and n-tridecane (please read the Note: Please fill in this page again.) This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210X297 mm) 17 510920 A7 B7 printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. It is approximately 230 ° C, and can be separated at approximately 120 ° C under reduced pressure. When the water used in the rinsing step is separated from the washing liquid by distillation, in the second washing method of the present invention, the temperature required for water separation is about the boiling point of water (100 ° C) at normal pressure. , Distillation can be performed at a lower temperature under reduced pressure. For example, the temperature required for distillation at a pressure of 20 m m H g / approximately 35 ° C. The vacuum distillation device used for separating the above-mentioned washing liquid from the object to be removed or separating water from the washing liquid, so as to use a reduced-reduction distillation device which is the same as the first washing step of the present invention. ideal. In the second cleaning method of the present invention, in particular, the difference between the average boiling points of the components A and B is controlled within a certain range, and when the used cleaning solution is recovered by distillation, the recovered cleaning solution and the The change in the composition of the original cleaning solution was kept to a minimum. Therefore, the second cleaning method of the present invention is particularly suitable for recovering the used cleaning solution by distillation. Examples The present invention will be specifically described below based on examples, but the present invention is not limited to these examples. Unless otherwise indicated, the numbers in the tables of the following examples represent parts by weight. The following Examples 1 to 7 and Comparative Examples 1 and 2 are Examples and Comparative Examples of the first cleaning method of the present invention. Example 1 and Comparative Example 1 The following experiments I to m were performed using a cleaning solution having a composition shown in Table 1 below. This paper size applies to Chinese National Standard (CNS) A4 specification (210x297 mm) 18 = " " '(Please read the precautions on the back of Mr before spring ^^ 4 pages), 1T 510920

7 B V. Description of the invention (/ a) Table 1 Printing of glycol ether compounds paraffinic hydrocarbons ABCDEFG abcde by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economics Example 1 Washing liquid (1) 50 50 Washing liquid ( 2) 90 10 Washing liquid (3) 35 35 30 Washing liquid (4) 20 50 30 Comparative Example 1 Washing liquid (5) 100 Washing liquid (6) 100 Washing liquid (7) 50 50 Washing liquid (8) 50 50 cleaning solution (9) 20 50 30 cleaning solution (10) 50 50 This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling in this Page) 4 Order printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 510920 A7 B7 V. Description of the invention (17) ~ ^ The glycol ether compounds A to G and the hydrocarbons a to e in Table 1 are shown below. Compound, ', n glycol ether compounds A: diethylene glycol dimethyl ether B: diethylene glycol ethyl methyl ether C: diethylene glycol diethyl ether D: dipropylene glycol dimethyl Ether E: Diethylene glycol dibutyl ether F: triethylene glycol diethyl ether G: dipropylene glycol ethyl methyl ether paraffinic hydrocarbons a: n-fluorene--bake b: isododecane c: n-dodecane d: n-tridecane e : N-tetradecane Example I (Example 1 and Comparative Example 1) 10 ferritic ferromagnetic heads (? N 0 X 5 mm, thickness / mm) for magnetic heads of video recorders, etc., with a hot-melt adhesive (main The composition is rosin and yue yue, _ made by Electronic Industry Co., Ltd., trade name · Electron wax) # 于 片 不 _Steel jigs (150x3 Omm, thickness 2mm) <. Dipping: It was immersed in each cleaning solution at 60 ° C shown in Table 1, and then irradiated with ultrasonic waves (47 kHz, 120 W), and the magnetic head was completely peeled from the jig. The paper dimensions are in accordance with Chinese national standards (匚Yang) 8 4 specifications (210 '乂 297 mm)? 〇_

{Please read the notes on the back before filling in this page J

-Order '510920 A7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs _____ B7 V. Description of Invention (1S) @ 时间. The results are shown in Table 2. The evaluation criteria of the results in the table are as follows: Evaluation criteria ◎: Peeling time is less than 3 minutes. 0: Peeling time is more than 3 minutes but less than 5 minutes. Δ: Peeling time is more than 5 minutes but less than 10 minutes. Χ: Peeling time is 10. Minutes or more Experiment II (Example 1 and Comparative Example 1) A hot-melt adhesive (main component is a polyester resin, used for glass components (10 Omin in length, 2 in width, and 3 Omm in height) for ultrasonic retardation and the like Made by Nippon Seiko Co., Ltd., trade name: Adof ix) Adhered to a piece of stainless steel jig (length 15 Omm, width 10 Omm, length 2 mm). After cutting the glass to a thickness of 1 mm, the glass was dipped in 60 as shown in Table 1. (: Each cleaning solution was irradiated with ultrasonic waves (4 7 k ζ ζ, 120 W), and the time for the glass to be completely peeled off the jig after the cutting was measured. The results are shown in Table 2. The results in the table The evaluation criteria are as follows: Evaluation criteria ◎: Peeling time is less than 5 minutes' 〇: Peeling time is more than 5 minutes but less than 10 minutes △: Peeling time is more than 10 minutes but less than 15 minutes This paper standard applies Chinese national standards (〇 奶) 8 specifications (210 '乂 297mm) 21_ (Please read the precautions on the back before filling in this page).% Clothing_ order 510920 A7 B7 V. Description of the invention (19) X: Peel time at 1 Experiment 5 min or more (Example 1 and Comparative Example 1) 10 ferromagnetic heads and a stainless steel jig, which are the same as those in Experiment I, were placed in each cleaning solution (60 ° C) shown in Table 1. Immerse for 3 minutes and irradiate with ultrasonic waves (47 kHz, 120 W) to completely separate the ferrous magnetic head from the stainless steel jig. Then, place the ferrous magnetic head and the stainless steel jig at ion exchange at room temperature. Immerse in water for 30 minutes. Then put the ferrous magnetic head and stainless steel fixture at 100 ° C The thermostatic bath was 30 minutes. After the water was completely removed, the liquid remaining in the ferrite magnetic head and the stainless steel jig was extracted with carbon tetrachloride. The extracted liquid was analyzed by infrared spectrophotometry to determine whether the cleaning liquid remained. Results It is shown in Table 2. The evaluation criteria of the results in the table are shown below. Evaluation Criteria 0: No residual washing liquid, good washability. △: Slight washing liquid residue, slightly poor washability. Consumption by employees of the Central Standards Bureau of the Ministry of Economic Affairs Printed by the cooperative (please read the precautions on the back before filling in this page) X: The cleaning solution has a lot of residues, and the washing performance is poor. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm j 9? 510920 A7 B7 V. Description of the invention (20 Table 2

Example 1 Comparative Example 1 Washing liquid (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) Experiment I ◎ ◎ ◎ △ △ △ X △ 〇Experiment II ◎ ◎ ◎ 〇 △ △ △ X △ 〇Experiment III. 〇〇〇〇〇XX △ 〇X Please read the notes on the back and fill in this page% Order

Printed by the Central Consumers ’Cooperative of the Ministry of Economic Affairs. The paper is printed in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm 23-510920). Printed by the Consumer ’s Cooperative of the Central Standards Administration of the Ministry of Economic Affairs. As shown in Example 1, the cleaning solution used in the cleaning method of the present invention has good hot-melt adhesive removal and water flushing properties. Moreover, the cleaning solution of Comparative Example 1 is not suitable for removing hot-melt adhesives as follows. Detergent (5): Made only of hydrocarbons that do not contain water-soluble glycol ethers, poor removal of hot-melt adhesives. Cleaning solution (6): Made of only water-soluble glycol ethers It is made of hydrocarbons, and the removability of hot-melt adhesives and the water-washing property are both poor. The hot-melt adhesive has poor removability and water rinsing properties. Washing solution (8): Use a glycol ether compound with an added molar number of 3 or more in the formula I for hot-melt bonding. Poor removability of the cleaning agent. Cleaning solution (9): Use hydrocarbons with carbon number 14 or more, hot-melt adhesive Poor removability. Washing solution (1 0): Glycol ether compounds with R 3 in formula II having 2 (ethyl) carbon atoms were used, and water-washing properties were poor. Example 2 A hot-melt adhesive ( Manufactured by Nippon Seiko Co., Ltd., trade name: Adofix) 1 0 parts by weight are dissolved in mixed diethylene glycol ethyl methyl ether 60 0% by weight and n-dodecane 40% by weight cleaning solution 90 0% This solution was placed under a reduced pressure of 3 OmmHg, heated to 110 ° C and distilled for 60 minutes. When the distilled liquid was analyzed by ultraviolet spectrophotometry, no paper size was found suitable for China National Standard (CNS) A4 specification (210x297 mm) 24 = (Please read the precautions on the back before filling out this page) 510920 Printed on the A7 B7 by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (22) The mixture was mixed in. When the distillate was analyzed by gas chromatography, it was confirmed that the distillate was the same as the cleaning solution in the initial mixed state. Using the distillate, the ferrite magnetic head was performed in the same manner as in Experiment I of Example 1. Peeling experiment with fixture, found all fat within 3 minutes The ferromagnetic head is separated from the jig. That is, the removal performance of the hot-melt adhesive that is the same as that of the detergent in the initial mixed state can be obtained. Example 3 A ferrous magnetic head (20) X 5 mm, thickness 1 mm) is adhered to a piece of stainless steel jig (150 × 3 Omm, thickness 2 mm) with a hot-melt adhesive (manufactured by Zong Electronics Industry Co., Ltd., trade name: E 1 ectrqnwa X). The steps shown in Table 3 peeled off the magnetic head holder. The cleaning solution used was a mixture of 70% by weight of diethylene glycol dimethyl ether and 30% by weight of isododecane. In Table 3, washing step 1 and washing step 2 are performed by changing the washing solution and washing twice. Water rinse step 1 and water rinse step 2 are performed using tap water and ion exchange water. By the steps in Table 3, the ferrite magnetic head was completely peeled from the jig, and the hot-melt adhesive was sufficiently removed. Under a reduced pressure of 2 QmmHg, the mixed solution of the washing liquid produced in the water washing step 1 and the tap water was heated to 35 ° C, and distilled under reduced pressure. Most of the obtained distillate was water, and the mixed washing liquid was 5 % By weight or less. This distillate can be reused in water rinse step 1. Most of the distillation residue is a cleaning solution, and the mixing of water is 5 wt% or less. The ratio of diethylene glycol dimethyl ether to isododecane in the distillation residue is almost the same as the original paper size applicable to China National Standard (CNS) A4 specifications (210X297 mm% _ (Please read the precautions on the back before filling (This page) 510920

7 B 3 this 6 reasons. It is said that the same shape is used to clean the re-liquid as a slag residue. (Please read the precautions on the back before filling this page.) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. (CNS) A4 specification (210X297mm)% _ 510920 Α7 B7 V. Description of invention (24) Table 3 Step temperature (° C) Time ultrasonic irradiation (minutes) (47kHz, 120W) Washing step 1 Washing liquid 60 2 With washing step 2 Wash solution 60 2 With water washing step 1 Tap water 60 2 With water washing step 2 Ion exchange water at room temperature 2 / frrT. M Drying step 1 120 10 — (Please read the precautions on the back before filling in this Page) Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs This paper is sized for the Chinese National Standard (CNS) A4 (210X297 mm j π 510920

A7 B7 V. Description of the Invention (25) Example 4 and Comparative Example 2 The following experiments I and II were performed using the cleaning solution of the composition shown in Table 4 below: ^ 11- · ϋ-ϋ ιϋι · ιϋ — «ϋϋ > ϋ In i— ϋ.— «I% (Please read the notes on the back before filling in this page) Order printed by the Central Consumers Bureau of the Ministry of Economic Affairs, printed by the consumer co-operative society The paper size applies to the Chinese National Standard (CNS) Α4 specification (210 × 297 mm j 510920 A7 B7 V. Description of the invention P sentence Printed by the Consumers' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 4 DEGD Μ DPGD Μ n-decane cleaning solution (11) 9 0 1 0 Cleaning solution (1 2) 4 0 4 0 2 0 Detergent (1 3) 3 0 3 0 4 0 Detergent (1 4) 10 1 0 8 0 Detergent (1 5) 9 0 1 0 Example Detergent (1 6) 2 0 5 0 3 0 Washing liquid (1 7) 5 0 5 0 4 Washing liquid (18). 1 0 9 0 Comparative Example 2 Washing liquid (1 9) 1 0 0 Washing liquid (2 0) 1 0 0 Washing liquid (2 1) 10 0 (Please read the precautions on the back before filling this page) This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) Guangyi 510920 A7 B7 V. Invention Explanation (27) DEGDM: Diethylene glycol dimethyl ether DPGDM: Dipropylene glycol dimethyl ether Experiment I (Example 4 and Comparative Example 2) A capacitor and a fixed resistor are mounted, and then a printed circuit board that is subjected to a soldering process (The surface area of the substrate is 5 cm2) is a test piece. The soldering process uses a rosin-based flux (flux: AGF-2 00-J 3, manufactured by Asahi Co., Ltd.). The test piece is washed with each cleaning solution shown in the table. Wash according to the steps shown in Table 5. In Table 5, washing step 1 and washing step 2 indicate that the washing solution is changed and washed twice. Each washing step is to wash 1,000 m again. The liquid was added to a 1000 m $ beaker, and the test piece was immersed in it. The frequency of the ultrasonic wave used in step 1 was 4 7 kHz and the power was 120 W. (Please read the precautions on the back before filling (This page) Printed by the Central Consumers Bureau of the Ministry of Economic Affairs, Consumer Cooperatives. This paper is printed in accordance with Chinese National Standards (milk), 8 specifications (210 乂 297 mm_), 3,510,920, A7, B7 5. Description of the invention (2 浐) Table 5 Step temperature (° C) Time (seconds) Method Washing step 1 Washing liquid 40 60 Dipping Sonic washing step 2 Cleaning liquid at normal temperature 60 Impregnation shaking drying step-80 600 warm air (please read the precautions on the back before filling this page) Order printed by the staff consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs This paper is suitable for China Standard (CNS> A4 specification (2! 0X297 mm) 510920 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Invention Description (2 $ Wash according to the steps in Table 5 and measure the residue on each test piece The ion content and the amount of resin such as rosin were used to evaluate the flux removal performance of each cleaning solution. The device used for the ion amount measurement was an ionic residue amount measurement device (Omega meter, 60 OS C type, manufactured by Alphametals). The amount of remaining resin was evaluated visually with a microscope. The results are shown in Table 6. The evaluation criteria of the results in the table are shown below. Evaluation standard residual ion ◎: Less than 5eg * NaCj? / In2 〇: 5 // g. NaCj ^ / i η2 or more, less than 10 / zg * NaCj2 / in2 △: 10 / g * NaC again / in 2 or more, 14 / zg * NaCj ^ / in2 Residual resin 〇: No residual flux △: Slight residual flux X: A large amount of residual flux Experiment Π (Example 4 and Comparative Example 2) Using a hot-melt adhesive (Zong Electronics Industry Co., Ltd.) (Made by the company, trade name: Electron wax) Adhesive 10 iron heads (20 X 5mm, thickness 1mm) used for 10 video camera heads, etc., to a piece of stainless steel fixture (150x30mm, thickness 2mm) on. Then immerse it in a 1000 mj? Beaker containing each cleaning solution (1000 m meaning) at 40 ° C in Table 4, and irradiate ultrasonic waves (47 kHz, 120 W). China National Standard (CNS) A4 specification (210X297 mm) 32-(Please read the precautions on the back before filling this page) 510920 A7 B7 V. Description of the invention (30) The time when the fixed magnetic head and the fixture are completely peeled off. The results are shown in Table 6. The evaluation criteria of the results in the table are shown below. Evaluation Criteria ◎: Peeling time is less than 3 minutes 0: Peeling time is 3 minutes or more and 5 minutes or less △: Peeling time is 5 minutes or more and 10 minutes is less than X: Peeling time is 10 minutes or more (please read the precautions on the back first) (Fill in this page)

D f -5-TT Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs This paper size applies to the Chinese National Standard (CNS) A4 (210 X 297 mm) 510920 V. Description of the invention (4 /) Table 6 A7 B7

Example 4 Comparative Example 2 (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) Experiment I Residual Ion Amount ◎ ◎ ◎ ◎ ◎ ◎ △△ △ X Residual resin 〇〇〇〇〇〇〇〇〇 △ △ X experiment π ◎ ◎ ◎ ◎ ◎ ◎ ◎ △ △ X (Please read the precautions on the back before filling out this page) Clothing--It Ministry of Economy Printed by the Central Bureau of Standards Consumer Cooperatives This paper is printed in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm) ^ 510920 A7 B7 Printed by the Central Bureau of Standards Consumer Cooperatives of the Ministry of Economy As shown in Example 4, the cleaning solution used in the cleaning method of the present invention has excellent flux removal properties and hot melt adhesive removal properties. In addition, since the cleaning liquid of Comparative Example 2 is composed of one of a glycol ether compound or a hydrocarbon, it has poor solder removal properties and hot melt adhesive removal properties. Example 5 A capacitor and a fixed resistor were mounted, and a printed circuit board (substrate surface area of 5 cm2) subjected to soldering was used as a test piece. Welding treatment system uses rosin-based flux (flux: AGF — 200 — J 3, manufactured by Asahi Corporation). This test piece was washed with a mixture of 50% by weight of dipropylene glycol dimethyl ether and 50% by weight of n-decane. Follow the procedure shown in Table 7 below. In Table 7, washing step 1 and washing step 2 indicate that the washing liquid was changed and washed twice. In each washing step, 1000 m j? Of cleaning solution was added to a 1000 m beaker, and the test piece was immersed in it. The frequency of the ultrasonic wave used in washing step 1 is 47 kHz, and the power is 120 W. After the washing step shown in Table 7, the test piece was taken out of the washing solution, and placed in a drying tank maintained at 60 ° C, and the time until no washing liquid remained on the test piece was measured. The presence or absence of the cleaning solution on the test piece was confirmed by infrared spectroscopy to observe the presence or absence of infrared peaks of a specific wavelength of the cleaning solution. As a result, the residual washing solution was completely left in the drying tank for 30 seconds, and the washing solution was sufficiently evaporated and dried. Example 6 The cloth was impregnated with 30% by weight of dipropylene glycol dimethyl ether and n-decane (please read the precautions on the back before filling this page) The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) ) -35-510920 A7 B7 printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs _ V. Description of the invention (33) In a cleaning solution composed of 70% by weight of the mixture. When the fingerprint was attached to a non-recording steel test piece (150 x 300 mm, thickness 2 mm), and then wiped with the aforementioned dip cloth, the fingerprint was completely removed. After wiping, the test piece was left at normal temperature, and the washing liquid on the test piece was evaporated within 1 minute, and no washing liquid remained. Example 7 A hot melt adhesive (manufactured by Nippon Chemical Co., Ltd., trade name: Adof ix) was dissolved in 10 parts by weight of 60% by weight of dipropylene glycol dimethyl ether and 40% by weight of n-decane. 90 parts by weight of the washing liquid. This solution 16 P was placed under a reduced pressure of 2 OmmHg and heated to 60 ° C to be distilled Θ for 0 minutes. When the liquid obtained by distillation was analyzed by ultraviolet spectrophotometry, no hot-melt adhesive was found. When the distillate was analyzed by gas chromatography, it was confirmed that the distillate was the same washing liquid as the initial mixed state. Using this distillate in the same manner as in Experiment Π of Example 4, peeling experiments of fertilized ferromagnetic heads and fixtures were performed. It was found that when all fertilized ferromagnetic heads and fixtures were peeled off within 3 minutes, all the fertilized particles were within 5 minutes. The ferromagnetic head is separated from the jig. That is, the same removability of the hot-melt adhesive as the detergent in the initial mixed state can be obtained. The following Examples 8, 9 and Comparative Examples 3 and 4 are Examples and Comparative Examples of the second cleaning method of the present invention. Example 8 and Comparative Example 3 This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) _ 3 (Please read the precautions on the back before filling this page) 510920

7 B V. Description of the invention (34) The following experiments I to m were performed using the composition shown in Table 8 below. Table 7 Step temperature (° C) Time (seconds) Method Washing step 1 Washing liquid 40 丨 60 Immersion ultrasonic cleaning step 2 Washing liquid at normal temperature 60 Immersion shaking (Please read the precautions on the back before filling this page) __ Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. The paper size is applicable to China National Standard (CNS) A4 (210X297 mm) -〇 (-510920

AB V. Description of the invention (Qi) Table 8 Printing of glycol ether compounds paraffinic hydrocarbons by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs Η IJ Κ L Μ Ν 〇fghij Example 8 Cleaning solution (22) 50 50 Washing liquid (23) 30 30 40 Washing liquid (24) 40 40 20 Washing liquid (25) 70 20 10 Washing liquid (26) 45 55 Washing liquid (27) 95 5 Comparative example 3 Washing liquid ( 28) 100 Washing liquid (29) 100 Washing liquid (30) 50 50 Washing liquid (31) 50 50 Washing liquid (32) 50 50 The paper size applies to the Chinese National Standard (CNS) A4 specification (210X 297) (Centimeters) today (please read the notes on the back before filling this page) 510920 A7 B7 V. Description of the invention (36) The glycol ether compounds Η ~ 〇 and hydrocarbons f ~ j in Table 8 are respectively The following compounds are shown. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page) Glycol ether compounds Η: Diethylene glycol monomethyl ether I: Diethylene glycol monoethyl ether J : Diethylene glycol-isopropyl ether K: Diethylene glycol monoisobutyl ether L: Diethylene glycol monobutyl ether M: Dipropylene glycol monoethyl ether N: Triethylene glycol monomethyl ether. : Dipropylene glycol monopropyl ether alkane hydrocarbons a: n-undecane b: isododecane c: n-dodecane d: n-tridecane e: n-tetradecane Experiment I (Example 8 and comparison Example 3) A capacitor and a fixed resistor are mounted, and a printed circuit board (substrate surface area 5 c πί) subjected to soldering is used as a test piece. The soldering process uses a rosin-based flux (flux: AGF — 200 — J 3, manufactured by Asahi Corporation). This test piece was washed with each washing liquid shown in 8. According to the following table 9, this paper size applies the Chinese national standard (CNS> A4 size (210X297mm) _ __ a dy 510920 A7 B7 V. Wash the steps shown in the description of the invention (37). The washing steps and water washing steps are The test piece was immersed in a 1000 mj? Flask containing 100 Omj? Washing solution or water. The frequency of the ultrasonic waves used in the washing step was 47 kΗz, and the work rate was 1 2 0 W. (Please read the notes on the back before filling out this page) The paper size printed by the Employees' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs applies to Chinese National Standards (CNS) A4 specifications (210X297 mm) One 40 _ 510920 Five, Description of invention (status) Table 9

AB step temperature (° C) time (seconds) method washing step washing liquid 60 60 dipping ultrasonic water washing step 1 tap water room temperature 60 dipping shaking water washing step 2 ion exchange water normal temperature 60 dipping shaking drying step-80 600 temperature Wind (Please read the notes on the back before filling out this page) Printed by the Central Consumers ’Cooperative of the Ministry of Economic Affairs. The paper is printed in accordance with the Chinese National Standard (CNS) A4 specification (210X297 mm 510920). Preparation A7 B7 V. Description of the invention (39) After washing according to the procedures in Table 9, after drying, measure the amount of ions remaining on each test piece and the amount of resin such as rosin, and evaluate the removal performance of each cleaning solution to the flux. Ion measurement The device used was an ionic residue amount measuring device (Omega meter, 600 SC type, manufactured by A1 Phameta 1 s Co., Ltd.). The amount of residual resin was visually evaluated with a microscope. The results are shown in Table 6. The results in the table The evaluation criteria are as follows: Evaluation criterion residual ions 0: less than 7 // g. NaCJ? / In2 △: 7 // g * NaCJ2 / in 2 or more, less than 14 / zg * NaC芡 / i η2 Residual resin 0: No residual flux △: Slight residual flux X: Excessive amount of residual flux Experiment Π (Example 8 and Comparative Example 3) Using a hot-melt adhesive (manufactured by Zong Electronics Industry Co., Ltd., Product name: Electron wax) Adhesive ferrite magnetic head (20 X 5mm, thickness 1mm) used for 10 video camera heads, etc., to a piece of non-recording steel fixture (150x30mm, thickness 2mm) Then, it was immersed in a 1000 beaker containing each cleaning solution (1000 m) at 40 ° C in Table 8, and irradiated with ultrasonic waves (47 kHz, 120 W) to measure the magnetic head and the fixture. The time for complete peeling. The results are shown in Table 10. The evaluation criteria for the results in the table are as follows. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) '' -42-(Please read the Note: Please fill in this page again) 510920 Printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of Invention (40) Evaluation Criteria ◎: Stripping time is less than 7 minutes 0: Stripping time is more than 7 minutes and less than 10 minutes Peeling time 10 minutes or more, less than 15 minutes X: Peeling time 15 minutes In the above experiment (Example 8 and Comparative Example 3), 10 ferrite magnetic heads and a piece of stainless steel jig, which are the same as those used in Experiment Ή, were immersed in each cleaning solution at 40 ° C shown in Table 8. It was then immersed in ion-exchanged water at room temperature for 30 seconds. Then, put the ferrite magnetic head and the stainless steel jig in a thermostatic bath at 100 ° C for 30 minutes. After completely removing the water, use carbon tetrachloride to remove the liquid remaining in the ferromagnetic head and the stainless steel jig. The extracted solution was analyzed by infrared spectrophotometry to determine whether or not the cleaning solution remained. The results are shown in Table 10. The evaluation criteria of the results in the table are as follows. Evaluation Criteria ○: No washing liquid remained, and water-washing property was excellent. △: A little washing liquid remained, and the water washability was slightly poor. X: There are many residual liquids, and the water-washing property is poor. This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) 1 43-(Please read the precautions on the back before filling this page)

VT 510920 A7 B7 V. Description of the invention (4 /) Table 10

Example 8 Comparative Example 3 (22) (23) (24) (25) (26) (27) (28) (29) (30) (31) (32) Experiment I Residual ion amount 〇〇〇〇 △ X 〇X △ △ Residual resin 〇〇〇〇 △ 〇X 〇X △ 〇 Experiment II ◎ ◎ ◎ 〇〇 △ 〇XX △ △ Experiment III 〇〇〇〇 △ 〇X 〇X △ X (Please read the note on the back first Please fill in this page for further details.) The Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs printed quasi-standard paper (milk milk) 8-4 size (210, 297 mm) for national and national use.-510920 Central Bureau of Standards, Ministry of Economic Affairs Printed by employee consumer cooperatives A7 B7 V. Description of the invention (42) Above 'As shown in Example 8, the cleaning solution used in the cleaning method of the present invention has excellent flux removal properties and hot melt adhesive removal properties And water washability. In contrast, the cleaning liquid of Comparative Example 3 is not suitable for removing flux and hot-melt adhesive as described below. Detergent (2 8): Made of hydrocarbons only, poor in solder removal and water washability. Washing liquid (2 9): It is only made of water-soluble ethylene glycol compounds, and the removability of the hot-melt adhesive is poor. Detergent (30): Use ethylene glycol with ethylene glycol compounds with a mole number of 3 or more, poor solder removal, hot-melt adhesive and water washability. Detergent (3 1): Use of hydrocarbons with a carbon number of 14 or more, poor solder removal, hot melt adhesive removal, and water washability. Detergent solution (32): Glycol ether compounds in which R7 in Formula VI is an aliphatic group having 3 or more carbon atoms, and the flux-removing property and the water-washing property are used. Example 9 A hot-melt adhesive (manufactured by Nippon Chemical Co., Ltd., trade name: Adofix) was dissolved in 10 parts by weight of diethylene glycol monoisobutyl ether, 70% by weight, and n-dodecane. 0% by weight of the cleaning solution is 90% by weight. This solution 16 was placed under a reduced pressure of 3 OmmHg, heated to 1 1 and distilled for 60 minutes. When analyzing the liquid obtained by distillation by UV spectrophotometry, no Chinese standard (CNS) A4 size (210X 297 mm) was found for this paper size. 45-(Please read the precautions on the back before filling this page, & gt Order-510920 A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (43) Hot melt adhesive is mixed. In addition, when the aforementioned distillate is analyzed by gas chromatography, 'confirm that the distillate is mixed with the initial The washing liquid in the same state was used to perform the peeling experiment of the ferrite magnetic head and the jig in the same manner as in Experiment I of Example 8 using the steamed liquid. That is, the same removability of the hot-melt adhesive as that of the detergent in the initial mixed state can be obtained. The mixed solution of the washing liquid and the tap water produced in the water washing step of Table 9 (washing) Liquid: Tap water == 1 5 Weight: 8 5 wt%) 1 · 6 Heat to 35 ° C, and perform distillation under reduced pressure for 60 minutes. The majority of the distilled solution is water, and the mixed washing solution is 2% by weight or less. This The distillate can be reused in water washing step 1 in Table 9. Most of the distillation residue is a washing liquid, and the water content is less than 2% by weight. Diethylene glycol-isobutyl ether and isotridecane in the distillation residue The ratio is almost the same as the original state. Therefore, this distillation residue can be reused as a washing liquid. Comparative Example 4 Under a reduced pressure of 3 OmmHg, the average boiling point of 760 mmHg will be about 2 5 ° C at 110 ° C Washing liquid composed of a mixture of diethylene glycol monoethyl ether (76 OmmHg average boiling point 2 0 ° C) 85% by weight and n-tridecane (760mmHg average boiling point 227 ° C) 15% by weight Distilled for 1 60 minutes for 60 minutes. Then, the composition of the obtained distillate was analyzed by gas chromatography. As a result, the composition was different from the initial mixed state and the composition of diethylene glycol monoethyl ether exceeded 90% by weight. Standards apply Chinese National Standard (CNS) A4 specifications (210X297 mm) ^ " -46-(Please read the precautions on the back before filling out this page) «Clothing • • -Order 510920 A7 B7 V. Description of the invention (44) Using this distillate, the method of experiment Π in Example 8 was used to peel the ferrous magnetic head and the jig. As a result, the time required for peeling exceeds 10 minutes. As described above, according to the present invention, a cleaning method with high detergency for solder and / or hot-melt adhesive can be provided. It is determined by the combination of cleaning methods according to the present invention Glycol ether compounds and paraffinic hydrocarbons are used as cleaning liquids. High cleaning performance can be obtained without using a surfactant, and the cleaning liquid for removing the object can be dissolved after washing with distillation. The cleaning liquid is recovered and reused. Therefore, the method according to the present invention can significantly reduce industrial waste and greatly reduce the cleaning cost. Furthermore, according to the cleaning method of the present invention, the cleaning liquid adhering to the object to be washed can be easily removed using water, and the cleaning liquid adhering to the object to be washed can be easily removed by drying. Various changes of the present invention can be easily implemented by those skilled in the art without departing from the scope and spirit of the present invention. Therefore, the scope of patent application in this case should not be limited by the above, but should be interpreted more broadly. (Please read the notes on the back before filling out this page) The paper size printed by the Employees' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs applies the Chinese National Standard (CNS) A4 specification (210X297 mm). Application date: February 16, 2005 No. 85101990 Class C π D% 〇 (The above columns are filled by the Bureau) ί X4- Bulletin 510920 g Wang patent specification (revised page) Chinese parts cleaning method Invention name English

A METHOD FOR WASHING PARTS Name Nationality (1) Toshio Shino (2) Nobuyoshi Shinoda (3) Nobuyoshi Sonoda (1) Japanese (25 Japanese and Japanese inventor (1) Togo Takago-37-2, Moriguchi, Osaka Prefecture, Japan Eighteen residences and residences (2) Minami Gumi, Ikoma, Nara Prefecture, Japan (3) Nakajima Nakai, Totsutsu, Osaka Prefecture, Japan-3-5 r Name (Name) Intellectual Property of the Ministry of Economic Affairs-^ M worker consumption Cooperative prints applicant's nationality, residence (office) Representative name (1) Matsushita Electric Industrial Co., Ltd. Matsushita Electric Industrial Co., Ltd. 0 Daiichi Industries Pharmaceutical Co., Ltd. Daiichi Industries Co., Ltd. (1) Japan 0 Japan (1) Japan's largest character gate, Manno-shi, Osaka, Japan. (2) Japan's Kyoto City, Kyoto-shi, Kyoto, Japan. CNS) A4 specification (210X297 mm) 510920 Wisdom 1/4 by Ministry of Economic Affairs_Printed by the Industrial and Consumer Cooperatives, dated February 16, 85, case number 85101990, the columns above the category are filled by this bureau) A4 C4

English § {9B) First name, last name, nationality, Nobuchi, Kazuo, and He Zefan_Shimabe I. Inventor Residence, Residence Name (Name) Nationality Japan 〇 Japan 6) Japan (4) Japan, Kyoto Prefecture, Kyoto Prefecture, Minami-ku, Ishihara Nagata-cho 2nd, Terado-machi, Terado-cho, Muko-shi, Kyoto Prefecture, JapanB) 3, Nishikyogami-machi, Youkyo-ku, Kyoto, Kyoto, Japan

Informer please S3, Residence (Office) Representative Name Last paper size applies to Chinese National Standard (CNS) A4 (210X297 mm)

Claims (1)

510920 I owe ': C! Year λ η | 91 · 9. 17 VI. Application for Patent Scope No. 8 5 1 0 1 9 9 0 Chinese Patent Application Amendment (please read the notes on the back before filling in this Page) Amended in September, 1991. 1. A method for cleaning parts, which is a method for removing objects to be cleaned from a group of objects selected from the group consisting of solder and hot-melt adhesives. The method comprises the step of washing the object to be cleaned with a washing liquid consisting essentially of a glycol ether component A and a paraffinic hydrocarbon component B, wherein the component A is at least one selected from the following Formula I and Formula Π ( I)... (II) R ^ O- (CH2-CH2-0) 2-R2 ch3! R2-0- (CH2-0H-0) 2-R4 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (in Chinese) R1 and R2 are each independently methyl or ethyl, and R3 and R4 are methyl) respectively, a group of glycol ether compounds represented by water-soluble glycol ether compounds; component B is at least one selected from carbon atoms 1. 〇 ~ 1 3 paraffin hydrocarbon compounds grouped by normal paraffin hydrocarbons and isoparaffin hydrocarbons, wherein the mixing weight ratio of component A and component B is A: B = 50: 5 0 to 9 0: 1 0. 2. The cleaning method according to item 1 of the scope of patent application, wherein component A is at least one selected from the group consisting of diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, and diethylene glycol diethyl ether. Groups of glycol ether compounds; Component B is at least one type of paraffin-based hydrocarbons selected from the group consisting of n-undecane, n-dodecane, and isododecane. This paper size applies to Chinese National Standard (CNS) A4 specifications (210X 297 mm) 510920 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A8 B8 C8 D8 6. Application for patent scope 3. Such as cleaning of the scope of patent application item 1 The method, wherein component a is at least one type of glycol ether compound selected from the group consisting of diethylene glycol dimethyl ether and dipropylene glycol dimethyl ether; and component B is n-decane. 4. The cleaning method according to item 1 of the scope of patent application, comprising the step of removing the cleaning liquid adhering to the object to be washed with water. 5. The cleaning method according to item 4 of the patent application scope, comprising the step of removing the cleaning liquid adhering to the object to be washed by drying. 6. The cleaning method according to item 1 of the scope of the patent application, which includes the steps of recovering the cleaning solution from the cleaning solution after removing the dissolved object by distillation, and reusing the recovered cleaning solution. The step of cleaning the liquid to be washed. 7. The cleaning method according to item 1 of the patent application range, wherein the removal object is a hot-melt adhesive. 8. A method for cleaning parts, which is a method for removing an object to be cleaned from a group of objects selected from the group consisting of a flux and a hot-melt adhesive. Alcohol ether component A and paraffin-based hydrocarbon component B, and the average boiling point of the component A and the average boiling point difference of the component B within 7 ° OmmHg are within 10 ° C. The cleaning solution is washed. And the steps of dissolving and removing the cleaning solution from the object after washing, and distilling and recovering the cleaning solution, wherein the above-mentioned component A is at least one selected from the following formulas II and IV, (Please read the precautions on the back first (Fill in this page again) This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm)-2-510920 Printed by A8, B8, C8, D8, Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. Application scope of patents (CH2-CH2- 0) (ΙΠ) CH3 7 I * R7 —〇 一 (CH2 — CH — 〇) 2 —: Ra · (IY) (where R5 is an aliphatic group having 1 to 4 carbon atoms, R6 is hydrogen, and R7 is Methyl or ethyl, and R8 is hydrogen And the above-mentioned component B is at least one kind of paraffin-based hydrocarbons selected from the group of normal paraffin-based hydrocarbons having 10 to 13 carbon atoms, wherein the mixing weight ratio of component A to component B is A: · B = 50: 50 ~ 90 ·· 10 ° 9. The method of cleaning according to item 8 of the scope of patent application, wherein component A is at least one selected from diethylene glycol monoethyl ether and diethylene glycol monoisopropyl Glycol ethers, diethylene glycol monopropyl ether, diethylene glycol monoisobutyl ether, and dipropylene glycol monoethyl ether in a group of glycol ether compounds, and the above component B is at least one selected from the group consisting of Paraffin-based hydrocarbons grouped by dioxane'-n-tridecane and isotridecane. 10. The cleaning method according to item 8 of the scope of patent application, comprising the step of removing the cleaning liquid adhering to the object to be washed with water. 1 1. The cleaning method according to item 8 of the scope of the patent application, comprising the step of washing the object to be cleaned again by using a cleaning solution recovered by distillation. (Please read the precautions on the back before filling out this page) The paper size is applicable to China National Standard (CNS) A4 (210X297 mm) -3-