A cleaning agent and its preparation method and application

Abstract

The present invention relates to a cleaning agent and a preparation method and application thereof, and belongs to the technical field of cleaning agents. The cleaning agent provided by the present invention comprises the following components by mass: 20-30 parts of modified alcohols, 5-8 parts of organic bases, 5-8 parts of ether solvents, and 1-2 parts of emulsifiers; the modified alcohols include propylene oxide ethylene oxide block copolyethers; the emulsifiers include at least one of nonionic emulsifiers and nonionic and cationic composite emulsifiers. The cleaning agent of the present invention can change the sorting structure of solid textured surface materials, achieve water-oil balance, and increase surface wetting tension. In addition, the cleaning agent of the present invention does not contain ODS cleaning agents, is harmless to the human body, and is environmentally friendly. It also does not contain hydrocarbon solvents, and can effectively solve the technical problem of dyne value decay starting from 2 days of storage of workpieces, without affecting the later storage or turnover period of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning agents, and in particular relates to a cleaning agent and a preparation method and application thereof. Background Art

[0002] The wetting we see in daily life is mostly different forms of liquid on the solid surface. The difference between different forms lies in the size of the contact angle between the fluid and the solid, which is also called the wetting angle. Usually, a contact angle of θ < 90° is expressed as hydrophilicity, and θ > 90° is hydrophobicity. Surface wetting tension, also known as surface tension, is a manifestation of molecular force. The quality of surface wettability is measured by the size of the contact angle, which is also an important feature of the solid surface. However, in reality, there are certain pits and stripes on the textured surface of the solid, and it is not feasible to directly measure the contact angle. In the production inspection and testing process, the wetting tension is fed back through the dyne value test. The higher the dyne value, the better the wetting performance, and vice versa, the worse the wetting performance.

[0003] Although the initial dyne value of the solid textured surface is very high, there is often a problem of dyne value attenuation. For example, after the metal surface is mechanically processed and processed, oily dirt is adhered to its surface to varying degrees. Oil is a non-polar substance and can only form a non-polar physical adsorption film on the metal surface, with poor lubrication performance. With the advancement of technology, the requirements for surface wetting performance in the production and application of mechanical parts are getting higher and higher, and dyne value attenuation is also a major problem. The main reason for the attenuation of dyne value is that the solid textured surface contains both polar and non-polar substances. Because of the different volatility of physical properties, the ratio of the two substances has changed, and its surface sorting structure has also changed. Polar substances can be firmly adsorbed on the solid textured surface. When polar molecules form a monolayer adsorption film on the metal surface, polar groups such as hydroxyl groups are adsorbed on the metal surface, while hydrocarbon groups face outward. The actual adsorption film is usually not just one layer, but often forms multiple layers, or even hundreds of layers, with polar groups and non-polar groups arranged alternately. Therefore, the type and proportion of polar and non-polar substances have a key influence on the formation of the adsorption film. The volatilization of polar substances causes the composition of the surface oil to change, causing the surface tension value to change, and thus the measured dyne value to change.

[0004] At present, the widely used cleaning agents are mainly solvent cleaning agents. ODS cleaning agents such as trichloroethylene and chloroform in solvent cleaning agents will destroy the atmospheric ozone layer and harm the health of operators due to the volatilization of organic solvents. Non-ODS solvent cleaning agents basically use hydrocarbon solvents. This agent is mainly a flammable and explosive product, and has relatively high requirements for the packaging, storage, transportation and use of the product. At the same time, most non-ODS solvent cleaning agents require manual wiping, which has certain toxic effects on the human body and has high labor costs. Non-ODS solvent cleaning agents have a low initial dyne value after cleaning under single component, which is difficult to meet the dyne value requirements and has timeliness. Generally, the dyne value begins to decay after 2 days of storage after cleaning. The market basically requires that the dyne value does not decrease for 5 days. Even if the storage environment is kept low temperature and dry or vacuum packaging is adopted, the phenomenon of dyne decay still exists, which causes great trouble to the later storage or turnover period of the product, especially affecting the subsequent processes.

[0005] Therefore, it is necessary to develop a cleaning agent that can increase the initial dyne value and maintain it. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art and to provide a cleaning agent and a preparation method and application thereof.

[0007] The present invention is achieved through the following technical solutions:

[0008] In a first aspect, the present invention provides a cleaning agent, which comprises the following components, measured by mass: 20-30 parts of modified alcohols, 5-8 parts of organic bases, 5-8 parts of ether solvents, and 1-2 parts of emulsifiers; the modified alcohols include propylene oxide and ethylene oxide block copolymers; the emulsifier includes at least one of a nonionic emulsifier and a nonionic and cationic composite emulsifier.

[0009] The cleaning agent of the present invention is compounded with modified alcohols, organic bases, ether solvents and emulsifiers. The organic bases can strip off some non-polar substances on the solid textured surface and change the ratio of polar and non-polar components; the ether solvents can increase the solubility of the cleaning agent to non-polar substances and prevent the non-polar components from sticking back; the modified alcohols can be further arranged alternately with the non-polar groups, and the outermost layer of the adsorption film arrangement is a modified hydroxyl group, which can increase the wetting tension of the surface; the emulsifier is a non-ionic emulsifier or a non-ionic and cationic composite emulsifier, which can effectively emulsify small molecular weight non-polar substances and clean the residual cleaning agent or dirt in small gaps. The cleaning agent of the present invention has excellent cleaning effect on the textured surface through reasonable compatibility between components, and the dyne value retention effect is excellent.

[0010] Preferably, the density of the modified alcohol is 0.75 g / cm 3~0.90g / cm 3 (20°C), boiling range of 170°C to 200°C, flash point of 55°C to 65°C, miscible water solubility, and percentage water content of 5% to 6.5%.

[0011] Preferably, the modified alcohols include DOWCLENE TM 1601、DOWCLENE TM 1611、Dow Chemical TM At least one of 1621.

[0012] The modified alcohols mentioned above have low toxicity and extremely high chemical stability.

[0013] More preferably, the modified alcohols include DOWCLENE TM 1601、DOWCLENE TM 1611、Dow Chemical TM At least two of 1621.

[0014] The use of the above two brands of modified alcohols in combination can make the cleaning agent have a better effect.

[0015] Preferably, the organic base includes at least one of choline, tetramethylammonium hydroxide, triethylenetetramine and sodium ethoxide.

[0016] More preferably, the organic base includes at least one of choline, tetramethylammonium hydroxide and triethylenetetramine.

[0017] Compared with sodium ethoxide, using choline, tetramethylammonium hydroxide, and triethylenetetramine as organic bases can be more suitable for the system of the present invention and improve the cleaning effect of the cleaning agent.

[0018] Preferably, the ether solvent includes at least one of ethylene glycol butyl ether, diethylene glycol butyl ether and diethylene glycol ethyl ether.

[0019] Preferably, the nonionic emulsifier comprises C16-C18 alcohol polyoxyethylene polyoxypropylene ether.

[0020] Specifically, the C16-C18 alcohol polyoxyethylene polyoxypropylene ether includes at least one of Linyi Lvsen LF-6842 and Linyi Lvsen LF-6864.

[0021] Preferably, the nonionic and cationic composite emulsifier includes Aksu BEROL-226SA.

[0022] In the cleaning agent of the present invention, the nonionic and cationic composite emulsifier has a better emulsification effect than the nonionic emulsifier, and can improve the cleaning ability of the cleaning agent.

[0023] Preferably, the cleaning agent also includes 52-69 parts of water.

[0024] The cleaning agent of the present invention is a water-based cleaning agent and is environmentally friendly and non-toxic.

[0025] In a second aspect, the present invention provides a method for preparing the cleaning agent, comprising the following steps: uniformly mixing the components according to the weight portions to obtain the cleaning agent.

[0026] In a third aspect, the present invention provides use of the cleaning agent in material cleaning.

[0027] Preferably, the material comprises a textured surface.

[0028] Preferably, the material includes one of PCB printed circuit board, nylon and metal.

[0029] The cleaning agent of the present invention can be applied to a variety of materials containing textured surfaces, such as PCB circuit printing plates, nylon and metals (such as copper, stainless steel), etc. The preferred material is nylon, which has a significant cleaning effect on nylon and maintains a good effect for a long time.

[0030] The present invention has the following beneficial effects: the cleaning agent of the present invention is a water-based product, and the organic base is matched with a solvent and an emulsifier with strong wettability and permeability, which can change the arrangement structure of the solid textured surface material, achieve water-oil balance, and increase the surface wetting tension. In addition, the cleaning agent of the present invention does not contain ODS cleaning agents, is harmless to the human body, and is environmentally friendly. It also does not contain hydrocarbon solvents, and can effectively solve the technical problem that the dyne value of the workpiece begins to decay after 2 days of storage, and does not affect the later storage or turnover period of the product. DETAILED DESCRIPTION

[0031] To better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. It should be understood by those skilled in the art that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Unless otherwise specified, the experimental methods used in the examples are all conventional methods; the materials, reagents, etc. used, unless otherwise specified, can be obtained from commercial channels.

[0033] In the following examples and comparative examples, 1601 refers to modified alcohol DOWCLENE TM 1601, 1611 Dow Chemical TM 1611, 1621 refers to Dow Chemical DOWCLENE TM1621; BEROL-226SA refers to the nonionic and cationic composite emulsifier Aksu BEROL-226SA; LF-6842 refers to the nonionic emulsifier Linyi Lusen LF-6842, LF-6864 refers to the nonionic emulsifier LF-6864; the acrylic polyether ester belongs to Sinopharm Chemical Reagent Co., Ltd. Brand, the specific ingredient is polyethylene glycol methyl ether acrylate, and the CAS number is 32171-39-4.

[0034] Example 1

[0035] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% choline, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0036] Example 2

[0037] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0038] Example 3

[0039] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% tetramethylammonium hydroxide, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0040] Example 4

[0041] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 5% ethylene glycol butyl ether, 2% BEROL-226SA, and the balance is water.

[0042] Example 5

[0043] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 5% diethylene glycol butyl ether, 2% BEROL-226SA, and the balance is water.

[0044] Example 6

[0045] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0046] Example 7

[0047] A cleaning agent, the raw material composition and weight percentage of which are: 20% 1601, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0048] Example 8

[0049] A cleaning agent, the raw material composition and weight percentage of which are: 20% 1611, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0050] Example 9

[0051] A cleaning agent, the raw material composition and weight percentage of which are: 20% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0052] Example 10

[0053] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1611, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0054] Embodiment 11

[0055] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1611, 10% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0056] Example 12

[0057] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 1% LF-6842, 1% LF-6864, and the balance is water.

[0058] Embodiment 13

[0059] A cleaning agent, the raw material composition and weight percentage of which are: 15% 1601, 15% 1621, 5% tetramethylammonium hydroxide, 3% triethylenetetramine, 3% diethylene glycol butyl ether, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0060] Embodiment 14

[0061] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% sodium ethoxide, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0062] Comparative Example 1

[0063] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% choline, 5% diethylene glycol ethyl ether, 2% sodium dodecylbenzene sulfonate (anionic emulsifier), and the balance is water.

[0064] Comparative Example 2

[0065] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% choline, 5% diethylene glycol ethyl ether, 2% dodecyltrimethylammonium chloride (cationic emulsifier), and the balance is water.

[0066] Comparative Example 3

[0067] A cleaning agent, the raw material composition and weight percentage of which are: 10% 1601, 10% 1621, 5% choline, 5% diethylene glycol ethyl ether, 2% dodecyl betaine (zwitterionic emulsifier), and the balance is water.

[0068] Comparative Example 4

[0069] A cleaning agent, the raw material composition and weight percentage of which are: 5% choline, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0070] Comparative Example 5

[0071] A cleaning agent, the raw material composition and weight percentage of which are: 20% acrylic acid polyether ester, 5% choline, 5% diethylene glycol ethyl ether, 2% BEROL-226SA, and the balance is water.

[0072] In each embodiment and comparative example, the components are mixed uniformly according to the weight parts to obtain the cleaning agent. The cleaning agents of the embodiments and comparative examples are used to clean the substrate printed circuit board, metal, and nylon plastic. The cleaning method is as follows: the concentration of the opening tank is 10%, the temperature is 50°C, and the spray cleaning is 10 minutes. After cleaning and drying, the dyne value of the substrate surface is immediately tested with a dyne pen. After the test, the substrate workpiece is stored in a sealed bag, and the dyne pen test is carried out in turn every other day for a total of 5 days. The results are shown in Tables 1-3.

[0073] Table 1 Cleaning results of cleaning agents on printed circuit boards

[0074]

[0075] Table 2 Cleaning results of cleaning agents on the surface of metal copper

[0076]

[0077]

[0078] Table 3 Cleaning results of cleaning agents on nylon plastics

[0079]

[0080]

[0081] As can be seen from Tables 1-3, the cleaning agent of the present invention has excellent cleaning effect and dyne value retention. As can be seen from the embodiments and comparative examples, the use of other types of emulsifiers cannot make the cleaning agent have a good dyne value retention effect. And the use of other types of modified alcohols will also reduce the dyne value. In addition, choline, tetramethylammonium hydroxide, and triethylenetetramine as organic bases have better cleaning effect and dyne value retention effect. Emulsifier BEROL-226SA has a better cleaning effect than LF-6842 and LF-6864.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A cleaning agent, characterized in that: The cleaning agent comprises the following components by weight: 20-30 parts of modified alcohols, 5-8 parts of organic bases, 5-8 parts of ether solvents, and 1-2 parts of emulsifiers; the modified alcohols comprise propylene oxide and ethylene oxide block copolymers; the emulsifier comprises at least one of a nonionic emulsifier and a nonionic and cationic composite emulsifier.

2. The cleaning agent according to claim 1, characterized in that The organic base includes at least one of choline, tetramethylammonium hydroxide, triethylenetetramine and sodium ethoxide.

3. The cleaning agent according to claim 1 or 2, characterized in that The organic base is at least one of choline, tetramethylammonium hydroxide and triethylenetetramine.

4. The cleaning agent according to claim 1, characterized in that The ether solvent includes at least one of ethylene glycol butyl ether, diethylene glycol butyl ether and diethylene glycol ethyl ether.

5. The cleaning agent according to claim 1, characterized in that The nonionic emulsifier includes C16-C18 alcohol polyoxyethylene polyoxypropylene ether.

6. The cleaning agent according to claim 1, characterized in that The nonionic and cationic composite emulsifier includes Aksu BEROL-226SA.

7. The cleaning agent according to claim 1, characterized in that The cleaning agent also includes 52-69 parts of water.

8. The method for preparing the cleaning agent according to any one of claims 1 to 7, characterized in that: The following steps are involved: The cleaning agent is obtained by uniformly mixing the components according to the weight portions.

9. Use of the cleaning agent according to any one of claims 1 to 7 in material cleaning.

10. Use of the cleaning agent according to claim 9 in material cleaning, characterized in that: The material includes one of a PCB printed circuit board, nylon and metal.

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