PCBA (printed circuit board assembly) cleaning agent as well as preparation and application thereof

Abstract

The invention relates to the technical field of cleaning agents, in particular to a PCBA cleaning agent and preparation and application thereof. Comprising the following components in parts by weight: 40-45 parts of ethanol; 35 to 40 parts of isopropyl alcohol; 5 to 10 parts of petroleum hydrocarbon; and 2-7 parts of alcohol ether. According to the PCBA cleaning agent disclosed by the invention, the raw materials of isopropanol and ethanol are easy to obtain and are similar to a solvent of a soldering flux, so that a similar intermiscible effect can be achieved; and the D30 # solvent oil and the butyl carbitol can realize dissolution of the rosin and can reduce the surface tension of the cleaning agent, so that the cleaning of the scaling powder in small gaps is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning agents, and particularly relates to a PCBA cleaning agent and its preparation and application. Background Art

[0002] At present, the interlock acquisition drive board needs to be cleaned with a cleaning agent, requiring a clean surface, no residual soldering flux and white residues, and at the same time, the PCBA after cleaning should meet the requirements of Class 3 products in IPC610. Existing PCBA cleaning agents contain a large number of components, and based on the increasingly stringent cleaning quality requirements for track signal products in this field; it is crucial to provide a PCBA cleaning agent with fewer components and strong cleaning power. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a PCBA cleaning agent and its preparation and application. The PCBA cleaning agent of the present invention has fewer components and good cleaning ability; and the preparation method is simple, suitable for large-scale production applications.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] The first purpose of the present invention is to provide a PCBA cleaning agent, comprising the following components in parts by weight:

[0006] Alcohols: 75 - 85 parts; petroleum hydrocarbons: 5 - 10 parts; alcohol ethers: 2 - 7 parts.

[0007] In an embodiment of the present invention, the alcohols are a mixture of ethanol and isopropanol.

[0008] In an embodiment of the present invention, the alcohols comprise the following components in parts by weight:

[0009] Ethanol: 40 - 45 parts; isopropanol: 35 - 40 parts.

[0010] In an embodiment of the present invention, it comprises the following components in parts by weight:

[0011] Ethanol: 42 - 44 parts; isopropanol: 37 - 39 parts; petroleum hydrocarbons: 6 - 8 parts; alcohol ethers: 3 - 6 parts;

[0012] Preferably, it comprises the following components in parts by weight:

[0013] Ethanol: 43 parts; isopropanol: 38 parts; petroleum hydrocarbons: 7 parts; alcohol ethers: 5 parts.

[0014] In an embodiment of the present invention, the petroleum hydrocarbon is D30 solvent oil.

[0015] In an embodiment of the present invention, the alcohol ether is butyl carbitol.

[0016] The second object of the present invention is to provide a preparation method of a PCBA cleaning agent, comprising the following steps:

[0017] Mix alcohols, petroleum hydrocarbons and alcohol ethers to obtain a PCBA cleaning agent.

[0018] The third object of the present invention is to provide an application of a PCBA cleaning agent in cleaning PCBA.

[0019] In an embodiment of the present invention, the PCBA cleaning agent is diluted before use.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the PCBA cleaning agent of the present invention, isopropyl alcohol and ethanol raw materials are easily obtained, and are similar to the solvent of the soldering flux, and can achieve a better effect of similar dissolution; Solvent oil D30 and butyl carbitol can dissolve rosin, and at the same time can reduce the surface tension of the cleaning agent, thereby improving the cleaning of the soldering flux in small gaps. Specific Embodiments

[0022] The present invention will be described in detail below with reference to specific embodiments.

[0023] In the following embodiments, unless otherwise specified, the reagents used are commercially available reagents, and the detection means and methods used are conventional detection means and methods in the art.

[0024] Example 1

[0025] This example provides a PCBA cleaning agent and its preparation method, comprising the following steps:

[0026] Ultrasonically mix 43 parts of ethanol, 38 parts of isopropyl alcohol, 7 parts of petroleum hydrocarbons and 5 parts of alcohol ethers to obtain a PCBA cleaning agent.

[0027] Example 2

[0028] This example provides a PCBA cleaning agent and its preparation method, comprising the following steps:

[0029] Ultrasonically mix 42 parts of ethanol, 39 parts of isopropyl alcohol, 6 parts of petroleum hydrocarbons and 6 parts of alcohol ethers to obtain a PCBA cleaning agent.

[0030] Example 3

[0031] This example provides a PCBA cleaning agent and its preparation method, comprising the following steps:

[0032] Ultrasonically mix 44 parts of ethanol, 37 parts of isopropyl alcohol, 8 parts of petroleum hydrocarbons and 3 parts of alcohol ethers to obtain a PCBA cleaning agent.

[0033] Example 4

[0034] This example provides a PCBA cleaning agent and a preparation method thereof, including the following steps:

[0035] Ultrasonically mix 40 parts of ethanol, 40 parts of isopropanol, 5 parts of petroleum hydrocarbon and 7 parts of alcohol ether to obtain the PCBA cleaning agent.

[0036] Example 5

[0037] This example provides a PCBA cleaning agent and a preparation method thereof, including the following steps:

[0038] Ultrasonically mix 45 parts of ethanol, 35 parts of isopropanol, 10 parts of petroleum hydrocarbon and 2 parts of alcohol ether to obtain the PCBA cleaning agent.

[0039] Comparative Example 1

[0040] This comparative example provides a PCBA cleaning agent and a preparation method thereof, including the following steps:

[0041] Ultrasonically mix 90 parts of isopropanol, 7 parts of petroleum hydrocarbon and 5 parts of alcohol ether to obtain the PCBA cleaning agent.

[0042] Comparative Example 2

[0043] This comparative example provides a PCBA cleaning agent and a preparation method thereof, including the following steps:

[0044] Ultrasonically mix 90 parts of ethanol, 7 parts of petroleum hydrocarbon and 5 parts of alcohol ether to obtain the PCBA cleaning agent.

[0045] Comparative Example 3

[0046] This comparative example provides a PCBA cleaning agent and a preparation method thereof, including the following steps:

[0047] Ultrasonically mix 50 parts of ethanol, 30 parts of isopropanol, 11 parts of petroleum hydrocarbon and 1 part of alcohol ether to obtain the PCBA cleaning agent.

[0048] Comparative Example 4

[0049] This comparative example provides a PCBA cleaning agent and a preparation method thereof, including the following steps:

[0050] Ultrasonically mix 35 parts of ethanol, 45 parts of isopropanol, 2 parts of petroleum hydrocarbon and 10 parts of alcohol ether to obtain the PCBA cleaning agent.

[0051] Comparative Example 5

[0052] The PCBA cleaning agent of this comparative example is the commercially available microelectronic cleaning agent Q-115.

[0053] Performance analysis:

[0054] The cleaning agents described in Examples 1-5 and Comparative Examples 1-5 were mixed with water at a mass ratio of 1:1, heated to 55 °C, and then used to clean the PCBA boards after wave soldering with IF 2005M solder flux. The cleaning effect and surface damage were observed through visual inspection and microscopy (as shown in Table 1).

[0055] Table 1 Summary of the cleaning effects of Examples 1-5 and Comparative Examples 1-5

[0056]

[0057]

[0058] It can be found from Table 1 that the PCBA cleaning agents prepared in Examples 1-5 have good cleaning effects and do not damage the PCBA boards; the cleaning effects of the PCBA cleaning agents obtained in Comparative Examples 1-4 are worse than those in Examples 1-5. Although the cleaning agent in Comparative Example 5 has a good cleaning effect, it will damage the PCBA boards.

[0059] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention as interpreted according to the present invention should be within the protection scope of the present invention.

Claims

1. A PCBA cleaning agent, characterized in that: The composition comprises the following components in parts by weight: Alcohols: 75-85 parts; petroleum hydrocarbons: 5-10 parts; alcohol ethers: 2-7 parts.

2. A PCBA cleaning agent according to claim 1, characterized in that: The alcohol is a mixture of ethanol and isopropanol.

3. A PCBA cleaning agent according to claim 2, characterized in that: The alcohols include the following components in parts by weight: Ethanol: 40-45 parts; Isopropanol: 35-40 parts.

4. A PCBA cleaning agent according to claim 3, characterized in that: The composition comprises the following components in parts by weight: Ethanol: 42-44 parts; Isopropanol: 37-39 parts; Petroleum hydrocarbons: 6-8 parts; Alcohol ether: 3-6 parts.

5. A PCBA cleaning agent according to claim 4, characterized in that: The composition comprises the following components in parts by weight: Ethanol: 43 parts; Isopropanol: 38 parts; Petroleum hydrocarbon: 7 parts; Alcohol ether: 5 parts.

6. A PCBA cleaning agent according to claim 1, characterized in that: The petroleum hydrocarbon is D30 solvent oil.

7. A PCBA cleaning agent according to claim 1, characterized in that: The alcohol ether is butyl carbitol.

8. A method for preparing a PCBA cleaning agent as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Alcohols, petroleum hydrocarbons and alcohol ethers are mixed to obtain a PCBA cleaning agent.

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

10. The use according to claim 9, characterized in that: Dilute the PCBA cleaning agent before use.

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