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Detergent composition for cleaning precision parts

A technology for precision parts and detergents, applied in the directions of detergent compositions, surface-active detergent compositions, non-surface-active detergent compositions, etc. Satisfactory or unsatisfactory flux cleanability, etc.

Inactive Publication Date: 2003-10-22
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, although the detergent exhibited high flux detergency for commonly used eutectic soft solders containing tin / lead, it was not effective in lead-free solders or with added thixotropic agents such as N,N-ethylenebisstearamide The detergent exhibited unsatisfactory flux clean-out performance in fine-pitch fluxes used in quantities
In addition, detergents using glyceryl ether as a dissolution aid also have unsatisfactory detergency against fluxes such as the above-mentioned lead-free solder
[0006] Also, as for liquid crystal stains, the pitch between liquid crystal elements has become even narrower with the development of thinner liquid crystal display panels, with the result that it has become increasingly difficult to wash liquid crystals present in the gaps
When liquid crystal stains were removed using the conventional detergent composition described above, the detergency was not satisfactory for those liquid crystals existing in the gaps, although the detergency was satisfactory for those liquid crystals present on the surface. good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8 and comparative example 1-3

[0038] The components were added and mixed so as to obtain the compositions shown in Table 1 to obtain the respective detergent compositions of Examples 1-8 and Comparative Examples 1-3. Next, each detergent composition was placed in a container for washing, and the above-mentioned test substrate was immersed in the detergent composition at 60° C. for 5 minutes. Thereafter, it was rinsed with ion-exchanged water at 60° C. for 1 minute. Subsequently, the rinsed substrate was dried at 80° C. for 20 minutes. The surface of the test substrate was observed with the naked eye, and the detergency with respect to the flux was evaluated based on the following evaluation criteria. The results are shown in Table 2.

[0039] [Standards for evaluating the detergency of fluxes]

[0040] A: Excellent cleaning (no residual sticking of flux residue)

[0041] B: Slightly poor washing (stickiness remains slightly)

[0042] C: Poorly washed (a large amount of residual sticking was seen)

[...

Embodiment 9-12 and comparative example 4-6

[0062] The components were added and mixed so as to obtain the compositions shown in Table 3 to obtain the respective detergent compositions of Examples 9-12 and Comparative Examples 4-6. The test substrates were ultrasonically washed in each of the prepared detergent compositions for 5 minutes at 30°C. Thereafter, each test substrate was rinsed in four pure water tanks (40° C.) for 3 minutes. Subsequently, the rinsed substrate was dried at 90° C. for 30 minutes with a hot air drier, and was referred to as an observation sample.

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PUM

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Abstract

A detergent composition for cleaning a precision part, comprising an organic solvent, 5 to 30% by weight of a glyceryl ether having an alkyl group or alkenyl group having 4 to 12 carbon atoms, and 5% by weight or more of water. The detergent composition can be used for cleaning a precision part such as a metal part, an electronic part, a semiconductor part or a liquid crystal display panel.

Description

technical field [0001] This invention relates to detergent compositions for cleaning precision parts. More particularly, the present invention relates to an aqueous detergent composition for washing precision parts such as metal parts, electronic parts, semiconductor parts or liquid crystal display panels. Background technique [0002] Conventionally, wiring connections of printed substrates, semiconductor components, etc. are soldered by screen printing using solder paste. This solder paste consists of eutectic soft solder components containing tin / lead, and resins, activators, antioxidants, thixotropic agents and solvents used to increase screen printability and wiring reliability after connection The so-called flux components. The flux component included here has important functions such as removal of the metal oxide coating film at the joint portion. However, once the connection is made, the flux components thereafter have the potential to degrade the reliability of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D3/43C11D1/68C11D3/18C11D3/20C11D7/24C11D7/26C11D7/50C11D11/00
CPCC11D7/263C11D7/5004C11D3/43C11D11/0047C11D7/24C11D3/18C11D3/2034C11D3/2068C11D2111/22C11D7/26
Inventor 林藤克彦桥本良一根岸政隆
Owner KAO CORP
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