CN105522297A - Disposable flux and preparation method thereof - Google Patents

Abstract

The invention provides a disposable flux, comprising: 80-90 parts by weight of isopropanol; 0.5-3 parts by weight of triethanolamine; 3-10 parts by weight of ethylene glycol butyl ether; 2-5 parts by weight of citric acid; 0.5-2 parts by weight of succinic acid; 0.5-2 parts by weight of lauric acid; 0.005-0.02 part by weight of an emulsifying agent; and 0.05-0.2 part by weight of benzotriazole. The disposable flux is free of halogen, thereby avoiding halogen residue; with the materials which are safe and pollution free, the flux generates little odor and smoke during welding and is harmless to environment and human body, giving environmental friendliness. The disposable flux is high in welding assistance, and a welded product has clean surface and is attractive and non-adhesive.

Description

Cleaning-free scaling powder and preparation method thereof

Technical field

The invention belongs to welding technology field, particularly relate to a kind of cleaning-free scaling powder and preparation method thereof.

Background technology

Scaling powder is normally the mixture of main component with rosin, is the auxiliary material ensureing that welding process is carried out smoothly.Welding is the main processes in electronic assemblies, the auxiliary material used when scaling powder is welding, and the Main Function of scaling powder is the oxide removing solder and welded mother metal surface, makes the cleannes that metal surface reaches necessary.When it prevents from welding, the oxidation again on surface, reduces solder surface tension, improves welding performance. and the quality of scaling powder performance, directly has influence on the quality of electronic product.

In recent decades, produce in soldering process process at electronic product, general many use major oil systems scaling powder.Although this kind of scaling powder solderability is good, cost is low, and postwelding remains object height, and its residue contains halide ion, progressively can cause the problems such as electrical insulation properties decline and short circuit.Address this problem, the abietic resin system film of flux residue in electronic seal making sheet must be cleaned, so not only can increase production cost, and the cleaning agent mainly fluorine chlorine compound of cleaning abietic resin system welding assisted agent residuals.This compound is the loss material of atmospheric ozone layer, the row belonging to forbidding and be eliminated.

Cleaning-free scaling powder primary raw material is organic solvent, abietic resin and derivative thereof, synthetic resin surfactant, organic acid for activating agent, anticorrosive, cosolvent, film forming agent, it is briefly the mixed solution that various dissolve solid components forms homogeneous transparent in various liquid, wherein various composition proportion is different, and role is also different.Prior art discloses multiple cleaning-free scaling powder, the Chinese patent literature being CN101380705B as grant number discloses a kind of high active no-clean welding flux, comprises the trimethylborate of 45.0% ~ 80.0%, the acetone of 0.01% ~ 10.0%, the cesium fluoride of 0.001 ~ 1.0% or rubidium fluoride RbF, the ether of 0.001% ~ 2.5% and the methyl alcohol of surplus.This scaling powder help weldering ability higher, but cesium fluoride wherein or rubidium fluoride RbF have severe corrosive, and easily produce halide ion and remain.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of cleaning-free scaling powder and preparation method thereof, cleaning-free scaling powder provided by the invention helps weldering ability higher, and halogen ion-free remains, and welding time produce smell and smog less.

The invention provides a kind of cleaning-free scaling powder, comprising: the isopropyl alcohol of 80 ~ 90 mass parts; The triethanolamine of 0.5 ~ 3 mass parts; The butyl glycol ether of 3 ~ 10 mass parts; The citric acid of 2 ~ 5 mass parts; The succinic acid of 0.5 ~ 2 mass parts; The laurate of 0.5 ~ 2 mass parts; The emulsifying agent of 0.005 ~ 0.02 mass parts and the BTA of 0.005 ~ 0.2 mass parts.

In one embodiment, described cleaning-free scaling powder comprises: the isopropyl alcohol of 87.98 mass parts; The triethanolamine of 1 mass parts; The butyl glycol ether of 5 mass parts; The citric acid of 4 mass parts; The succinic acid of 1 mass parts; The laurate of 1 mass parts; The emulsifying agent of 0.01 mass parts and the BTA of 0.01 mass parts.

In one embodiment, described emulsifying agent is polyoxyethylene nonylphenol ether.

Present invention also offers the preparation method of the cleaning-free scaling powder described in a kind of technique scheme, it is characterized in that, comprising:

Isopropyl alcohol, triethanolamine, butyl glycol ether and emulsifying agent are mixed, obtains mixed solution;

Citric acid, succinic acid, laurate and BTA are joined in mixed solution and dissolves, obtain cleaning-free scaling powder.

Citric acid, succinic acid, laurate and BTA join after in mixed solution by the present invention, preferably under the condition of magnetic agitation, make solid material dissolves.

Compared with prior art, cleaning-free scaling powder provided by the invention comprises the isopropyl alcohol of 80 ~ 90 mass parts; The triethanolamine of 0.5 ~ 3 mass parts; The butyl glycol ether of 3 ~ 10 mass parts; The citric acid of 2 ~ 5 mass parts; The succinic acid of 0.5 ~ 2 mass parts; The laurate of 0.5 ~ 2 mass parts; The emulsifying agent of 0.005 ~ 0.02 mass parts and the BTA of 0.005 ~ 0.2 mass parts.Scaling powder provided by the invention, in welding process, can be removed the oxide layer of welding material surface, make the surface tension between tin liquor and welded material reduce simultaneously, the performance strengthen tin liquor flowing, infiltrating, thus helps through welding.Cleaning-free scaling powder provided by the invention is not halogen-containing, can not cause halogen residue; And adopt materials safety pollution-free, the smell produced in welding process and smog less, to environment and body harmless, comparatively environmental protection.Cleaning-free scaling powder provided by the invention helps weldering ability comparatively strong, and after welding, product surface is clean, attractive in appearance, tack-free.

Detailed description of the invention

Embodiment 1

Composition of raw materials:

87.98 the isopropyl alcohol of mass parts; The triethanolamine of 1 mass parts; The butyl glycol ether of 5 mass parts; The citric acid of 4 mass parts; The succinic acid of 1 mass parts; The laurate of 1 mass parts; The polyoxyethylene nonylphenol ether of 0.01 mass parts; The BTA of 0.01 mass parts.

Preparation method is as follows:

Isopropyl alcohol, triethanolamine, butyl glycol ether and emulsifying agent are mixed, obtains mixed solution; Citric acid, succinic acid, laurate and BTA are joined in mixed solution, dissolves under magnetic stirring, obtain cleaning-free scaling powder.

Welding rod is put into above-mentioned cleaning-free scaling powder, soaks five minutes, slightly dry after taking-up.Electric iron is heated to 350 DEG C, solder horn keeps clean, without oxides such as welding slags.Solder horn is placed in the junction of welding rod and cell panel, stops 1 ~ 2 second, slowly welds, until terminal along welding circuit.With the cell panel of the welding rod of stanniferous 60% lead 40% and 95% silver content for experiment material, welding pulling force improves about 10%.The smell produced in welding process and smog less, to environment and body harmless, comparatively environmental protection.Weld the product surface obtained clean, attractive in appearance, tack-free.

Embodiment 2

Composition of raw materials:

The isopropyl alcohol of 80 mass parts; The triethanolamine of 2 mass parts; The butyl glycol ether of 3 mass parts; The citric acid of 2 mass parts; The succinic acid of 0.5 mass parts; The laurate of 2 mass parts; The polyoxyethylene nonylphenol ether of 0.015 mass parts; The BTA of 0.015 mass parts.

Preparation method is as follows:

Isopropyl alcohol, triethanolamine, butyl glycol ether and emulsifying agent are mixed, obtains mixed solution; Citric acid, succinic acid, laurate and BTA are joined in mixed solution, dissolves under magnetic stirring, obtain cleaning-free scaling powder.

Welding rod is put into above-mentioned cleaning-free scaling powder, soaks five minutes, slightly dry after taking-up.Electric iron is heated to 350 DEG C, solder horn keeps clean, without oxides such as welding slags.Solder horn is placed in the junction of welding rod and cell panel, stops 1 ~ 2 second, slowly welds, until terminal along welding circuit.With the cell panel of the welding rod of stanniferous 60% lead 40% and 95% silver content for experiment material, welding pulling force improves about 8%.The smell produced in welding process and smog less, to environment and body harmless, comparatively environmental protection.Weld the product surface obtained clean, attractive in appearance, tack-free.

Embodiment 3

Composition of raw materials:

The isopropyl alcohol of 90 mass parts; The triethanolamine of 0.5 mass parts; The butyl glycol ether of 3 mass parts; The citric acid of 4 mass parts; The succinic acid of 1 mass parts; The laurate of 1 mass parts; The polyoxyethylene nonylphenol ether of 0.01 mass parts; The BTA of 0.01 mass parts.

Preparation method is as follows:

Isopropyl alcohol, triethanolamine, butyl glycol ether and emulsifying agent are mixed, obtains mixed solution; Citric acid, succinic acid, laurate and BTA are joined in mixed solution, dissolves under magnetic stirring, obtain cleaning-free scaling powder.

Welding rod is put into above-mentioned cleaning-free scaling powder, soaks five minutes, slightly dry after taking-up.Electric iron is heated to 350 DEG C, solder horn keeps clean, without oxides such as welding slags.Solder horn is placed in the junction of welding rod and cell panel, stops 1 ~ 2 second, slowly welds, until terminal along welding circuit.With the cell panel of the welding rod of stanniferous 60% lead 40% and 95% silver content for experiment material, welding pulling force improves about 9%.The smell produced in welding process and smog less, to environment and body harmless, comparatively environmental protection.Weld the product surface obtained clean, attractive in appearance, tack-free.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (3)

1. a cleaning-free scaling powder, is characterized in that, comprising: the isopropyl alcohol of 80 ~ 90 mass parts; The triethanolamine of 0.5 ~ 3 mass parts; The butyl glycol ether of 3 ~ 10 mass parts; The citric acid of 2 ~ 5 mass parts; The succinic acid of 0.5 ~ 2 mass parts; The laurate of 0.5 ~ 2 mass parts; The emulsifying agent of 0.005 ~ 0.02 mass parts and the BTA of 0.005 ~ 0.2 mass parts.

2. cleaning-free scaling powder according to claim 1, is characterized in that, comprising: the isopropyl alcohol of 87.98 mass parts; The triethanolamine of 1 mass parts; The butyl glycol ether of 5 mass parts; The citric acid of 4 mass parts; The succinic acid of 1 mass parts; The laurate of 1 mass parts; The emulsifying agent of 0.01 mass parts and the BTA of 0.01 mass parts.

3. the preparation method of cleaning-free scaling powder according to claim 1, is characterized in that, comprising:

Isopropyl alcohol, triethanolamine, butyl glycol ether and emulsifying agent are mixed, obtains mixed solution;

Citric acid, succinic acid, laurate and BTA are joined in mixed solution and dissolves, obtain cleaning-free scaling powder.