Water-based organic paste and aluminum solder paste comprising paste

Abstract

The invention discloses water-based organic paste. The water-based organic paste comprises a matrix and an additive, wherein the matrix comprises a water-based organic solvent and water-based high polymer. The matrix of the water-based organic paste has a polar hydrophilic group, also has a non-polar lipophilic group, integrates the advantages of water and oil organic substances, abandons the defects of the water and oil organic substances, has mutual solubility with water, and can be blended with water; and in the presence of water-based high polymer, viscosity of the matrix is relatively high, so that anti-settling performances of the solder paste prepared from the matrix can be effectively improved. Meanwhile, the invention further discloses solder paste comprising the water-based organic paste. The aluminum solder paste can realize automatic charging, and also has the characteristics of being easy to clean, environmentally friendly, high in welding quality and the like.

Description

technical field [0001] The invention relates to an organic paste and an aluminum solder paste containing the paste, in particular to a water-based organic paste and an aluminum solder paste containing the paste. Background technique [0002] In industries such as kitchen utensils, small household appliances and electric heating appliances, brazing of aluminum-aluminum (aluminum alloy) and aluminum-stainless steel is often involved, and aluminum brazing flux and aluminum brazing filler metal are required. Aluminum brazing flux, whose main component is potassium fluoroaluminate, plays a chemical auxiliary role in removing the surface oxide scale of the base metal and aluminum brazing filler metal; aluminum brazing filler metal, whose main component is aluminum-silicon alloy, plays a role in firmly metallurgical the two base metals The main body of the connection is welded. The two are used together, and one is indispensable. The role of aluminum brazing flux is the first, and...

AI Technical Summary

Problems solved by technology

The main reasons are: (1) Due to the low viscosity of water, the aluminum flux can not be effectively bonded together; (2) The oily organic matter may not be well mixed with inorganic matter (powdered) due to its own properties or formulation conditions. Aluminum flux and solder) are organically fused, resulting in the separation of solid and liquid phases in the feeding tube when the aluminum solder paste made of them is pneumatically propelled and fed, forming a blockage, and continuous automatic feeding cannot be realized

[0005] In addition, if water is used as the carrier, due to the chemical activity of powdered aluminum solder, it will chemically react with water, resulting in thickening of the oxide scale of aluminum solder and affecting the welding quality.

If oily organic matter is used as the carrier, due to its greasy, it will lead to environmental sanitation and not easy to clean; it will produce smoke when heating and welding, which is not environmentally friendly; cracking is difficult to complete, and carbon deposits will remain after welding, etc.

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