A kind of water-based flux and preparation method thereof

A flux, water-based technology, used in welding equipment, welding media, manufacturing tools, etc., can solve the problems of low surface insulation resistivity, incomplete and uneven solder joints, flammable and explosive, etc., to achieve excellent lubricity, Good water solubility

CN104551452BActive Publication Date: 2017-04-12HUIZHOU QIANGDA ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-04-12

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Abstract

The invention relates to a water-based soldering flux, which comprises the following raw materials in parts by weight: 0.3-1% of alkyl dicarboxylic acid, 1-4% of polyglycol, 1.5-4.5% of ammonium chloride, 0.8-3.3% of glycerinum, 1.3-5.3 of citric acid, 1-20% of nonylphenol polyether phosphate, 0.05-0.6% of surfactant, 1-30% of water, and 31-90% of solvent. The water-based soldering flux has advantages of low solid content, high boiling point, slow volatilization, fire resistance, high safety and environment protection, without smell. The invention further discloses a preparation method of the water-based soldering flux, comprising the following steps of: weighing the material according to formula ratio; adding solvent in a first vessel and nonylphenol polyether phosphate to a first reacting kettle, and then completely stirring; adding the surfactant and solvent in a second vessel to a second reacting kettle, and then completely stirring; adding the alkyl dicarboxylic acid, the polyglycol, the ammonium chloride, the glycerinum, the citric acid, the water, a first dispersion, a second dispersion and solvent in a third vessel to a third reacting kettle, and then completely stirring; uniformly dispersing to obtain a finish product. The preparation method of the water-based soldering flux has advantages of simple process, easy operations and high production efficiency.
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Description

technical field

[0001] The invention relates to the technical field of chemicals, in particular to a water-based flux and a preparation method thereof. Background technique

[0002] Flux: A chemical substance that aids and facilitates the soldering process while protecting it from oxidation during the soldering process. Flux can be divided into solid, liquid and gas. There are mainly several aspects such as "auxiliary heat conduction", "removal of oxides", "reduction of surface tension of welded materials", "removal of oil stains on the surface of welded materials, increase of welding area", and "prevention of re-oxidation". There are two key functions in this aspect: "removing oxides" and "reducing the surface tension of the material to be welded".

[0003] The existing soldering flux has high solid content, low boiling point, fast volatilization, strong odor, inflammability and explosion, easy fire in the preheating and welding stages, and poor safety. Existing solderin...

Examples

Embodiment 1

[0062] A kind of water-based soldering flux of the present invention comprises the raw material of following mass percentage:

[0063]

[0064]

[0065] A preparation method of water-based flux, comprising the following processing steps:

[0066] Step A. Accurately weigh the amount of materials according to the formula, and place them in different containers;

[0067] Among them, when weighing the solvent, it is weighed three times. For the first time, the solvent equal to the mass of nonylphenol polyether phosphate is weighed and placed in the first container. The second time, the solvent equal to the mass of the surfactant is weighed. Place the solvent in the second container, weigh the solvent of the remaining amount of the formula for the third time, and place it in the third container;

[0068] Step B, adding the nonylphenol polyether phosphate and the solvent in the first container into the first reaction kettle, and fully stirring, so that the nonylphenol polyeth...

Embodiment 2

[0072] A kind of water-based soldering flux of the present invention comprises the raw material of following mass percentage:

[0073]

[0074] Wherein, the hindered phenolic antioxidant is antioxidant 1010.

[0075] A preparation method of water-based flux, comprising the following processing steps:

[0076] Step A. Accurately weigh the amount of materials according to the formula, and place them in different containers;

[0077] Among them, when weighing the solvent, it is weighed three times. For the first time, the solvent equal to the mass of nonylphenol polyether phosphate is weighed and placed in the first container. The second time, the solvent equal to the mass of the surfactant is weighed. Place the solvent in the second container, weigh the solvent of the remaining amount of the formula for the third time, and place it in the third container;

[0078] Step B, adding the nonylphenol polyether phosphate and the solvent in the first container into the first reaction...

Embodiment 3

[0082] A kind of water-based soldering flux of the present invention comprises the raw material of following mass percentage:

[0083]

[0084] Wherein, the antioxidant is a mixture of a phosphite antioxidant and a hindered phenolic antioxidant in a mass ratio of 1:1.

[0085] Preferably, the phosphite antioxidant is trioctyl, and the hindered phenol antioxidant is 2,6-di-tert-butyl-4-methylphenol.

[0086] A preparation method of water-based flux, comprising the following processing steps:

[0087] Step A. Accurately weigh the amount of materials according to the formula, and place them in different containers;

[0088] Among them, when weighing the solvent, it is weighed three times. For the first time, the solvent equal to the mass of nonylphenol polyether phosphate is weighed and placed in the first container. The second time, the solvent equal to the mass of the surfactant is weighed. Place the solvent in the second container, weigh the solvent of the remaining amoun...