A multifunctional semi-white bright tin plating additive

Abstract

The invention provides a multi-functional half-white brightness tin-plated additive which comprises the following components in parts by weight: 0.1-3 parts of a main brightener, 5-15 parts of a dispersing agent, 0.1-3 parts of a stabilizing agent, 0.1-2 parts of a leveling agent, 0.1-3 parts of a change agent, 0.1-2 parts of a low-foam wetting agent, 1-5 parts of an anti-crystal whisker agent, 0.05-0.5 part of a flocculating agent, 40-55 parts of an aqueous organic solvent, 0.1-2 parts of a functional auxiliary, 0.1-2 parts of acid and 25-40 parts of water. The multi-functional half-white brightness tin-plated additive has good dispersive capacity and coverage capacity, can enable the plating layer thickness to reach 3 micrometers or more, is fine, smooth and compact in crystal grains and has high bonding strength with a matrix; according to the multi-functional half-white brightness tin-plated additive, the performance of a plating layer can be obviously improved, the cost of a plating solution is low, and the electroplating liquid has wide operating temperature range and cathode current density range; the tin plating layer is compact is surface structure, high in white brightness and strong in bonding strength and has excellent weldability and oxidation resistance.

Description

technical field

[0001] The invention belongs to the technical field of tin plating, and in particular relates to a multifunctional semi-white tin plating additive. Background technique

[0002] Electroplated tin has the advantages of low toxicity, good environmental performance, fast deposition speed, high current efficiency and good corrosion resistance, and has gradually been popularized and applied at home and abroad. The traditional electroplating tin system has disadvantages such as low current efficiency, poor stability, high corrosion to equipment, and difficult treatment of plating solution. Therefore, it is necessary to add electroplating additives to solve this problem.

[0003] Tin plating additives are defined as leveling agent, positioning agent, brightener, grain refiner, stabilizer, wetting agent, impurity remover, anti-scorch agent, etc. due to different functions. Additives affect the nucleation of grains, and can play a role in bright coating, grain refine...

Examples

Embodiment 1

[0043] A multifunctional semi-white bright tin plating additive formulated from the following raw materials:

[0044] 15 parts of methanol, 35 parts of dipropylene glycol methyl ether, 0.5 parts of formaldehyde, 10 parts of 2-naphthol polyoxyethylene (12) ether, 2.5 parts of hydroquinone, 2.5 parts of gelatin, 0.5 parts of sodium isooctyl sulfate, quercetin 0.2 parts of diaminodiphenylmethane, 0.1 parts of diaminodiphenylmethane, 0.1 parts of diethylenetriaminepentaacetic acid, 0.05 parts of hydroxylamine sulfate, 1 part of methanesulfonic acid, 0.05 parts of polyethyleneimine, 32.5 parts of deionized water

[0045] test:

[0046] The pre-prepared Example 1 was slowly added to the base liquid of stannous methanesulfonate under stirring condition, the addition amount was 2-4mL / L, after stirring evenly, the Hull cell test was used.

[0047] Hull cell conditions: θ is 45°, current 1A, temperature 38-45°C, time 45-85 seconds

[0048] Test Results:

[0049] Hass sheet result sho...

Embodiment example 2

[0053] A multifunctional semi-white bright tin plating additive formulated from the following raw materials:

[0054] 8 parts of isopropanol, 40 parts of diethylene glycol butyl ether, 0.2 parts of 2-naphthaldehyde, 12 parts of bisphenol A polyoxyethylene (15) ether, 2 parts of resorcinol, 1.5 parts of gelatin, sulfosuccinic acid 1 part of sodium salt of dibutyl ester, 0.3 part of basic yellow, 0.1 part of diaminodiphenylmethane, 0.1 part of ethylenediaminetetraacetic acid, 0.1% of hydrazine hydrate, 0.8 part of methanesulfonic acid, 0.05 part of polyacrylamide, deionized 33.85 parts of water.

[0055] test:

[0056] Slowly add the pre-prepared multi-functional semi-white bright tin plating additive into the base liquid of stannous methanesulfonate under stirring condition, the addition amount is 2-4mL / L, after stirring evenly, use the Hull cell test .

[0057] Hull cell conditions: θ is 45°, current is 1A, temperature is 38-45°C, time is 45-85 seconds.

[0058] Test Resul...

Embodiment example 3

[0062] A multifunctional semi-white bright tin plating additive formulated from the following raw materials:

[0063] 12 parts of isopropanol, 33.5 parts of dipropylene glycol methyl ether, 0.5 parts of formaldehyde, 5 parts of bisphenol A polyoxyethylene (15) ether, 8 parts of nonylphenol polyoxyethylene (10) ether, 2.5 parts of catechol, 0.5 parts of gelatin, 0.3 parts of pyridine-modified quaternary ammonium salts, 0.1 parts of diaminodiphenylmethane, 0.1 parts of ethylenediaminetetraacetic acid, 0.1 parts of sodium hypophosphite, 0.8 parts of methanesulfonic acid, 0.05 parts of polyacrylamide, deionized 36.55 parts of water.

[0064] test:

[0065] Slowly add the pre-prepared additive to the base liquid of stannous methanesulfonate under stirring condition, the addition amount is 2-4mL / L, after stirring evenly, use the Hull cell test.

[0066] Hull cell conditions: θ is 45°, current 1A, temperature 38-45°C, time 45-85 seconds

[0067] Test Results:

[0068] The results...

technical field

[0001] The invention belongs to the technical field of tin plating, and in particular relates to a multifunctional semi-white tin plating additive. Background technique

[0002] Electroplated tin has the advantages of low toxicity, good environmental performance, fast deposition speed, high current efficiency and good corrosion resistance, and has gradually been popularized and applied at home and abroad. The traditional electroplating tin system has disadvantages such as low current efficiency, poor stability, high corrosion to equipment, and difficult treatment of plating solution. Therefore, it is necessary to add electroplating additives to solve this problem.

[0003] Tin plating additives are defined as leveling agent, positioning agent, brightener, grain refiner, stabilizer, wetting agent, impurity remover, anti-scorch agent, etc. due to different functions. Additives affect the nucleation of grains, and can play a role in bright coating, grain refine...

Examples

Embodiment 1

[0043] A multifunctional semi-white bright tin plating additive formulated from the following raw materials:

[0044] 15 parts of methanol, 35 parts of dipropylene glycol methyl ether, 0.5 parts of formaldehyde, 10 parts of 2-naphthol polyoxyethylene (12) ether, 2.5 parts of hydroquinone, 2.5 parts of gelatin, 0.5 parts of sodium isooctyl sulfate, quercetin 0.2 parts of diaminodiphenylmethane, 0.1 parts of diaminodiphenylmethane, 0.1 parts of diethylenetriaminepentaacetic acid, 0.05 parts of hydroxylamine sulfate, 1 part of methanesulfonic acid, 0.05 parts of polyethyleneimine, 32.5 parts of deionized water

[0045] test:

[0046] The pre-prepared Example 1 was slowly added to the base liquid of stannous methanesulfonate under stirring condition, the addition amount was 2-4mL / L, after stirring evenly, the Hull cell test was used.

[0047] Hull cell conditions: θ is 45°, current 1A, temperature 38-45°C, time 45-85 seconds

[0048] Test Results:

[0049] Hass sheet result sho...

Embodiment example 2

[0053] A multifunctional semi-white bright tin plating additive formulated from the following raw materials:

[0054] 8 parts of isopropanol, 40 parts of diethylene glycol butyl ether, 0.2 parts of 2-naphthaldehyde, 12 parts of bisphenol A polyoxyethylene (15) ether, 2 parts of resorcinol, 1.5 parts of gelatin, sulfosuccinic acid 1 part of sodium salt of dibutyl ester, 0.3 part of basic yellow, 0.1 part of diaminodiphenylmethane, 0.1 part of ethylenediaminetetraacetic acid, 0.1% of hydrazine hydrate, 0.8 part of methanesulfonic acid, 0.05 part of polyacrylamide, deionized 33.85 parts of water.

[0055] test:

[0056] Slowly add the pre-prepared multi-functional semi-white bright tin plating additive into the base liquid of stannous methanesulfonate under stirring condition, the addition amount is 2-4mL / L, after stirring evenly, use the Hull cell test .

[0057] Hull cell conditions: θ is 45°, current is 1A, temperature is 38-45°C, time is 45-85 seconds.

[0058] Test Resul...

Embodiment example 3

[0062] A multifunctional semi-white bright tin plating additive formulated from the following raw materials:

[0063] 12 parts of isopropanol, 33.5 parts of dipropylene glycol methyl ether, 0.5 parts of formaldehyde, 5 parts of bisphenol A polyoxyethylene (15) ether, 8 parts of nonylphenol polyoxyethylene (10) ether, 2.5 parts of catechol, 0.5 parts of gelatin, 0.3 parts of pyridine-modified quaternary ammonium salts, 0.1 parts of diaminodiphenylmethane, 0.1 parts of ethylenediaminetetraacetic acid, 0.1 parts of sodium hypophosphite, 0.8 parts of methanesulfonic acid, 0.05 parts of polyacrylamide, deionized 36.55 parts of water.

[0064] test:

[0065] Slowly add the pre-prepared additive to the base liquid of stannous methanesulfonate under stirring condition, the addition amount is 2-4mL / L, after stirring evenly, use the Hull cell test.

[0066] Hull cell conditions: θ is 45°, current 1A, temperature 38-45°C, time 45-85 seconds

[0067] Test Results:

[0068] The results...

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