Preparation method of easy-to-store and halogen-free scaling powder

A technology for flux and preparation steps, which is applied in the field of preparation of easy-to-preserve halogen-free flux, can solve the problems of flux not easy to store for a long time, poor wettability, black solder joints, etc., and achieve good flux wettability, Less corrosive, bright and plump welding spot

Inactive Publication Date: 2017-02-22
CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: aiming at the problem that the existing soldering flux will remain on the substrate after use, it is not easy to clean, and at the same time, the wettability is poor, the solder joints are prone to blackening after soldering, and the soldering flux is not easy to store for a long time. Provide a kind of preparation method of easy-to-preserve halogen-free flux, the method first uses succinic acid, adipic acid, itaconic acid, triisopropanolamine as the core material, and acrylic resin BS965M as the shell material to prepare microcapsules activating agent, and then crush the loofah obtained from loofah treatment, mix and filter with deionized water to obtain loofah extract, then stir it with chitosan to obtain loofah antibacterial clear liquid, and finally microencapsulate The active agent reacts with nitroethane, sorbitol, emulsifier, etc. under stirring and heating, and after filtering to remove the filter residue, the easy-to-preserve halogen-free flux can be obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First measure 4mL succinic acid, 3mL adipic acid, 2mL itaconic acid, 1mL triisopropanolamine, add 40mL deionized water, heat to 55°C and stir at 300r / min for 15min, then add 25mL acrylic resin BS965M, Continue to raise the temperature to 90°C, and keep stirring for 3h, cool to room temperature, and then filter, put the filter residue in a drying oven, dry to constant weight at 105°C, add it to a mortar and grind it, and pass through a 60-mesh sieve to obtain Microencapsulated active agent, for subsequent use; then weigh 3kg loofah, remove the skin, then dry and remove the seeds to obtain loofah, add loofah to the pulverizer and pulverize, pass through a 60-mesh sieve, and weigh 80g of sieved loofah Mix the loofah powder with 0.8L deionized water, stir at 200r / min for 3 hours in a constant temperature water bath at 70°C, then filter, collect the filtrate, and obtain the loofah extract; then weigh 5g chitosan, add 500mL mass fraction In 1% acetic acid solution, stir at 30...

example 2

[0021]First measure 6mL succinic acid, 5mL adipic acid, 3mL itaconic acid, 1.5mL triisopropanolamine, add 50mL deionized water, heat to 58°C and stir at 350r / min for 18min, then add 37mL acrylic resin BS965M , continue to heat up to 93°C, and continue to stir for 3.5h, cool to room temperature, then filter, put the filter residue in a drying oven, dry to constant weight at 108°C, add it to a mortar and grind, pass through a 60-mesh sieve , to obtain microencapsulated active agent, for subsequent use; then take 4kg loofah, remove the outer skin, then dry and remove the seeds to obtain loofah, add loofah to the pulverizer and pulverize, cross 60 mesh sieves, weigh 90g after sieving Mix the loofah powder with 0.9L deionized water, stir in a constant temperature water bath at 73°C at 250r / min for 3.5h, then filter, collect the filtrate, and obtain the loofah extract; weigh 7g chitosan, add 550mL The mass fraction is 1% acetic acid solution, stir at 350r / min until the chitosan is c...

example 3

[0024] First measure 8mL succinic acid, 6mL adipic acid, 4mL itaconic acid, 2mL triisopropanolamine, add 60mL deionized water, heat to 60°C and stir at 400r / min for 20min, then add 50mL acrylic resin BS965M, Continue to raise the temperature to 95°C, and continue to stir for 4h, cool to room temperature, and then filter, put the filter residue in a drying oven, dry to constant weight at 110°C, add it to a mortar and grind it, and pass through a 60-mesh sieve to obtain Microencapsulated active agent, for subsequent use; then weigh 5kg loofah, remove the outer skin, then dry and remove the seeds to obtain loofah, add loofah to the pulverizer and pulverize, pass through a 60-mesh sieve, and weigh 100g of sieved loofah Mix the loofah powder with 1.0L deionized water, stir in a constant temperature water bath at 75°C at 300r / min for 4h, then filter, collect the filtrate, and obtain the loofah extract; then weigh 8g chitosan, add 600mL mass fraction In 1% acetic acid solution, stir ...

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PUM

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Abstract

The invention discloses a preparation method of easy-to-store and halogen-free scaling powder and belongs to the technical field of scaling powder preparation. The preparation method comprises the following steps: firstly, succinic acid, adipic acid, itaconic acid and triisopropanolamine serve as core materials and acrylic resin BS965M serves as a shell material to prepare a microencapsulation active agent; then, loofah sponge obtained through loofah treatment is smashed and mixed with deionized water, the mixture is filtered to obtain loofah sponge leach liquor, loofah sponge leach liquor and chitosan are stirred to obtain loofah sponge anti-microbial clear liquid; and finally, the microencapsulation active agent, nitroethane, sorbitol and an emulgator are reacted in a stirring and heating manner, filtering and filter residue removal are carried out to obtain the easy-to-store and halogen-free scaling powder. The easy-to-store and halogen-free scaling powder prepared through the preparation method disclosed by the invention is high in activity and easy to store; after being painted on the surface of a welded object, the easy-to-store and halogen-free scaling powder can clean the surface and improve the welding property; the easy-to-store and halogen-free scaling powder is better in wettability, does not have a dark spot and has less residue after being welded, effectively improves production efficiency of welding, and has broad application space.

Description

technical field [0001] The invention discloses a preparation method of an easy-to-preserve halogen-free flux, which belongs to the technical field of flux preparation. Background technique [0002] With the rapid development of the electronics industry and fierce competition in the market, solder manufacturers hope to produce products with excellent soldering performance and low price. As an auxiliary material of solder paste (mass fraction is 10-20%), flux can not only provide excellent soldering performance, but also directly affect the printing performance and storage life of solder paste. Therefore, the quality of flux directly affects the entire process and product quality of surface mount technology. [0003] Flux is usually a mixture of rosin as the main component, which is an auxiliary material to ensure the smooth progress of the soldering process. Welding is the main process in electronic assembly. Flux is an auxiliary material used in welding. The main function ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
CPCB23K35/362
Inventor 周丽花宋豪薛蕾
Owner CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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