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Rosin derivate for soldering flux and preparation method

A technology for rosin derivatives and flux, which is applied in the field of rosin derivatives for flux and its preparation, can solve the problems of poor solvent solubility, high preparation cost, poor thermal stability, etc. good film effect

Active Publication Date: 2015-05-13
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a rosin derivative for soldering flux and its preparation method, which overcomes the low activity, poor thermal stability, easy crystallization, poor solvent solubility and high preparation cost of electronic rosin products in the prior art. , environmental pollution and other disadvantages

Method used

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  • Rosin derivate for soldering flux and preparation method
  • Rosin derivate for soldering flux and preparation method
  • Rosin derivate for soldering flux and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step, reduction: Take 10g of dehydroabietic acid, dissolve it in 20g of anhydrous tetrahydrofuran, slowly add 2.7g of lithium aluminum hydride at 0°C, return to room temperature after the addition, and heat to reflux for 1h, then cool to 0°C , slowly drop 50g of 20% H under stirring 2 SO 4 The solution was extracted 3 times with ethyl acetate, the ethyl acetate layer was collected, and the solvent was recovered by distillation under reduced pressure to obtain dehydroabietyl alcohol with a yield of 97% and a GC content of 97%;

[0032] The second step, esterification: take 10g of dehydroabietyl alcohol, dissolve it in 15g of tetrahydrofuran, add 3.9g of succinic anhydride, 0.01g of anhydrous sodium acetate in turn, stir and reflux for 4 hours, and recover the solvent by distillation under reduced pressure to obtain dehydroabietyl alcohol. Hydroabietyl Succinate Monoester.

[0033] Depend on figure 1 It can be seen from the infrared characteristic absorption ...

Embodiment 2

[0037] The first step, reduction: Take 10g of dehydroabietic acid, dissolve it in 30g of anhydrous tetrahydrofuran, slowly add 3g of lithium aluminum hydride at 2°C, return to room temperature after the addition, and heat to reflux for 0.8h, then cool to 2°C , slowly dropwise added 60g of 15% H under stirring 2 SO 4 The solution was extracted 3 times with ethyl acetate, the ethyl acetate layer was collected, and the solvent was recovered by distillation under reduced pressure to obtain dehydroabietyl alcohol with a yield of 96% and a GC content of 98%;

[0038] The second step, esterification: take 10g of dehydroabietyl alcohol, dissolve it in 17g of tetrahydrofuran, add 4g of succinic anhydride, 0.02g of anhydrous sodium acetate in turn, reflux under stirring for 5 hours, and recover the solvent by distillation under reduced pressure to obtain dehydrogenation Abityl Succinate Monoester. Gained spectrum feature is identical with embodiment 1 spectrum, in order to avoid dupli...

Embodiment 3

[0040] The first step, reduction: Take 10g of dehydroabietic acid, dissolve it in 40g of anhydrous tetrahydrofuran, slowly add 3.8g of lithium aluminum hydride at -1°C, return to room temperature after the addition, and heat to reflux for 1.2h, then cool to -1°C, slowly drop 65g of 12% H under stirring 2 SO 4 The solution was extracted 3 times with ethyl acetate, the ethyl acetate layer was collected, and the solvent was recovered by distillation under reduced pressure to obtain dehydroabietyl alcohol with a yield of 98% and a GC content of 97%;

[0041] The second step, esterification: take 10g of dehydroabietyl alcohol, dissolve it in 20g of tetrahydrofuran, add 4.2g of succinic anhydride, 0.03g of anhydrous sodium acetate in turn, reflux under stirring for 6 hours, and recover the solvent by distillation under reduced pressure to obtain dehydroabietyl alcohol. Hydroabietyl Succinate Monoester. Gained spectrum feature is identical with embodiment 1 spectrum, in order to av...

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Abstract

The invention discloses a rosin derivate for soldering flux and a preparation method. The molecular structural formula of the rosin derivate for soldering flux sees the specification, wherein n is 3 or 4. The rosin derivate for soldering flux has a good solubleness with a solvent, and is free of crystallizing, high in film-forming property, outstanding in heat stability, high in performance for wetting lead-free solder, and high in soldering flux activity; when in use, a halogen activator is not needed to be added; the thermal stability is high, and degrading and carbonizing at high temperature can be avoided; the mobility and heat conductivity at high temperature are high; the formed welding points are regular and free of bubble, concave pits and other poor welding phenomena; in addition, the corrosion after welding is small; the preparation cost is low, and no pollution is generated.

Description

technical field [0001] The invention belongs to the field of synthetic materials, and in particular relates to a rosin derivative for soldering flux and a preparation method thereof. Background technique [0002] Rosin is a natural resin with tricyclic diterpene resin acid as the main component. It is solid at room temperature, has good electrical insulation, and low corrosion. It can exhibit certain acidity and film-forming properties at welding temperatures. It can effectively remove oxides, oil stains, dust and other solder resists on the surface of the metal to be welded, and protect the solder joints from being oxidized again, and at the same time promote heat transfer during the welding process, so that the welding can proceed smoothly. With the implementation of lead-free electronic products, lead-containing solder has been gradually replaced by lead-free solder. Compared with lead-containing solder, lead-free solder has the characteristics of high melting point and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/40C07C69/42
CPCC07C29/147C07C29/74C07C67/08C07C69/40C07C69/42C07C2603/26C07C35/42
Inventor 商士斌齐帆沈明贵高宏宋杰宋湛谦
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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