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A kind of rosin for soldering flux and its preparation method and application

A technology of flux and rosin, used in welding equipment, manufacturing tools, welding media, etc., can solve the problems of easy decomposition of rosin, irregular solder joints, uneven film formation, etc., to achieve good thermal stability, full solder joints, Good film forming effect

Active Publication Date: 2020-06-30
广东科茂林产化工股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the fluxing activity of rosin, the existing technology also uses rosin to add unsaturated carboxylic acid to prepare rosin, but this kind of rosin is easy to decompose at high temperature, resulting in uneven film formation and irregular solder joints

Method used

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  • A kind of rosin for soldering flux and its preparation method and application
  • A kind of rosin for soldering flux and its preparation method and application
  • A kind of rosin for soldering flux and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A kind of embodiment of rosin for soldering flux of the present invention, the rosin for soldering flux described in this embodiment is made up of the component of following mass percent: Laudanane type resin dibasic acid 12.0%, abietic acid 2.28%, dehydroabietic acid Acid 10.31%, dihydroabietic acid 57.3%, tetrahydroabietic acid 18.11%.

[0030] The composition of the above-mentioned rosin for soldering flux was analyzed by gas chromatography, and the softening point was 85.0° C. and the acid value was 175.0 mg KOH / g as measured by ring and ball method.

[0031] The preparation method of rosin for soldering flux described in the present embodiment is:

[0032] (1) Distillation: Weigh 700 grams of Nanya pine rosin, crush it and put it into a distillation bottle, and add tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester 0.7 g, vacuumize, heat to 240°C, observe the ratio of the distilled matter in the receiving bottle with a marked scale,...

Embodiment 2

[0035] A kind of embodiment of the rosin for soldering flux of the present invention, the rosin for soldering flux described in this embodiment is made up of the component of following mass percent: Laudanane type resin dibasic acid 15.82%, abietic acid 2.33%, dehydroabietic acid Acid 10.66%, dihydroabietic acid 53.21%, tetrahydroabietic acid 17.98%.

[0036] The composition of the above-mentioned rosin for soldering flux is obtained by gas chromatography analysis, and its softening point is 92° C., and its acid value is 193.7 mg KOH / g as measured by ring and ball method.

[0037] The preparation method of rosin for soldering flux described in the present embodiment is:

[0038] (1) Distillation: Weigh 700 grams of Nanya pine rosin, crush it and put it into a distillation bottle, and add tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester 0.7 grams, vacuumize, heat to 243 ° C, observe the proportion of the distillate according to the receiving b...

Embodiment 3

[0041] A kind of embodiment of the rosin for soldering flux of the present invention, the rosin for soldering flux described in this embodiment is made up of the component of following mass percent: Laudanane type resin dibasic acid 18.31%, abietic acid 2.5%, dehydroabietic acid Acid 12.51%, dihydroabietic acid 51.35%, tetrahydroabietic acid 15.33%.

[0042] The composition of the above-mentioned rosin for soldering flux was analyzed by gas chromatography, and the softening point was 98° C., and the acid value was 201 mg KOH / g as measured by the ring and ball method.

[0043] The preparation method of rosin for soldering flux described in the present embodiment is:

[0044] (1) Distillation: Weigh 700 grams of Nanya pine rosin, crush it and put it into a distillation bottle. Observing the distillate ratio in the receiving bottle with a good scale, distilling until the mass percentage of nanya pine acid in the residue in the distillation bottle is 19%, stop the distillation an...

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Abstract

The invention relates to rosin for flux, a preparation method and application, and belongs to the field of basic resin for flux. The rosin for soldering flux of the present invention is prepared by using the rosin containing nanasinic acid as a raw material. The rosin for flux of the present invention has excellent solubility and anti-crystallization performance in the flux solvent system, has high flux activity and low corrosiveness, and has good wetting performance for lead-free solder; and has good thermal stability, Good film formation, the formed solder joints are full, bright and regular.

Description

technical field [0001] The invention relates to a basic resin for soldering flux, in particular to a rosin for soldering flux, its preparation method and application. Background technique [0002] Rosin is a natural resource, and rosin and its prepared resin are important chemical raw materials, which are widely used in the fields of ink, coating, adhesive and electronics. [0003] Rosin is a mixture of resin acids with similar structures, containing double bonds and carboxyl groups. People have used these groups of rosin to modify them in order to broaden their application. [0004] In the electronic product industry, rosin has been widely used as the basic resin for soldering flux. Chinese patent, special-grade modified rosin and process for the electronic industry, publication number CN1065474A, discloses a kind of electronic rosin, namely refined rosin, refined hydrogenated rosin, alcohol Soluble maleated rosin glyceride and polymerized rosin are compounded to meet the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09F1/02C09F1/04B23K35/362B23K35/363
CPCB23K35/362C09F1/02C09F1/04
Inventor 陈就记徐社阳曾昭君范斌
Owner 广东科茂林产化工股份有限公司
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