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Novel purpose of 4-(4-methyl-3-pentenyl)-4-cyclohexene-1, 2-diacid anhydride

A technology based on pentenyl and cyclohexene, which is applied in the field of 4--4-cyclohexene-1, can solve the problems of increased solder composition, complex additive structure, and complicated composition, and achieves less residue, easy cleaning, Compositing Easy Effects

Inactive Publication Date: 2008-03-26
HARBIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although all have been improved, there are problems such as increasing the solder composition, complicating the composition, increasing the cost, or complicating the structure of the additive and making it difficult to synthesize.
On the other hand, the use of monoterpene derivative 4-(4'-methyl-3'-pentenyl)-4-cyclohexene-1,2-dioic anhydride is extremely limited, so far, except for reports that it has In addition to the insecticidal effect, no other uses have been found

Method used

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Experimental program
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Effect test

preparation example Construction

[0012] The specific preparation method is: use monoterpene compound β-myrcene and maleic anhydride as raw materials, add β-myrcene to maleic anhydride under heating conditions, and carry out intermolecular Diels-Al at the same temperature. De (Diels-Alder) cycloaddition reaction. The product was obtained by vacuum distillation to collect the fraction at 155-160°C / 3mmHg. After the reaction, the reaction crude product and the vacuum distillation product were respectively used as soldering agents for soldering activity test.

[0013] β-myrcene as a raw material is an important fragrance and the basic raw material for synthetic fragrances. It can be easily prepared in large quantities from β-pinene, one of the main components of turpentine oil.

[0014] Welding activity test

[0015] The welding activity test follows the method stipulated in JIS-Z-3197 in Japan. The expansion rate of the solder is measured on the copper plate when the new solder is used. Compared with the refere...

Embodiment 1

[0016] Embodiment 1 (4-(4' methyl-3'-pentenyl)-4-cyclohexene-1, the preparation of 2-dioic anhydride)

[0017] In a four-neck flask equipped with a thermometer, a dropping funnel, a mechanical stirrer, and a condenser, add maleic anhydride (calculated as 1.0 times the mole of β-myrcene) and heat to dissolve the maleic anhydride, controlled at 65- At 70°C, β-myrcene (75% content of β-myrcene) was added dropwise from the dropping funnel. After dropping, react at 65-70°C for 4 hours, and distill off the low boiling point components to obtain the crude product as solder A for soldering test. Collect the fraction at 155-160°C / 3mmHg by distillation under reduced pressure to obtain the product 4-(4'-methyl-3'-pentenyl)-4-cyclohexene-1,2-dioic anhydride. The structure is determined by nuclear magnetic resonance , as solder B for welding tests.

Embodiment 2

[0018] Embodiment 2 (welding activity measurement)

[0019] The soldering activity test follows the method specified in JIS-Z-3197 in Japan, using H60A type solder with a diameter of 1.6mm, and rosin as a comparative substance for measurement.

[0020] The 20mm*20mm*0.3mm copper plate was cleaned with isopropanol and heated and oxidized at 150°C for 1 hour. Weigh 0.250mg±0.01 solder and roll it into a circle shape and put it on the copper plate, put the flux sample to be measured in the center of the circular solder, the sample weight is 25mg±5, put the above copper plate on the heating plate, and control the heating for 4 minutes To 200 ℃, cut off the power, after cooling, use monoterpenes such as limonene, pinene, etc. as a solvent to wash the copper plate to remove, measure the thickness and diameter of the solder after expansion, and calculate the expansion rate of the solder with the following formula, the greater the expansion rate value Means the higher the activity of...

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Abstract

The invention relates to an annular monoterpene derivative used as new bonding glue. The annular monoterpene derivative 4-4- cyclohexene -1,2-biacidic can bond the electric unit on the copperplate, and has high active welding property, leaves little draff, needs only low temperature, and is easy to wash. The active component is annular monoterpene derivative that has acid anhydride, and is made from Beta-myrcene and maleic anhydride through Diels-Alder molecule cycloaddition reaction. It can be used for welding the electric units on circuit board with soldering tin and production of other electric unit needing bonding electric unit.

Description

Technical field: [0001] The invention relates to a new application of 4-(4'-methyl-3'-pentenyl)-4-cyclohexene-1,2-dioic anhydride, which can be used in the production process of electronic products as a new soldering agent In soldering processes that require soldering of electronic components. Background technique: [0002] In order to fix electronic components to circuit boards during the production of electronic products, solder is indispensable. Rosin is a well-known common soldering agent. The big disadvantage of rosin is that it is easy to leave a lot of residue after welding. These residues not only cause poor conductivity but also become an inspection obstacle in the automatic inspection process. The residue must be removed. Solvents, however, have been limited in use due to the environmental damage of halogen-based solvents. In addition, heating is essential during the soldering process. Applying high temperature to highly densely arranged high-precision electroni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/89B23K35/36H05K3/34
Inventor 陆占国李健韩毓杰
Owner HARBIN UNIV OF COMMERCE
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