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New use of 4-(4-mothyl-n-amyl) cyclohexane-1,2-diacid anhydride

A technology of methyl n-pentyl and cyclohexane, which is applied to the assembly of printed circuits, welding media, welding/cutting media/materials, etc. of electrical components, and can solve the problem of increased solder composition, complex additive structure, and complex composition, etc. problem, to achieve the effect of less residue, high soldering activity, and easy synthesis

Inactive Publication Date: 2008-09-17
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, up to now, the purposes of relevant monoterpene derivative 4-(4'-methyl n-pentyl)-cyclohexane-1,2-dioic anhydride have not been reported

Method used

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  • New use of 4-(4-mothyl-n-amyl) cyclohexane-1,2-diacid anhydride
  • New use of 4-(4-mothyl-n-amyl) cyclohexane-1,2-diacid anhydride

Examples

Experimental program
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Effect test

preparation example Construction

[0014] The specific preparation method is: using β-myrcene and maleic anhydride as raw materials, under heating conditions, after adding β-myrcene dropwise to maleic anhydride, carry out intermolecular Diels-Alder (Diels Alder) at the same temperature. -Alder) cycloaddition reaction at first obtains 4-(4'-methyl-3'-pentenyl)-4-cyclohexene-1,2-dioic anhydride cycloaddition product, then, it is dissolved in acetic acid In ethyl ester, with 5% Pd / C as catalyst, at room temperature and 1-5kg / cm 2 The hydrogenation reaction is carried out under hydrogen pressure to obtain the target 4-(4'-methyl-n-pentyl)-cyclohexane-1,2-dioic anhydride, whose structural feature is a cyclic monoterpene derivative with an anhydride functional group. After the hydrogenation reaction is completed, the catalyst, solvent and low boiling point components are removed to obtain the crude product, and the high-purity target product can be obtained by recrystallization method, and the welding activity test i...

Embodiment 1

[0018] Embodiment 1 (raw material 4-(4'-methyl-3'-pentenyl)-4-cyclohexene-1, the preparation of 2-dioic anhydride)

[0019] 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 the same temperature for 4 hours. The lower fraction at 155-160°C / 3mmHg was collected by vacuum distillation to obtain the cycloaddition product 4-(4'-methyl-3'-pentenyl)-4-cyclohexene-1,2-dianhydride, which was analyzed by NMR Resonance determines structure.

Embodiment 2

[0020] Embodiment 2 (hydrogenation reaction)

[0021] The cycloaddition product 4-(4'-methyl-3'-pentenyl)-4-cyclohexene-1,2-dioic anhydride 32g obtained in Example 1 was dissolved in 97ml ethyl acetate, and the The ethyl acetate solution was added into the autoclave, and then 1.6 g of 5% Pd / C catalyst was weighed and added to the autoclave. After replacing the air in the kettle with hydrogen, fill the hydrogen to 5kg / cm 2 Then start the stirrer to adjust the stirring speed to 500rpm, the reaction starts immediately, the reactant starts to absorb hydrogen, and the hydrogen pressure drops. When the hydrogen pressure drops to 1kg / cm 2 Supplement hydrogen to 5kg / cm 2 , and repeat this operation. After the hydrogen absorption stopped, the catalyst was removed with a filter aid, and the solvent was evaporated with a rotary evaporator to obtain a crude hydrogenated product, which was used as solder A for the soldering test. Collect the fraction at 160-165°C / 1mmHg by vacuum disti...

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Abstract

An application of 4-(4-methyl n-pentyl)-cyclohexane-1,2-dioic acid anhydride in soldering electronic devices onto PCB is disclosed. Said solder is prepared from beta-laurene and maleic acid anhydride through. Diels-Alder cycloaddition reaction and hydrogenating.

Description

Technical field: [0001] The invention relates to a new application of 4-(4'-methyl-n-pentyl)-cyclohexane-1,2-dianhydride, which can be used as a new type of soldering agent for soldering of electronic components in the production process of electronic products In the process. 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 electronic components will ...

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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