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A kind of thiophene derivative and its synthesis method and application

A technology of thiophene derivatives and synthesis methods, applied in organic chemistry, coating and other directions, can solve problems such as easy yellowing and aging, and achieve the effect of strong anti-yellowing ability

Active Publication Date: 2022-05-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PVDC emulsions and composites coated with PVDC emulsions have the problem of easy yellowing and aging under long-term sunlight, so it is necessary to study suitable additives to further improve the performance of PVDC emulsions and PVDC composites

Method used

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  • A kind of thiophene derivative and its synthesis method and application
  • A kind of thiophene derivative and its synthesis method and application
  • A kind of thiophene derivative and its synthesis method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The preparation process of the new thiophene derivative E2SBFE2 of the present invention is:

[0036] (1) Add 20 g of 3,4-ethylenedioxythiophene to 500 ml of ultra-dry dichloromethane under nitrogen atmosphere, place it in a 0°C environment, and dropwise add 70 ml of 2.4 mol / methylene chloride to the resulting solution. L of n-butyllithium n-hexane solution, continue to stir for 1 hour and then add 50 grams of tributyltin chloride dropwise to it, stir for 1 hour, take it out from the 0 ℃ environment and place it at room temperature and continue to stir for 12 Hour. After the reaction was completed, 600 mL of dichloromethane and 600 mL of saturated sodium chloride solution were added to the obtained 600 mL solution, extracted 3 times, the obtained organic phases were combined, 20 g of anhydrous sodium sulfate was added thereto, stirred for 30 minutes, and dried. After completion, suction was carried out. Filter, remove the sodium sulfate, add 40g silica gel powder to th...

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Abstract

The invention discloses a thiophene derivative (E2SBFE2) as shown in formula 1, 2,7-bis(2,2',3,3'-tetrahydro-5,5'-dithieno[3,4- b][1,4]dioxane)-9,9'-spirobifluorene and its synthesis method and its application as a polymer emulsion additive; E2SBFE2 can be used as an additive to compound with PVDC emulsion to prepare composite emulsion E2SBFE2@PVDC , the composite emulsion is especially suitable for coating on PVC and other hard sheets to make composite hard sheets, and has the advantage of strong anti-yellowing ability;

Description

technical field [0001] The present invention relates to a novel thiophene derivative 2,7-bis(2,2',3,3'-tetrahydro-5,5'-dithieno[3,4-b][1,4]bis Oxane)-9,9'-spirobifluorene and its synthesis and its application as polymer emulsion additive. Background technique [0002] Polyvinylidene chloride (PVDC) has a linear polymer chain structure connected head to tail. The chlorine atom in its molecule is hydrophobic and cannot form hydrogen bonds. It can effectively block water vapor and oxygen. It is currently the best comprehensive barrier property. Packaging materials, widely used in food cling film, pharmaceutical packaging materials and other packaging fields. However, both PVDC emulsions and PVDC emulsion-coated composites are prone to yellowing and aging under long-term sunlight exposure. Therefore, it is necessary to study suitable additives to further improve the performance of PVDC emulsions and PVDC composites. SUMMARY OF THE INVENTION [0003] The present invention pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D519/00C08K5/45C08L27/08C09D127/08C09D7/48
CPCC07D519/00C08K5/45C09D127/08C09D7/48C08L27/08
Inventor 吕耀康沈熠瑶蔡志威蒯羽
Owner ZHEJIANG UNIV OF TECH
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