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Thiophene derivative as well as synthesis method and application thereof

A technology of thiophene derivatives and synthesis methods, which is applied in coatings, organic chemistry, etc., can solve the problems of easy yellowing and aging, and achieve the effect of strong anti-yellowing ability

Active Publication Date: 2021-06-11
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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  • Thiophene derivative as well as synthesis method and application thereof
  • Thiophene derivative as well as synthesis method and application thereof
  • Thiophene derivative as well as synthesis method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0036] (1) Add 20 grams of 3,4-ethylenedioxythiophene to 500 milliliters of ultra-dry dichloromethane under a nitrogen atmosphere, and place it at 0°C, and add 70 milliliters of 2.4 mol / L of n-butyllithium n-hexane solution, continue to stir for 1 hour, then add 50 grams of tributyltin chloride dropwise therein, and after stirring for 1 hour, take it out from the 0°C environment and place it at room temperature to continue stirring for 12 Hour. Add 600mL of dichloromethane and 600mL saturated sodium chloride solution to the obtained 600mL solution after the reaction, extract 3 times, combine the obtained organic phases, add 20g of anhydrous sodium sulfate therein and stir for 30 minutes to dry, and then extract Filter to remove sodium sulfate therein, add 40g of silica gel powder to the dried organic phase and remove the organic solution using a rotary evaporator, the resulting ...

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Abstract

The invention discloses a thiophene derivative (E2SBFE2) as shown in a formula 1, 2,7-bis(2,2',3,3'-tetrahydro-5,5'-dithieno[3,4-b][1,4]dioxene)-9,9'-spirobifluorene, a synthetic method of the thiophene derivative and application of the thiophene derivative as a polymer emulsion additive. The E2SBFE2 can be used as an additive to be compounded with a PVDC emulsion to prepare a composite emulsion E2SBFE2-coated PVDC, and the composite emulsion is particularly suitable for being smeared on hard sheets such as PVC and the like to prepare composite hard sheets and has the advantage of high yellowing resistance.

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 Oxine)-9,9'-spirobifluorene, its synthesis method and its application as a polymer emulsion additive. Background technique [0002] Polyvinylidene chloride (PVDC) has a linear polymer chain structure connected head to tail. The chlorine atoms in its molecule are hydrophobic and cannot form hydrogen bonds. It can effectively block water vapor and oxygen. It is currently the best comprehensive barrier performance. Packaging materials are widely used in packaging fields such as food preservation film and pharmaceutical packaging materials. However, PVDC emulsions and PVDC emulsion-coated composites 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. Contents of the invention [0003] The present ...

Claims

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Application Information

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Patent Type & Authority Applications(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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