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Epoxy resin based on vanillin and amino acid, and preparation method and application thereof

A technology for epoxy resin preparation and epoxy resin, which is applied in epoxy resin coatings, imino compound preparation, thiol preparation and other directions, can solve problems such as poor degradability and environmental pollution, achieve excellent mechanical properties and water resistance, Simple process and mild conditions

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of poor degradability of existing traditional plastics and easy to cause environmental pollution when used on a large scale, and to provide a new solution for the synthesis of environmentally friendly polymers from the perspective of sustainable raw materials, the primary purpose of the present invention is to provide a synthetically simple Epoxy resin based on vanillin and amino acid with sustainable raw materials, environmental protection and easy degradation and preparation method thereof

Method used

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  • Epoxy resin based on vanillin and amino acid, and preparation method and application thereof
  • Epoxy resin based on vanillin and amino acid, and preparation method and application thereof
  • Epoxy resin based on vanillin and amino acid, and preparation method and application thereof

Examples

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Embodiment 1

[0043] A kind of preparation method based on the epoxy resin of vanillin and amino acid, comprises the steps:

[0044]1) Synthesis of vanillinyl glycidyl ether: In terms of mass fraction, 1 part of benzyltriethylammonium chloride, 20 parts of vanillin, and 50 parts of epichlorohydrin were mixed, heated to 80 ° C for 2 hours, and then vacuum Suck off excess epichlorohydrin. After the epichlorohydrin is extracted, cool the reactant to 30°C, add 35 parts of 40% sodium hydroxide solution dropwise within 0.5h, and add 35 parts of water 10 minutes after the completion of the dropwise addition to dilute. After the addition was complete, the reaction was continued under these conditions for 1 h. After the reaction was completed, the product was filtered and washed 3 times with pure water. 19.3 parts of vanillinyl glycidyl ether were obtained, the yield was about 72%. The infrared spectrum of vanillin glycidyl ether is as follows figure 1 As shown, visible at 1690cm -1 There are o...

Embodiment 2

[0050] Solidify vanillin glycidyl ether and lysine in Example 1: Dissolve 2 parts of vanillin glycidyl ether in 2 parts of propylene glycol methyl ether in mass fraction, and then add 3.0 parts of lysine 50% alkaline aqueous solution (dissolved by adjusting the pH with triethylamine), heating the mixed system at 60°C for 2 hours to obtain a homogeneous solution system of the prepolymer, which can be used as a water-solvent resin.

[0051] Coat the above prepolymer solution on the tinplate, then enter the oven at 80°C / 2h, 100°C / 2h for drying and high-temperature curing treatment, and obtain a yellow transparent film after curing, with a dry film thickness of 20-30μm.

Embodiment 3

[0053] Solidify vanillin glycidyl ether and lysine in Example 1: Dissolve 2 parts of vanillin glycidyl ether in 2 parts of isopropanol in terms of mass fraction, and then add 1.5 parts of lysine 50% alkaline aqueous solution (adjust the pH by triethylamine to dissolve it) and 0.25 parts of diethylenetriamine, heat the mixed system at 50°C for 3 hours to obtain a homogeneous solution system of the prepolymer, which can be used as a water-solvent resin .

[0054] Coat the above prepolymer solution on the tinplate, then enter the oven at 80°C / 2h, 120°C / 2h for drying and high-temperature curing treatment, and obtain a yellow transparent film after curing, with a dry film thickness of 20-30μm.

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Abstract

The invention discloses epoxy resin based on vanillin and amino acid, and a preparation method and application thereof. The preparation method comprises the following steps: with vanillin, epoxy chloropropane and strong base as raw materials, converting phenolic hydroxyl groups of vanillin into glycidyl ether bonds to obtain vanillin-based glycidyl ether; and adding vanillin-based glycidyl ether,amino acid and polyamine into a mixed solvent system together, carrying out stirring until a homogeneous system is obtained, and conducting reacting at 25-80 DEG C for 1-4 hours to form the prepolymerepoxy resin based on vanillin and amino acid. According to the invention, two bio-based raw materials, namely vanillin and amino acid are used as main bodies, a cross-linked polymer with excellent mechanical properties can be prepared under simple synthesis conditions, and the resin has imine and ester structures, so the resin has good degradability. The route of the method has the advantages ofenvironment-friendly raw materials and simple synthesis process, and has potential in large-scale production.

Description

technical field [0001] The invention relates to epoxy resins, in particular to an epoxy resin based on vanillin and amino acids, a preparation method and application thereof. Background technique [0002] In recent years, more and more attention has been paid to ecological and environmental protection, and the issue of waste polymer pollution has continuously appeared in the field of vision of academia and even the public. Polymers such as polyethylene, polystyrene, polyacrylate, and traditional epoxy resins prepared based on petrochemical raw materials often do not have microorganisms or ecological conditions that can degrade such polymers in nature, so that after they are discarded The retention time in the environment is very long, which can reach dozens or even hundreds of years. These waste plastics will cause great harm to the environment, animals and plants, and humans themselves, and will bury unknown risks. For example, these waste plastics are easy to be eaten by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C319/12C07C323/58C07C249/02C07C251/24C08G59/28C09D163/00C08G59/50
CPCC07C249/02C07C251/24C07C319/12C07C323/58C08G59/28C08G59/5006C09D163/00
Inventor 张心亚莫锐彬
Owner SOUTH CHINA UNIV OF TECH
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