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A kind of preparation method of bio-based epoxy resin

A technology based on epoxy resin and glycidyl methacrylate, applied in the field of preparation of bio-based epoxy resin, can solve unseen problems, and achieve the effects of low viscosity, wide source of raw materials and simple process

Inactive Publication Date: 2017-10-27
JIANGSU SUPLA BIOPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, there are no literature and patent reports that directly utilize polylactic acid to synthesize epoxy resin in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Add 20g PLA (8800) and 0.3g maleic anhydride to a 100ml three-necked flask, and control the reaction temperature to 120°C. 2 Reaction under atmosphere for 4h.

[0019] 2. Pass 2g of glycidyl methacrylate through a 200-mesh neutral alumina column, then add 0.5g of anhydrous magnesium sulfate to oscillate to absorb a small amount of water, filter, and stand for 10h; at 80°C and a vacuum of 50mmHg The filtrate was distilled under reduced pressure and stirred with a stirrer. The distillation time was 4h.

[0020] 3. Add the product obtained in step 1, 1.8g of glycidyl methacrylate, 62.4mg of zinc powder and 50ml of DMSO into a 100ml three-necked flask, and react at a constant temperature of 80°C for 10h under the action of magnetic stirring in a nitrogen atmosphere. .

[0021] 4. After the reaction, pour the reaction solution into 70ml of ethanol solution, and vigorously stir to precipitate the product, remove unreacted monomers at the same time, and finally dry the pr...

Embodiment 2

[0026] 1. Add 20g PLA (8800) and 0.28g maleic anhydride to a 100ml three-necked flask, and control the reaction temperature to 130°C. 2 Reaction under atmosphere for 3h.

[0027] 2. Pass 2g of glycidyl methacrylate through a 200-mesh neutral alumina column, then add 0.5g of anhydrous magnesium sulfate to oscillate to absorb a small amount of water, filter, and stand for 8 hours; at 80°C, the vacuum degree is 60mmHg The filtrate was distilled under reduced pressure under certain conditions, and stirred with a stirrer, and the distillation time was 4h.

[0028] 3. Add the product obtained in step 1, 1.6g of glycidyl methacrylate, 62.4mg of zinc powder and 50ml of DMSO into a 100ml three-neck flask, and react at a constant temperature of 80°C for 10h under the action of magnetic stirring in a nitrogen atmosphere. .

[0029] 4. After the reaction, pour the reaction solution into 70ml of ethanol solution, and vigorously stir to precipitate the product, remove unreacted monomers a...

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PUM

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Abstract

The invention relates to a preparation method of bio-based epoxy resin: using maleic anhydride to modify the end group of low-molecular-weight polylactic acid to obtain polylactic acid with carboxyl groups at both ends. Under the conditions of zinc powder as the catalyst and DMSO as the solvent, polylactic acid was modified by glycidyl methacrylate to introduce epoxy groups at both ends of the molecular chain of polylactic acid. Finally, the ring-opening of the epoxy group is initiated by adding an appropriate curing agent, thereby cross-linking into a three-dimensional network structure and curing. The process of the invention is simple, the polylactic acid is derived from crops such as corn and potatoes, and the source of raw materials is extensive, and it is beneficial to reduce the consumption of polymer materials on petroleum resources and the emission of CO2, and the obtained epoxy resin has lower viscosity and good viscosity. It can be used as the matrix of adhesives, coatings and composite materials, and is suitable for the molding process of various composite materials. Therefore, the invention has relatively broad application prospects.

Description

technical field [0001] The invention relates to a preparation method of epoxy resin, in particular to a preparation method of bio-based epoxy resin. Background technique [0002] Epoxy resin is a polymer oligomer containing two or more epoxy groups, with aliphatic or aromatic backbone, and can react with other active groups to form thermosetting products. Epoxy resin has a large number of active and polar groups. As a thermosetting resin, epoxy resin has excellent comprehensive properties, good adhesion, excellent mechanical properties, small curing shrinkage, good manufacturability, excellent Excellent electrical insulation performance and corrosion resistance performance are widely used in coatings, composite coatings, adhesives, electronic packaging materials, engineering plastics, civil engineering and construction materials and other fields. [0003] The application of epoxy resin is very extensive. The annual consumption of epoxy resin exceeds 1 million tons, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/32C08F290/06C08F220/32C08G63/91
Inventor 万里林育锋张简邦宏吴中仁
Owner JIANGSU SUPLA BIOPLASTICS CO LTD