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Preparation method of hyper-branched bio-based epoxy resin

A technology based on epoxy resin and hyperbranched polyester is applied in the field of preparation of hyperbranched bio-based epoxy resin to achieve the effects of reducing CO2 emission, excellent performance and reducing the consumption of petroleum resources

Inactive Publication Date: 2016-03-30
JIANGSU SUPLA BIOPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] So far, there are no literature and patent reports on the introduction of polylactic acid into hyperbranched epoxy resins in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 7.2g of ethylene glycol, 20g of L-lactide and 0.10g of stannous chloride into a 100mL three-necked flask equipped with a thermometer and a stirrer, and react for 2 hours at 100KPa, 110°C, under the protection of argon;

[0024] (2) Add the polylactic acid that step (1) gained is equipped with in the there-necked flask of 100ml thermometer, stirrer and reflux condenser, and add 5.76g trimellitic anhydride and 60mlDMF, stir until trimellitic anhydride is all dissolved, heat up to 120°C, react for 3 hours, distill under reduced pressure, wash the precipitate with deionized water at 50°C, and dry in vacuum;

[0025] (3) Weigh 10 g of the solid obtained in step (2) and add 100 ml of a three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and add 2.12 g of trimellitic anhydride and 60 ml of DMF, then add 15 ml of water-carrying agent DMB and 0.5% The catalyst p-toluenesulfonic acid, control the temperature at 130 ° C, reflux under reduced p...

Embodiment 2

[0030] (1) Add 7.5g of ethylene glycol, 20g of L-lactide and 0.15g of stannous chloride into a 100mL three-necked flask equipped with a thermometer and a stirrer, and react at 100KPa, 120°C, under the protection of argon for 2h;

[0031] (2) Add the polylactic acid that step (1) gained is equipped with in the there-necked flask of 100ml thermometer, stirrer and reflux condenser, and add 6.20g trimellitic anhydride and 65mlDMF, stir until trimellitic anhydride is all dissolved, heat up To 130°C, react for 3h, distill under reduced pressure, wash the precipitate with deionized water at 60°C, and dry in vacuum;

[0032] (3) Weigh 8.9 g of the solid obtained in step (2) and add it into a 100 ml three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and add 1.95 g of trimellitic anhydride and 60 ml of DMF, then add 10 ml of water-carrying agent DMB and 0.5 % catalyst p-toluenesulfonic acid, control the temperature at 120°C, reflux under reduced pressure f...

Embodiment 3

[0037] (1) Add 6.8g of ethylene glycol, 20g of L-lactide and 0.10g of stannous chloride into a 100mL three-necked flask equipped with a thermometer and a stirrer, and react at 100KPa, 120°C, under nitrogen protection for 3h;

[0038] (2) the polylactic acid that step (1) gained is added in the there-necked flask that 100ml thermometer, agitator and reflux condenser are equipped with, and add 5.86g trimellitic anhydride and 55mlDMF, stir until trimellitic anhydride is all dissolved, heat up To 130°C, react for 3h, distill under reduced pressure, wash the precipitate with deionized water at 60°C, and dry in vacuum;

[0039] (3) Weigh 9.0 g of the solid obtained in step (2) and add it into a 100 ml three-necked flask equipped with a thermometer, a stirrer and a reflux condenser, and add 2.10 g of trimellitic anhydride and 60 ml of DMF, then add 10 ml of water-carrying agent DMB and 0.3 % catalyst p-toluenesulfonic acid, control the temperature at 130°C, reflux under reduced press...

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Abstract

The invention relates to a preparation method of hyper-branched bio-based epoxy resin. The method comprises the following steps: initiating ring-opening polymerization of lactide by a coinitiator polyol to obtain hydroxyl-terminated polylactic acid with a low molecular weight, synthesizing carboxyl-terminated hyper-branched polyester from trimellitic anhydride and the obtained polylactic acid, and synthesizing the hyper-branched epoxy resin from chloropropylene oxide and the obtained hyper-branched polyester. Lactide is from corn, potato and other crops, has wide sources, and is in favor of reducing the consumption of petroleum resources and the discharge of CO2, and the obtained epoxy resin is a novel functional material with excellent performances, has the advantages of low viscosity, high solid content, easy film formation, and good adhesion and thermal stability, has good toughening and manufacturability improving effects when blended with common epoxy resin, can be used in adhesives, coatings and composite materials as a matrix, and is suitable for molding technologies of various composite materials, so the hyper-branched bio-based epoxy resin has very wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of bio-based epoxy resin, in particular to a preparation method of hyperbranched bio-based epoxy resin. Background technique [0002] As a thermosetting resin, epoxy resin is widely used in coatings, Composite coatings, adhesives, electronic packaging materials, engineering plastics, civil engineering 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 raw materials for preparing epoxy resin mainly come from petroleum. Oxygen resins reduce dependence on petroleum resources; at the same time, epoxy resins have disadvantages such as poor toughness and heat resistance that need to be improved, which also restrict the application range of epoxy resins. [0004] Polylactic acid (PLA) is a typical polymer material derived from biorenewable resources such as corn and potato, and has excellent biodegradability...

Claims

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Application Information

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IPC IPC(8): C08G59/12C08G59/02C08G81/00C08G63/91C08G63/08
Inventor 万里林育锋张简邦宏吴中仁
Owner JIANGSU SUPLA BIOPLASTICS CO LTD
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