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Preparation method and application of hyperbranched polyester

A hyperbranched polyester and reaction technology, applied in the field of polymer materials, can solve the problems of irreversible destruction of enzymes, slow enzymatic catalysis reaction, limited use, etc., and achieve the effects of improving melting index, low cost and simple process

Inactive Publication Date: 2013-10-30
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the enzymatic catalytic reaction proceeds slowly, and there is a threat of irreversible damage to the enzyme
At the same time, the hyperbranched polyesters synthesized in most patent literature reports are limited to inks, coatings, films, moldings, etc.

Method used

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  • Preparation method and application of hyperbranched polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of hyperbranched polyester from oxalic acid and glycerin

[0031] Under solvent-free conditions, weigh 0.55mol of oxalic acid and 0.55mol of glycerol in a molar ratio of 1:1 into a 250mL four-necked flask equipped with a stirrer, thermocouple, nitrogen gas inlet pipe, and Claisen condenser . Under nitrogen flow, the flow rate is 40mL / min, after replacing the air 3 times, add 0.1wt% dibutyltin oxide of the total amount of oxalic acid and glycerin, and heat the oil bath to 80℃ for 2h; reaction process In the process, the flowing gas method is used to separate the water generated during the reaction, that is, to maintain a flow of nitrogen gas at 150 mL / min to separate the water generated during the reaction; after the reaction, cool to room temperature to obtain a transparent and viscous reaction product, that is, the sample 1.

[0032] Measure the M of product sample 1 w 1380, M n Is 660.

Embodiment 2

[0034] Preparation of hyperbranched polyester from succinic acid and trimethylolethane

[0035] Under the condition of solvent-free, weigh according to the molar ratio of 1.5:1, 0.51mol of succinic acid and 0.34mol of trimethylolethane are added to the mixer, thermocouple, nitrogen gas inlet pipe, and Claisen condenser 250mL four-necked flask. Under nitrogen flow, the flow rate is 40mL / min, after replacing the air twice, add 0.2wt% dibutyltin dilaurate of the total amount of succinic acid and trimethylolethane, and heat to 100℃ in an oil bath , The reaction is carried out for 3h; during the reaction, the flow gas method is used to separate the water generated in the reaction, that is, keep the nitrogen gas flowing at 200mL / min to separate the water generated in the reaction; after the reaction, cool to room temperature to obtain a transparent, Viscous reaction product, sample 2.

[0036] The Mw of the product sample 2 was measured to be 2,350, and the Mn was 1,040.

Embodiment 3

[0038] Preparation of Hyperbranched Polyester from Adipic Acid and Glycerin

[0039] Under solvent-free conditions, weigh 0.52mol of adipic acid and 0.26mol of glycerol in a molar ratio of 2:1 into a 250mL four-necked flask equipped with a stirrer, thermocouple, nitrogen gas inlet pipe, and Claisen condenser . Under nitrogen flow, the flow rate is 80mL / min. After replacing the air 3 times, add 3wt% dibutyltin dilaurate of the total amount of adipic acid and glycerin, and heat to 150℃ in an oil bath, and react for 8h. , The water produced by the reaction was separated by a reduced pressure method, and the water formed in the reaction was separated by applying a reduced pressure of 150 mbar; after the reaction was completed, cooled to room temperature to obtain a transparent and viscous reaction product, namely sample 3.

[0040] Measure the M of product sample 3 w 22260, M n For 2930.

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Abstract

The invention belongs to the technical field of high polymer materials and discloses a preparation method and application of hyperbranched polyester for improving the flowability of polypropylene. The preparation method of hyperbranched polyester comprises the following steps: adding a dicarboxylic acid and trihydric alcohol into a flask; after carrying out air replacement 2-3 times under the protection of protective gas, adding an organic tin metal catalyst; heating to a set reaction temperature; under the condition that the protective gas keeps flowing moderately, carrying out reaction, and separating out water produced in reaction; and at the end of the reaction, cooling the obtained product to room temperature, thereby obtaining a reaction product. Hyperbranched polyester prepared by using the method disclosed by the invention is used as an additive. The synthesis method of hyperbranched polyester, provided by the invention, is simple in process and low in cost and the prepared hyperbranched polyester can significantly improve the melt index of polypropylene.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a preparation method of hyperbranched polyester for improving the fluidity of polypropylene and the application of hyperbranched polyester. Background technique [0002] Hyperbranched polymer is a highly branched polymer with a three-dimensional network structure. Although the structure is not as perfect as dendrimers, its synthesis is relatively simple, suitable for industrial production, and has low cost, so it has a very Great market prospects. Hyperbranched polyester has the advantages of good fluidity, low viscosity, and good solubility, and has important applications in coatings, paints, adhesives, plasticizers, polymer blends, etc. [0003] US 4749728 prepared polyester by reacting trimethylolpropane with adipic acid under the condition of no solvent and catalyst, and processed the thermosetting coating by reacting the resulting product with a compound. CN 1649931 Synth...

Claims

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Application Information

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IPC IPC(8): C08G63/12C08G63/85C08L23/12C08L67/00
Inventor 李小娇解廷秀
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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