A kind of bio-based degradable polyester resin and its preparation method and application

A biodegradable polyester and bio-based technology, applied in applications, food science, chewing gum, etc., can solve the problems of difficult-to-synthesize and degradable elastomers, and the types need to be further expanded, so as to increase sales and use value and improve degradability , the effect of appropriate reaction time

Active Publication Date: 2022-05-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 1547436A adopts the biodegradable copolymer prepared by cyclic ester ring-opening polymerization to completely replace the polyvinyl acetate in the gum base, which can solve the disadvantage that polyvinyl acetate is difficult to degrade; but it is difficult to synthesize degradable polyvinyl acetate by this method. elastomer
The biodegradability of this type of chewing gum is mainly realized by polymers synthesized from cyclic ester monomers such as lactide and glycolide. Since the structure and properties of these polymers can be adjusted through the control of synthesis conditions, therefore, Its biggest advantage is that it is easy to realize the regulation of various properties of chewing gum; however, the elasticity and toughness of this type of polymer need to be properly strengthened, and its types need to be further expanded

Method used

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  • A kind of bio-based degradable polyester resin and its preparation method and application
  • A kind of bio-based degradable polyester resin and its preparation method and application
  • A kind of bio-based degradable polyester resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Get 34.58g of isosorbide, 9.14g of 2,3-butanediol and 36.28g of succinic acid into a 100ml four-neck flask, then heat up to 170°C, 2 Under the reaction, the esterification reaction was carried out for 1h. When it is cooled to room temperature, add 420 μL of 100 g / L tetrabutyl titanate / 1,4-butanediol mixed solution, then raise the temperature to 190°C, and perform esterification for 2 hours to obtain a polyester prepolymer; continue to heat up to 240°C, conduct polycondensation reaction under vacuum for 16 hours, remove water and some small molecules, pass N 2 Cool to 60°C and take out. The resulting bio-based degradable polyester resin contains the following repeating units:

[0040]

Embodiment 2

[0042] Get 25.92g of isosorbide, 15.99g of 2,3-butanediol and 38.10g of succinic acid into a 100ml four-neck flask, then heat up to 170°C, 2 Under the reaction for 1h, carry out the esterification reaction. When it is cooled to room temperature, add 420 μL of 100 g / L tetrabutyl titanate / 1,4-butanediol mixed solution, then raise the temperature to 190°C, and perform esterification for 2 hours to obtain a polyester prepolymer; then raise the temperature to 220°C, react it in a vacuum state for 8h, remove water and some small molecules, pass N 2 Cool to 60°C and take out. The resulting bio-based degradable polyester resin contains the following repeating units:

[0043]

Embodiment 3

[0045] Get 13.50g of isosorbide, 5.73g of ethylene glycol, 17.96g of 2,3-butanediol and 42.8g of succinic acid into a 100ml four-necked flask, then heat up to 150°C, 2 The reaction was carried out for 1 h, and the esterification reaction was carried out. When it was cooled to room temperature, 420 μL of 100 g / L tetrabutyl titanate / 1,4-butanediol mixed solution was added, and the temperature was raised to 190° C., and the esterification reaction was carried out for 2 h to obtain Polyester prepolymer; then raise the temperature to 220°C, react it in a vacuum state for 6h, remove water and some small molecules, pass N 2 Cool to 60°C and take out. The resulting bio-based degradable polyester resin contains the following repeating units:

[0046]

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Abstract

The invention provides a bio-based degradable polyester resin and a preparation method thereof, and applies the bio-based degradable polyester resin to a bio-based degradable chewing gum base. The invention adopts the polycondensation of bio-based small molecule dibasic acid and bio-based small molecule diol which is safe and non-toxic and derived from renewable sources, and synthesizes bio-based degradable polyester with a glass transition temperature of 15-45°C. It can provide excellent elasticity and plasticity, and has a high degradation rate. It can be used as a degradable chewing gum base resin, which can not only ensure good performance of the chewing gum itself, but also has biodegradable characteristics.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a bio-based degradable polyester resin, a preparation method thereof and an application of the bio-based degradable polyester resin in a bio-based degradable chewing gum base. Background technique [0002] As a chewing candy, chewing gum has a long history and powerful functions. Chewing gum is mainly divided into water-soluble food additives and water-insoluble gum base. After chewing in the mouth, the food additives are dissolved, and the residue that cannot be absorbed by the human body is called gum base. Gum base is the substance that determines the performance of chewing gum. It is mainly composed of elastomers and resins. Under the action of ester resin, etc., the gum base of chewing gum is endowed with moderate viscoelasticity and hardness, so that it has a good taste and longer chewing time. Residual gum base will form chewing gum pollution, which is not onl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672A23G4/08A23G4/06
CPCC08G63/672A23G4/08A23G4/06A23V2002/00A23V2200/222
Inventor 王朝李娇张立群
Owner BEIJING UNIV OF CHEM TECH
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