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Novel bio-based PBAT (polybutylene terephthalate adipate) synthesis method and application

A synthesis method and bio-based technology, applied in the field of biodegradable plastics, can solve the problems of difficult control of product molecular weight, inability to meet application requirements, affecting product quality, etc., and achieve good degradability, good mechanical properties, and shortened reaction time. Effect

Inactive Publication Date: 2019-01-04
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of plastic called PolyButyltoluatic acid(PTL) that was developed during World War II for use on food containers made from recycled material or waste paper had many advantages compared to older types like polystyrene because it could produce very strong polymer chains without losing its shape when heated up properly. These characteristics make them ideal substances for making various items including medical devices.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency at producing large quantities of biobased or recyclable plastisolids due to their unique chemical structure and processability. Current methods involve either making small amounts into larger products like films or adding binders during manufacturing steps such as extrusion or solvent casting. These techniques require expensive equipment and result in reduced yields compared to traditional methodology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Esterification stage: Add 1314g of adipic acid (AA) and 1050g of 1,4-butanediol (BDO) into a 10-liter polycondensation reactor respectively, start to heat slowly, and add 8g of Sorbitol, as the chain extender of this reaction, continues to heat up and remains at 150°C to carry out the normal pressure esterification dehydration reaction. After 1.5 hours of reaction, the water output reaches 85% of the theoretical value, and its acid value is measured at the same time. 7.8mg / g, namely is the end point of the reaction;

[0025] (2) secondary esterification stage: add 1,4-butanediol (BDO) of 1494g terephthalic acid (PTA) and 1400g after the esterification reaction finishes, stir for a while, add 11.25g titanium-magnesium composite catalyst, and Slowly raise the temperature to 220°C for normal dehydration reaction for 1 hour, the total amount of distilled by-products in the two stages of reaction reaches the total amount of theoretical water and methanol, which is the en...

Embodiment 2

[0028] (1) Esterification stage: Add 1314g of adipic acid (AA) and 920g of 1,4-butanediol (BDO) into a 10-liter polycondensation reactor respectively, start to heat slowly, and add 18g of Glycerol, as the chain extender of this reaction, continues to heat up and remains at 150°C to carry out the normal pressure esterification dehydration reaction. After 1.5 hours of reaction, the water output reaches 85% of the theoretical value, and its acid value is measured at the same time. 5.3mg / g, is the end point of the reaction;

[0029] (2) Transesterification stage: After the esterification reaction, add 1746g of dimethyl terephthalate (DMT) and 1400g of 1,4-butanediol (BDO), stir for a while, add 0.38g of tetra-n-butyl titanate The ester is slowly heated to 220°C for 1.5 hours of normal dehydration reaction. The total amount of distilled by-products in the two stages of reaction reaches the total amount of theoretical water and methanol, which is the end point of the reaction in thi...

Embodiment 3

[0032] (1) Esterification stage: Add 1314g of adipic acid (AA) and 920g of 1,4-butanediol (BDO) into a 10-liter polycondensation reactor respectively, start to heat slowly, and add 15g of As the chain extender of this reaction, pentaerythritol continues to heat up and remains at 155°C to carry out the normal pressure esterification dehydration reaction. After 1.5 hours of reaction, the water output reaches 85% of the theoretical value, and its acid value is measured at the same time. 2.6mg / g, namely is the end point of the reaction;

[0033] (2) Transesterification stage: After the esterification reaction, add 1746g of dimethyl terephthalate (DMT) and 1400g of 1,4-butanediol (BDO), stir for a while, add 0.38g of tetra-n-butyl titanate Ester, and slowly heat up to 220°C for normal dehydration reaction for 1.3 hours, the total amount of distilled by-products in the two stages of reaction reaches the total amount of theoretical water and methanol, which is the reaction end point ...

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Abstract

The invention discloses a novel bio-based PBAT (polybutylene terephthalate adipate) synthesis method and application. According to the method, polyhydric alcohol is directly added at the synthesis phase in the synthesis process, high-molecular-weight polybutylene terephthalate adipate (PBAT) can be synthesized, molecular weight can be controllably synthesized and is uniform, a molecular chain structure is uniform, added polyhydric alcohol is easily acquired, addition amount of the polyhydric alcohol is low, performance of a product cannot be affected, a technological process is controlled, reaction additives are preferentially selected, reaction time is greatly shortened, and a synthesized product is good in color and completely biodegradable, has excellent mechanical property and can be widely applied to the fields of consumer goods such as packaging materials and disposable tableware.

Description

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Claims

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Application Information

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Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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