Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of degradable thioaliphatic aromatic polyester and its preparation method

An aliphatic aromatic and aromatic binary technology, applied in the field of organic synthesis, can solve the problems of poor degradation performance, poor thermal performance, low decomposition temperature, etc., achieve good thermal stability, solve white pollution, and excellent degradation performance Effect

Active Publication Date: 2019-04-05
江苏鼎恩生物科技有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the deepening of research, the disadvantages of aliphatic polyester gradually emerged, such as low decomposition temperature and poor thermal performance, which cannot meet the actual thermal processing requirements.
Aromatic polyesters have high decomposition temperature, good thermal stability, and low price, but their degradation performance is very poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of degradable thioaliphatic aromatic polyester and its preparation method
  • A kind of degradable thioaliphatic aromatic polyester and its preparation method
  • A kind of degradable thioaliphatic aromatic polyester and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the aliphatic aromatic polyester of the embodiment of the present invention, described method comprises:

[0029] Put thiodipropionic acid, aromatic dihydric alcohol and catalyst at 150°C-190°C under the protection of nitrogen for esterification reaction to obtain intermediate products;

[0030] The feeding of nitrogen gas is stopped, and the intermediate product is placed at 190° C. to 230° C. and 50 Pa to 1000 Pa for polycondensation reaction to obtain polyester.

[0031] The polyester obtained above is a crude product, and a purification step for the crude polyester may also be provided.

Embodiment 1

[0034] The preparation method of poly(thiodipropionic acid-resorcinol bis(2-hydroxyethyl) ether) ester is as follows:

[0035] Add 2.673g of thiodipropionic acid, 2.973g of resorcinol bis(2-hydroxyethyl)ether and 0.020g of antimony trioxide into a 50ml one-necked flask, and carry out esterification reaction at 101KPa, 170°C and nitrogen atmosphere 2.5 hours. After the above-mentioned esterification reaction, the nitrogen flow was stopped, and at 190°C, the vacuum was evacuated to 600 Pa, and the polycondensation reaction was carried out for 1.5 hours, and then the temperature was raised to 215°C, and the vacuum was evacuated to 70 Pa, and the polycondensation reaction was carried out for 2 hours to obtain crude polyester. Afterwards, polyester purification: add 19mL chloroform to the crude polyester, and after most of the polyester is dissolved, take the clear liquid with a syringe, drop it into methanol, and centrifuge the solution after precipitation is formed, filter, wash ...

Embodiment 2

[0041] The preparation method of poly(thiodipropionic acid-resorcinol bis(2-hydroxyethyl) ether) ester is as follows:

[0042] Add 2.673g of thiodipropionic acid, 2.973g of resorcinol bis(2-hydroxyethyl)ether and 0.020g of n-butyl titanate into a 50ml one-necked flask, and conduct esterification reaction at 160°C for 2.5 hours under nitrogen atmosphere . After the esterification reaction, the nitrogen flow was stopped, and under the condition of 200°C, the vacuum was evacuated to 600 Pa, and the polycondensation reaction was carried out for 2 hours, then the temperature was raised to 220°C, and the vacuum was evacuated to 50 Pa, and the polycondensation reaction was carried out for 2 hours to obtain crude polyester. Purify the crude polyester product: add 18mL chloroform to the crude polyester product, and after most of the polyester dissolves, take the clear liquid with a syringe, drop it into ethanol to form a precipitate, then centrifuge, filter, wash with alcohol, and dry ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a degradable thioaliphatic aromatic polyester and a preparation method thereof. The method comprises: placing thiodipropionic acid, aromatic dihydric alcohol and a catalyst at 150°C to 190°C and Carry out esterification reaction under the protection of nitrogen to obtain an intermediate product; stop feeding nitrogen, and place the intermediate product at 190°C to 230°C under a vacuum state for polycondensation reaction to obtain a polymer; add organic Solvent, the polymer is mostly dissolved to obtain a clear liquid, which is dropped into an alcohol solvent to form a white precipitate, which is centrifuged to obtain a white solid, which is washed with alcohol and dried to obtain A degradable thioaliphatic aromatic polyester. The method of the invention synthesizes a thioaliphatic aromatic polyester material with both good performance and excellent degradation performance.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a degradable thioaliphatic aromatic polyester and a preparation method thereof. Background technique [0002] Due to its low price and versatility, plastics have been widely used in industry, agriculture and people's daily life. However, plastics are difficult to degrade naturally after being discarded, resulting in "white pollution". Polyester is a kind of polymer material with a wide range of uses. The common ones are polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), which have good physical and mechanical properties and are widely used For all kinds of food and beverage packaging. However, this kind of polyester is extremely difficult to degrade, and it is easy to become white pollutants after being discarded. Therefore, searching for polyesters with excellent performance and degradation properties has become a major research hotsp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/688C08G63/90
CPCC08G63/6886C08G63/90C08G2230/00
Inventor 唐然程正载王云刘盼盼胡海曾胜
Owner 江苏鼎恩生物科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com