Continuous preparation method of biodegradable block co-polyester and biodegradable block co-polyester

A block copolyester, biological technology, applied in the field of biodegradable block copolyester, can solve the problem of poor thermal performance and physical processing performance of degradable polymers, difficulty in continuous production, and ethylene glycol recycling rate Bad question

Pending Publication Date: 2021-05-04
CHINESE TEXTILE ACAD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the problems of poor thermal performance and physical processing performance of existing degradable polymers, easy generation of tetrahydrofuran during the preparation process, poor recycling rate of ethylene glycol, and difficulty in realizing continuous production. Pr

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
  • Continuous preparation method of biodegradable block co-polyester and biodegradable block co-polyester
  • Continuous preparation method of biodegradable block co-polyester and biodegradable block co-polyester

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041]Example 1:

[0042](1) Paramethylene terephthalic acid, butyric acid, and ethylene glycol, the molar ratio of terephthalic acid, butyric acid and ethylene glycol in the slurry is: 1: 0.2: 1.5.

[0043](2) The slurry prepared in step (1) is continuously added to the esterification, and esterification is carried out at a temperature of 220 ° C to form a polyester prepolymer.

[0044](3) Inject the polyester prepolymer into the pre-concentrated system, complete polycondensation at a temperature of 250 ° C, obtain a polyester prepolymer melt of the characteristic viscosity of 0.3 dl / g, and metering from the melt metering gear pump The polycondensation system is delivered to the prepolymer melt pipe.

[0045](4) After melt the polybut di dikanol ester having a characteristic viscosity of 1.0 dl / g and acetate exchange catalyst, after melt the screw extruder, a polybuta-butenikanol ester is mixed melt, and Ptine 2 The tantaliol ester mixed melt was measured by the melt metering gear pump inj...

Example Embodiment

[0048]Example 2:

[0049](1) The molar ratio of terephthalic acid, oxalic acid, and ethylene glycol, the molar ratio of benzolic acid, oxalic acid and ethylene glycol in the slurry is: 1: 0.42: 2.0.

[0050](2) The slurry prepared in step (1) is continuously added to the esterification, and esterification is carried out at 200 ° C to form a polyester prepolymer.

[0051](3) Inject the polyester prepolymer into the pre-concentrated system, and the polycondensation is completed at a temperature of 240 ° C to obtain a polyester prepolymer melt having a characteristic viscosity of 0.1 dl / g, and is metered from the melt metering gear pump. The polycondensation system is delivered to the prepolymer melt pipe.

[0052](4) Follow the polybut dikate of 0.5 dl / g with the propionate exchange catalyst to the propionate exchange catalyst, form the polybutancinate hybrid melt, PTTER The dirate dikate mixed melt is injected into the prepolymer melt pipe after melt melt metering gear pump, and the injectio...

Example Embodiment

[0055]Example 3:

[0056](1) Paramethylene terephthalic acid, sebacic acid, and ethylene glycol, the molar ratio of terephthalic acid, sebacic acid, and ethylene glycol in the slurry is: 1: 0.3: 1.6.

[0057](2) The slurry prepared in step (1) is continuously added to the esterification kettle, and esterification is performed at a temperature of 230 ° C to form a polyester prepolymer.

[0058](3) Inject the polyester prepolymer into the pre-concentrated system, and the polycondensation is completed at 260 ° C to obtain a polyester prepolymer melt of the characteristic viscosity of 0.4 dl / g, and is metered from the melt metering gear pump. The polycondensation system is delivered to the prepolymer melt pipe.

[0059](4) After melting the polybut dikanol ester having a characteristic viscosity of 1.5 dl / g with a phenyl acetate exchange catalyst, a polybut dikarcanol ester is mixed melt, and the second The tantaliol ester mixed melt was measured by the melt meter gear pump injected into the pr...

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

PropertyMeasurementUnit
Intrinsic viscosityaaaaaaaaaa
Intrinsic viscosityaaaaaaaaaa
Intrinsic viscosityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a continuous preparation method of biodegradable block co-polyester and biodegradable block co-polyester. The preparation method comprises the following steps: preparing terephthalic acid, aliphatic dibasic acid and ethylene glycol into slurry, carrying out esterification and polycondensation to obtain a polyester prepolymer melt, melting poly(butylene succinate) and a transesterification catalyst to obtain a poly(butylene succinate) mixed melt, converging the polyester prepolymer melt and the poly(butylene succinate) mixed melt, conveying to a final polycondensation reaction system, and carrying out final polycondensation reaction to obtain a biodegradable block co-polyester melt; and subjecting the biodegradable block co-polyester melt to forming, crystallization and grain-sized dicing to obtain the biodegradable block co-polyester crystal slice. The preparation method disclosed by the invention can be continuously carried out, tetrahydrofuran is not generated in the preparation process, the recycling rate of ethylene glycol is improved, and the prepared co-polyester is good in thermal property and physical processing properties.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a method for continuously preparing biodegradable block copolyesters and the biodegradable block copolyesters. Background technique [0002] With the increasingly serious problem of environmental pollution, biodegradable polymers have attracted more and more attention. Currently, most biodegradable materials are aliphatic polyesters. The application of aliphatic polyesters in industrial and agricultural fields is greatly limited due to their poor thermal and physical processing properties. [0003] In recent years, some researchers have focused on the synthesis of copolyesters via aliphatic and aromatic units in order to obtain low-cost biodegradable polymers with both satisfactory thermal and physical processing properties and biodegradability. Research. [0004] Among them, polyethylene terephthalate (PET) is a very important thermoplastic with a wide rang...

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
IPC IPC(8): C08G63/183C08G63/199C08G63/84
CPCC08G63/183C08G63/84C08G63/199
Inventor 邱志成刘涛李鑫王颖王雪
Owner CHINESE TEXTILE ACAD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap