Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for synthesizing aliphatic polyester and dialkyl carbonate using dibasic ester and cyclic carbonate

A technology of dialkyl carbonate and cyclic carbonate is applied in the field of synthesizing aliphatic polyester and dialkyl carbonate from dibasic acid ester and cyclic carbonate to achieve the effect of good development prospects

Inactive Publication Date: 2013-07-03
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cyclic carbonates can also be prepared from carbon dioxide, thereby converting carbon dioxide into pharmaceutical intermediates (dialkyl carbonates). If industrialized production can be realized, it will play an important role in solving problems such as white pollution, fossil fuel depletion and global warming. , so this method has a good development prospect

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
  • Method for synthesizing aliphatic polyester and dialkyl carbonate using dibasic ester and cyclic carbonate
  • Method for synthesizing aliphatic polyester and dialkyl carbonate using dibasic ester and cyclic carbonate

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] [Example 1] In the reactor that thermometer, nitrogen conduit and fractionating column are housed, add the dimethyl succinate of 0.15mol, the ethylene carbonate of 0.3mol, the ethyl acetoacetate zinc catalyst of 0.045%mol, reaction temperature React at 180-230°C for 0.5h to prepare a PES prepolymer with an intrinsic viscosity of 0.1205dL / g and dimethyl carbonate, and the yield of dimethyl carbonate is 50.3%.

example 2

[0013] [Example 2] in the reactor that thermometer, nitrogen conduit and fractionating column are housed, add the dimethyl sebacate of 0.15mol, the ethylene carbonate of 0.3mol, the ethyl acetoacetate strontium catalyst of 0.09%mol, reaction temperature 180-230°C, react for 5 hours to prepare PES prepolymer and dimethyl carbonate, and the yield of dimethyl carbonate is 50.8%.

example 3

[0014] [Example 3] add the dimethyl succinate of 0.15mol in the reactor that thermometer, nitrogen conduit and fractionating column are housed, the ethylene carbonate of 0.3mol, the ethyl acetoacetate zinc catalyst of 0.045%mol, temperature of reaction 180 ~230°C, reacted for 13 hours, and prepared PES prepolymer with an intrinsic viscosity of 0.4485dL / g and dimethyl carbonate, and the yield of dimethyl carbonate was 67.2%.

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
Login to View More

Abstract

The invention relates to a method for synthesizing aliphatic polyester and dialkyl carbonate using dibasic ester and cyclic carbonate. The appropriate process conditions are as follows: the mole ratio of cyclic carbonate to aliphatic dibasic ester is (1-5):(5-1), the catalyst accounts for 0.01-1% of the total weight of reactant materials, the reaction temperature is 180-230 DEG C, and the reaction time is 0.5-13 hours. Under such reaction conditions, the maximum yield of dialkyl carbonate is 67.2%, and the intrinsic viscosity of PES performed polymer is 0.4485 dL / g. According to the invention, M is a transition metal (such as Mn, Fe, Co, Ni, Cu, Zn, Zr, Al, Sr and Ba) or a rare earth metal (such as Ce and La); and R can be straight-chain or branch-chain alkyl or aryl and corresponding alkoxyl or aryloxyl.

Description

technical field [0001] The invention relates to a method for synthesizing biodegradable aliphatic polyester and dialkyl carbonate by reacting cyclic carbonate and aliphatic dibasic acid ester by using a beta-diketone (ester) metal complex as a catalyst. Background technique [0002] Plastics are widely used due to their excellent physical and chemical properties, but they also cause serious white pollution. Aliphatic polyesters, such as polybutylene succinate (PBS), polyethylene succinate (PES), polyethylene adipate (PEA) and other aliphatic polyesters, have heat resistance Good, good processing performance, excellent mechanical properties, high heat distortion temperature, stable performance under normal environmental conditions but can be degraded to CO under certain conditions 2 With the advantages of water and water, it can be used as a substitute for traditional plastics and has become a research hotspot. The synthesis method is mainly the esterification polycondensat...

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): C08G63/16C08G63/78C07C69/96C07C68/06
Inventor 刘绍英马楷王公应
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com