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

Production method for polylactide resin

A technology of polylactide and lactide, which is applied in the field of preparation of polylactide resin, can solve the problems of increased residence time, reduced transmission speed, increased viscosity of polylactide melt, etc., to minimize discoloration and thermal decomposition, Short dwell time, easy delivery effect

Inactive Publication Date: 2014-08-20
LG CHEM LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the bulk polymerization proceeds, the viscosity of the polylactide melt increases
Due to the high viscosity, the polylactide melt becomes less fluid and therefore the conveying speed is reduced
In addition, to remove residual lactide during evaporation, the residence time at high temperature is increased, which problematically leads to resin discoloration and accelerated thermal decomposition

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
  • Production method for polylactide resin
  • Production method for polylactide resin
  • Production method for polylactide resin

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The invention provides a method for preparing polylactide resin, comprising the step of ring-opening polymerization of lactide monomer in the presence of an organometallic catalyst and an aromatic monomer scavenger, wherein based on 100 parts by weight of lactide Monomer, the aromatic monomer scavenger is used in an amount of 0.1 to 20 parts by weight.

[0031] In addition, the present invention provides a polylactide resin prepared by the above method, and a polylactide resin composition comprising the polylactide resin.

[0032] Hereinafter, a method for preparing a polylactide resin according to a specific embodiment of the present invention will be described in more detail.

[0033] Unless expressly stated otherwise, several terms used in the present invention are defined below.

[0034] Unless specifically mentioned in the present invention, the term "comprising" or "comprising" refers to the inclusion of certain elements (or components) without limitation, and sh...

Embodiment 1

[0065] 755g of L-lactide, 0.07g of Sn-(Oct) 2 The catalyst and 45g of ethylbenzene were added into a 2L polymerization reactor, and the polymerization reaction was carried out at 180°C and 100 rpm for 300 minutes to prepare polylactide resin.

Embodiment 2

[0067] A polylactide resin was prepared in the same manner as in Example 1 except for using 26 g of ethylbenzene.

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
Bronsted acidityaaaaaaaaaa
Bronsted acidityaaaaaaaaaa
Bronsted acidityaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a preparation method of a polylactide resin, in which the preparation method includes the step of performing ring opening polymerization of lactide monomers in the presence of an organometallic catalyst and an aromatic monomer scavenger, and the aromatic monomer scavenger is used in an amount of 0.1 to 20 parts by weight, based on 100 parts by weight of the lactide monomers.

Description

technical field [0001] The invention relates to a preparation method of polylactide resin. Background technique [0002] Polylactide (or poly(lactic acid)) resins are a class of resins containing repeating units of the following chemical formula. Unlike existing petroleum-based resins, these polylactide resins are based on biomass, so they have environmentally friendly features that allow them to be used as renewable resources, and compared with other resins, in their preparation process Exhibits lower CO that contributes to environmental warming 2 The discharge, when buried, is biodegradable in the presence of moisture and microorganisms, and has suitable mechanical strength comparable to existing known petroleum-based products. [0003] [chemical formula] [0004] [0005] These polylactide resins are mainly used in disposable packaging / containers, coatings, foam products, films / sheets and fabrics. Recently, in order to use polylactide resins as semi-permanent mater...

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 Applications(China)
IPC IPC(8): C08G63/08C08G63/78C08G63/85C08L67/04
CPCC08G63/08C08G63/823C08G63/78C08G63/85C08L67/04
Inventor 孙精敏朴胜瑩尹性澈沈度用
Owner LG CHEM LTD
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