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

Lactide analog monomer continuous polymerization device and process

A technology of ester monomer and polymerization device, which is applied in the field of devices for continuous polymerization of lactide monomer, can solve the problems of low controllability of polymerization reaction and no control means, and achieves good controllability and power. The effect of low consumption and simple equipment

Active Publication Date: 2006-12-20
CHINESE TEXTILE ACAD
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2. An important prerequisite for this invention to achieve its effect is to ensure that the pressure drop of the material in each section of the static mixer is within a reasonable range and to control the reaction temperature of each section within a reasonable range, and this invention does not No effective control measures are given, and the controllability of the polymerization reaction is not high

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
  • Lactide analog monomer continuous polymerization device and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The production object is polyglycolide PGA

[0039] 1. Ratio of materials: the raw material is glycolide, the initiator is stannous octoate, and the ratio of the two is: stannous octoate / glycolide=0.005% (molar ratio);

[0040]2. The process equipment includes: tubular polymerization reactor 1, melter 2, metering pump 4, gear pump 5, heating system 7:

[0041] A: Tubular polymerization reactor 1 is composed of three SK-type tubular static mixers 3 connected in series. The diameters of these three static mixers increase sequentially according to the direction of fluid flow. Their specifications and sizes are as follows:

[0042] Static mixer I has a cylinder with a diameter of 20mm, a length of 1400mm, and a built-in SK-type static mixing unit with a diameter of 20mm and a height of 20mm. It is divided into three heating zones, and the temperatures are 180°C, 190°C, and 205°C;

[0043] Static mixer II has a cylinder with a diameter of 25mm, a length of 1000mm, and a bui...

Embodiment 2

[0050] The production object is polylactide PLA

[0051] 1. Ratio of materials: the raw material is L-lactide, the initiator is stannous octoate, and the ratio of the two is: stannous octoate / L-lactide=0.01% (molar ratio);

[0052] 2. The process equipment includes: tubular polymerization reactor 1, melter 2, metering pump 4, gear pump 5, and heating system 7.

[0053] A: The tubular polymerization reactor is composed of SV and SK tubular static mixers 3 connected in series. The sequence of their serial connection is first SV and then SK type. The diameters of these four static mixers increase in sequence according to the direction of fluid flow. Large, their specifications and sizes are as follows:

[0054] Static mixer I has a cylinder with a diameter of 15mm, a length of 1200mm, and a built-in SV-type static mixing unit with a diameter of 15mm and a height of 15mm. It is divided into two heating zones, and the temperatures are 160°C and 170°C respectively;

[0055] The di...

Embodiment 3

[0063] The production object is polyisolactide PGLA (90 / 10)

[0064] 1. Material ratio: the raw material adopts glycolide / lactide=90 / 10 (molar ratio), and the initiator adopts stannous octoate, and its mol ratio with the raw material glycolide / lactide is 0.005%.

[0065] 2. The process equipment includes: tubular polymerization reactor 1, melter 2, metering pump 4, gear pump 5, heating system 7:

[0066] A: The tubular polymerization reactor is composed of two SK-type tubular static mixers 3 connected in series. The diameters of the two static mixers increase sequentially according to the direction of fluid flow. Their specifications and sizes are as follows:

[0067] Static mixer I has a cylinder with a diameter of 20mm, a length of 1600mm, a built-in diameter of 20mm, and a height of 20mm SK static mixing unit, which is divided into three heating zones, and the temperatures are 180°C, 195°C, and 215°C;

[0068] Static mixer II has a cylinder with a diameter of 25mm, a lengt...

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
Barrel diameteraaaaaaaaaa
Barrel diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a device for continuously polymerizing lactide monomer, wherein said device comprises a tubular polymer reactor, a meter pump and a fuser, which are serially connected; the tubular polymer reactor is formed by several serially connected tubular stable mixers whose diameters are increased stepped; the meter and the fuser are serially connected to the small end of reactor. The invention also provides a relative method, which comprises: adding material into the fuser, to be fused and mixed; using meter pump to feed the mixture into the small end of reactor, to pass all stable mixers; the polymer will be extruded from the large end. The invention has high transform rate, high yield and high quality.

Description

technical field [0001] The invention relates to a device and process for continuous polymerization of lactide monomers, in particular to a device and process for continuous polymerization of polyglycolide, polylactide and their copolymers. Background technique [0002] Polyglycolide, polylactide and their copolymers not only have good mechanical properties and easy processing, but also have good biocompatibility and biodegradability. The degradation products are non-toxic to the human body, no accumulation, and can be Absorbed by human tissue. It has been widely used in surgical sutures, fracture internal fixation materials, drug slow-release carriers and other fields. In addition, it also has good application prospects in environmental materials and tissue engineering. [0003] There are currently two ways to prepare this type of polymer. One is the direct polycondensation method using glycolic acid and lactic acid as raw materials. The polymer molecular weight of this met...

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): B01J19/20C08G63/08C08G63/78C08G64/02
Inventor 徐纪刚陈功林韩国义
Owner CHINESE TEXTILE ACAD
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