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

Polylactic acid resin composition, process for producing the same and molding thereof

A technology of polylactic acid resin and composition, applied in the field of polylactic acid resin composition, can solve the problems such as inability to obtain the proportion and insufficient improvement of heat resistance, and achieve the effect of high crystallization proportion and excellent heat resistance

Inactive Publication Date: 2006-11-08
TEIJIN LTD +1
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, none of the methods described in Japanese Patent Publication (kokai) No. 2003-128900 and Japanese Patent Publication (Kokai) No. 2003-96285 can obtain sufficiently high stereoscopic crystals (stereocoordination) of poly-L-lactic acid and poly-D-lactic acid. crystal) ratio, and does not sufficiently improve heat resistance

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
  • Polylactic acid resin composition, process for producing the same and molding thereof
  • Polylactic acid resin composition, process for producing the same and molding thereof
  • Polylactic acid resin composition, process for producing the same and molding thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Organicization of Layered Clay Minerals

[0087] 100 g of sodium montmorillonite (Kunipia F, manufactured by Kunimine Industries Co. Ltd., cation exchange capacity: 115 meq / 100 g) was dispersed in 5000 ml of water at 80° C.; 59.2 g of dihydroxyethylmethyl stearyl bromide Ammonium was dissolved in 2000ml of water at 80°C; subsequently, the two were mixed to carry out the organicization of montmorillonite; the organicized montmorillonite (hereinafter referred to as 18(OH) 2 -Mont) washed three times, freeze-dried, and crushed. 18(OH) determined by ignition method 2 -Mont has an inorganic residue of 63%.

[0088] Preparation of Polylactic Acid-Layered Clay Mineral Complex

[0089] 100g of L-lactide, 3.5g of 18(OH) 2 -Mont and 200 mg of tin octoate were added to the reactor and vacuumed to 10 -2 mmHg; then, the temperature was gradually raised while the mixture was fully stirred, and kept at 160°C for 1 hour; the reaction product was dissolved in chloroform and dropped i...

Embodiment 2-4

[0095] The DSC measurement of the film of the polylactic acid resin composition was carried out as described in Example 1, but the retention temperature {(A)°C} after melting was 120°C (Example 2), 100°C (Example 3) and 80°C ( Example 4). The obtained results are shown in Table 1.

Embodiment 5

[0097] Prepare the film of polylactic acid resin composition as described in Example 1, and measure on DSC, but difference is, by adding 0.5g of 18(OH) in the preparation step of polylactic acid-layered clay mineral combination 2 -Mont to obtain a poly-L-lactic acid-layered clay mineral combination (PLLA-clay #2) having a weight average molecular weight of about 120,000 and a layered clay mineral content of 0.3% by weight (based on the inorganic component), Use PLLA-clay #2 instead of PLLA-clay #1. The obtained results are shown in Table 1.

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

A polylactic acid resin composition from which a polylactic acid of satisfactorily high stereo crystal ratio can be obtained through selective crystallization into stereo crystals of poly(L-lactic acid) and poly(D-lactic acid); a process for producing the same; and a polylactic acid molding of satisfactorily high stereo crystal ratio, obtained therefrom. There is provided a polylactic acid resin composition characterized in that it contains: a material of polylactic acid / layered clay mineral bonded together consisting of a layered clay mineral and one of poly(D-lactic acid) and poly(L-lactic acid) bonded to the layered clay mineral, and the other of poly(D-lactic acid) and poly(L-lactic acid) not bonded to the layered clay mineral.

Description

technical field [0001] The present invention relates to a polylactic acid resin composition, its preparation method, and a molded article obtained by melt molding and crystallization thereof. Background of the invention [0002] Polylactic acid is decomposed under the action of microorganisms and biodegradation enzymes, and converted into lactic acid, carbon dioxide and water that are harmless to the human body. Therefore, polylactic acid has attracted people's attention as an alternative material for medical materials and general-purpose resins. Although polylactic acid is a crystalline resin, polylactic acid has a low crystallization rate and exhibits properties substantially similar to non-crystalline resins. That is, since polylactic acid softens rapidly, especially very rapidly around the glass transition temperature (generally, the modulus of elasticity is less than 1 / 100), it is difficult to obtain sufficient properties such as heat resistance, moldability, and mold ...

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): C08L67/04C08G63/08C08J5/00C08K3/34C08K9/04C08K9/08C08L101/16
CPCC08G63/08C08K9/08C08L67/04C08L2666/18
Inventor 大内诚冈本浩孝中野充臼杵有光金森健志奥山久嗣山下征士影山裕史
Owner TEIJIN LTD
Features
  • Generate Ideas
  • 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