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Poly (alkylene carbonate)-based resin and molded article manufactured therefrom

A technology of polyalkylene carbonate and molded products, applied in the field of molded products, can solve problems such as reducing transparency, achieve excellent gas barrier properties, excellent thermal stability, and improve the effect of heat shrinkage

Active Publication Date: 2021-12-14
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plasticizer has a problem of flowing out onto the surface of the molded product over time, thereby lowering qualities such as transparency

Method used

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  • Poly (alkylene carbonate)-based resin and molded article manufactured therefrom
  • Poly (alkylene carbonate)-based resin and molded article manufactured therefrom

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0080] In a glove box, the organozinc catalyst and methylene chloride were added to the high pressure reactor, followed by ethylene oxide. Subsequently, carbon dioxide was added thereto, and then a polymerization reaction was performed at 70° C. for 3 hours to prepare polyethylene carbonate having a weight average molecular weight of 140,000 g / mol. After the reaction, unreacted carbon dioxide, unreacted ethylene oxide and dichloromethane solvent were removed together, and pellets (diameter: 3 mm, thickness: 3 mm) were prepared using the prepared polyethylene carbonate with an extruder. ). The prepared polyethylene carbonate (Mw 140,000g / mol) pellets and polylactide resin (PLA2003D, NatureWorks Co., Ltd) were shaken at room temperature (23±5°C) at a weight ratio of 5:5 to Mix well, then place the mixture in a vacuum oven at 40°C overnight. Then, a pellet-shaped base resin was prepared using an extruder.

reference example 1

[0082] Except in Preparation Example 1, polyethylene carbonate (Mw 140,000 g / mol) pellets and polylactide resin (PLA 2003D, NatureWorks Co., Ltd) were mixed in a weight ratio of 7:3 instead of a weight ratio of 5 :5 mixed to prepare the base resin, in the same manner as in Preparation Example 1, Reference Example 1 was carried out.

reference example 2

[0084] Except in Preparation Example 1, polyethylene carbonate (Mw 140,000 g / mol) pellets and polylactide resin (PLA 2003D, NatureWorks Co., Ltd) were mixed in a weight ratio of 3:7 instead of a weight ratio of 5 :5 mixed to prepare the base resin, in the same manner as in Preparation Example 1, Reference Example 1 was carried out.

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Abstract

The present invention provides a poly (alkylene carbonate)-based resin having excellent thermal stability, thereby having an improved thermal shrinkage phenomenon, and a molded article manufactured using the poly (alkylene carbonate)-based resin. The polyalkylene carbonate-based resin includes 100 parts by weight of a base resin including a polyalkylene carbonate resin and a polylactide resin, and 5 parts by weight to 10 parts by weight of a heat-resistant shrinking agent, in which the base resin includes a polyalkylene carbonate resin and a polylactide resin in a weight ratio of 6: 4 to 4: 6, and the anti-heat-shrinkage agent is one or more selected from the group consisting of a poly (meth) acrylic acid alkyl ester-based resin, a poly alpha olefin-vinyl acetate-based resin, and a polyoxyalkylene-based resin.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2020-0010536 filed with the Korean Intellectual Property Office on Jan. 29, 2020, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present invention relates to a polyalkylene carbonate-based resin for producing blown films, and more particularly to a polyalkylene carbonate-based resin having excellent thermal stability so as to have improved thermal shrinkage, and the use of the polyalkylene carbonate-based resin Molded articles made of resin. Background technique [0004] Plastic is used as a material for various items due to its ease of manufacture and ease of use. Plastics are used in many fields, such as for construction materials and automotive interior materials, and for single-use products such as packaging films, disposable cups and disposable plates. [0005] Among them, as packag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/04C08L33/12C08L23/08C08L59/02C08J5/18
CPCC08L69/00C08L67/04C08J5/18C08L2201/10C08L2201/08C08L2201/06C08L2203/16C08J2369/00C08J2367/04C08J2469/00C08J2467/04C08J2433/12C08J2423/08C08J2359/02C08L33/12C08L23/0853C08L59/02C08L59/04C08J3/226C08J2367/00C08J2467/00C08J2459/00B29C48/0017C08L2205/03
Inventor 禹圆熙朴胜瑩金成庚申相哲闵庚玟金元硕
Owner LG CHEM LTD