Polylactide resin composition and method for preparing same

A polylactide resin composition with controlled optical isomerism and branching addresses PLA's processing instability by enhancing melt strength and flowability, improving film production stability and uniformity.

WO2026043106A1PCT designated stage Publication Date: 2026-02-26LG CHEM LTD
View PDF 5 Cites 0 Cited by

Patent Information

Application Number
PCT/KR2025/010239
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2025-07-04
Filing Date
2025-07-14
Publication Date
2026-02-26

AI Technical Summary

Technical Problem

Polylactic acid (PLA) exhibits low melt strength and melt elasticity, leading to processing instability during film manufacturing, increased neck-in phenomenon, and edge weave, limiting productivity and film thickness uniformity.

Method used

A polylactide resin composition comprising two types of polylactide resins with controlled degrees of optical isomerism and branching, specifically a first resin with a D content of 5 to 45 wt% and PDI of 1.5 to 2.0, and a second resin with a D content of 5 to 45 wt% and PDI greater than 2.0 to 2.5, combined with a compound having an epoxy group, to enhance melt strength and flowability.

Benefits of technology

The composition improves neck-in phenomenon and flowability, maintaining film thickness uniformity and reducing processing instability, while minimizing unreacted epoxy residues that cause additional branching reactions.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure PCTKR2025010239-APPB-IMG-000001
    Figure PCTKR2025010239-APPB-IMG-000001
  • Figure PCTKR2025010239-APPB-IMG-000002
    Figure PCTKR2025010239-APPB-IMG-000002
Patent Text Reader

Abstract

The present invention relates to a polylactide resin composition with reduced neck-in and improved flowability, and a method for preparing same.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Synthesis process of laminating polylactic resin

    CN114940749A

  • Biodegradable compounds and biodegradable eco-friendly film and containers produced therefrom

    KR101034050B1

  • Degradable polymer fibers, preparation, product, and methods of use

    KR1020010012198A

  • Polylactic acid polymer composition for thermoforming,polylactic acid polymer sheet for thermoforming, andthermoformed object obtained therefrom

    KR1020050093803A

  • Biodegradable nanocomposite composition using a blend of polyactic acid and polybutylene succinate-co-adipate

    KR1020130052774A