Patent · US Active

Polylactic acid block copolymers and preparation methods thereof

US9365672B2 · kind B2 · utility

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4References

20Claims

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Assignee

NINGBO INSTITUTE OF MATERIALS TECHNOLOGY & ENGINEERING, CHINESE ACADEMY OF SCIENCES · CN

Inventors

Jian Zhou · Wolitun, CN
Peng Chen · Zhejiang, CN
Qun Gu · San Jose, US
Jun Li · Foster City, US
Wentao Shi · Goleta, US
Zongbao Wang · Zhejiang, CN
Zhiqiang Jiang · Zhejiang, CN
Xuedong Wu · Zhejiang, CN

Key dates

Filing date	Nov 29, 2011
Grant date	Jun 14, 2016
Priority date	—
Expiry date	Jul 31, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G63/60
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A polylactic acid triblock copolymer and a preparation method thereof are described. The polylactic acid triblock copolymer comprises an aromatic polyester oligomer block and a polylactic acid block. The polylactic acid triblock copolymer is obtained by reacting an aromatic polyester oligomer with a monomer lactide at a desired temperature. The polylactic acid block copolymer has a regular structure indicated by peak melting temperatures (Tm) corresponding to the aromatic polyester oligomer block and the polylactic acid block, respectively. Examples of the aromatic polyester oligomer block include polyethylene terephthalate, polybutylene terephthalate, and polyethylene 1,4-naphthalate. Examples of the monomer lactide include L-lactide and D-lactide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.