ABA block copolymer including lactic acid units

Patent metadata

Field	Value
Publication number	US-10240005-B2
Application number	US-201615576419-A
Country	US
Kind code	B2
Filing date	Jul 13, 2016
Priority date	Jul 17, 2015
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

Disclosed herein is an ABA type block copolymer including a repeating unit derived from lactic acid that is excellent in physical properties, such as toughness. The ABA type block copolymer includes a polymer block A including a repeating unit derived from lactic acid and a polymer block B including a repeating unit represented by a formula [I] linked in an order of A-B-A. In the following formula [I], R 1 represents a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group, R 2 and R 3 each independently represent a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group, and n represents an integer of 1 to 10. X represents —S—, —SO— or —SO 2 —, and R 4 represents an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group.

First claim

The invention claimed is:

1. An ABA type block copolymer, in which a polymer block A comprising a repeating unit derived from lactic acid and a polymer block B comprising a repeating unit represented by a formula [I] are linked in an order of A-B-A,

(wherein R 1 represents a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group, R 2 and R 3 each independently represent a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group, and n represents an integer of any of 1 to 10; and X represents —S—, —SO— or —SO 2 —, and R 4 represents an unsubstituted or substituted alkyl group, or an unsubstituted or substituted aryl group).

Assignees

• Nippon Soda Co

Inventors

• Takahashi Eiji

Classifications

• C08G63/688

  containing sulfur · CPC title

• C08L101/16

  the macromolecular compounds being biodegradable · CPC title

• C08G63/6882 Primary

  derived from hydroxy carboxylic acids · CPC title

• C08G63/08

  Lactones or lactides · CPC title

• C08G81/00 Primary

  Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers (involving only carbon-to-carbon unsaturated bond reactions C08F299/00 {; polyester-amides C08G69/44; polyester-imides C08G73/16; polyamides-imides C08G73/14; block- or graft polymers containing polysiloxane sequences C08G77/42}) · CPC title