Aliphatic polycarbonate with long-chain branches and aromatic copolyester thereof

Patent metadata

Field	Value
Publication number	US-9975990-B2
Application number	US-201415028860-A
Country	US
Kind code	B2
Filing date	Oct 29, 2014
Priority date	Oct 30, 2013
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Provided is an aliphatic polycarbonate-co-aromatic polyester with long-chain branches. The copolymer includes repeating units represented by —OAO— and Z(O—) a , which are linked via carbonyl (—C(O)—) and —C(O)YC(O)— as linkers. Also provided is an aliphatic copolycarbonate including repeating units represented by —OAO— and Z(O—) a , which are linked via carbonyl (—C(O)—) linkers. The aliphatic copolycarbonate has a weight average molecular weight of 30,000 or more.

First claim

The invention claimed is:

1. An aliphatic polycarbonate comprising repeating units represented by —OAO— and Z(O—) a linked via carbonyl (—C(O)—) linkers and having a weight average molecular weight of 30,000 or more wherein A is selected from substituted or unsubstituted C 3 -C 60 alkylene groups and combinations thereof, a is an integer equal to or greater than 3, and Z is an a-valent substituted or unsubstituted C 4 -C 60 radical, and
wherein HOAOH as a raw material of the repeating units —OAO— is selected from the group consisting of the compounds of Formulae 1a to 1h:

 and
Z(OH) a as a raw material of the repeating units Z(O—) a is selected from the group consisting of the compounds of Formulae 2a or 2c:

2. The aliphatic polycarbonate according to claim 1 , wherein HOAOH as a raw material of the repeating units —OAO— is the compound of Formula 1a:

3. The aliphatic polycarbonate according to claim 2 , wherein the amount of the Z(O—) a is from 0.1 to 0.4 mol %, based on the moles of the repeating units —OAO—.

4. The aliphatic polycarbonate according to claim 1 , wherein the linkers further comprise —C(O)YC(O)— and Y is selected from substituted or unsubstituted C 5 -C 20 arylenes, substituted or unsubstituted C 5 -C 20 heteroarylenes, and combinations thereof.

5. The aliphatic polycarbonate according to claim 1 , wherein the aliphatic polycarbonate is prepared in the presence of a base catalyst, and wherein the base catalyst consists of a lithium, sodium, or potassium cation and an alkoxy anion formed by deprotonation of the HOAOH.

Assignees

• Lotte Chemical Corp

Inventors

• Lee Bun Yeoul
• Lee Jung Jae
• Hwang Eun Yeong
• Jeon Jong Yeob
• Eo Seong Chan

Classifications

• C08G64/0208

  saturated · CPC title

• C08G64/1608

  saturated · CPC title

• C08G63/83

  Alkali metals, alkaline earth metals, beryllium, magnesium, copper, silver, gold, zinc, cadmium, mercury, manganese, or compounds thereof {(C08G63/823 takes precedence)} · CPC title

• C08G63/64 Primary

  Polyesters containing both carboxylic ester groups and carbonate groups · CPC title

• C08G64/305

  and alcohols · CPC title