Copolycarbonate and method for preparing the same

Patent metadata

Field	Value
Publication number	US-10017608-B2
Application number	US-201615514018-A
Country	US
Kind code	B2
Filing date	Aug 17, 2016
Priority date	Sep 1, 2015
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

Provided are a copolycarbonate having superior weather resistance as well as excellent mechanical properties, and a preparation method thereof.

First claim

The invention claimed is:

1. A copolycarbonate, comprising a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2, and
having a weight average molecular weight of 1,000 to 100,000 g/mol:

wherein R 1 to R 8 are each independently hydrogen or C 1-10 alkyl,
Y is C 1-10 alkylene,
Z is a bond, —OCO—, or —COO—, and
X 1 to X 2 are each independently C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2 , or CO,

wherein R 9 to R 12 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and
X 3 is C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2 , or CO.

2. The copolycarbonate of claim 1 , wherein Y is C 1-5 alkylene.

3. The copolycarbonate of claim 1 , wherein R 1 to R 8 are each independently hydrogen or C 1-4 alkyl.

4. The copolycarbonate of claim 1 , wherein a molar ratio of the repeating unit represented by Chemical Formula 1 and the repeating unit represented by Chemical Formula 2 is 1:0.001 to 1:1.

5. The copolycarbonate of claim 1 , wherein a change in yellow index (dYI) is 20 or less, as measured in accordance with ASTM G155.

6. A preparation method of the copolycarbonate of claim 1 , the method comprising the step of polymerizing a composition comprising a compound represented by the following Chemical Formula 3, an aromatic diol compound, and a carbonate precursor:

wherein R 1 to R 8 are each independently hydrogen or C 1-10 alkyl,
Y is C 1-10 alkylene,
Z is a bond, —OCO—, or —COO—, and
X 1 to X 2 are C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2 , or CO.

7. The preparation method of claim 6 , wherein the compound represented by Chemical Formula 3 is used in an amount of 0.1% by weight or more and 20% by weight or less, based on 100% by weight of the composition.

8. A molded article manufactured by using the copolycarbonate of claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Ki Jae
• Son Young Wook
• Hong Moo Ho
• BAHN Hyong Minh
• Park Jung Jun

Classifications

• C07C323/52

  the carbon skeleton being acyclic and saturated · CPC title

• C08G64/081 Primary

  containing sulfur · CPC title

• C08G64/305 Primary

  and alcohols · CPC title

• C08G64/24

  and phenols · CPC title