Copolycarbonate and composition containing the same

Patent metadata

Field	Value
Publication number	US-9751979-B2
Application number	US-201515029081-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 4, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Disclosed is a polycarbonate composition including a polycarbonate; and a copolycarbonate, where the copolycarbonate includes an aromatic polycarbonate-based first repeating unit; and aromatic polycarbonate-based second repeating units having siloxane bonds, which include a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3, where the copolycarbonate has a melt index (MI) of 3 to 9 g/10min as measured in accordance with ASTM D1238 (300° C., 1.2 kg conditions), and a transparency of 87 to 91% as measured in accordance with ASTM D1003 (layer thickness of 3 mm):

The copolycarbonate in the composition exhibits an excellent transparency and a high spiral flow while having a high impact strength at room temperature and a low melt index.

First claim

The invention claimed is:

1. A polycarbonate composition comprising:
a polycarbonate; and
a copolycarbonate,
wherein the copolycarbonate comprises: an aromatic polycarbonate-based first repeating unit; and aromatic polycarbonate-based second repeating units having siloxane bonds,
wherein the copolycarbonate has a melt index (MI) of 3 to 9 g/10 min as measured accordance with ASTM D1238 (300° C., 1.2 kg conditions), and a transparency of 87 to 91% as measured in accordance with ASTM D1003 (layer thickness of 3 mm), and
wherein the second repeating units comprise a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3:

in Chemical Formula 2,
each of X 1 is independently C 1-10 alkylene,
each of R 5 is independently hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and
n is an integer of 10 to 50,

in Chemical Formula 3,
each of X 2 is independently C 1-10 alkylene,
each of Y 1 is independently hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy, or C 6-20 aryl,
each of R 6 is independently hydrogen; or C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and
m is an integer of 55 to 80.

2. The polvcarhonate composition of claim 1 ,
wherein the copolycarbonate has a spiral flow of 16 to 25 cm as measured in accordance with ASTM D3123 (300° C., mold temperature of 80° C., capillary thickness of 1.5 mm, holding pressure of 2000 bar).

3. The polycarbonate composition of claim 1 ,
wherein the copolycarbonate has a ratio of the spiral flow and the melt index (MI) (cm/g/10 min) of 1.7 to 5.0.

4. The polycarbonate composition of claim 1 ,
wherein the copolycarbonate has a weight average molecular weight of 1,000 to 100,000 g/mol.

5. The polycarbonate composition of claim 1 ,
wherein the first repeating unit is represented by Chemical Formula 1:

in the Chemical Formula 1,
R 1 , R 2 , R 3 and R 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and
Z 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.

6. The polvcarbonate composition of claim 5 ,
wherein the repeating unit represented by Chemical Formula 1 is derived from one or more aromatic diol compounds selected from the group consisting of bis(4-hydroxyphenyl)methane, bis(4-hydroxyphenyl)ether, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)ketone, 1,1-bis(4-hydroxyphenyl)ethane, bisphenol A, 2,2-bis(4-hydroxyphenyl)butane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane, 2,2-bis(4-hydroxy-3,5-dichlorophenyl) propane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 2,2-bis(4-hydroxy-3-chlorophenyl)propane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bis(4-hydroxyphenyl)diphenylmethane, and α,ω-bis[3-(o-hydroxyphenyl)propyl]polydimethylsilaxane.

7. The polycarbonate composition of claim 5 ,
wherein When Chemical Formula 1 is represented by the following Chemical Formula 1-1:

8. The polycarbonate composition of claim 1 ,
wherein the weight ratio of the repeating unit represented by Chemical Formula 2 and the repeating unit represented by Chemical Formula 3 is from 80:20 to 95:5.

9. The polycarbonate composition of claim 1 ,
wherein the repeating unit represented by Chemical Formula 2 is represented by the following Chemical Formula 2-2:

10. The polycarbonate composition of claim 1 ,
wherein the repeating unit represented by Chemical Formula 3 is represented by the following Chemical Formula 3-2:

11. The polycarbonate composition of claim 1 ,
wherein the copolycarbonate has an impact strength at low-temperature of 700 to 950 J/m as measured at −30° C. in accordance with ASTM D256 (⅛inch, Notched Izod).

12. The polycarbonate composition of claim 1 ,
wherein the copolycarbonate has an impact strength at room temperature of 700 to 1000 J/m as measured at 23° C. in accordance with ASTM D256 (⅛inch , Notched Izod).

13. The polycarbonate composition of claim 1 ,
wherein a polysiloxane structure is not introduced in a main chain of the polycarbonate.

14. The polycarbonate composition of claim l,
wherein the polycarbonate comprises a repeating unit represented by Chemical Formula 4:

in Chemical Formula 4,
R′ 1 , R′ 2 , R′ 3 and R′ 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and
Z′ 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.

Assignees

• Lg Chemical Ltd

Inventors

• Son Young Wook
• Bahn Hyong Min
• Hwang Young Young
• Park Jung Jun
• Hong Moo Ho
• Lee Ki Jae
• Chun Byoung Kyu
• Ko Un

Classifications

• C09K21/08

  containing halogen · CPC title

• C08G64/18

  Block or graft polymers · CPC title

• C08K5/521

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C08G64/1691

  unsaturated · CPC title

• C08L2207/53

  Core-shell polymer · CPC title