Copolycarbonate and composition comprising the same
The present invention relates to a copolycarbonate and a molded article comprising the same. The copolycarbonates according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and has effects of improving impact strength at room temperature, impact strength at low temperature, and melt index properties.
1. A copolycarbonate comprising:
1) a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3, and
2) a repeating unit represented by the following Chemical Formula 4,
wherein the copolycarbonate has a weight average molecular weight of 1,000 to 100,000 g/mol:
in Chemical Formula 2,
each of X 2 is independently C 1-10 alkylene,
each of Y 1 is independently hydrogen, C 1-6 alkyl, halogen, hydroxy, alkoxy or C 6-20 aryl,
each of R 2 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 10 to 200,
in Chemical Formula 3,
each of X 3 is independently C 1-10 alkylene,
each of Y 2 is independently C 1-10 alkoxy,
each of R 3 is independently hydrogen; or C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and
l is an integer of 10 to 200,
in Chemical Formula 4,
X 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, and
R 4 , R 5 , R 6 and R 7 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen.
2. The copolycarbonate of claim 1 , wherein R 1 , R 2 and R 3 are each independently C 1-6 alkyl.
3. The copolycarbonate of claim 1 , in n, m and 1 are each independently an integer of 30 to 60.
4. The copolycarbonate of claim 1 , wherein a weight ratio between the repeating unit represented by Chemical Formula 2 and the repeating unit represented by Chemical Formula 3 is 1:99 to 99:1.
5. The copolycarbonate of claim 1 , wherein Chemical Formula 2 is represented by the following Chemical Formula 2-1:
6. The copolycarbonate of claim 1 , wherein Chemical Formula 3 is represented by the following Chemical Formula 3-1:
7. The copolycarbonate of claim 1 , wherein the repeating unit represented by Chemical Formula 4 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, and bis(4-hydroxyphenyl)diphenylmethane.
8. The copolycarbonate of claim 1 , wherein Chemical Formula 4 is represented by the following Chemical Formula 4-1:
9. The copolycarbonate of claim 1 , wherein the copolycarbonate has a weight average molecular weight of 15,000 to 40,000 g/mol.
10. A polycarbonate composition comprising:
a polycarbonate; and
the copolycarbonate of claim 1 .
11. The polycarbonate composition of claim 10 , therein a polysiloxane structure is not introduced in a main chain of the polycarbonate.
12. The polycarbonate composition of claim 10 , wherein the polycarbonate comprises a repeating unit represented b e following Chemical Formula 5:
in Chemical Formula 5,
R 4 , R 5 , R 6 and R 7 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen,
X′ 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.
13. The polycarbonate composition of claim 10 , wherein a weight ratio of the copolycarbonate and the polycarbonate is from 99:1 to 1:99.