Polycarbonate composition

1. A polycarbonate composition, comprising

A) 8-70 wt. % of a polycarbonate component,

B) 40-90 wt. % of a polysiloxane-polycarbonate copolymer component,

wherein the siloxane blocks of the polysiloxane-polycarbonate copolymer are derived from the corresponding dihydroxy polysiloxane (I):

wherein, in this formula (I),

R1 independently represents hydrogen atom, halogen atom, hydroxy group, alkyl group having 1 to 20 carbon atoms, alkoxy or aryl group;

R2 independently represents hydrocarbon group having 1 to 13 carbon atoms or hydroxy group;

R3 independently represents alkylene group having 2 to 8 carbon atoms;

m independently represents an integer of 0 to 4;

n independently represents an integer of 1 to 200;

A represents a structure of the following chemical formula (II):

X represents polynuclear arylene group which has 6 to 30 carbon atoms and is unsubstituted or substituted with halogen atom, alkyl group, alkoxy group, aryl group or carboxy group,

C) a flame retardant component, which comprises 0.5-6 wt. % of a cyclic phosphazene of formula (X)

wherein,

k represents 1 or an integer from 1 to 10,

having a trimer content (k=1) of from 60 to 98 mol %, based on component C,

and wherein,

R is in each case identical or different and represents an amine group; C 1 - to C 8 -alkyl, each optionally halogenated; C 1 - to C 8 -alkoxy; C 5 - to C 6 -cycloalkyl, each optionally substituted by alkyl, and/or by halogen; C 6 - to C 20 -aryloxy, each optionally substituted by alkyl, and/or by halogen, and/or by hydroxy; C 7 - to C 12 -aralkyl, each optionally substituted by alkyl, and/or by halogen; or a halogen group; or an OH group, and

D) an impact modifier component, which comprises 0.5-6 wt. % of methyl methacrylate-butadiene-styrene,

with the above weight percentages based on said polycarbonate composition as 100 wt. %.

2. The polycarbonate composition according to claim 1 , wherein, said polysiloxane-polycarbonate copolymer comprises 4-10 wt. % of siloxane units, based on said polysiloxane-polycarbonate copolymer as 100 wt. %.

3. The polycarbonate composition according to claim 1 , wherein, the content of said trimer (k=1) is 65 to 95 mol % based on component C.

4. The polycarbonate composition according to claim 3 , wherein, the content of said trimer (k=1) is 65-85 mol %, the content of said tetramers (k=2) is from 10 to 20 mol %, the content of the higher oligophosphazenes (k=3, 4, 5, 6 and 7) is from 5 to 15 mol %, and the content of the phosphazene-oligomers with k≥8 is from 0 to 1 mol %, each based on component C.

5. The polycarbonate composition according to claim 1 , wherein, said cyclic phosphazene is one or more selected from the group consisting of propoxyphosphazene, phenoxyphosphazene, methylphenoxyphosphazene, aminophosphazene and fluoroalkylphosphazene.

6. The polycarbonate composition according to claim 1 , wherein, said methyl methacrylate-butadiene-styrene has butadiene or butadiene-styrene copolymer as the rubber phase, of which the weight percent is 60-85 wt. %, based on said methyl methacrylate-butadiene-styrene as 100 wt. %.

7. The polycarbonate composition according to claim 1 , wherein, said methyl methacrylate-butadiene-styrene has PMMA or PMMA-styrene copolymer as the graft layer.

8. The polycarbonate composition according to claim 1 , further comprising a component E) 0.05-1 wt. % of an anti-dripping agent, based on said polycarbonate composition as 100 wt. %.

9. The polycarbonate composition according to claim 1 , further comprising lubricants, demolding agents, nucleating agents, stabilizers, antistatic agents, dyes, pigments, fillers, or reinforcing agents.

10. A method comprising utilizing the polycarbonate composition according to claim 1 in the preparation of injection- or thermo-formed molded articles.

11. Molded articles, prepared from the polycarbonate composition according to claim 1 .

12. A process for the preparation of a polycarbonate composition, comprising the following steps:

mixing components for the preparation of said polycarbonate composition, said components including:

A) 8-70 wt. % of a polycarbonate component,

B) 40-90 wt. % of a polysiloxane-polycarbonate copolymer component,

wherein the siloxane blocks of the polysiloxane-polycarbonate copolymer are derived from the corresponding dihydroxy polysiloxane (I):

wherein, in this formula (I),

R1 independently represents hydrogen atom, halogen atom, hydroxy group, alkyl group having 1 to 20 carbon atoms, alkoxy or aryl group;

R2 independently represents hydrocarbon group having 1 to 13 carbon atoms or hydroxy group;

R3 independently represents alkylene group having 2 to 8 carbon atoms;

m independently represents an integer of 0 to 4;

n independently represents an integer of 1 to 200;

A represents a structure of the following chemical formula (II):

X represents polynuclear arylene group which has 6 to 30 carbon atoms and is unsubstituted or substituted with halogen atom, alkyl group, alkoxy group, aryl group or carboxy group,

C) a flame retardant component, which comprises 0.5-6 wt. % of a cyclic phosphazene of formula (X)

wherein,

k represents 1 or an integer from 1 to 10,

having a trimer content (k=1) of from 60 to 98 mol %, based on component C, and wherein

R is in each case identical or different and represents an amine group; C 1 - to C 8 -alkyl, each optionally halogenated; C 1 - to C 8 -alkoxy; C 5 - to C 6 -cycloalkyl, each optionally substituted by alkyl, and/or by halogen; C 6 - to C 20 -aryloxy, each optionally substituted by alkyl, and/or by halogen, and/or by hydroxy; C 7 - to C 12 -aralkyl, each optionally substituted by alkyl, and/or by halogen; or a halogen group; or an OH group, and

D) an impact modifier component, which comprises 0.5-6 wt. % of methyl methacrylate-butadiene-styrene,

with the above weight percentages based on said polycarbonate composition as 100 wt. %.

13. A polycarbonate composition, consisting of:

A) 8-70 wt. % of a polycarbonate component,

B) 25-90 wt. % of a polysiloxane-polycarbonate copolymer component,

C) a flame retardant component, which comprises 0.5-6 wt. % of a cyclic phosphazene of formula (X)

wherein,

k represents 1 or an integer from 1 to 10,

having a trimer content (k=1) of from 60 to 98 mol %, based on component C,

and wherein,

R is in each case identical or different and represents an amine group; C 1 - to C 8 -alkyl, each optionally halogenated; C 1 - to C 8 -alkoxy; C 5 - to C 6 -cycloalkyl, each optionally substituted by alkyl, and/or by halogen; C 6 - to C 20 -aryloxy, each optionally substituted by alkyl, and/or by halogen, and/or by hydroxy; C 7 - to C 12 -aralkyl, each optionally substituted by alkyl, and/or by halogen; or a halogen group; or an OH group, and

D) an impact modifier component, which comprises 0.5-6 wt. % of methyl methacrylate-butadiene-styrene,

optionally, E) 0.05-1 wt. % of an anti-dripping agent, based on said polycarbonate composition as 100 wt. %, and

optionally lubricants, demolding agents, nucleating agents, stabilizers, antistatic agents, dyes, pigments, fillers and reinforcing agents,

with the above weight percentages based on said polycarbonate composition as 100 wt. %.

14. The polycarbonate composition according to claim 13 , wherein the siloxane blocks of the polysiloxane-polycarbonate copolymer are derived from the corresponding dihydroxy polysiloxane (I):

wherein, in this formula (I),

R1 independently represents hydrogen atom, halogen atom, hydroxy group, alkyl group having 1 to 20 carbon atoms, alkoxy or aryl group;

R2 independently represents hydrocarbon group having 1 to 13 carbon atoms or hydroxy group;

R3 independently represents alkylene group having 2 to 8 carbon atoms;

m independently represents an integer of 0 to 4;

n independently represents an integer of 1 to 200;

A represents a structure of the following chemical formula (II):

X represents polynuclear arylene group which has 6 to 30 carbon atoms and is unsubstituted or substituted with halogen atom, alkyl group, alkoxy group, aryl group or carboxy group.

15. A method comprising utilizing the polycarbonate composition according to claim 13 in the preparation of injection- or thermo-formed molded articles.

16. Molded articles, prepared from the polycarbonate composition according to claim 13 .

17. A process for the preparation of a polycarbonate composition, comprising the following steps:

mixing components for the preparation of said polycarbonate composition, said components consisting of:

A) 8-70 wt. % of a polycarbonate component,

B) 25-90 wt. % of a polysiloxane-polycarbonate copolymer component,

C) a flame retardant component, which comprises 0.5-6 wt. % of a cyclic phosphazene of formula (X)

wherein,

k represents 1 or an integer from 1 to 10,

having a trimer content (k=1) of from 60 to 98 mol %, based on component C,

and wherein,

R is in each case identical or different and represents an amine group; C 1 - to C 8 -alkyl, each optionally halogenated; C 1 - to C 8 -alkoxy; C 5 - to C 6 -cycloalkyl, each optionally substituted by alkyl, and/or by halogen; C 6 - to C 20 -aryloxy, each optionally substituted by alkyl, and/or by halogen, and/or by hydroxy; C 7 - to C 12 -aralkyl, each optionally substituted by alkyl, and/or by halogen; or a halogen group; or an OH group, and

D) an impact modifier component, which comprises 0.5-6 wt. % of methyl methacrylate-butadiene-styrene,

optionally, E) 0.05-1 wt. % of an anti-dripping agent, based on said polycarbonate composition as 100 wt. %, and

optionally lubricants, demolding agents, nucleating agents, stabilizers, antistatic agents, dyes, pigments, fillers and reinforcing agents,

with the above weight percentages based on said polycarbonate composition as 100 wt. %.