Thermoplastic Polycarbonate Compositions With Improved Static Resistance
A thermoplastic resin composition comprises an aromatic polycarbonate; an impact modifier; a flame retardant; and from 0.9 to 5.38 mol % of an anti-static additive having the formula: wherein X is independently selected from halogen or hydrogen provided that at least one X is halogen; n, m and p are integers from 0 to 12; and Y is zero or a heterocyclic atom, other than carbon, of an atomic ring and is either nitrogen, oxygen, sulfur, selenium, phosphorus, arsenic, and the like; R 1 , R 2 , and R 3 are the same, each having an aliphatic hydrocarbon radical with 1 to 8 carbon atoms or an aromatic hydrocarbon radical of 6 to 12 carbon atoms and R 4 is a hydrocarbon radical with 1 to 18 carbon atoms; wherein the amount of the anti-static additive is based on 100 kg of the composition.
1 . A thermoplastic resin composition comprising:
an aromatic polycarbonate;
an impact modifier;
a flame retardant; and
from 0.9 to 5.38 mol of an anti-static additive having the formula
wherein X is independently selected from halogen or hydrogen provided that at least one X is halogen; n, m and p are integers from 0 to 12; and Y is zero or a heterocyclic atom, other than carbon, of an atomic ring and is either nitrogen, oxygen, sulfur, selenium, phosphorus, arsenic, and the like; R 1 , R 2 , and R 3 are the same, each having an aliphatic hydrocarbon radical with 1 to 8 carbon atoms or an aromatic hydrocarbon radical of 6 to 12 carbon atoms and R 4 is a hydrocarbon radical with 1 to 18 carbon atoms;
wherein the amount of the anti-static additive is based on 100 kg of the composition.
2 . The composition of claim 1 , wherein the anti-static additive is a fluorinated phosphonium sulfonate having the general formula:
wherein F is fluorine; n is an integer of from 1 to 12, S is sulfur; R 1 , R 2 and R 3 are the same, each having an aliphatic hydrocarbon radical of 1 to 8 carbon atoms or an aromatic hydrocarbon radical of 6 to 12 carbon atoms and R 4 is a hydrocarbon radical of 1 to 18 carbon atoms.
3 . The composition of claim 1 , wherein the anti-static additive is tetrabutylphosphonium perfluorobutylsulfonate.
4 . The composition of claim 1 , wherein the impact modifier comprises ABS, MBS, Bulk ABS, AES, ASA, MABS, polycarbonate-polysiloxane copolymers, and combinations thereof.
5 . The composition of claim 1 , wherein the flame retardant comprises an organic phosphate.
6 . The composition of claim 1 , wherein the composition is capable of achieving UL94 V0 at a thickness of 1.5 mm.
7 . The composition of claim 1 , wherein a molded sample consisting of the composition has a surface resistivity of less than or equal to 2E+15 ohms/cm 2 .
8 . An article comprising the composition of claim 1 .
9 . A thermoplastic resin composition comprising:
from 50 to 98 wt. % of an aromatic polycarbonate;
from 1 to 30 wt. % of an impact modifier;
from 1 to 20 wt. % of a flame retardant; and
from 0.9 to 5.38 mol of an anti-static additive having the formula
wherein X is independently selected from halogen or hydrogen provided that at least one X is halogen; n, m and p are integers from 0 to 12; and Y is zero or a heterocyclic atom, other than carbon, of an atomic ring and is either nitrogen, oxygen, sulfur, selenium, phosphorus, arsenic, and the like; R 1 , R 2 , and R 3 are the same, each having an aliphatic hydrocarbon radical with 1 to 8 carbon atoms or an aromatic hydrocarbon radical of 6 to 12 carbon atoms and R 4 is a hydrocarbon radical with 1 to 18 carbon atoms;
wherein the amount of the anti-static additive is based on 100 kg of the composition.
10 . The composition of claim of claim 9 , wherein the anti-static additive is tetrabutylphosphonium perfluorobutylsulfonate.
11 . The composition of claim 9 , wherein the impact modifier comprises ABS or Bulk ABS.
12 . An article comprising the composition of claim 9 .
13 . The composition of claim 9 , wherein the composition is capable of achieving UL94 V0 at a thickness of 1.5 mm.
14 . The composition of claim 9 , wherein a molded sample consisting of the composition has a surface resistivity of less than or equal to 2E+15 ohms/cm 2 .
15 . A thermoplastic resin composition comprising:
from 50 to 97.9 wt. % of an aromatic polycarbonate;
from 1 to 30 wt. % of an impact modifier comprising ABS or bulk ABS;
from 1 to 20 wt. % of a phosphorous containing flame retardant;
from 0.1 to 2 wt. % TSAN; and
from 0.9 to 5.38 mol of an anti-static additive, wherein the anti-static additive is tetrabutylphosphonium perfluorobutylsulfonate;
wherein the amount of the anti-static additive is based on 100 kg of the composition.
16 . The composition of claim of claim 15 , wherein the anti-static additive is tetrabutylphosphonium perfluorobutylsulfonate.
17 . The composition of claim 15 , wherein a molded sample consisting of the composition has a surface resistivity of less than or equal to 2E+15 ohms/cm 2 .
18 . An article comprising the composition of claim 15 .
19 . The composition of claim 15 , wherein the composition is capable of achieving UL94 V0 at a thickness of 1.5 mm.