Impact compositions

1. A composition comprising:

a polycarbonate;

1 to 5 wt % based on a total weight of the composition of a nanosilica having a D 50 particle size by volume of 5 to 50 nanometers determined in accordance with ISO-22412-17; wherein the nanosilica has a hydrophobic coating; and

a siloxane domain having repeat units of the formula 10;

wherein each R is independently a C 1-13 monovalent organic group and the value of E is 2 to 1,000;

wherein the composition comprises at least one of

a polycarbonate-polysiloxane copolymer, wherein, if present, the polysiloxane portion of the polycarbonate-polysiloxane copolymer constitutes at least a portion of the siloxane domain, and the value of E of formula (10) is 40 to 80, wherein the polycarbonate-polysiloxane copolymer can be the same or different as the polycarbonate; or

a plurality of polysiloxane particles having a D 50 particle size by volume of 0.1 to 10 micrometers determined in accordance with ISO-22412-17, wherein, if present, the plurality of polysiloxane particles constitutes at least a portion of the siloxane domain.

2. The composition of claim 1 , wherein the composition comprises 10 to 40 wt % of the polycarbonate-polysiloxane copolymer based on the total weight of the composition.

3. The composition of claim 1 , wherein the composition comprises 1 to 10 wt % of the plurality of polysiloxane particles.

4. The composition of claim 1 , wherein the composition comprises the plurality of polysiloxane particles and the plurality of polysiloxane particles has a D 50 particle size of 1 to 5 micrometers.

5. A composition comprising:

a polycarbonate;

1 to 5 wt % based on a total weight of the composition of a nanosilica having a D 50 particle size by volume of 5 to 50 nanometers; wherein the nanosilica has a hydrophobic coating;

a plurality of carbon nanotubes; and

0.1 to 5 wt % of a polysiloxane homopolymer having a siloxane domain having repeat units of the formula 10 based on the total weight of the composition;

wherein each R is independently a C 1-13 monovalent organic group and the value of E is 2 to 1,000.

6. The composition of claim 5 , wherein the polysiloxane homopolymer comprises a polydimethylsiloxane.

7. The composition of claim 5 , wherein the composition comprises 0.1 to 3 wt % of the polysiloxane homopolymer based on the total weight of the composition.

8. The composition of claim 5 , wherein the composition comprises 2 to 10 wt % of the plurality of carbon nanotubes based on the total weight of the composition.

9. The composition of claim 1 , wherein the composition has an increased notched Izod impact energy at 23° C. as compared to the same composition but that is free of one of the nanosilica or the siloxane domain.

10. The composition of claim 1 , wherein the composition comprises 60 to 90 wt % of the polycarbonate based on the total weight of the composition.

11. The composition of claim 1 , wherein the polycarbonate comprises a bisphenol A homopolycarbonate.

12. The composition of claim 1 , wherein the composition comprises 2.5 to 4.5 wt % of the nanosilica based on the total weight of the composition.

13. The composition of claim 1 , wherein the nanosilica has a D 50 particle size by volume of 5 to 40 nm.

14. The composition of claim 1 , wherein the composition comprises 3 to 15 wt % of the siloxane domain based on the total weight of the composition.

15. The composition of claim 1 , further comprising an encapsulated fluoropolymer, wherein the encapsulated fluoropolymer optionally comprises a styrene acrylonitrile encapsulated polytetrafluoroethylene.