Compositions useful in preparing recyclable polycarbonate sheeting having a matte appearance

1. A composition comprising one or more polymers consisting of polycarbonate or copolycarbonates wherein the copolycarbonates contain greater than 50 mole percent of polycarbonate units and less than 50 mole percent of monomer units which copolymerize with polycarbonate units;

5 to 20 percent by weight of one or more minerals containing high aspect ratio CaSiO 3 having an aspect ratio of 6 or greater; and

a salt of a phosphorous based acid, wherein sheets formed of the composition have a matte appearance and exhibit a top gloss measured according to ISO 2813 with a 60° angle incidence of about 60 or less.

2. A composition according to claim 1 which comprises from about 0.05 to about 0.5 percent by weight of the salt of a phosphorous based acid.

3. A composition according to claim 1 comprising one or more antioxidants useful with polycarbonate containing compositions.

4. A composition according to claim 3 wherein the one or more antioxidants useful with polycarbonate containing compositions are present in an amount of about 200 to about 2000 parts per million by weight based on the weight of the composition.

5. A composition according claim 1 wherein the polycarbonates or copolycarbonates are branched, linear or a mixture of branched and linear polycarbonates.

6. A formulation which comprises a blend of a 33 percent by weight or greater of a composition according to claim 1 and one or more unfilled polycarbonates wherein the unfilled polycarbonates are present in an amount of up to about 67 percent by weight of the formulation.

7. A sheet prepared from a composition according to claim 1 .

8. A sheet according to claim 7 comprising

two or more layers wherein at least one layer comprises one or more polymers consisting of polycarbonate or copolymers of greater than 50 mole percent by weight of polycarbonate units and less than 50 mole percent of monomer units which copolymerize with polycarbonate units;

5 to 20 percent by weight of one or more minerals containing high aspect ratio CaSiO 3 having an aspect ratio of 6 or greater, and a salt of a phosphorous based acid; and

at least one layer comprises one or more unfilled polycarbonates.

9. A sheet according to claim 8 wherein the layer comprising one or more polymers consisting of polycarbonate or copolymers of greater than 50 mole percent or greater of polycarbonate units and less than 50 mole percent of monomer units which copolymerize with polycarbonate units; 5 to 20 percent by weight of one or more minerals containing high aspect ratio CaSiO 3 having an aspect ratio of 6 or greater, and a salt of a phosphorous based acid is 0.5 to 10 percent of the thickness of the sheet and the layer which comprises one or more unfilled polycarbonates is 99.5 to 90 percent of the thickness of the sheet.

10. A sheet according to claim 8 wherein the two or more layers are formed by extrusion, co-extrusion, lamination or co-lamination.

11. A sheet according to claim 7 wherein one or both of the surfaces of the sheet comprise a layer of a composition comprising one or more polymers consisting of polycarbonate or a copolymer of greater than 50 mole percent by weight of polycarbonate units and less than 50 mole percent of monomer units which copolymerize with polycarbonate units; and 5 to 20 percent by weight of one or more minerals containing high aspect ratio CaSiO 3 having an aspect ratio of 6 or greater, and a salt of a phosphorous based acid.

12. A composition according to claim 1 wherein the salt of a phosphorous based acid is monosodium phosphate.

13. A composition according to claim 1 containing one or more pigments.

14. A composition according to claim 13 wherein the one or more pigments comprise carbon black and titanium dioxide.