Polycarbonate Compositions with Thin Wall Flame Retardant Properties and Shaped Article Therefore

A composition comprising:

• a. from 20 wt. % to 80 wt. % of a polycarbonate polymer component;
• b. from 0.5 wt. % to 30 wt. % of phosphazene-based flame retardant;
• c. from 0.01 wt. % to 8 wt. % of an siloxane component;
• and
• d. from 10 wt. % to 50 wt. % of a glass fiber component,
• wherein the composition exhibits a tensile elongation less than or equal to 2% when tested in accordance with D638 at 5 mm/min at break on a Type I bar specimen, flame performance of x at a thickness of at least 5 mm, and a notched Izod impact strength of at least 150 J/m when tested in accordance with ASTM D256 at 23° C. and 5 ft-lb on a 3.2 mm bar specimen s, and
• wherein all weight percent are based on the total weight of the composition.

A method for forming a composition, the method comprising:

• a. forming a mixture comprising
• i. from 20 wt. % to 80 wt. % of a polycarbonate polymer,
• 1) from 20 wt. % to 80 wt. % of a polycarbonate polymer component,
• 2) from 0.5 wt. % to 30 wt. % of phosphazene-based flame retardant,
• 3) from 0.01 wt. % to 5 wt. % of a siloxane component, and
• 4) from 10 wt. % to 50 wt. % of a filler;
• and
• b. injection molding or extruding the mixture to form the composition,
• wherein the composition exhibits a notched Izod impact strength of at least 150 J/m when tested in accordance with ASTM D256 at 23° C. and 5 ft-lb on a 3.2 mm bar specimen,
• wherein the composition exhibits a tensile elongation less than or equal to 2% when tested in accordance with D638 at 5 mm/min at break on a Type I bar specimen, and
• wherein the composition achieves a probability of first time pass p(FTP) of at least 0.85 for normal V0 of at 1.2 mm according to UL 94 (2019).