Polyetherimide polycarbonate blends

A process for producing a shaped article, the process comprising

• shaping a composition comprising:
• at least 15 wt. % of a polyetherimide;
• at least 35 wt. % of a polycarbonate;
• a polyetherimide siloxane;
• and
• optionally, at least one UV stabilizer,
• wherein the composition exhibits a UV resistance of ΔE ranging from more than 0 to less than or equal to 10 units after exposure to ultraviolet light for 300 hours, per ASTM D-4459 protocol,
• wherein the shaping is one selected from the group consisting of injection molding, compression molding, extrusion, film shaping, machining, and combinations thereof.

A composition comprising:

• at least 15 wt. % of at least one polyetherimide;
• at least 35 wt. % of at least one polycarbonate;
• at least one polyetherimide siloxane;
• at least one UV stabilizer;
• and
• at least one colorant,
• wherein the composition exhibits a UV resistance of ΔE ranging from more than 0 to less than or equal to 10 units after exposure to ultraviolet light for 300 hours, per ASTM D-4459 protocol;
• wherein the composition has a color selected from the group consisting of gray, black, white, light gray, and combinations thereof,
• wherein both the gray color and the black color exhibit an L* value of below 80;
• wherein, when the composition has either the gray color or the black color, the at least one colorant comprises at least 0.001 pph of carbon black;
• wherein both the white color and the light gray color exhibit an L* value greater than or equal to 80;
• wherein, when the composition has either the white color or the light gray color, the at least one colorant comprises less than 50 pph of titanium dioxide;
• wherein the weight ratio of polycarbonate to polyetherimide provides the composition with a melt index ranging from 1.5 to 6 g/min., at 295° C. and at a loading level of 6.7 kg;
• wherein the melt index is sufficient to enable the composition to be molded into a cavity having a dimension of greater than 0 and less than or equal to 3 mm;
• wherein an article, comprising the composition and shaped by one selected from the group consisting of molding, extruding, and combinations thereof, exhibits a strength retention of at least 50% when immersed in an acid solution for a period of <1 upto 24 hours at a temperature of about 23° C. and at a strain level selected from the group consisting of 0%, 0.5%, 1.0%, and combinations thereof;
• wherein the acid solution is selected from the group consisting of sulfuric acid, nitric acid, phosphoric acid, formic acid, acetic acid, and combinations thereof, and wherein the acid solution has a concentration of at least 20%.