Compatibilized compositions, articles formed therefrom, and methods of manufacture

A thermoplastic composition comprising:

• a polycarbonate terpolymer comprising first repeating units, second repeating units different from the first repeating units, and third repeating units different from the first and second repeating units;
• and wherein
• the first repeating units are phthalimidine carbonate units of the formula
• wherein
• Ra and Rb are each independently a C1-12 alkyl, C2-12 alkenyl, C3-8 cycloalkyl, or C1-12 alkoxy,
• each R3 is independently a C1-6 alkyl,
• R4 is hydrogen, C2-6 alkyl or phenyl optionally substituted with 1 to 5 C1-6 alkyl groups,
• p, q, and j are each independently 0 to 4;
• the second repeating units are carbonate units of the formula
• wherein
• Rc and Rd are each independently a C1-12 alkyl, C2-12 alkenyl, C3-8 cycloalkyl, or C1-12 alkoxy,
• each R6 is independently C1-3 alkyl or phenyl,
• Xa is a C6-12 polycyclic aryl, C3-18 mono- or polycycloalkylene, C3-18 mono- or polycycloalkylidene, (Q1)x-G-(Q2)y- group wherein Q1 and Q2 are each independently a C1-3 alkylene, G is a C3-10 cycloalkylene, x is 0 or 1, and y is 1;
• and
• m and n are each independently 0 to 4;
• and
• the third repeating units are carbonate units of the formula
• wherein
• Re and Rf are each independently C1-12 alkyl, C2-12 alkenyl, C3-8 cycloalkyl, or C1-12 alkoxy,
• a and b are each independently integers of 0 to 4, and
• Xb is a single bond, —O—, —S—, —S(O)—, —S(O)2—, —C(O)—, or C1-32 bridging hydrocarbon group, provided that Xb is not a phthalimidine group or Xa;
• and
• a second polycarbonate component, wherein the second polycarbonate component comprises
• a first copolycarbonate consisting of bisphenol A carbonate units and first additional carbonate units of the formula
• wherein
• Rc and Rd are each independently a C1-12 alkyl, C2-12 alkenyl, C3-8 cycloalkyl, or C1-12 alkoxy,
• each R6 is independently C1-3 alkyl or phenyl,
• Xa is a a C6-12 polycyclic aryl, C3-18 mono- or polycycloalkylene, C3-18 mono- or polycycloalkylidene, (Q1)x-G-(Q2)y- group wherein Q1 and Q2 are each independently a C1-3 alkylene, G is a C3-10 cycloalkylene, x is 0 or 1, and y is 1;
• and
• m and n are each independently 0 to 4;
• or a second copolycarbonate consisting of bisphenol A carbonate units and second additional carbonate units of the formula
• wherein
• Ra and Rb are each independently a C1-12 alkyl, C2-12 alkenyl, C3-8 cycloalkyl, or C1-12 alkoxy,
• each R3 is independently a C1-6 alkyl,
• R4 is hydrogen, C1-6 alkyl or phenyl optionally substituted with 1 to 5 C1-6 alkyl groups,
• p, q, and j are each independently 0 to 4,
• or a combination comprising the first copolycarbonate and the second copolycarbonate,
• wherein the composition has a haze of less than 15% and a transmission greater than 75%, each measured using the color space CIE1931 with Illuminant C and a 2° observer at a 3.2 mm thickness.