Carbonate polymer compositions comprising low volatile UV absorbers

A carbonate polymer composition comprising:

• (a) a carbonate polymer and
• (b) at least two UV absorbing compounds selected from:
• (i) 2,2′-methylene-bis-(6-{2H-benzotriazol-2-yl}-4-{1,1,3,3-tetramethylbutyl}-phenol),
• (ii) 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxyphenol, or
• (iii) 1,3-bis-[(2′-cyano-3′,3′-diphenylacryloyl)oxy]-2,2-bis-[(2-cyano-3′,3′-diphenylacryloyl)oxy]methyl)propane.

A process for preparing a carbonate polymer composition which comprises the step of combining:

• (a) a carbonate polymer and
• (b) two or more UV absorbing compounds selected from two or more of the following groups:
• (i) a hydroxybenzotriazole derivative,
• (ii) a hydroxyphenyltriazine derivative, or
• (iii) a cyanoacrylic acid ester compound
• wherein all UV absorbing compounds (i), (ii) and (iii) have a molecular weight of at least 400 g/mol.

A process for producing an extruded or molded article of a carbonate polymer composition comprising the steps of:

• (A) preparing a carbonate polymer composition which comprises the step of combining:
• (a) a carbonate polymer and
• (b) two or more UV absorbing compounds selected from two or more of the following groups:
• (i) a hydroxybenzotriazole derivative,
• (ii) a hydroxyphenyltriazine derivative, or
• (iii) a cyanoacrylic acid ester compound
• wherein all UV absorbing compounds (i), (ii) and (iii) have a molecular weight of at least 400 g/mol, and
• (B) extruding or molding the carbonate polymer composition into an extruded or molded article.