Composition containing thermoplastic polymers

A process of using a mixture containing 0.1 to 15 parts by weight,

• one or more compounds of Formula (I):
• wherein
• R1 and R2 independently denote H, halogen, C1- to C10-alkyl, C5- to C10-cycloalkyl, C7- to C13-aralkyl, C6- to C14-aryl, —OR5 or —(CO)—O—R5, where
• R5 is H or C1- to C4-alkyl,
• R3 and R4 independently denote H, C1- to C4-alkyl, C5- to C6-cycloalkyl, benzyl or C6- to C14-aryl,
• m is 1, 2 or 3 and n is 1, 2, 3 or 4,
• and 0.0001 to 0.4 parts by weight of one or more compounds of Formula (II)
• wherein
• R and X independently denote H, alkyl or alkylaryl,
• comprising obtaining a thermoplastic resin, mixing said resin with said mixture to obtain a composition and extruding said composition to obtain a sheet having good surface quality.

A molding composition containing a thermoplastic polymer and 0.1 to 15 wt. % of one or more compounds of Formula (III):

• wherein
• R1 and R2 independently denote H, halogen, C1- to C10-alkyl, C5- to C10-cycloalkyl, C1- to C13-aralkyl, C6- to C14-aryl, —OR5 or —(CO)—O—R5, where
• R5 is H or C1- to C4-alkyl,
• m is 1, 2 or 3 and
• n is 1, 2, 3 or 4,
• the bridge represents
• wherein
• p is equal to 0, 1, 2 or 3,
• q is an integer from 1 to 10,
• Y is —CH2—CH2—, —(OH2)3—, —(CH2)4—, —(OH2)5—, —(CH2)6—, or CH(CH3)—CH2— and
• R10 and R11 independently denote H, C1- to C4-alkyl, C5- to C6-cycloalkyl, benzyl or C6- to C14-aryl,
• and 0.0001 to 0.4 wt. % of one or more compounds of Formula (II):
• wherein
• R and X independently denote H, alkyl or alkylaryl, the percent, both occurrences being relative to the weight of the composition.