Patent ID: 7723414

Claim:
A shaped polymer article having improved surface resistivity comprising a major proportion of a thermoplastic polymer and a minor proportion of an antistatic system, wherein the antistatic system comprises an inorganic oxide having a surface treatment comprising (a) an ethoxylated alkylamine defined by the formula: R 1 N—(CH 2 CH 2 OH) 2 wherein R 1 is a C 8 to C 30 alkyl radical and (b) a polyoxyalkylene siloxane defined by the formula: (R 2 ) 3 SiOSi(R 2 )(R 3 )OSi(R 2 ) 3 wherein each R 2 is independently H, CH 3 or C 2 H 5 ; R 3 is a polyoxyalkylene group having the following formula: —C n H 2n OZR 4 wherein Z is [ethylene oxide] a [propylene oxide] b in block or random order; n is independently an integer of 2 to 8; a is an integer of 0 to about 20; b is an integer of 0 to about 30; provided that a+b is from 1 to about 50; R 4 is independently H, OH, OCH 3 , acetyl, or a linear or branched alkyl or aryl group having 1 to about 20 carbon atoms.