Wednesday, April 27, 2011

US Patent 7932314 - Electrically conductive thermoplastic polymer with CNTs

This patent is from Ovation Polymer Technology and Engineered Materials and teaches a material composition used in the manufacture of an actuator for a hard disk drive including carbon nanotubes. Claim 1 reads:

1. A thermoplastic polymer composition which is comprised of

(1) from 10 weight percent to 90 weight percent polycarbonate,

(2) from 1 weight percent to 6 weight percent carbon nanotubes,

(3) from 5 weight percent to 85 weight percent of a polyethersulfone polymer,

(4) from 0.5 weight percent to 10 weight percent of a functionalized rubbery polymer, and

(5) from 0.5 weight percent to 5 weight percent of high density polyethylene as a lubricant, wherein all weight percentages are based upon the total weight of the thermoplastic polymer composition.