Resources Contact Us Home
Polymeric medium

Image Number 11 for United States Patent #8129498.

A PBI compound includes imidazole nitrogens at least a portion of which are substituted with a moiety containing a carbonyl group, the substituted imidazole nitrogens being bonded to carbon of the carbonyl group. At least 85% of the nitrogens may be substituted. The carbonyl-containing moiety may include RCO--, where R is alkoxy or haloalkyl. The PBI compound may exhibit a first temperature marking an onset of weight loss corresponding to reversion of the substituted PBI that is less than a second temperature marking an onset of decomposition of an otherwise identical PBI compound without the substituted moiety. The PBI compound may be included in separatory media. A substituted PBI synthesis method may include providing a parent PBI in a less than 5 wt % solvent solution. Substituting may use more than 5 equivalents in relation to the imidazole nitrogens to be substituted.

  Recently Added Patents
Radiation-emitting semiconductor chip and method for producing a radiation-emitting semiconductor chip
Autobrake and decel control built-in test equipment
Heterocyclic compounds as CCR2B antagonists
Image quality assessment
Modified and stabilized GDF propeptides and uses thereof
Surface acoustic wave resonator for down-hole applications
Bull stationery tab
  Randomly Featured Patents
Human dickkopf-related protein and nucleic acid molecules and uses therefor
Traction fluid and traction drive system containing said fluid
Method for reducing internal stresses of roller straightened rails
Piston-shoe arrangement for a swash plate compressor
Information processing method and apparatus, and computer-readable program
Image processing apparatus and method
Static-type mixer and receptacle
High-strength ductile uranium alloy
Disposable holder for surgical knife blade