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
Method and system to generate finite state grammars using sample phrases
Bandpass filter and radio communication module and radio communication device using the same
Adjustable voltage regulator with dynamic voltage compensation
Pressure washer
Sealed, waterproof digital electronic camera system and method of fabricating same
Rechargeable battery
Method and apparatus for triggering expiration of a data tag device
  Randomly Featured Patents
Pipe holder
Mono crystalline diamond cutting tool for ultra precision machining
Air conditioner
Maltyl-2-methyl alkenoates and novel perfume compositions and perfumed articles containing same
Portable airborne firefighting and sensing system
Consumer rewards systems and methods
Apparatus, method, and computer product for estimating power consumption of LSI
Load management terminal having plural selectable address formats for a power line communication system
Fastening assembly for fabric