Process for production of high-isoprene butyl rubber.U.S. patent: 7,282,548
Issued: October 16, 2007
Inventors: R. Resendes, Gabor Kaszas, Mark J. Drewitt, Stephan Glander, Gerhard Langstein and Martin Bohnenpoll
Key statement: A continuous process for producing polymers at conversions ranging from 50% to 95% having a Mooney viscosity of at least 25 Mooney-units and a gel content of less than 15 wt. % containing repeating units derived from at least one isoolefin monomer monomer (mŏn`əmər): see polymer.
Molecule of any of a class of mostly organic compounds that can react with other molecules of the same or other compounds to form very large molecules (polymers). , more than 4.1 mol % of repeating units derived from at least one multiolefin monomer and optionally further copolymerizable monomers in the presence of Al[Cl.sub.3] and a suitable proton proton, elementary particle having a single positive electrical charge and constituting the nucleus of the ordinary hydrogen atom. The positive charge of the nucleus of any atom is due to its protons. source (e.g., water) or cationogen, and at least one multiolefin crosslinking agent, wherein where·in
In what way; how: Wherein have we sinned?
1. In which location; where: the country wherein those people live.
2. the process is conducted in the absence of transition metal compounds and organic nitro compounds nitro compound
Any of a class of chemical compounds in which the nitro group (−NO2) forms part of the molecular structure. The most common examples are organic compounds, isomers of nitrite esters in which a carbon atom is linked by a covalent bond to the .