Abstract:
A process for preparing an electronically-conductive thermoplastic composition having at least two phases, which includes (I) combining an amorphous or semi-crystalline thermoplastic polymer or miscible blend of polymers with an electronically-conductive carbon under conditions sufficient to disperse the conductive carbon, thereby forming a mixture having at least one phase, with at least 60 percent of the carbon dispersed in a first phase which comprises at least 90 percent by weight of the mixture; and (II) combining the mixture obtained from step (I) with an amorphous or semi-crystalline thermoplastic polymer or miscible blend of polymers, at least a portion of which is immiscible in the first phase, thereby forming a composition having at least two phases. Compositions prepared by this process are sufficiently conductive to be useful for a variety of applications, such as structural materials for applications requiring electromotively-paintable substrates.
Abstract:
A process has been invented for removing contaminants (including solvent) from a flowing polymer, the process, in one aspect, including dissolving a sparingly soluble stripping agent into a flowing polymer, the sparingly soluble stripping agent stripping contaminants from the flowing polymer creating a mixture of contaminants and sparingly soluble stripping agent, which flows out from the flowing polymer, and separating the mixture from the polymer. In one aspect, recyclable sparingly soluble stripping agent is recovered and re-used.
Abstract:
This invention is a chemical reactor and method for synthesis of hydrogen peroxide from molecular hydrogen and oxygen. The chemical reactor comprises a polymeric solution-diffusion membrane having a hydrogen contact side and an oxygen contact side and chambers for placing the relevant reactants in contact with the membrane. Conditions are provided such that a preferred flux of molecular hydrogen across the polymeric solution-diffusion membrane is at least five times greater than flux of the molecular oxygen across the membrane. The chemical reactor and method may be used to controllably synthesize hydrogen peroxide directly from molecular hydrogen and oxygen outside of the explosive range, without the use of organic solvents or complex equipment for ionic and electrical transport.
Abstract:
Various 5H-pyrrolo(3',4':5,6)(1,4)dithiino-(2,3-C)(1,2,5)thiadiazole-5,7(6H)-diones corresponding to formula (I) wherein R represents -H, benzyl, phenethyl, a C1-C10 straight or branched chain alkyl radical, a C3-C10-cycloalkyl radical, a C1-C10 straight or branched chain alkoxy radical, a C3-C10-cycloalkoxy, an ester of the formula -CH2CH2O-C(O)-R , wherein R represents a C1-C6 straight or branched chain alkyl radical or a C3-C6 cycloalkyl radical or R represents phenyl substituted with from 0-5 halo, C1-C6 straight or branched chain alkyl, cyano, nitro groups, or an ester of the formula -OC(O)-R , wherein R represents a C1-C6 straight or branched chain alkyl radical or a C3-C6 cycloalkyl radical or an amide of the formula -C(O)-N(R )x, wherein each R independently represents a C1-C6 straight or branched chain alkyl radical or a C3-C6 cycloalkyl radical are disclosed. These compounds have been found to exhibit antimicrobial and marine antifouling activity in industrial and commercial applications and compositions containing these compounds are so employed.
Abstract:
A process and catalyst for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and a catalyst. The catalyst comprises gold on a support of titanium dispersed on silica. The titanium phase is disorganized and substantially free of crystalline titanium dioxide, as determined by analytical methods, such as high resolution transmission electron microscopy and Raman spectroscopy. Selectivity to olefin oxide is high at good conversions of the olefin. The time between catalyst regenerations is long, and the catalyst is readily regenerated.
Abstract:
A process for the oxidation of a fluorene compound to a corresponding fluorenone compound comprises treating the fluorene compound with an oxidizing gas in the presence of a solid alkali metal or alkaline earth metal oxide or hydroxide or a concentrated aqueous solution thereof in a reaction mixture containing a non-aqueous heterocyclic nitrogenous solvent, wherein the reaction mixture is free of a phase transfer agent, for a time sufficient and at a temperature sufficient to convert the fluorene compound to the fluorenone compound.
Abstract:
The present invention is a free radical bulk polymerization process for producing a rubber modified polymer from a vinyl aromatic monomer comprising: polymerizing the vinyl aromatic monomer in the presence of a diene rubber having at least one stable free radical group, under polymerization conditions such that a vinyl aromatic-diene block and/or graft copolymer rubber is formed.
Abstract:
Boratabenzene cocatalysts, especially novel pentafluorophenyl boratabenzenes, are useful cocatalysts or activators with metallocenes. They are less expensive than prior art activators, are soluble and offer more irreversible reactions. Compositions comprise at least one metallocene catalyst and at least one dihydroboratabenzene or anion thereof. Processes include polymerizations with metallocenes in the presence of boratabenzene cocatalyst and activation process including bulk electrolysis techniques.
Abstract:
The present invention is a compound of formula (I) wherein T is a group which will either 1) react with a polydienyl lithium such that the polydiene will be terminated with the compound of formula (I), or 2) be displaced by a polydienyl anion placing the molecule attached to T on the polydiene chain-end, Ar is an aromatic group having 1 or 2 aromatic rings, R, R and R are each independently hydrogen or a C1-6 alkyl group, and R , R , R , R , R and R are each independently phenyl, C1-C6 alkyl, or alternatively, 2 groups selected from R -R may combine such that a 5- or 6-membered ring containing the N of the nitroxyl group is formed.
Abstract:
Metal complexes, addition polymerisation catalysts containing the same and olefin polymerisation processes using the same comprising a boratabenzene group or divalent derivative thereof are disclosed.