摘要:
The application of trinuclear nickel clusters as air-stable catalysts for the production of specific polymer architectures ( e.g . syndiotactic polystyrene: sPS, or syndiotactic polymethylmethacrylate), from polar and apolar monomers under energy efficient ( i.e ., room temperature: RT) conditions using minimal amounts of aluminium- based co-catalysts ( e.g ., MAO), is described. This novel process represents the first air- stable Ni-based system for the synthesis of stereo-regular vinyl polymers and hence is a "greener" and more cost-effective catalyst technology for the production of such industrially useful polymers.
摘要:
A quaternary ammonium sulfonamide compound of formula (I): wherein R = (II), C 1 -C 3 linear or branched alkyl, R 1 and R 2 are the same or different and selected from C 1 to C 18 linear or branched alkyl, R 3 and R 4 are the same or different and selected from C 1 to C 4 linear or branched alkyl, CF 3 , OR 5 where R 5 is C 1 to C 8 linear or branched alkyl or polyethylene oxide, l is 1, 2, 3, 4, 5, 6, 7 or 8, m is 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 or 17, n is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18, wherein the aryl groups of R may be substituted or unsubstituted, X = halogen, and Y = (III) wherein R 6 , R 7 , R 8 , R 9 and R 10 are the same or different and selected from C 1 to C 6 linear or branched alkyl and the benzophenone is selected from the group consisting of substituted benzophenone and unsubstituted benzophenone, processes for preparing the compound and antimicrobial surface coating compositions of the compound.
摘要:
The present invention relates to antimicrobial compositions containing mono-, bis-, tri- or tetra- phosphonate quaternary ammonium compounds and surfaces coated with such compositions which demonstrate antimicrobial activity against a variety of gram positive and gram negative bacteria including, but not limited to, Staphylococcus , Pseudomonas,Klebsiella, Salmonella, Listeria, Arthrobacte r and Escherichia .