Abstract: A salt of formula (I) [HEoR13]+[T1T2]? ??(I) wherein Eo is a nitrogen or phosphorous atom; R1 is hydrocarbon radical; T1 is a Lewis acid that forms a complex with T2, and T2 is a substituted pyrrolyl radical of formula (III) These salts can be used as cocatalyst in a process for the polymerization of alpha-olefins in conjunction with a transition metal organometallic compound.

Abstract: The invention provides a process using olefin polymerization catalysts exhibiting excellent polymerization activities. The olefin polymerization catalysts of the invention contain a transition metal compound typified by formula (I) and at least one of an organometallic compound, an organoaluminum oxy-compound or a compound which reacts with said transition metal compound to form an ion pair.

Abstract: Process for preparing an olefin polymerisation catalyst component in the form of particles having a predetermined size range, said process comprising the steps of a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said metal with said electron donor or a precursor thereof in an organic liquid reaction medium; b) adding said solution of said complex to at least one compound of a transition material to produce an emulsion, the dispersed phase of which contains more than 50 mol % of the Group 2 metal in said complex; c) agitating the emulsion, optionally in the presence of an emulsion stabilizer, in order to maintain the droplets of said dispersed phase within the average size range 5 to 200 m; d) solidifying said droplets of the dispersed phase; and e) recovering the solidified particles of the olefin polymerisation catalyst component, wherein a turbulence minimizing agent (TMA) is added to the reaction mixture before solidifying said droplets of the disperse

Abstract: A compound of the formula Ia or Ib; where, in the formula Ia, E1 is O, S, Se, Te, NR, CR2, or PR; E2, E3 are each CR, N, or P; E4 is N, or P; E5 is OH, SH, NHR, OR?, SR?, or NRR?; E6 is NH, PH, NR?, or PR?; R5, R6 are each hydrogen or a linear, branched or cyclic alkyl radical or an aryl radical; R1, R2, R3, R4 are each hydrogen, a linear, branched or cyclic alkyl radical, an aryl radical, a halogen or a nitro group; R is hydrogen, a linear, branched or cyclic alkyl radical; R? is a linear, branched or cyclic alkyl radical; where at least one of the groups E5 and E6 contains a hydrogen atom; and in the formula Ib, the symbols E1, E4, E5, E6, R5, R6, R1, R2, R3, R4, R and R? are as defined in formula Ia; and E?2 and E?3 are each O, S, Se, Te, NR, CR2, or PR.

Abstract: A shelter coating comprising polyvinyl alcohol and polyethyleneimine is disclosed. The shelter coating may optionally further include a photocatalyst capable of generating singlet oxygen from ambient air. The shelter coating may optionally include a singlet oxygen scavenger.

Abstract: A process for producing a Gp 2/transition metal olefin polymerisation catalyst component, in which a Gp 2 complex is reacted with a transition metal compound so as to produce an oil-in-oil emulsion, the disperse phase containing the preponderance of the Gp 2 metal being selectively sorbed on a carrier to provide a catalyst component of excellent morphology. Polymerisation of olefins using a catalyst containing such a component is also disclosed.