Willem Sjardijn

TL;DR: An olefin polymerization process comprises contacting the monomer to be polymerized with a catalyst composition comprising: an organoaluminum compound, a first electron donor, and a product obtained by contacting a solid component comprising a magnesium halide in which the atomic ratio of chlorine to magnesium is at least 1.2 as discussed by the authors.

TL;DR: In this paper, a process for the polymerization of norbornene derivatives is described, which comprises contacting the monomer(s) with a catalytic system comprising the following two components: (1) a tungsten compound which is the product of combining a Tungsten halide with a para-trihalomethylphenol, and (2) a compound of the general formula: ##STR2## in which at least two of R1, R2 and R3 are selected from unsubstituted and substituted C1-20 hydrocarby

TL;DR: In this paper, a process for the preparation of violet TiCl 3 by reducing TiCl 4 with an organo-aluminum compound, characterized in that: (a) the TiCl4 is premixed with a complexing agent in an inert organic solvent, the molar ratio complexing agents:TiCl 4 being within the range from 0.3:1 to 2:1; (b) the organo aluminum compound is pre-mixed with an inert O-Aluminum compound.

TL;DR: Titanium trichloride-containing compositions for use as catalyst component in stereoregular olefin polymerization are prepared by gradual addition of a solution of titanium tetrachloride to a trialkyl aluminum in certain low-boiling inert diluents.

TL;DR: In this paper, a process for the production of thermoset copolymers having tailored product properties such as high glass transition temperature and/or increased cross-linking is described.