A metal complex of the formula (1) TCyLMZ.sub.p (1), wherein M is a group 4 metal, Z is an anionic ligand, p is the number 1 or 2, TCy is a thiophene-fused cyclopentadienyl-type ligand of the formula (2) ##STR00001##
is described. Methods of making and using the metal complex are also described.

A metal complex of the formula (1) TCyLMZ.sub.p (1), wherein M is a group 4 metal, Z is an anionic ligand, p is the number 1 or 2, TCy is a thiophene-fused cyclopentadienyl-type ligand of the formula (2) ##STR00001##
is described. Methods of making and using the metal complex are also described.

In some embodiments, ethylene-propylene random copolymers as viscosity modifiers were synthesized with pyridyldiamido catalyst systems and a chain transfer agent. In some embodiments, the present disclosure provides for ethylene-propylene random copolymers having an ethylene content between about 45 wt % and about 55 wt %. In some embodiments, the ethylene-propylene random copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

In some embodiments, ethylene-propylene random copolymers as viscosity modifiers were synthesized with pyridyldiamido catalyst systems and a chain transfer agent. In some embodiments, the present disclosure provides for ethylene-propylene random copolymers having an ethylene content between about 45 wt % and about 55 wt %. In some embodiments, the ethylene-propylene random copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

In some embodiments, ethylene-propylene random copolymers as viscosity modifiers were synthesized with pyridyldiamido catalyst systems and a chain transfer agent. In some embodiments, the present disclosure provides for ethylene-propylene random copolymers having an ethylene content between about 45 wt % and about 55 wt %. In some embodiments, the ethylene-propylene random copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

The present application relates to a polypropylene composition having a melt flow rate MFR.2 (230° C.) measured according to ISO 1133 in the range of 5 to 50 g/10 min, to a composition comprising the polypropylene composition and one or more additive(s) in an amount of up to 4 wt.-%, based on the total weight of the composition, to a process for the preparation of the polypropylene composition and an article comprising the polypropylene composition as well as the use of the polypropylene composition for decreasing the brittle-to-ductile transition temperature.

The present application relates to a polypropylene composition having a melt flow rate MFR.2 (230° C.) measured according to ISO 1133 in the range of 5 to 50 g/10 min, to a composition comprising the polypropylene composition and one or more additive(s) in an amount of up to 4 wt.-%, based on the total weight of the composition, to a process for the preparation of the polypropylene composition and an article comprising the polypropylene composition as well as the use of the polypropylene composition for decreasing the brittle-to-ductile transition temperature.

The present application relates to a polypropylene composition having a melt flow rate MFR.2 (230° C.) measured according to ISO 1133 in the range of 5 to 50 g/10 min, to a composition comprising the polypropylene composition and one or more additive(s) in an amount of up to 4 wt.-%, based on the total weight of the composition, to a process for the preparation of the polypropylene composition and an article comprising the polypropylene composition as well as the use of the polypropylene composition for decreasing the brittle-to-ductile transition temperature.

This disclosure describes compositions, kits, methods, systems, and three-dimensional parts. According to an example, described herein is a method of forming a polymeric powder build material composition for three-dimensional printing, the method comprising mixing a thermoplastic polymer powder composition, antioxidants, flow aids, a surface modifying agent, antistatic agents, and filler.

This disclosure describes compositions, kits, methods, systems, and three-dimensional parts. According to an example, described herein is a method of forming a polymeric powder build material composition for three-dimensional printing, the method comprising mixing a thermoplastic polymer powder composition, antioxidants, flow aids, a surface modifying agent, antistatic agents, and filler.