A catalyst for olefin polymerization containing at least one metal complex comprising at least one —SF.sub.5 group attached to a ligand bound to the metal. The invention further relates to catalyst, a process for making polyolefins and dispersions of UHMWPE.

The present disclosure relates to a multi- or dual-headed composition having the formula (I) or (II). The present disclosure also relates to a process for preparing the multi- or dual-headed composition having the formula (I) or (II), the process including combining 1,2,4-trivinylcyclochexane, an organometallic compound, and a catalyst precursor. The present disclosure further relates to use of the composition having the formula (I) or (II) in olefin polymerization.

The present disclosure relates to a multi- or dual-headed composition having the formula (I) or (II). The present disclosure also relates to a process for preparing the multi- or dual-headed composition having the formula (I) or (II), the process including combining 1,2,4-trivinylcyclochexane, an organometallic compound, and a catalyst precursor. The present disclosure further relates to use of the composition having the formula (I) or (II) in olefin polymerization.

Embodiments are directed to monophosphaguanidine ligands and the bis ligated metal-complexes formed therefrom, wherein the metal-ligand complexes are polymerization catalysts comprising the following structure (I). ##STR00001##

Embodiments are directed to monophosphaguanidine ligands and the bis ligated metal-complexes formed therefrom, wherein the metal-ligand complexes are polymerization catalysts comprising the following structure (I). ##STR00001##

A polyorganosiloxane hot melt adhesive composition includes a polyolefin-polydiorganosiloxane block copolymer, a polydiorganosiloxane, and a polyorganosilicate resin. The hot melt adhesive composition is useful in electronic device assembly processes.

A polyorganosiloxane hot melt adhesive composition includes a polyolefin-polydiorganosiloxane block copolymer, a polydiorganosiloxane, and a polyorganosilicate resin. The hot melt adhesive composition is useful in electronic device assembly processes.

Embodiments of this disclosure are directed to ethylene-based polymers. The ethylene-based polymers are polymerized units derived from ethylene, diene, and optionally one or more C.sub.3-C.sub.12α-olefins. The ethylene-based polymer includes a melt strength greater than negative 17 times the log base 10 of the melt index plus 25 ((MS)>−17*log (MI)+25). In the equation, MS is the melt strength in cN and MI is the melt index in g/10 min according to ASTM D1238. The ethylene-based polymer also includes an average g′ that is greater than 0.70. The average g′ is an intrinsic viscosity ratio determined by gel permeation chromatography using a triple detector.

The present disclosure relates to a catalyst system for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first olefin polymerization procatalyst, (B) a second olefin polymerization procatalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by procatalyst (A) under equivalent polymerization conditions, (C) an activator, and (D) a chain shuttling agent.

The present disclosure relates to a catalyst system for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first olefin polymerization procatalyst, (B) a second olefin polymerization procatalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by procatalyst (A) under equivalent polymerization conditions, (C) an activator, and (D) a chain shuttling agent.