An ethylenically unsaturated polymer includes at a terminus the radical of an allylic compound that includes a functional group free of active hydrogen atoms that is bonded to the allylic C atom through a S, P, Si or Sn atom and a vinyl aromatic compound. The polymer can be used as a component of a variety of elastomeric compounds used in the production of vulcanizates.

Cyclic organosilicon compounds having a structure represented by the general formula ##STR00001##
and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.

Cyclic organosilicon compounds having a structure represented by the general formula

##STR00001##

and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.

One aspect of the invention includes a glass powder for a chemical polymerization initiator, the glass powder including aluminum, silicon, and at least one of copper or vanadium.

One aspect of the invention includes a glass powder for a chemical polymerization initiator, the glass powder including aluminum, silicon, and at least one of copper or vanadium.

The present invention relates to an organic borate-based catalyst including a compound represented by the following Formula 1 and a hydroxyl group-containing compound, a method for preparing an isobutene oligomer using the same and an isobutene oligomer prepared thereby:

##STR00001##

wherein R.sub.0, R.sub.1 to R.sub.4, o, p, q and r are described therein.

The present invention relates to an organic borate-based catalyst including a compound represented by the following Formula 1 and a hydroxyl group-containing compound, a method for preparing an isobutene oligomer using the same and an isobutene oligomer prepared thereby:

##STR00001##

wherein R.sub.0, R.sub.1 to R.sub.4, o, p, q and r are described therein.

A catalyst system comprising a combination of a tin-based moisture-cure catalyst, a titanium(IV) compound that is titanium dioxide or a titanium alkoxide, and zinc oxide. A catalyst masterbatch comprising the catalyst system and a carrier resin. A moisture-curable prepolymer formulation comprising the catalyst masterbatch and a (hydrolyzable silyl group)-functional polyolefin prepolymer. Methods of making and using same. Cured polymer products made therefrom. Articles containing or made from same.

A catalyst system comprising a combination of a tin-based moisture-cure catalyst, a titanium(IV) compound that is titanium dioxide or a titanium alkoxide, and zinc oxide. A catalyst masterbatch comprising the catalyst system and a carrier resin. A moisture-curable prepolymer formulation comprising the catalyst masterbatch and a (hydrolyzable silyl group)-functional polyolefin prepolymer. Methods of making and using same. Cured polymer products made therefrom. Articles containing or made from same.

Processes of polymerizing olefin monomers. The process comprising reacting ethylene and optionally one or more olefin monomers in the presence of a catalyst system, wherein the catalyst system comprises: an activator; hydrocarbyl-modified methylaluminoxane having less than 25 mole percent trihydrocarbyl aluminum compounds AlR.sup.A1R.sup.B1R.sup.C1 based on the total moles of aluminum, where R.sup.A1, R.sup.B1, and R.sup.C1 are independently linear (C.sub.1-C.sub.40)alkyl, branched (C.sub.1-C.sub.40)alkyl, or (C.sub.6-C.sub.40)aryl; and one or more metal-ligand complexes according to formula (1):

##STR00001##