An object of the present invention is to provide a novel method of producing a nonpolar olefin polymer (e.g., a copolymer of a nonpolar olefin and a polar olefin). The present invention provides a method of producing a polar olefin polymer or copolymer, the method including the polymerization step of polymerizing a polar olefin monomer using, as a catalyst, a polymerization catalyst composition containing: 1) a metallocene complex represented by Formula (I), which contains a central metal M that is scandium (Sc) or yttrium (Y), a ligand Cp* containing a cyclopentadienyl derivative and being bound to the central metal, monoanionic ligands Q.sup.1 and Q.sup.2, and W neutral Lewis bases L wherein W is an integer of 0 to 3; and 2) an ionic compound composed of a non-coordinating anion and a cation. ##STR00001## ##STR00002##

Disclosed herein are isotactic polyvinyl ethers and improved methods of making same. The method disclosed herein can produce polyvinyl ethers having a higher isotacticity as compared to polyvinyl ethers prepared with conventional methods.

A method of producing a homopolymer or random copolymer of hydroxyl group-containing vinyl ether by polymerizing a monomer component comprising at least one hydroxyl group-containing vinyl ether using an oil-soluble radical polymerization initiator in the absence or presence of a solvent.

Disclosed herein are isotactic polyvinyl ethers and improved methods of making same. The method disclosed herein can produce polyvinyl ethers having a higher isotacticity as compared to polyvinyl ethers prepared with conventional methods.

A polymer, an organic layer composition, and a method of forming patterns, the polymer including a structural unit represented by Chemical Formula 1 or Chemical Formula 2:

##STR00001##

A polymer, an organic layer composition, and a method of forming patterns, the polymer including a structural unit represented by Chemical Formula 1 or Chemical Formula 2:

##STR00001##

An object of the present invention is to provide a novel method of producing a nonpolar olefin polymer (e.g., a copolymer of a nonpolar olefin and a polar olefin). The present invention provides a method of producing a polar olefin polymer or copolymer, the method including the polymerization step of polymerizing a polar olefin monomer using, as a catalyst, a polymerization catalyst composition containing: 1) a metallocene complex represented by Formula (I), which contains a central metal M that is scandium (Sc) or yttrium (Y), a ligand Cp* containing a cyclopentadienyl derivative and being bound to the central metal, monoanionic ligands Q.sup.1 and Q.sup.2, and W neutral Lewis bases L wherein W is an integer of 0 to 3; and 2) an ionic compound composed of a non-coordinating anion and a cation.

##STR00001## ##STR00002##

A thickening composition includes a polymer (A) comprising a repeating unit (A1) represented by the formula (a1) and a solvent (B), all of which are defined herein.

A thickening composition includes a polymer (A) comprising a repeating unit (A1) represented by the formula (a1) and a solvent (B), all of which are defined herein.