Polymer composition obtained from polymerization of C.sub.5 olefin composition, use for making an adhesive, and article or composite containing it.

Polymer composition obtained from polymerization of C.sub.5 olefin composition, use for making an adhesive, and article or composite containing it.

Polymer composition obtained from polymerization of C.sub.5 olefin composition, use for making an adhesive, and article or composite containing it.

The present invention relates to a novel process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 70 mol %. The present invention further relates to novel isobutene polymers.

The present invention relates to a novel process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 70 mol %. The present invention further relates to novel isobutene polymers.

Disclosed are a polyolefin having a high molecular weight by using a novel metallocene catalyst; a method for preparing the polyolefin by using the same; and a method for preparing an ethylene-propylene random copolymer having high molecular weight, high syndiotacticity and small crystal size, thereby providing injection molded articles with improved transparency. The present invention provides a transition metal compound represented by chemical formula 1: ##STR00001##

Disclosed are a polyolefin having a high molecular weight by using a novel metallocene catalyst; a method for preparing the polyolefin by using the same; and a method for preparing an ethylene-propylene random copolymer having high molecular weight, high syndiotacticity and small crystal size, thereby providing injection molded articles with improved transparency. The present invention provides a transition metal compound represented by chemical formula 1: ##STR00001##

Polymer composition obtained from polymerization of C.sub.5 olefin composition, use for making an adhesive, and article or composite containing it.

Polymer composition obtained from polymerization of C.sub.5 olefin composition, use for making an adhesive, and article or composite containing it.

Polymer composition obtained from polymerization of C.sub.5 olefin composition, use for making an adhesive, and article or composite containing it.