Abstract: A halogenated aluminum-based cocatalyst provides a metathesis catalyst system with high activity, moisture insensitivity, and long pot lives. The cocatalyst can be employed in solution or in in-mold bulk polymerization processes.

Abstract: A highly polymerizable dicyclopentadiene (DCPD) monomer composition is obtained. The dicyclopentadiene so obtained is highly suitable for ring-opening polymerization by metathesis catalysts. The active DCPD yields articles with excellent physical properties upon in-mold polymerization.

Abstract: A reaction solution comprising a mixture of tricyclopentadiene, a norbornene monomer with at least 3 rings in its backbone, a 5-alkenyl-2-norbornene pot life adjusting agent along with a molybdenum type catalyst system gives prolonged pot life without extending time to exotherm (e.g., smoking time). By utilizing this reaction solution it is possible to bulk polymerize reinforced or unreinforced articles in a mold via ring-opening polymerization. Articles so obtained have good outward appearance and excellent physical properties.

Abstract: Described herein is an oily, transparent reaction product which is prepared by heat treating at 110.degree.-220.degree. C. a dicyclopentadiene and a vinyl aromatic compound. This reaction product can be polymerized by ring-opening in presence or absence of a norbornene monomer to produce a thermoset polymer. Freezing point of the reaction product is below 10.degree. C.

Abstract: This invention relates to a composite molded article where a polymer film of superior weather resistance, adhesion and surface smoothness is made into an integral composite body on the surface of polynorbornene base material by utilizing reaction injection molding in combination with an in-mold coating process. By means of this invention, it is possible to manufacture three dimensional composite molded articles, composite molded articles of complex shapes and deep-drawn composite molded articles. The composite molded articles of this invention can be used for a variety of purposes, such as automobile parts, electrical parts, construction, etc.

Abstract: An organic fluorine compound as a mold release agent wherein at least one norbornene compound is polymerized by ring opening in a mold coated with said release agent. The organic fluorine compound release agent can be used in combination with a conventional mold release agent.

Abstract: A thermosetting resin of a norbornene monomer is prepared by bulk-polymerizing a norbornene monomer in a mold in the presence of a metathesis catalyst system and further in the presence of a dicyclopentadiene heat-polymerized resin in an amount of 15 to 150 parts by weight per 100 parts by weight of the monomer.

Abstract: A process for producing butadiene which comprises (1) a reaction step of forming butadiene by gas-phase catalytic oxidative dehydrogenation of n-butene, (2) a cooling step of cooling the resulting gas discharged from the reaction step (1) to remove trace amounts of high boiling by-products contained in the resulting gas, (3) an aldehyde removal step of removing small amounts of aldehydes contained in the cooled gas discharged from the cooling step (2), (4) a compression step of compressing the gas discharged from the aldehyde removal step (3), and (5) a C.sub.4 component recovery step of recovering a C.sub.4 component containing butadiene and other C.sub.4 hydrocarbons from the compressed gas discharged from the compression step (4).