Abstract: Disclosed is a method of delaying the metathesis polymerization of strained ring cycloolefins by addition of certain phosphorus-containing compounds including various aryl phosphates, aliphatic phosphates, aliphatic phosphites, aryl phosphites, aryl phosphines and alkyl phosphines.

Abstract: It has been found that the properties of polycyclic cycloolefins, in particular poly(dicyclopentadiene), can be substantially improved by halogenation of the surface. Both aqueous and gaseous treatments of the polymer have been found to significantly improve the resistance to various acids and solvents. Chlorine, fluorine and bromine, in particular, when incorporated into the surface of the polymer increase chemical resistance, improve retention of properties upon aging, reduce emission of residual monomer, and encourage better adhesion of paint.Among the substances found to provide the desired chemical resistance on the polymer surface were dry chlorine gas, aqueous chlorine, immersion in liquid bromine, aqueous bromine, and fluorine gas. Similar improvement in chemical resistance can be obtained through treatment with pseudohalogen compounds or interhalogen compounds.

Abstract: Disclosed is a method of delaying the metathesis polymerization of strained ring cycloolefins by addition of certain nitrogen-containing compounds including various aromatic amines or mixtures thereof.

Abstract: A novel metathesis catalyst polymerizable composition is provided which comprises at least one ring-opening metathesis catalyst polymerizable norbornene-type monomer and at least one ring-opening metathesis catalyst polymerizable amine antioxidant comonomer.

Abstract: A method of preparing a mixture composed principally of dicyclopentadiene which is caused to remain liquid at low temperatures by the presence of other cyclopentadiene oligomers.

Abstract: This invention teaches the preparation of crosslinked copolymers of dicyclopentadiene and higher oligomers of cyclopentadiene. Such copolymers are characterized by having significantly higher heat distortion temperatures and glass transition temperatures than crosslinked dicyclopentadiene homopolymer.

Abstract: Disclosed is a transition metal component of a Ziegler-Natta catalyst which is composed of a titanium halide deposited on an essentially anhydrous magnesium chloride support. An improved support is prepared by contacting a hydrocarbon solution of magnesium alkanoate and a hydrocarbon solution of alkylaluminum dichloride in a liquid hydrocarbon reaction medium containing alkylaluminum dichloride and alkylaluminum alkanoate chloride. After workup and treatment with the titanium halide, the transition metal component is used in the Ziegler-Natta catalysis polymerization of 1-olefins. The resulting polyolefins have a narrow particle size distribution and a high bulk density.

Abstract: The transition metal component of a Ziegler-Natta catalyst is composed of a titanium halide deposited on a magnesium chloride support. The support is prepared by a process involving reaction of a magnesium alkanoate with an alkylaluminum dichloride in a hydrocarbon solvent and treatment of the magnesium chloride particles formed in the reaction with a hydrocarbon solvent and with an electron donor, preferably an aliphatic ether.

Abstract: In the polymerization of 1-olefins using a solid catalyst component composed of a titanium halide deposited on an anhydrous, essentially magnesium halide support and an activator component composed of a trialkylaluminum and an alkyl ester of an aromatic carboxylic acid, the productivity of the catalyst is increased by including a halosilane in the activator component.

Abstract: A polyolefin composition comprises repeating units of a metathesis polymerizable olefin monomer, a metathesis polymerization procatalyst, a metathesis polymerization procatalyst activator, and at least one member selected from the group consisting of: (i) a Lewis acid catalyst and a Lewis acid cocatalyst, effective to obtain a residual metathesis polymerizable olefin monomer level of from 0 to 0.25 weight percent, based on the weight of the polyolefin; (ii) an anionic polymerization catalyst; (iii) a free radical polymerization initiator; and (iv) a hydrosilation polymerization catalyst. The method for making the composition is also disclosed. The use of metathesis polymerization in conjunction with another type of polymerization can achieve a variety of beneficial effects, including a very low level of residual metathesis polymerizable monomer.