摘要:
An olefin metathesis process for converting a reactant olefin or a mixture of reactant olefins into one or more product olefins that are different from the reactant olefin(s). The process employs a catalyst system containing a carbene-generating agent and a bimetallic ruthenium complex comprising one or more μ-hydrido bridging ligands, and optionally containing di(t-butyl)phosphine. The catalyst system is advantageously active at process temperatures greater than 90° C. Cyclization metathesis and ring-opening polymerization metathesis are preferred olefin metathesis processes.
摘要:
A composition comprising a polymerization modifier for the copolymerization of at least one olefin monomer and 1-octene and a polymerization process using the polymerization modifier.
摘要:
A composition comprising a polymerization modifier for the copolymerization of at least one olefin monomer and propylene and a polymerization process using the polymerization modifier.
摘要:
A polymerization process and the resulting polymer composition, said process comprising polymerizing one or more addition polymerizable monomers and a polymerizable shuttling agent in the presence of at least one addition polymerization catalyst comprising a metal compound or complex and a cocatalyst under conditions characterized by the formation of a branched polymer, preferably comprising pseudo-block molecular architecture.
摘要:
An olefin metathesis process for converting a reactant olefin or a mixture of reactant olefins into one or more product olefins that are different from the reactant olefin(s). The process employs a catalyst system containing a carbene-generating agent and a bimetallic ruthenium complex comprising one or more μ-hydrido bridging ligands, and optionally containing di(t-butyl)phosphine. The catalyst system is advantageously active at process temperatures greater than 90° C. Cyclization metathesis and ring-opening polymerization metathesis are preferred olefin metathesis processes.
摘要:
Two or more chemically distinguishable ethylenically unsaturated polymers, at least one having from 0.001 to 50 mole percent unsaturation and at least one other having an expected Tg or measured Tm value greater than 100° C. are cross-metathesized to form thermoplastic elastomers having improved performance properties.
摘要:
A combinatorial method for identifying a catalyst composition for use in the homogeneous addition polymerization of an olefin monomers, said catalyst composition comprising a transition metal compound, a cocatalyst and a polymerization modifier, as well as catalyst compositions and improved olefin polymerization processes resulting therefrom.
摘要:
A combinatorial method for identifying a catalyst composition for use in the homogeneous addition polymerization of an olefin monomers, said catalyst composition comprising a transition metal compound, a cocatalyst and a polymerization modifier, as well as catalyst compositions and improved olefin polymerization processes resulting therefrom.
摘要:
A polymerization process and the resulting polymer composition, said process comprising polymerizing one or more addition polymerizable monomers and a polymerizable shuttling agent in the presence of at least one addition polymerization catalyst comprising a metal compound or complex and a cocatalyst under conditions characterized by the formation of a branched polymer, preferably comprising pseudo-block molecular architecture.
摘要:
Catalyst compositions that are highly tolerant of catalyst poisons for use in addition polymerizations comprising a catalytic derivative of a Group 4 metal complex, a cocatalyst, and a Group 13 metal amide compound.