Abstract:
PROBLEM TO BE SOLVED: To provide a method for identifying a catalyst composition for use in the heterogeneous Ziegler-Natta addition polymerization of an olefin monomer.SOLUTION: The catalyst composition comprises a procatalyst comprising a magnesium and titanium-containing procatalyst and a cocatalyst. The method comprises: (a) providing a library comprising at least one procatalyst compound; (b) forming a catalyst composition library by contacting the member of the procatalyst library with one or more cocatalysts and contacting the resulting mixture with an olefin monomer under olefin polymerization conditions, thereby causing the polymerization reaction to take place; (c) measuring at least one variable of interest during the polymerization; and (d) selecting the catalyst composition of interest by reference to the measured variable.
Abstract:
PROBLEM TO BE SOLVED: To provide a catalyst composition for use in forming a multi-block copolymer, the copolymer containing therein two or more segments or blocks differing in chemical or physical properties, and to provide a polymerization process using the same.SOLUTION: The composition comprises the admixture or reaction product resulting from combining: (A) a first olefin polymerization catalyst; (B) a second olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions; and (C) a chain shuttling agent.
Abstract:
PROBLEM TO BE SOLVED: To provide: a composition for use in forming a multi-block copolymer produced in a continuous process without the need for sequential monomer addition, the copolymer containing two or more segments or blocks differing in chemical or physical properties; and a polymerization process using the same.SOLUTION: Provided are: an admixture or reaction product resulting from combining (A) a first olefin polymerization catalyst, (B) a second olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by the catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent; and a polymerization process using the same.
Abstract:
PROBLEM TO BE SOLVED: To provide a polymerization process and the like that is capable of preparing copolymers having unique properties in a high-yield process adapted for commercial utilization.SOLUTION: This invention relates to a polymerization process and the resulting polymer composition, the process comprising a step of 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.
Abstract:
The present disclosure is directed to a silicon-terminated telechelic polyolefin composition comprising a compound of formula (I). Embodiments related to a process for preparing the silicon-terminated telechelic polyolefin composition comprising a compound of formula (I), the process comprising combining starting materials comprising (A) a silicon-terminated organo-metal compound and (B) a silicon-based functionalization agent, thereby obtaining a product comprising the silicon-terminated telechelic polyolefin composition. In further embodiments, the starting materials of the process may further comprise (C) a nitrogen containing heterocycle. In further embodiments, the starting materials of the process may further comprise (D) a solvent.
Abstract:
The present disclosure is directed to a silicon-terminated organo-metal composition comprising a compound of formula (I). Embodiments relate to a process for preparing the silicon-terminated organo-metal composition comprising the compound of formula (I), the process comprising combining starting materials comprising (A) a vinyl-terminated silicon-based compound and (B) a chain shuttling agent, thereby obtaining a product comprising the silicon-terminated organo-metal composition. In further embodiments, the starting materials of the process may further comprise (C) a solvent.