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 produce a block copolymer catalytically, namely by a method for producing two or more polymer molecules per molecule of a concomitantly used catalyst or initiator.SOLUTION: The provided method is a method for forming a copolymer including multiple regions or segments having differentiated polymer compositions or characteristics by polymerizing at least one type of addition-polymerizable monomer and comprises a step of contacting the addition-polymerizable monomer or a mixture of the corresponding monomers with a composition including at least one type of olefin polymerization catalyst, a cocatalyst, and a reversible chain shuttling agent under addition polymerization conditions so as to form at least several growable polymer chains in a state where two or more blocks or segments formed within at least several of the produced polymers can be chemically or physically discriminated under differentiated process conditions.
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:
Un procedimiento continuo para la polimerización de uno o más monómeros polimerizables por adición paraformar un copolímero que comprende múltiples regiones o segmentos que tienen composiciones o propiedades depolímero distinguibles, comprendiendo dicho procedimiento poner en contacto un monómero polimerizable poradición o una mezcla de monómeros bajo condiciones de polimerización por adición con una composición quecomprende un catalizador de polimerización de olefinas sencillo, un cocatalizador y un agente de desplazamiento decadenas, estando dicho procedimiento caracterizado por la formación de al menos algunas de las cadenas depolímero en crecimiento bajo condiciones de procedimiento diferenciadas de manera que dos o más bloques osegmentos formados dentro de al menos algo del polímero resultante, son química o físicamente distinguibles.
Abstract:
A process for the polymerization of one or more addition polymerizable monomers to form a copolymer comprising multiple regions or segments of differentiated polymer composition or properties comprising contacting an addition polymerizable monomer or mixture of monomers under addition polymerization conditions with a composition comprising at least one olefin polymerization catalyst, a cocatalyst and a chain shuttling agent, said process being characterized by formation of at least some of the growing polymer chains under differentiated process conditions such that two or more blocks or segments formed within at least some of the resulting polymer are chemically or physically distinguishable.