Abstract:
A porous solidcatalyst component comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being selected from 1,3-diethers and the other being selected from succinates, characterized by the fact that the molar ratio ID/Ti is from 0.30 to 0.90, where ID is the total molar amount of succinate and 1,3-diether, the molar ratio of the 1,3-diether donor tothe succinate donor is higher than, or equal to, 0.60.
Abstract translation:一种多孔固体催化剂组分,其包含卤化镁,具有至少一个Ti-卤素键的钛化合物和至少两种电子给体化合物,其中一种电子给体化合物选自1,3-二醚,另一种选自琥珀酸酯,其特征在于, ID / Ti的摩尔比为0.30至0.90,其中ID是琥珀酸酯和1,3-二醚的总摩尔量,1,3-二醚供体与琥珀酸供体的摩尔比高于或等于 ,0.60。
Abstract:
A process for the preparation of high purity propylene polymers carried out in the presence of a catalyst comprising the product obtained by reacting:- an organo-aluminium compound, with - a solid catalyst component comprising Mg, Ti and electron donor compound selected from specific diolesters, said process being carried out employing an organo-aluminum/propylene ratio equal to or lower than 1.75 mmole/kg.
Abstract:
A catalyst system comprising the product obtained by contacting (a) a solid catalyst component containing Mg, Ti, halogen and at least an electron donor compound selected from diolesters of a specific formula (b) an alkylaluminum cocatalyst and (c) an ester of formula R'OOC-(CR" 2 ) m -COOR' in which m is an integer from 2 to 8, the R' groups, equal to or different from each other, are C1-C10 alkyl groups and the R" groups, independently, are hydrogen or C1 -C15 hydrocarbon groups.
Abstract:
Catalyst component for the polymerization of olefins comprising Mg, Ti and an electron donor of Formula (I) in which R, R1 and R4 groups, equal to or different from each other, are C1-C15 hydrocarbon groups and the R groups can be linked to form a cycle, R2-R3 groups, equal to or different from each other, are selected from hydrogen and C1-C15 hydrocarbon groups, the R1-R4 groups can optionally contain an heteroatom selected from halogen, P, S, N, O and Si, n is an integer from 0 to 5 and said electron donor and Ti atoms being present in an amount such that their molar ratio is equal to, or lower than, 0.65.
Abstract:
Catalyst component for the polymerization of olefins CH 2 =CHR in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and two electron donor compounds one of which selected from alkoxybenzenes and the other being selected from those of formula (II) where R 1 and R II are the same or different and are hydrogen or linear or branched C 1 -C 18 hydrocarbon groups which can also form one or more cyclic structures; R III groups, equal or different from each other, are hydrogen or C 1 -C 18 hydrocarbon groups; R IV groups equal or different from each other, have the same meaning of R III except that they cannot be hydrogen; each of R I to R IV groups can contain heteroatoms selected from halogens, N, O, S and Si.
Abstract translation:用于烯烃CH 2 = CHR聚合的催化剂组分,其中R为氢或具有1-12个碳原子的烃基,其包含Mg,Ti,卤素和两种电子给体化合物,其中一种选自烷氧基苯,另一种选自 式(II)的那些:其中R 1和R 2相同或不同并且是氢或者也可以形成一个或多个环状结构的直链或支链C 1 -C 18烃基; R III基团彼此相同或不同,为氢或C 1 -C 18烃基; R IV基团彼此相同或不同,具有与R III相同的含义,除了它们不能是氢; R 1至R IV基团中的每一个可以含有选自卤素,N,O,S和Si的杂原子。
Abstract:
A catalyst component for the polymerization of olefins comprising Mg, Ti and at least two electron donor compounds, one of which (A) belonging to specific diolesters and the other electron donor compound (B) being selected from aromatic monoesters of the following formula (B) in which R groups equal to or different from each other, are selected from C1-C15 hydrocarbon groups which can be also linked to form one or more cycles, m is an integer from 1 to 5 and R5 is a C1-C15 alkyl group, said electron donors A and B being in amounts such that the A/B molar ratio is lower than 20.
Abstract:
Process for the preparation of a porous propylene carried out in the presence of a catalyst system comprising (a) a Ziegler-Natta catalyst containing at least two electron donor compounds one of which being present in an amount from 50 to 90% by mol with respect to the total amount of donors and selected from succinates and the other being selected from 1,3 diethers, (b) an aluminum alkyl and comprising the following steps: i) contacting the catalyst components (a) and (b) for a period of time ranging from 1 to 60 minutes, at a temperature ranging from 35 to 55°C; optionally, ii) pre-polymerizing with one or more olefins of formula CH2=CHR, where R is H or a C1-C10 hydrocarbon group, up to forming amounts of polymer from about 0.1 up to about 1000 g per gram of solid catalyst component (a); and iii) polymerizing propylene in the optional presence of minor amounts of ethylene and/or C4-C10 alpha olefins producing said porous propylene (co)polymer.