摘要:
The present invention relates to a diimine metal complex represented by Formula I, a preparation method therefor, and application thereof. The complex is used as a main catalyst in catalysts for olefin polymerization, and can achieve catalytic ethylene polymerization at a high temperature to prepare high molecular weight branched polyethylene.
摘要:
The present invention relates to an amino-imine metal complex represented by Formula I and a preparation method and an application thereof. The complex is used as a main catalyst in catalysts for olefin polymerization, and can catalyze the polymerization of ethylene at a relatively high temperature to prepare branched polyethylene having high molecular weight.
摘要:
The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M 1 , M 2 , M 3 , M 4 , M 5 , M 6 , M 1 ', M 2 ', M 3 ', M 4 ', M 5 ' and M 6 ' are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, -R 1 and -OR 2 , wherein R 1 and R 2 are each independently a C 1 -C 10 hydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C 1 -C 10 alkoxy and heteroatoms; and wherein, when among M 1 -M 6 and M 1 '-M 6 ', any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of R 1 and -OR 2 , the two adjacent groups may optionally be linked to form a ring, with a proviso that M 1 , M 2 , M 3 , M 4 , M 5 , M 6 , M 1 ', M 2 ', M 3 ', M 4 ', M 5 ' and M 6 ' are not simultaneously hydrogen.
摘要:
Disclosed are a method for preparing an olefin-olefinic alcohol copolymer and an olefin-olefinic alcohol copolymer prepared by the method. The catalyst used in the method for preparing the olefin-olefinic alcohol copolymer comprises a diimine metal complex as shown in Formula I. The spherical and/or spherical-like polymer prepared according to a preferred embodiment of the preparation method has good prospects in industrial applications.
摘要:
Spherical carriers for an olefin polymerization catalyst, catalyst components, catalysts, and preparation methods therefor are disclosed. The method for preparing the spherical carriers comprises the following steps: (1) reacting, in the presence of at least one polymeric dispersion stabilizer, a magnesium halide with an organic compound containing active hydrogen to form a complex solution; (2) reacting said complex solution with an alkylene oxide-type compound to directly precipitate solid particles; and (3) recovering the solid particles to obtain spherical carriers. When a catalyst prepared by using the present spherical carrier is used in propylene polymerization, said catalyst exhibits high polymerization activity and high stereo-directing ability.
摘要:
The present invention belongs to the technical field of branched polyolefin materials, and discloses a branched olefin polymer, a preparation method therefor and the use thereof. The branched olefin polymer is obtained by polymerizing at least one C4-C20 nonterminal olefin monomer with optional ethylene, propylene, and C4-C20 terminal olefin monomers; and the branched olefin polymer has the following characteristics: (a) a molecular weight of 20000 to 500000 g/mol; (b) a molecular weight distribution of 3.5 to 6.0, and a bimodal structure characterized by GPC; (c) a melting point of 0°C to 110°C and a glass-transition temperature of -80°C to -50°C; and (d) having 20 to 200 methyl groups per 1000 methylene groups.
摘要:
The present invention provides a magnesium-based solid and a solid catalyst component for olefin polymerization. By means of determination based on a nitrogen adsorption method, the solid has a multimodal pore distribution and a specific surface area of not less than 50 m 2 /g, and the pore size distribution of the solid is in a range of 1 nm to 300 nm. There is at least one peak within a pore size range of less than 10 nm, and there is at least another peak within a pore size range of not less than 10 nm. When the catalyst formed using the solid catalyst component is used for propylene polymerization, the catalyst has higher polymerization activity and higher stereotactic orientation capability, and the prepared polymer has a relatively wide molecular weight distribution.
摘要:
Disclosed in the present invention are a method for preparing polymer, and an obtained polymer. The method comprises: enabling olefin and unsaturated carboxylate be subjected to a polymerization reaction in the presence of a catalyst to generate an olefin-unsaturated carboxylate polymer, the catalyst comprising a primary catalyst and optionally a cocatalyst, and the primary catalyst comprising at least one complex represented by formula I, formula I', or formula I". By selecting a reacted unsaturated carboxylate monomer, catalysts, and a suitable polymerization process, a spherical and/or sphere-like polymer having good shape is directly prepared without subsequent processing steps such as granulation, and the obtained polymer product is not prone to fouling in a reactor and is convenient for transportation.
摘要:
Disclosed are a catalyst system for olefin polymerization and use thereof. The catalyst system comprises a main catalyst and a cocatalyst. The cocatalyst comprises a twelve-membered ring compound represented by formula (M). The catalyst system provided in the present invention is particularly suitable for preparing polypropylene products having high stereoregularity and low ash, and can regulate the melt index of the products within a wide range by adjusting the amount of hydrogenation. The catalyst system provided in the present invention is also suitable for copolymerization systems to improve the copolymerization yield.