摘要:
The present invention provides a catalyst component for olefin polymerization and a preparation method thereof, and a catalyst for olefin polymerization and an application thereof. The catalyst component for olefin polymerization comprises reaction products of the following components: (1) a solid component; (2) at least one titanium compound; and (3) at least two internal electron donors, wherein the solid component comprises a magnesium compound represented by formula (1) and an epoxide represented by formula (2), wherein R 1 is a C 1 -C 12 linear or branched alkyl; R 2 and R 3 are identical or different, and are independently hydrogen or unsubstituted or halogen-substituted C 1 -C 5 linear or branched alkyl; X is halogen; m is in a range of from 0.1 to 1.9, n is in a range of from 0.1 to 1.9, and m+n=2.
摘要翻译:本发明提供了一种用于烯烃聚合的催化剂组分及其制备方法,以及用于烯烃聚合的催化剂及其应用。 用于烯烃聚合的催化剂组分包括以下组分的反应产物:(1)固体组分; (2)至少一种钛化合物; 和(3)至少两个内部电子给体,其中固体组分包含由式(1)表示的镁化合物和由式(2)表示的环氧化物,其中R 1是C 1 -C 12直链或支链烷基; R 2和R 3相同或不同,独立地为氢或未取代的或卤素取代的C 1 -C 5直链或支链烷基; X是卤素; m为0.1〜1.9的范围,n为0.1〜1.9,m + n = 2。
摘要:
Disclosed is a propylene-butene copolymer. The copolymer contains, based on the total amount of structural units of the copolymer, 90-99 mol% of propylene structural units and 1-10 mol% of butene structural units. The xylene solubles content of the copolymer is less than or equal to 4 wt%, and preferably less than or equal to 3 wt%. The propylene-butene copolymer is substantially free of fraction having a molecular weight lower than 1000. The copolymer has a melt flow index of greater than or equal to 20 g/10 min as measured at 230 °C under a load of 2.16 kg. The propylene-butene copolymer of the present invention has the advantages of a high melt flow index and few xylene solubles, and does not contain a phthalate-type plasticizer, thereby being beneficial to the application thereof in fields such as food and medical and health services.
摘要:
Disclosed are a spherical carrier for olefin polymerization catalysts, a preparation method therefor and an application thereof, a catalyst and an application thereof, the carrier comprising at least one magnesium-containing compound having a structure represented by formula (1). The spherical carrier for olefin polymerization catalysts of the present invention has a relatively good particle morphology, and substantially no abnormally morphological particles will appear. The provided method may prepare a carrier having a small particle size and greatly expands the particle size range of the preparable carrier. When the catalyst prepared by using the obtained carrier is used for olefin polymerization, polymerization activity is good, substantially no abnormally morphological material is present, and hydrogen response is good.
摘要:
The present invention relates to the technical field of polypropylene materials, and provides a polypropylene microsphere and a preparation method therefor, a 3D printing raw material, and a use. The polypropylene microsphere comprises 0.2 wt%-10 wt% of a structural unit derived from ethylene and 90 wt%-99.8 wt% of a structural unit derived from propylene, wherein a melting heat absorption curve of the polypropylene microsphere is obtained by means of a differential scanning calorimeter (DSC), and a half-peak width (Wm) of the melting heat absorption curve of the polypropylene microsphere is 4-10 °C. According to the polypropylene microsphere of the present invention, the crystallization sequence distribution of the polypropylene microsphere is uniform, and when the polypropylene microsphere is used for 3D printing, 3D printing melting is uniform, a product is good in performance, and the polypropylene microsphere has an industrial application prospect.
摘要:
The present application relates to a carrier for an alkene polymerization catalyst, and a preparation method therefor and an application thereof. The carrier for an alkene polymerization catalyst comprises a magnesium-containing compound and sulfur. The sulfur is at least one of an elemental sulfur, a complex sulfur, and a compound sulfur. The carrier has good particle morphology and a smooth surface, hardly comprises special particles, and has narrow particle size distribution. The catalyst prepared from the carrier has high activity and good sensitivity to hydrogen regulation, and can improve the density of a polymer stack when being used for alkene polymerization.
摘要:
The present invention provides an olefin polymerization catalyst component, a catalyst system, a prepolymerization catalyst composition and an olefin polymerization method, which belong to the field of olefin polymerization catalysts. The catalyst component contains magnesium, titanium, halogen, and an internal electron donor, and the internal electron donor comprises a compound A, a compound B and a compound C, wherein the compound A is selected from a hydroxybenzoyl compound represented by formula (I), the compound B is selected from one or more of an ester compound other than the compound A and an ether compound, and the compound C is selected from an alkoxysilane represented by formula RnSi(OR6)4-n, and wherein, a content of the compound A may be zero. When the catalyst system comprising the catalyst component and a co-catalyst component or a reaction product of the two, or a prepolymerization catalyst composition prepared by further prepolymerization is used for olefin copolymerization, an excellent olefin copolymerization ability is exhibited, and a good polymerization activity, stereospecificity and hydrogen adjustment sensitivity are maintained; in addition, polymer particles that are obtained have a good morphology and a high sphericity, and contain less fine powder.
摘要:
Disclosed in the present invention is a solid component for preparing an olefin polymerization catalyst, and a preparation method therefor and an application thereof. The solid component comprises: (i) a magnesium compound as represented by the following formula (1), (ii) a Lewis base (LB), and (iii) optionally, metal components other than magnesium, wherein the LB is a compound as shown in general formula (II) or an amide compound as shown in general formula (II'). The solid component prepared in the present invention has a better particle morphology, and a catalyst prepared by using the solid component as a carrier is less likely to be crushed, and has better stereostructural orientation in olefin polymerization, particularly propylene polymerization or copolymerization.
摘要:
Disclosed are a catalyst component and a catalyst for olefin polymerization, and an olefin polymerization method. The catalyst component comprises magnesium, titanium, a halogen and an internal electron donor, wherein the internal electron donor comprises a monocarboxylic acid ester compound and a diether compound, and the molar ratio of the monocarboxylic acid ester compound to the diether compound is (0.0035-0.7): 1. By using the catalyst, a polymer having both a high isotactic index and a high melt flow index can be prepared.
摘要:
The present invention provides a catalyst component for olefin polymerization and a preparation method thereof, and a catalyst for olefin polymerization and an application thereof. The catalyst component for olefin polymerization comprises reaction products of the following components: (1) a solid component; (2) at least one titanium compound; and (3) at least two internal electron donors, wherein the solid component comprises a magnesium compound represented by formula (1) and an epoxide represented by formula (2), wherein R 1 is a C 1 -C 12 linear or branched alkyl; R 2 and R 3 are identical or different, and are independently hydrogen or unsubstituted or halogen-substituted C 1 -C 5 linear or branched alkyl; X is halogen; m is in a range of from 0.1 to 1.9, n is in a range of from 0.1 to 1.9, and m+n=2.
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.