58results about How to "High isotactic index" patented technology

The invention relates to a catalyst component for olefin polymerization, a catalyst and application of the catalyst in olefin homopolymerization and polymerization. By using a composite internal electronic donor compound which contains an alpha-cyanosuccinate compound A and a single-functional group or double-functional group compound B which is selected from ester, ether, ketone and ketal exceptfor the compound A as the catalyst of internal electronic donor synthesis, the catalyst has the characteristics of high catalytic activity, high hydrogen adjusting sensitivity, high isotactic index of polymerized products, wide molecular weight distribution and high weight-average molecular weight when being used for propylene polymerization. The favorable performance of the catalyst is beneficial to the preparation of polypropylene and the brand development of products.

The invention provides a catalyst component for olefin polymerization. The catalyst component is prepared by: dispersing an alcohol adduct melt of magnesium halide in a dispersing agent system of white oil and silicone oil to form an emulsion, discharging the emulsion into a cooling liquid to perform cooling shaping, thus forming a magnesium halide alcohol adduct microsphere, washing and drying the magnesium halide alcohol adduct microsphere to form a spherical carrier; and then treating the spherical carrier through a titanium compound, raising the temperature gradually, adding an internal electron donor during treatment, and after treatment, carrying out washing with an inert solvent, and performing drying, thus obtaining the spherical catalyst component. Specifically, a phosphorus-containing compound is added during the steps, and the phosphorus content in the catalyst component is 0.2-3.0wt%. The internal electron donor compound contains at least one diol ester compound selected from the following general formula (I). When the catalyst is used for olefin polymerization, especially propylene polymerization, a polymer with a high isotactic index and a high melt flow rate can be obtained. Particularly under a high hydrogen concentration, a polymer with a high melt flow rate and a high isotactic index can be obtained.

The invention provides a catalyst component, a catalyst and a method for olefin polymerization. The catalyst component comprises magnesium, titanium, halogen and an internal electron donor, the internal electron donor comprises an internal electron donor compound a and an internal electron donor compound b with the mole ratio of 0.007-2:1, the internal electron donor compound a is a malonate compound shown as the formula I/II, the internal donor compound b is a diol ester compound shown as the formula III, and the catalyst component uses the malonate compound and the diol ester compound as internal electron donor compounds, so that when the catalyst component is used for olefin polymerization, the catalyst component has higher vertical structural capacity, a polymer with high isotactic index can be obtained, and the catalyst component has high activity.

The invention provides a catalyst component for olefin polymerization. The catalyst component is prepared by: mixing a magnesium compound, an organic alcohol compound and an inert solvent, and adding an assistant precipitation agent to obtain an alcohol adduct; contacting the alcohol adduct with a titanium compound solution, then adding an internal electron donor compound and leaving them to react, conducting filtration to separate solid particles; adding the solid particles into the titanium compound solution, carrying out stirring and leaving them to react, and conducting filtration to separate solid particles; washing the solid particles by the inert solvent, and performing drying. Specifically, a phosphorus-containing compound is added during the steps. And the phosphorus content of the catalyst component is 0.2-3.0wt%. The internal electron donor compound contains at least one diol ester compound selected from the following general formula (I). When the catalyst is used for olefin polymerization, especially propylene polymerization, a polymer with a high isotactic index and a high melt flow rate can be obtained. Particularly under a high hydrogen concentration, a polymer with a high melt flow rate and a high isotactic index can be obtained.

The invention discloses a spherical carrier, an olefin polymerization catalyst, preparation methods and application of the spherical carrier and the olefin polymerization catalyst, and an olefin polymerization method, belonging to the field of olefin polymerization. Specifically, the invention relates to the spherical carrier, the preparation method for the spherical carrier, the spherical carrier prepared by using the preparation method, the olefin polymerization catalyst, the preparation method for the olefin polymerization catalyst, the olefin polymerization catalyst prepared by using the preparation method and the application thereof, and the olefin polymerization method. The catalyst prepared from the spherical carrier provided by the invention is not prone to fragmentation, presents high activity and steric control capability in propylene polymerization, and has high polypropylene isotactic index and bulk density.

The invention provides a catalyst component for olefin polymerization. The catalyst component contains the reaction product of a magnesium compound, a titanium compound, a phosphorus-containing compound and a phosphorus-free internal electron donor compound. The phosphorus-containing compound is added in a step except the step of magnesium compound dissolution, and the catalyst component has a phosphorus content of 0.4-3.0wt%. The involved catalyst has strong stereospecificity and good hydrogen regulation sensitivity. When the catalyst is used for olefin polymerization, especially propylene polymerization, a product with a high isotactic index, a high melt flow rate and a low dimethylbenzene soluble substance content can be obtained simultaneously. Especially when the catalyst is used for propylene polymerization under a high hydrogen concentration condition, the obtained polymer can have a high melt flow rate, a high isotactic index and a low dimethylbenzene soluble substance content, and at the same time, the polymer has a relatively narrow molecular weight distribution.

The invention discloses a spherical carrier, an olefin polymerization catalyst, preparation methods and application of the spherical carrier and the olefin polymerization catalyst, and an olefin polymerization method, belonging to the field of olefin polymerization. Specifically, the invention relates to the spherical carrier, the preparation method for the spherical carrier, the spherical carrier prepared by using the preparation method, the olefin polymerization catalyst, the preparation method for the olefin polymerization catalyst, the olefin polymerization catalyst prepared by using the preparation method and the application thereof, and the olefin polymerization method. The catalyst prepared from the spherical carrier provided by the invention is not prone to fragmentation, presents high activity and steric control capability in propylene polymerization, and has high polypropylene isotactic index and bulk density.

The invention discloses a high-rigidity high-heat-resistance homo-polypropylene material which is prepared from the following raw materials: a homo-polypropylene resin, an antioxidant, a halogen absorbent and a nucleating agent. The homo-polypropylene resin is prepared by the following steps: adding the raw material propylene into a loop reactor, adding the catalyst, cocatalyst, electron donor and antistatic agent, and uniformly stirring, wherein the reaction temperature in the loop reactor is controlled at 70+/-1 DEG C, the reaction pressure is controlled at 3.4-3.8 MPa, and the hydrogen concentration is controlled at 3500-4500 ppm. The invention also discloses a preparation method of the high-rigidity high-heat-resistance homo-polypropylene material. The high-rigidity high-heat-resistance homo-polypropylene material has higher melt index, bending modulus and heat-deformation temperature, and can satisfy the raw material requirements of injection molding manufacturers of small home appliances, automobiles and the like.

The invention relates to 2-cycloalkyl-3-secondary alkyl-2-cyansuccinate compounds with a general formula represented by formula (II) and a preparation method thereof. A catalyst which is synthesized by treating the compounds as an internal electron donor of a titanium-contained solid catalyst component of an olefin polymerization catalyst has excellent performances and has a high activity on the propylene polymerization, the isotacticity degree of obtained polymers is good, and the molecular weight distribution of the obtained polymers is wide. Comprehensive performances of the catalyst in the invention are better than comprehensive performances of catalysts which treat 2,3-dialkylsuccinate compounds or omega-cyan C2-C5 monobasic ester compounds as the internal electron donor and have been reported by literatures.

The invention relates to a catalyst component and a catalyst for olefin polymerization and application of the catalyst to olefin homopolymerization and copolymerization. In the invention, an alpha-cyano ester succinate compound containing a specific structure is used as an internal electron donor, a magnesium chloride and silicon dioxide composite carrier is used, and the technical means are matched with each other for use, so that the polymerization activity of the catalyst is also kept while the grain form of the catalyst is improved. The catalyst is used for propylene polymerization; a polymerization product has a high isotactic index and high weight-average molecular weight; and polypropylene with wide molecular weight distribution is obtained. Compared with the conventional 2,3-dialkyl ester succinate compound, the alpha-cyano ester succinate compound has the advantages of high easiness in preparation and high contribution to industrial production.

The invention provides a catalyst component for olefin polymerization. The catalyst component comprises elemental magnesium, elemental titanium, halogen and internal electron donors, wherein the internal electron donors are composed of a ketoimine compound as shown in a formula I which is described in the specification and an alcoholic ester compound as shown in a formula II which is described inthe specification. The invention also provides a catalyst component for polymerization of propylene. The catalyst comprises A) the catalyst component; B) an organo-aluminum compound; and C) an optional organo-silicon compound. The invention further provides application of the catalyst component and catalyst to the field of polymerization of propylene. As applied to polymerization of propylene, such a catalyst system has high long-period activity and orientation capability and good hydrogen sensitivity; and a prepared polymer is wide in molecular weight distribution.

The invention relates to a catalytic system for preparation of wide-distribution polyolefin, and application of the catalytic system. The catalytic system comprises a solid catalyst component (A), a cocatalyst (B) and a first external electron donor (ED1), wherein the component (A) is a magnesium halide loaded Ti solid component and contains a composite internal electron donor (ID); the first external electron donor (ED1) is selected from one or more of compounds as shown in a general formula (1), (the formula is as shown in the description); and the R1 is selected from C1-C6 alkyl, C3-C8 naphthenic base, C6-C14 aryl or C6-C14 ceteroary, R2 is selected the formulas as shown in the description, and R3 is selected from OR1, R2, C1-C6 alkyl and C3-C8 naphthenic base. When being applied to olefin polymerization, the catalytic system has various advantages: catalytic activity and hydrogen sensitivity are high; and the polymerization product is high in isotactic index, wide in molecular weight distribution and high in weight-average molecular weight.

The invention provides a catalyst component for olefin polymerization. The catalyst component comprises elemental magnesium, elemental titanium, halogen and internal electron donors, wherein the internal electron donors are composed of a ketoimine compound as shown in a formula I which is described in the specification and an aromatic ester compound as shown in a formula II which is described in the specification. The invention also provides a catalyst component for olefin polymerization. The catalyst comprises A) the catalyst component; B) an organo-aluminum compound; and C) an optional organo-silicon compound. The invention further provides application of the catalyst component and catalyst to the field of polymerization of olefins, especially propylene. As applied to polymerization of propylene, such a catalyst system has high long-period activity and orientation capability and good hydrogen sensitivity; and a prepared polymer is wide in molecular weight distribution.

The invention discloses a spherical carrier, an olefin polymerization catalyst, preparation methods and application of the spherical carrier and the olefin polymerization catalyst, and an olefin polymerization method, belonging to the field of olefin polymerization. Specifically, the invention relates to the spherical carrier, the preparation method for the spherical carrier, the spherical carrier prepared by using the preparation method, the olefin polymerization catalyst, the preparation method for the olefin polymerization catalyst, the olefin polymerization catalyst prepared by using the preparation method and the application thereof, and the olefin polymerization method. The catalyst prepared from the spherical carrier provided by the invention is not prone to fragmentation, presents high activity and steric control capability in propylene polymerization, and has high polypropylene isotactic index and bulk density.

The invention discloses a method for preparing a solid catalyst component for an olefin polymerization reaction. The method comprises the following steps of dissolving a magnesium compound in a solvent system containing a hydrocarbon compound and an alcohol compound, mixing a titanium compound and the above solution at a temperature of -40 to 0 DEG C, adding an electron donor compound into the mixture at a temperature of 50-150 DEG C, and carrying out washing by an inert diluent to obtain the solid catalyst component. The used electron donor is at least one of diol ester compounds shown in the general formula (I). The catalyst system provided by the invention has greatly improved polymerization activity, hydrogen response and stereospecificity. Through the solid catalyst component and the catalyst, a polymer having a high fusion index and high isotacticity is obtained. Compared with the prior art, the solid catalyst component has the advantages that if polymer melt indexes are the same, in other words, hydrogen response is the same, isotactic indexes are improved, and if polymer isotactic indexes are the same, the polymer melt indexes are improved, in other words, the hydrogen response is improved.

The invention discloses a polypropylene non-woven fabric material with ultrahigh flowability and the ultralow gel content. The polypropylene non-woven fabric material is composed of polypropylene, a phenolic antioxidant, a phosphite antioxidant, a hindered amine light stabilizer, an acid acceptor and a slipping agent. The components comprise, by weight, 100 parts of the polypropylene, 0.05-0.08 part of the phenolic antioxidant, 0.1-0.2 part of the phosphite antioxidant, 0.06-0.08 part of the hindered amine light stabilizer, 0.05-0.8 part of the acid acceptor and 0.02-0.04 part of the slippingagent. The polypropylene non-woven fabric material has the beneficial effects that due to advancement of the formula and advancement of a screw combination, productivity is improved, and the unit processing cost, power consumption, water consumption and initiator consumption are all reduced to a certain degree; the macromolecule (gel) quantity in the product is reduced, and the isotactic index isimproved; the quantity of gel generated in the subsequent procedure processing process of the product is greatly reduced, and the service cycle of a spinneret plate in the subsequent procedure can begreatly prolonged; and production of whole series of products with melt indexes ranging from 300 g/10 min to 6,000 g/10 min is achieved.

The invention belongs to the field of olefin polymerization, and particularly provides an olefin batch polymerization technology. The olefin batch polymerization technology comprises the steps that (1) a main catalyst, an activator and an optional external electron donor are added into a pre-compounding reaction kettle for a pre-compounding reaction, thus a pre-compounding catalyst is obtained, then prepolymerization olefin is introduced into the pre-compounding reaction kettle for a prepolymerization reaction, and thus a prepolymerization catalyst is obtained; and (2) the prepolymerization catalyst and polymerization olefin are added into a polymerization kettle for a polymerization reaction, and thus polyolefin is obtained. According to the olefin batch polymerization technology, the pre-compounding reaction kettle is introduced to conduct the pre-compounding reaction and the prepolymerization reaction of the catalyst, thus the isotactic index of the obtained polyolefin is increased,and the melt index is maintained at a high level.

The invention provides a catalyst component for olefin polymerization. The catalyst component comprises elemental magnesium, elemental titanium, halogen and internal electron donors, wherein the internal electron donors are composed of an imine compound as shown in a formula I which is described in the specification and a diether compound as shown in a formula II which is described in the specification. The invention also provides a catalyst component for olefin polymerization. The catalyst comprises A) the catalyst component; B) an organo-aluminum compound; and C) an optional organo-silicon compound. The invention further provides application of the catalyst component and catalyst to the field of polymerization of olefins, especially propylene. As applied to polymerization of propylene, such a catalyst system has high long-period activity and adjustable orientation capability; and a prepared polymer is wide in molecular weight distribution.

The present invention discloses an olefin polymerization catalyst component and a preparation method thereof and an olefin polymerization catalyst and application thereof. The catalyst component comprises the following the reaction product components: (i) a magnesium-containing compound; (ii) a titanium-containing compound; and (iii) an internal electron donor; wherein the internal electron donor is a combination of an internal electron donor compound a, an internal electron donor compound b and an internal electron donor compound c, the internal electron donor compound a is a diol ester compound shown as a formula I, the internal electron donor compound b is a diether compound shown as a formula II, and the internal electron donor compound c is an alkylene oxide compound shown as a formula III. The olefin polymerization catalyst component during being used in olefin polymerization has high stereoregularity orientation property, meanwhile polymerization activity is high, and a high isotactic index and low ash content olefin polymer can be obtained in the condition of no use or a very small amount of use of an external electron donor.