Abstract: Disclosed are support-activators and catalyst compositions comprising the support-activators for polymerizing olefins in which the support-activator includes a clay heteroadduct, also termed a composite, prepared from a colloidal phyllosilicate such as a colloidal smectite clay, which is chemically-modified with a surfactant. In an aspect, the clay composite can comprise the contact product of a colloidal smectite clay and a surfactant in a liquid carrier, but in the absence of any other reactant such as a cationic polymetallate, and their use as support-activators for metallocene precatalysts is also described. The use of surfactants with cationic polymetallates in forming clay-composites is also described.

Abstract: A method for manufacturing a biomass molded floor includes steps of: (1) preparing a PVC (polyvinyl chloride) board and a wood-plastic board, wherein a density of the wood-plastic board is in a range of 0.87-0.90 g/cm3; (2) coating an upper surface of the wood-plastic board with an adhesive, bonding the wood-plastic board with the PVC board, wherein an area of the wood-plastic board is in a range of 1000 mm×1200 mm-1000 mm×1800 mm; and (3) performing molding after bonding, wherein parameters of the molding are: temperature in a range of 35-40° C., pressure in a range of 10-12 MPa, time in a range of 50-60 s.

Abstract: Cyclic organosilicon compounds having a structure represented by the general formula and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.

Abstract: Cyclic organosilicon compounds having a structure represented by the general formula and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.

Abstract: A fireproof and waterproof biomass floor and a manufacturing method therefor. The floor comprises, in parts by weight, 80-95 parts of a wood fiber, 5-20 parts of an additive, and 0-1 part of a pigment. The additive comprises the following raw material components in percentage by weight: a metal oxide: 10-20 wt %; a hydrochloride: 10-20 wt %; a non-metal oxide: 5-10 wt %; a weak acid: 5-10 wt %; a sulfate: 1-2 wt %; a phosphate: 1-2 wt %; and water: 36-68 wt %. The manufacturing method comprises: mixing the wood fiber, the additive, and the pigment; flatly laying the obtained mixture on a base plate; performing die pressing, and standing for 3-10 days; performing demolding; subjecting the obtained demolded plate to edge cutting, drying, sanding, assembling, hot pressing, cutting, curing, slotting, and silent pad pasting on the back face. The floor has the advantages of being fireproof, ultralow in water absorption thickness expansion rate, and ultralow in formaldehyde release amount.

Abstract: A method for manufacturing a biomass molded floor includes steps of: (1) preparing a PVC (polyvinyl chloride) board and a wood-plastic board, wherein a density of the wood-plastic board is in a range of 0.87-0.90 g/cm3; (2) coating an upper surface of the wood-plastic board with an adhesive, bonding the wood-plastic board with the PVC board, wherein an area of the wood-plastic board is in a range of 1000 mm×1200 mm-1000 mm×1800 mm; and (3) performing molding after bonding, wherein parameters of the molding are: temperature in a range of 35-40° C., pressure in a range of 10-12 MPa, time in a range of 50-60 s.

Abstract: Disclosed are a catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, internal donors, in combination with a silane and oxalic acid diamides of the following formula: An olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound is also disclosed. Employment of both oxalic acid diamides and silane component in the presence of internal electron donors as an elements of solid Ziegler-Natta type catalyst composition enhances stereo-specificity while maintaining excellent catalyst activity and hydrogen response, in which the modified catalyst composition produces polypropylene with good productivity and higher stereo-specificity than catalyst composition without such modification.

Abstract: Cyclic organosilicon compounds having a structure represented by the general formula and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.

Abstract: Cyclic organosilicon compounds having a structure represented by the general formula and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.

Abstract: Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors,” or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors.

Abstract: Disclosed are a catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, internal donors, in combination with a silane and oxalic acid diamides of the following formula: An olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound is also disclosed. Employment of both oxalic acid diamides and silane component in the presence of internal electron donors as an elements of solid Ziegler-Natta type catalyst composition enhances stereo-specificity while maintaining excellent catalyst activity and hydrogen response, in which the modified catalyst composition produces polypropylene with good productivity and higher stereo-specificity than catalyst composition without such modification.

Abstract: The present invention relates to a Ziegler-Natta catalyst component for olefin polymerization containing an amide element in combination with one or more internal electron donors. The catalyst components, according to the present invention, are able to produce polypropylene polymers with higher stereo-regularity. The present invention also provides a phthalate-free catalyst system capable of producing polypropylene with an isotacticity that is equal to or higher than catalyst systems containing phthalate derivatives.

Abstract: The present invention relates to a Ziegler-Natta catalyst component for olefin polymerization containing an amide element in combination with one or more internal electron donors. The catalyst components, according to the present invention, are able to produce polypropylene polymers with higher stereo-regularity. The present invention also provides a phthalate-free catalyst system capable of producing polypropylene with an isotacticity that is equal to or higher than catalyst systems containing phthalate derivatives.

Abstract: Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors,” or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors.

Abstract: Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors”, or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors”.

Abstract: The present invention relates to a Ziegler-Natta catalyst component for olefin polymerization containing a urea element in combination with one or more internal electron donors. The catalyst components are able to produce polypropylene polymers with higher stereo-regularity. The present invention also provides phthalate-free catalyst system capable of producing polypropylene with an isotacticity that is equal to or higher than catalyst systems containing phthalate derivatives.

Abstract: A phthalate-free catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, diether, and oxalic acid diamides represented by the following formula (I): and an olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound. The present catalyst compositions improve diether-based catalyst selectivity while maintaining excellent catalyst activity and hydrogen response. An olefin polymer that has a moderate molecular weight distribution while maintaining higher stereoregularity (isotacticity) over diether-based catalyst, and better than or equal to phthalate-based catalyst can be produced by utilizing the inventive catalyst component.

Abstract: A phthalate-free catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, diether, and oxalic acid diamides represented by the following formula (I): and an olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound. The present catalyst compositions improve diether-based catalyst selectivity while maintaining excellent catalyst activity and hydrogen response. An olefin polymer that has a moderate molecular weight distribution while maintaining higher stereoregularity (isotacticity) over diether-based catalyst, and better than or equal to phthalate-based catalyst can be produced by utilizing the inventive catalyst component.

Abstract: Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors”, or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors”.

Abstract: Heterocyclic organic compounds are used as electron donors in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The electron donors may be used in the preparation of solid catalyst system, thus serving as “internal electron donors”, or they may be employed during or prior to polymerization with the co-catalyst as “external electron donors”.