Abstract:
Provided is an olefin polymerization catalyst carrier with a general structure formula of Mg(ORI)n(ORII)2-n, wherein: 0≦n≦2, and RI and RII can be the same or different and are each independently selected from a C1-C20 hydrocarbon group. In the X-ray diffraction pattern of the catalyst carrier, there are a set of diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and the set of diffraction peaks contain 1-4 main diffraction peaks. Also disclosed is an olefin polymerization solid catalyst component which is prepared from the carrier Mg(ORI)n(ORII)2-n, a titanium compound, and at least one electron donor compound. In addition, also disclosed is an olefin polymerization catalyst containing the solid catalyst component, at least one organic aluminum compound, and optionally, an external electron donor compound.
Abstract:
A sealing gasket includes a liner and a polyurethane foam layer disposed on the liner. The polyurethane foam layer can have a density of 50 kg/m3 to 250 kg/m3, a force-to-compress at 25% compression of not greater than 5.0 psi, and an 50% springback parameter of not greater than 2.0 seconds. The polyurethane foam has a thickness in a range of 0.3 mm to 10.0 mm. A surface of the polyurethane foam layer has a skin.
Abstract translation:密封垫片包括衬垫和布置在衬套上的聚氨酯泡沫层。 聚氨酯泡沫层可以具有50kg / m 3至250kg / m 3的密度,25%压缩下的压力不大于5.0psi的压缩力,以及不大于2.0秒的50%回弹参数。 聚氨酯泡沫的厚度在0.3mm至10.0mm的范围内。 聚氨酯泡沫层的表面具有皮肤。
Abstract:
Disclosed are catalyst compositions having an internal electron donor which includes a 3,6-di-substituted-1,2-phenylene aromatic diester. Ziegler-Natta catalyst compositions containing the present catalyst compositions exhibit very high hydrogen response, high activity, high selectivity and produce propylene-based olefins with high melt flow rate.
Abstract:
AN ACTIVATOR FOR CATALYTIC SYSTEMS WHICH COMPRISE AN ORGANO-METALIC COMPOUND OF A METAL BELONGING TO ANY OF GROUPS I TO III OF THE PERIODIC SYSTEM AND A COMPOUND OF A TRANSITION METAL AND WHICH ARE USED FOR THE POLYMERISATION OF OLEFINS, CONSISTS OF A HALOGENATED DERIVATIVE OF 5,8-DIOXO-$ 1,4-METHYLENE-HEXAHYDRONAPHTALENE, CONTAINING AT LEAST 4 HALOGEN ATOMS IN THE MOLECULE.
Abstract:
A sealing gasket includes a liner and a polyurethane foam layer disposed on the liner. The polyurethane foam layer can have a density of 50 kg/m3 to 250 kg/m3, a force-to-compress at 25% compression of not greater than 5.0 psi, and an 50% springback parameter of not greater than 2.0 seconds. The polyurethane foam has a thickness in a range of 0.3 mm to 10.0 mm. A surface of the polyurethane foam layer has a skin.
Abstract translation:密封垫片包括衬垫和布置在衬套上的聚氨酯泡沫层。 聚氨酯泡沫层可以具有50kg / m 3至250kg / m 3的密度,25%压缩下的压力不大于5.0psi的压缩力,以及不大于2.0秒的50%回弹参数。 聚氨酯泡沫的厚度在0.3mm至10.0mm的范围内。 聚氨酯泡沫层的表面具有皮肤。
Abstract:
An olefin polymerization process comprises gas-phase polymerization of at least one olefin monomer in a reactor using a Ziegler-Natta or metallocene catalyst system in the presence of at least one suitable radical-generating compound in an amount sufficient for polymer modification and subsequent stabilization of such compound and generated radicals before post-reactor heat processing.
Abstract:
Polymerization of olefins and catalyst therefor, said catalyst comprising polymerizing at least one member selected from the group consisting of ethylene, propylene, butene-1 and styrene in the presence of a catalyst composition comprising (1) an organoaluminum compound having the formula, AIR2X wherein R represents a hydrocarbon residue selected from the group consisting of alkyl, aryl, aralkyl, alkaryl and cycloalkyl groups and X represents a halogen atoms selected from the group consisting of chlorine, bromine and iodine, (2) a halide of a transition metal of Groups IV, V and VI of the Periodic Table of the Elements, and (3) an aliphatic carboxylic ester having a side chain on a carbon atom in a Alpha -position to the ester carbon atom, the molar proportion of said organoaluminum compound, said halide of transition metal and said aliphatic carboxylic ester being 10-0.5 : 1 : 0.01-1.
Abstract:
Disclosed are catalyst compositions having an internal electron donor which includes a 3,6-di-substituted-1,2-phenylene aromatic diester. Ziegler-Natta catalyst compositions containing the present catalyst compositions exhibit very high hydrogen response, high activity, high selectivity and produce propylene-based olefins with high melt flow rate.