摘要:
A multilayer film comprising at least two layers, a layer (B) and an outer layer (A), wherein outer layer (A) comprises a multimodal polymer of ethylene with at least two different comonomers selected from alpha-olefins having from 4 to 10 carbon atoms, which multimodal polymer of ethylene has a density of 910 to 935 kg/m 3 , and a Mw/Mn of 2 to 8; and said layer (B) comprising a multimodal ethylene copolymer of ethylene and one C4-10 comonomer or a multimodal ethylene terpolymer of ethylene and at least two C4-10 comonomers, or a mixture thereof, wherein said multimodal ethylene copolymer or terpolymer has a density of 910 to 940 kg/m 3 and an Mw/Mn of 9 or more.
摘要:
A film formed from a polyethylene copolymer using a reduced chromium oxide catalyst, ethylene monomers and a co-monomer selected from butene monomers or 1-hexene, where the polyethylene copolymer has a density in the range of from about 0.935 to about 0.950 g/cm 3 and an I 21 /I 5 in a range of about 18.0 to about 30.0. The film formed from the polyethylene copolymer has a dart drop impact (g/μm) that significantly greater as compared to a film of the polyethylene copolymer formed using a silyl chromate catalyst in place of the reduced chromium oxide catalyst. A method of making such films is also provided.
摘要翻译:使用还原的氧化铬催化剂,乙烯单体和选自丁烯单体或1-己烯的共聚单体由聚乙烯共聚物形成的膜,其中聚乙烯共聚物的密度范围为 约0.935至约0.950g / cm 3和约21.0至约30.0的I 21 / I 5。 与使用甲硅烷基铬酸盐催化剂代替还原的氧化铬催化剂形成的聚乙烯共聚物膜相比,由聚乙烯共聚物形成的膜具有明显更大的落镖冲击(g /μm)。 还提供了制作这种胶片的方法。 p>
摘要:
The invention relates to power cable polymer composition which comprises a single site polyethylene (SSPE), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.
摘要:
The invention relates to power cable polymer composition which comprises a chromium catalyst polyethylene (CrPE), a power cable, for example, a high voltage direct current (HVDC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.
摘要:
The invention relates to a pipe comprising polyethylene or a polyethylene composition comprising polyethylene and carbon black, wherein the polyethylene is produced in the presence of a solid catalyst component and a co-catalyst, wherein the solid catalyst component is prepared by a process comprising the steps of: (a) contacting a dehydrated support having hydroxyl groups with a magnesium compound having the general formula MgR 1 R 2 , wherein R 1 and R 2 are the same or different and are independently selected from the group comprising an alkyl group, alkenyl group, alkadienyl group, aryl group, alkaryl group, alkenylaryl group and alkadienylaryl group; (b) contacting the product obtained in step (a) with modifying compounds (A), (B) and (C), wherein: (A) is at least one compound selected from the group consisting of carboxylic acid, carboxylic acid ester, ketone, acyl halide, aldehyde and alcohol; (B) is a compound having the general formula R 11 f(R 12 O) g SiX h , wherein f, g and h are each integers from 0 to 4 and the sum of f, g and h is equal to 4 with a proviso that when h is equal to 4 then modifying compound (A) is not an alcohol, Si is a silicon atom, O is an oxygen atom, X is a halide atom and R 11 and R 12 are the same or different and are independently selected from the group comprising an alkyl group, alkenyl group, alkadienyl group, aryl group, alkaryl group, alkenylaryl group and alkadienylaryl group; (C) is a compound having the general formula (R 13 O) 4 M, wherein M is a titanium atom, a zirconium atom or a vanadium atom, O is an oxygen atom and R 13 is selected from the group comprising an alkyl group, alkenyl group, alkadienyl group, aryl group, alkaryl group, alkenylaryl group and alkadienylaryl group; and (c) contacting the product obtained in step (b) with a titanium halide compound having the general formula TiX 4 , wherein Ti is a titanium atom and X is a halide atom, whereby the polyethylene has a molecular weight Mz+1 of at least 720,000 g/mol and less than 2,500,000 g/mol.
摘要:
A container comprising a propylene, ethylene, 1-butene terpolymer wherein in the terpolymer: i) the content of ethylene derived units ranges from 0.5 wt. % to 1.8 wt. %; ii) the content of 1-butene derived units ranges from 1.5 wt. % to 2.5; iii) the ratio C2wt%/C4wt% ranges from 0.40 to 0.80; wherein C2wt% is the weight per cent of ethylene derived units and C4wt% is the weight per cent of 1-butene derived units; iv) the melt flow rate, MFR measured according to ISO 1133, 230° C, 2.16 kg ranges from 30 to 80 g/10 min; v) the xylene soluble fraction at 25 °C is lower than 5.0 wt. %; vi) the melting point is higher than 140°C.
摘要:
A process for producing ethylene polymer including compressing ethylene monomer in one or more compressors to a pressure from 1000 bar to 3000 bar; introducing the compressed ethylene monomer into one or more reactors; introducing a blend comprising an initiator and a modifier into the reactor where the ethylene monomer polymerizes forming a reaction mixture comprising unreacted ethylene monomer and ethylene polymer; and separating the ethylene polymer from the reaction mixture.