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1. 发明专利

BRPI0509101A 未知
公开(公告)号：BRPI0509101A
公开(公告)日：2007-08-28
申请号：BRPI0509101
申请日：2005-03-31
申请人： BOREALIS TECH OY
发明人： BOCKMAN MATS , ANDERSSON MAY-LIS , EK CARL-GUSTAF , LUND KENNETH , VAHTERI MARKHU
IPC分类号： F16L9/12 , C08F10/02 , C08F110/02 , C08F210/16 , C08L23/08
摘要： A pressureless pipe and polymer composition for making such a pipe as well as the use of the polymer composition for pressureless pipes and supplementary parts, are disclosed. The polymer composition is characterised in that the polymer comprises a multimodal ethylene polymer including a copolymer of ethylene and a C4-C10 alpha -olefin comonomer; the ethylene polymer has a total density of at least 950 kg/m and a MFR5 of 0.2-2.0 g/10 min; the ethylene polymer has a modulus of elasticity, determined according to ISO 178 of more than 1200 MPa; the ethylene polymer has a resistance to slow crack growth, determined according to ASTM F 1473 of more than 1.5 hrs.

4. 发明专利

BRPI0610424A2 未知
公开(公告)号：BRPI0610424A2
公开(公告)日：2010-06-22
申请号：BRPI0610424
申请日：2006-04-27
申请人： BOREALIS TECH OY
发明人： VAN MARION REMKO , GUSTAFSSON BILL , BOCKMAN MATS , VAN PRAET ERIK
IPC分类号： C08F297/08 , C08L23/08
摘要： The present invention relates to a polyethylene resin comprising A) a first ethylene homo- or copolymer fraction, and B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B), characterized in that the polymer resin powder obtained directly after the final polymerisation step has a particle size distribution PSD 95/5 equal to or smaller than 12. Furthermore, the invention relates to a process for the production of a polymer composition comprising: (i) a step in which ethylene monomers, and optionally further alpha-olefin-comonomers, are polymerised in liquid phase in the presence of a polymerisation catalyst, (ii) a step in which ethylene monomers, and optionally further alpha-olefin comonomers, are polymerised in the gas phase in the presence of a polymerisation catalyst, and (iii) obtaining a polymer resin powder after the final polymerisation step wherein the powder has a particle size distribution PSD 95/5 equal to or smaller than 12.

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