Pipe comprising a metallocene-catalyzed polyethylene resin
US9932427B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2015 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | May 10, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a pipe comprising at least one metallocene-catalyzed polyethylene resin, wherein the polyethylene resin has a multimodal molecular weight distribution and comprises at least two metallocene-catalyzed polyethylene fractions A and B, wherein fractions A and B are prepared in different reactors of at least two reactors connected in series, wherein the polyethylene resin comprises:at least 30% by weight and at most 50% by weight of the polyethylene fraction A, based on the total weight of the polyethylene resin, wherein fraction A has a melt index MI2 of at least 50 g/10 min as determined on the fluff of fraction A according to ISO 1133:1997 condition D at a temperature of 190° C. and under a load of 2.16 kg;wherein fraction B has a density of at most 0.9210 g/cm3; and wherein the polyethylene resin has a melt index MI5 of at least 0.10 g/10 min and of at most 1.0 g/10 min as determined according to ISO 1133:1997, condition T, at 190° C. and under a load of 5 kg; wherein the polyethylene resin has an HLMI of at least 4.0 g/10 min and at most 14.0 g/10 min, as measured according to the procedure of ISO 1133:1997 condition G with a temperature of 190° C. and a lo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.