US 2010/0075087 A1 · Multimodal Polyethylene Resin for Pipe Made by a Single-site Catalyst

Abstract

The present invention relates to a polyethylene composition comprising a polyethylene base resin, which comprises a. an ethylene copolymer as fraction (A), and b. an ethylene homo- or copolymer as fraction (B), with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst. (SSC) is used in the polymerisation of at least one of fractions (A) and (B), and the base resin has (i) a density of below 940 kg/m3, and (ii) a MFR2 at 190 ° C./2.16 kg of 0.001 to 10 g/10 min, and the composition has (iii) a flexural modulus of from 300 to 820 MPa, and to a process for the production of such a composition, and to a pipe produced from such a composition.

Claims13

Dependent claims

A polyethylene composition comprising a polyethylene base resin, which comprises

a. an ethylene copolymer as fraction (A), and
b. an ethylene homo- or copolymer as fraction (B),
with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst (SSC) is used in the polymerisation of at least one of fractions (A) and (B), and the base resin has
(i) a density of below 940 kg/m3,
(ii) a MFR2 at 190° C./2.16 kg of 0.01 to 10 g/10 min and the composition has
(iii) a flexural modulus of from 400 to 820 MPa.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/517,103Filed 21 Nov 2007

Priority

EP 06024952.11 Dec 2006

Published

25 Mar 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

C08L 23/02
Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of…:…
C08L 23/0815
With unsaturated hydrocarbons only containing four or more carbon atoms: with aliphatic 1-olefins containing one carbon-to-carbon double bond
C08F 4/65912
Component covered by group C08F4/64 containing a transition metal-carbon bond: in combination with an organoaluminium compound
C08F 4/65916
Component covered by group C08F4/64 containing a transition metal-carbon bond: supported on a carrier, e.g. silica, MgCl2, polymer

Multimodal Polyethylene Resin for Pipe Made by a Single-site Catalyst

Life of this patent

Multimodal Polyethylene Resin for Pipe Made by a Single-site Catalyst

Life of this patent

Abstract

Claims13