Borealis Technology Oy

Other

James McGoldrick

Siegfried Liedauer

Carl-Gustaf Ek

Mats Bäckman

Franz Ruemer

Stefan Schiesser

Cecilia Rydin

Tony Lindstroem

Hans Sandberg

Bo Hovgard

David Walton

Polyolefin multilayer pipes consisting at least one of the layers of a &#x3b2;-nucleated propylene homopolymer and/or &#x3b2;-nucleated copolymers from 90.0 to 99.9% by weight of propylene and 0.1 to 10.0% by weight of &#x3b1;-olefins. The pipes are to be classified in ring stiffness class &#x2267;4. The pipes are suitable for non pressure pipe applications, preferably for outdoor use, for above as well as underground drainage and sewerage pipe systems, surface water pipes, pipes for cable protection, pipes for cold climate conditions and for indoor use, soil and waste water pipes.

Polyolefin multilayer pipe

The application relates to a polyethylene composition having a base resin, the base resin comprising (A) a first polyethylene fraction, and (B) a second polyethylene fraction, wherein the melt flow rate MFRof the first fraction is higher than the melt flow rate MFRof the second fraction, the flow rate ratio FRRof the polyethylene composition, defined as the ratio of melt flow rate MFRto melt flow rate MFR, is within the range of 15-28, and 10 the melt flow rate MFRof the polyethylene composition is within the range of 0.5-1.1 g/10 min.

Polymer composition for injection moulding

The invention relates to novel propylene polymers with improved properties especially with improved stiffness and impact strength comprising propylene homopolymers or propylene block copolymers with 90.0 to 99.9 wt % propylene and 0.1 to 10 wt % &#x3b1;-olefins with 2 or 4 to 18 carbon atoms, or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are &#x3b2;-nucleated propylene polymers, whereby the &#x3b2;-nucleated propylene homopolymers have an Ir&#x3c4;&#x2267;0.98 and the values for tensile modulus and Charpy impact strength as specified herein. The &#x3b2;-nucleated propylene block copolymers are polymers having an IR&#x3c4; of the propylene homopolymer block of &#x2267;0.98 and the values for tensile modulus and Charpy impact strength as also specified herein. The propylene polymers with an improved property spectrum are suitable for producing molded parts in a pipe system, such as pipes and fittings, inspection chambers, pipe ducting systems, extrusion or compression molded sheets and the like.

Propylene polymers with improved properties

Polyolefin coated steel pipes with high dynamic fracture toughness of the coating of the steel pipes during installation handling and in service, consisting of a steel pipe core, optionally an intermediate foamed plastic material, and a polyolefin coating of &#x3b2;-nucleated propylene copolymers whereby a test polyolefin pipe fabricated from the &#x3b2;-nucleated propylene copolymer has a critical pressure of &#x3e;25 bars and a dynamic fracture toughness &#x3e;3.5 MNm. The polyolefin coated steel pipes are suitable for off-shore transport of crude oil or gas products or district heating applications.

Polyolefin coated steel pipes

Industrial polyolefin piping system with improved stiffness, impact strength for use at high service temperature, comprising single or multilayer pipes, fitting, chambers, valves and vessels, consisting of &#x3b2;-nucleated propylene homopolymers with an IR&#x3c4;&#x2267;0.98 having a tensile modulus &#x2267;1500 MPa, a Charpy impact strength, notched, at +23&#xb0; C.&#x2267;30 kJ/mand a Vicat B temperature &#x3e;90&#xb0; C. and a Heat Distortion Temperature &#x3e;100&#xb0; C. The industrial polyolefin piping system is suitable for chemical plant constructions comprising single or multilayer pipes, fittings, chambers, valves and vessels with improved stiffness, impact strength and high service temperature, preferred for conveyance of natural gas, dangerous liquids and/or toxic liquids.

Industrial polyolefin piping system

Single- or multilayer propylene polymer pipes and pipe components for pipelines with improved resistance to rapid crack propagation made from a propylene homopolymer with a melt index of 0.05 to 10 g/10 min at 230&#xb0; C./2.16 kg or propylene block copolymer from 90.0 to 99.9 wt % of propylene and 0.1 to 10.0 wt % of a &#x3b1;-olefins with 2 or 4 to 18 carbon atoms with a melt index of 0.05 to 8 g/10 min at 230&#xb0; C./2.16 kg or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are &#x3b2;-nucleated propylene polymers, and the propylene polymer pipes for pipelines made from the &#x3b2;-nucleated propylene homopolymers have a rapid crack propagation characterized by a critical temperature of &#x2212;5 to +40&#xb0; C. and a critical pressure&#x2267;3 bar below the critical temperature and the propylene polymer pipes made from &#x3b2;-nucleated propylene block copolymers have a rapid crack propagation characterized by a critical temperature of &#x2212;25 to 0&#xb0; C. and a critical pressure&#x2267;3 bar below the critical temperature. The propylene polymer pipes with improved resistance to rapid crack propagation are suitable for the transportation of fluids and pressurized fluids such as natural gas, water and the like.

Growing community of inventors

Marchtrenk, Austria

James McGoldrick