Abstract

The invention relates to a coated pipe comprising a core, an adhesion layer coated on the core and an outer coating layer coated on the adhesion layer, wherein at least the adhesion layer comprises a propylene polymer composition comprising: (A) a propylene homo- or copolymer, and (B) an elastomeric component and to the use of such a propylene polymer composition for coating a pipe.

IPC Classes  ?

• C09D 123/10 - Homopolymers or copolymers of propene
• F16L 58/10 - Coatings characterised by the materials used by rubber or plastics

Abstract

The present invention deals with coated pipes having a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 6 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol, the ratio of the weight average molecular weight to the number average molecular weight, Mw/Mn, of from 15 to 50, a melt index MFR2 of from 0.05 g/10 min to 5 g/10 min, a melt index MFR5 of from 0.5 to 10 g/10 min and a density of from 930 kg/m3 to 955 kg/m3. The pipes can be coated with high throughput and good production economy. The coatings have good mechanical properties.

IPC Classes  ?

• C09D 123/06 - Polyethene
• C08L 23/08 - Copolymers of ethene

Abstract

The present invention provides a uniaxially oriented multilayer film comprising at least (i) a layer (A) and (ii) a layer (B), wherein said layer (A) comprises a linear low density polyethylene (LLDPE) comprising (e.g. selected from): - a multimodal LLDPE produced using a Ziegler Natta catalyst (znLLDPE), or - a LLDPE produced using a single site catalyst (mLLDPE) or - a mixture of a mLLDPE and a multimodal znLLDPE, said layer (B) comprises a multimodal LLDPE, and said multilayer film is in the form of a stretched film which is uniaxially oriented in the machine direction (MD) in a draw ratio of at least 1:3.

IPC Classes  ?

• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins

Abstract

The present invention relates to a pipe made of a polyethylene composition comprising a polyethylene base resin, which comprises c. an ethylene copolymer as fraction (A), and d. 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), the base resin having (i) a density of below 940 kg/m3, and (ii) a MFR5 at 190 °C / 5.00 kg of at least 0.20 g/10 min, and the polyethylene composition having a time to failure of at least 250 h measured according to ISO 1167 at 95°C and 4.3 MPa.

IPC Classes  ?

• C08L 23/06 - Polyethene
• C08L 23/08 - Copolymers of ethene
• F16L 9/12 - Rigid pipes of plastics with or without reinforcement

Abstract

The present invention concerns the use of a particular ethylene polymer for providing coating compositions displaying improved values for elongation at break at -45°C, rendering coating compositions prepared in accordance with the present invention suitable for low temperature applications.

IPC Classes  ?

• C09D 123/04 - Homopolymers or copolymers of ethene

Abstract

The present invention relates to the use of a silicon containing compound as drying agent of a polyolefln composition comprising a crosslinkable polyolefin with hydrolysable silane groups, wherein the silicon containing compound has a structure according to the formula (R1)X[Si(R2)y(R3)z]m wherein R1, which may be the same or different if more than one such group is present, is a monofunctional, or, if m = 2, is a bifunctional, hydrocarbyl residue comprising from 1 to 100 carbon atoms; R2, which may be the same or different if more than one such group is present, is a hydrocarbyloxy residue comprising from 1 to 100 carbon atoms; R3, is -R4SiR1 PR2 q, wherein p is 0 to 3, q is 0 to 3, with the proviso that p + q is 3, and R4 is -(CH2)rYs(CH2)t- where r and t independently are 1 to 3, s is 0 or 1 and Y is a difunctional heteroatomic group selected from -O-, -S-, -SO-, -SO2-, -NH-, -NR1- or -PR1-, where R1 and R2 are as previously defined; and x is 0 to 3, y is 1 to 4, z is 0 or 1, with the proviso that x + y + z = 4; and m = 1 or 2.

IPC Classes  ?

• C08K 5/00 - Use of organic ingredients

Abstract

The present invention relates to a Insulation layer for cables, a composition and a process thereof, showing improved stress whitening resistance by maintaining good mechanical and electrical properties and being environmental friendly.

IPC Classes  ?

• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 23/08 - Copolymers of ethene
• H01B 3/00 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties

Abstract

The present invention relates to a power or communications cable comprising an outer sheath layer made of a polyethylene composition comprising a base resin which comprises (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), and the base resin has a molecular weight distribution Mw/Mn of more than 14.

IPC Classes  ?

• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins
• C08F 10/02 - Ethene
• C08L 23/04 - Homopolymers or copolymers of ethene
• H01B 9/00 - Power cables
• H01B 11/00 - Communication cables or conductors

Abstract

The present invention relates to a crosslinkable polymer composition, comprising (i) an unsaturated polyolefin having a total amount of carbon- carbon double bonds/1000 carbon atoms of more than 0.37, and (ii) at least one ether and/or ester group containing additive selected from the group consisting of polyethylene glycol, a glycerol ester compound, polypropylene glycol, an amido group containing fatty acid ester, ethoxylated and/or propoxylated pentaerythritol, an alpha-tocopherol ester, an ethoxylated and/or propoxylated fatty acid, and derivatives thereof.

IPC Classes  ?

• C08L 23/02 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• C08K 5/10 - Esters; Ether-esters
• C08L 23/08 - Copolymers of ethene
• H01B 3/00 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties

Abstract

The present invention relates to crosslinkable polymer composition, comprising an unsaturated polyolefm having a total amount of carbon-carbon double bonds/ 1000 carbon atoms of at least 0.1, at least one scorch retarder, and at least one crosslinking agent.

IPC Classes  ?

• C08K 5/01 - Hydrocarbons
• C08K 5/14 - Peroxides
• C08L 23/02 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
• C08L 23/04 - Homopolymers or copolymers of ethene

Abstract

The invention relates to a semiconductive polymer composition for use in power cables. The composition comprises a multimodal ethylene homo- or copolymer produced in a polymerisation process comprising a single site catalyst whereby the polymer composition has a density of 870 to 930 kg/m3, a MFR2 of 1 to 30 g/l0min and a Mw/Mn of less than or equal to 10.

IPC Classes  ?

• C08K 3/04 - Carbon
• C08F 10/02 - Ethene
• C08L 23/08 - Copolymers of ethene
• H01B 1/24 - Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins

Abstract

The invention relates to a semiconductive polymer composition for use in power cables. The composition comprises a multimodal ethylene homo- or copolymer produced in a polymerisation process comprising a single site catalyst whereby the polymer composition has a density of 870 to 930 kg/m3, a MFR2 of 1 to 30 g/l0min and a Mw/Mn of less than or equal to 10.

IPC Classes  ?

• C08K 3/04 - Carbon
• C08F 10/02 - Ethene
• C08L 23/08 - Copolymers of ethene
• H01B 1/24 - Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins

Abstract

The present invention relates to a semiconductive polymer composition comprising a olefin homo- or copolymer wherein the composition has a direct current volume resistivity of less than 1000 Ohm.cm at 90 ~C, an elongation at break which after aging for 240 hours at 135 ~C does not change by more than 25 %, and a total number of structures of 20 or less in the SIED test. Furthermore, the present invention relates to an electric power cable comprising a conductor, a semicoducting layer and, adjacent to the semiconducting layer, an insulation layer, wherein the semiconducting layer is formed by said semiconductive polymer composition and to the use of said semiconducting polymer composition for the production of a semiconductive layer of an electric power cable.

IPC Classes  ?

• H01B 1/24 - Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
• H01B 1/04 - Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon, or silicon
• H01B 1/12 - Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
• H01B 1/20 - Conductive material dispersed in non-conductive organic material

Abstract

Insulation layer for cables comprising a heterophasic polymer composition hav~ing superior mechanical and electrical properties and being environmentally friendly. The heterophasic polymer composition comprises a polymer matrix and dis~persed therein a propylene copolymer having a weight average particle size of less than 1 ~m.

IPC Classes  ?

• C08L 23/10 - Homopolymers or copolymers of propene
• B32B 27/32 - Layered products essentially comprising synthetic resin comprising polyolefins
• C08L 23/16 - Ethene-propene or ethene-propene-diene copolymers
• H01B 7/00 - Insulated conductors or cables characterised by their form

Abstract

A peroxide crosslinked ethylene polymer pressure pipe and a method for the preparation thereof are described. The pipe is characterised in that it comprises an ethylene polymer with a density of less than 950 kg /m3 obtained by polymerisation with a single-site catalyst and having a shear thinning index, SHI5/300 of less than 20 and a MWD of <10. The method is characterised in that it comprises polymerising ethylene, optionally together with at least one comonomer, with a single-site catalyst to provide the above defined ethylene polymer, forming the ethylene polymer into a pipe by extrusion and crosslinking it.

IPC Classes  ?

• F16L 9/12 - Rigid pipes of plastics with or without reinforcement

Abstract

The present invention relates to a low voltage power cable comprising an insulation layer with a density below 1100 kg/m3 which comprises a polyolefin comprising 0.02 to 4 mol% of a compound having polar groups and further comprises a compound having hydrolysable silane groups and include 0.0001 to 3 wt.-% of a silanol condensation catalyst. Furthermore, the present invention relates to a process for the production of said low voltage power cable and to the use of a polyolefin comprising 0.02 to 4 mol% of a compound having polar groups in the production of an insulation layer for a low voltage power cable.

IPC Classes  ?

• H01B 3/44 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes acrylic resins