Moisture cureable polymer for flexible cables
AssigneeBorealis AG
InventorsKjell Fossum, Stefan Hellstrom, Bernt-Ake Sultan
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Abstract
The invention relates to the use of a polyethylene composition comprising one or more ethylene copolymer(s) wherein the ethylene copolymer is a terpolymer containing monomer units with polar groups and monomer units with hydrolysable silane groups, wherein the monomer units with polar groups are present in an amount of more than 5 mol. % based on the total polyethylene composition, and a silanol condensation catalyst in an amount of 0.0001 to 5 wt. %, based on the total polyethylene composition for improving the adhesion between a layer of a cable comprising the polyethylene composition and a polyurethane resin.
Claims13
A method, comprising:
- adhering a layer of a cable comprising a polyethylene composition to a polyurethane cast resin at a cable joint;
- wherein the polyethylene composition comprises:
- a) one or more ethylene copolymer(s) wherein the ethylene copolymer is a terpolymer containing monomer units with polar groups and monomer units with hydrolysable silane groups, wherein the monomer units with polar groups are present in an amount of more than 5 mol. % based on the total polyethylene composition, and
- b) a silanol condensation catalyst in an amount of 0.0001 to 5 wt. %, based on the total polyethylene composition
- wherein the monomer units with polar groups are methyl acrylate and/or methyl methacrylate and wherein the polyurethane resin and the layer comprising the polyethylene composition adhere with an adhesion strength greater than 10 N/mm.
A method for connecting electrical conductors of two cables, each cable having an insulation layer, the method comprising
- 1) Stripping off part of the insulation layer at the end of each cable;
- 2) joining the stripped end of one cable with the stripped end of the other cable by adhering the insulation layer to a polyurethane resin;
- wherein the insulation layer comprises a polyethylene composition and wherein the polyethylene composition comprises:
- c) one or more ethylene copolymer(s) wherein the ethylene copolymer is a terpolymer containing monomer units with polar groups and monomer units with hydrolysable silane groups, wherein the monomer units with polar groups are present in an amount of more than 5 mol. % based on the total polyethylene composition, and
- d) a silanol condensation catalyst in an amount of 0.0001 to 5 wt. %, based on the total polyethylene composition
- wherein the monomer units with polar groups are methyl acrylate and/or methyl methacrylate, and wherein the polyurethane resin and the insulation layer adhere with an adhesion strength greater than 10 N/mm.
Dependencies are inferred from the claim text.