Low and medium voltage cable joint filled with cold thermosetting resin and kit for the deployment thereof

Patent metadata

Field	Value
Publication number	US-9771447-B2
Application number	US-200913387339-A
Country	US
Kind code	B2
Filing date	Jul 31, 2009
Priority date	Jul 31, 2009
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A joint for electric power cable, preferably operating at low and medium voltage, filled with a resin obtained in situ by contemporaneously cold setting a composition containing a (meth)acrylate ester of an alkanol having from 6 to 20 carbon atoms with a curing agent acting also as a tackifying agent and selected from the group consisting of a urethaneacrylate and an epoxylacrylate oligomer having a functionality from 1 to 6 in amounts ranging from 0.1 parts to 10 parts by weight per 100 parts by weight of the methacrylate ester. A kit for preparing a cable joint includes the joint and the composition for preparing the cured resin. The resin contained in the joint does not exhibit cold flow and therefore does not flow from the cable joint.

First claim

The invention claimed is:

1. A joint for electric power cable filled with a resin obtained in situ by cold setting a composition comprising (meth)acrylate ester monomer of an alkanol having from 6 to 20 carbon atoms in the presence of a curing agent selected from an aromatic urethane-di-acrylate oligomer, in an amount from 0.3 to 5 parts by weight calculated per 100 parts of said (meth)acrylate ester,
wherein said composition is free of further additives that improve adhesion properties of the resin obtained in situ, and
wherein the resin obtained in situ does not show cold flow in a cold flow test according to French National Standard NF C33-010, Appendix G (1993).

2. The joint for electric power cable according to claim 1 , wherein said (meth)acrylate ester monomer is isodecylmethacrylate ester.

3. The joint for electric power cable according to claim 1 , wherein said curing agent oligomer has an average molecular weight from 300 to 8000 Da.

4. The joint for electric power cable according to claim 3 , wherein said curing agent oligomer has an average molecular weight from 800 to 6000 Da.

5. The joint for electric power cable according to claim 1 , wherein said composition comprises a filler.

6. The joint for electric power cable according to claim 1 , wherein said composition comprises a flame retardant agent.

7. The joint for electric power cable according to claim 1 , wherein said composition comprises (meth)acrylate ester monomer in an amount lower than 40% by weight with respect to the total weight of the composition.

8. The joint for electric power cable according to claim 1 , wherein said composition comprises (meth) acrylate ester monomer in an amount lower than 25% by weight with respect to the total weight of the composition.

Assignees

• Lamb Dave W
• Prysmian Spa

Inventors

• Lamb Dave W

Classifications

• C08F220/18 Primary

  with acrylic or methacrylic acids · CPC title

• H01B3/447 Primary

  from acrylic compounds · CPC title

• C08F222/1006

  of polyhydric alcohols or polyhydric phenols · CPC title

• C08F222/1065

  of alcohol terminated (poly)urethanes, e.g. urethane(meth)acrylates · CPC title

• C08F220/1811

  C10or C11-(Meth)acrylate, e.g. isodecyl (meth)acrylate, isobornyl (meth)acrylate or 2-naphthyl (meth)acrylate · CPC title