Method of cross-linking a filled polymer based on polyethylene

Abstract

A method of cross-linking a composition comprising firstly a polyethylene-based silane-grafted polymer, and secondly a filler. The invention is remarkable in that the cross-linking method consists in mixing the composition with a condensation catalyst constituted by lauryl stannoxane of formula [(C4H9)2Sn(OOCC11H23)]2O.

Description

Claims

1. A method of cross-linking a composition comprising the steps of: firstly obtaining a polyethylene-based silane-grafted polymer;obtaining secondly a filler; and mixing the composition with a condensation catalyst constituted by lauryl stannoxane of formula [(C4H9)2Sn (OOCC11H23)]2O.

2. A cross-linking method according to claim 1, wherein the condensation catalyst is packaged in the form of a master batch.

3. A cross-linking method according to claim 2, wherein the master batch comprises a polymer matrix having lauryl stannoxane dispersed therein.

4. A cross-linking method according to claim 3, wherein the polymer matrix of the catalyst master batch is of nature identical to that of the base polymer of the composition.

5. A cross-linking method according to claim 1, wherein the composition includes 0.0036% to 0.0108% of condensation catalyst.

6. A cross-linking method according to claim 1, wherein the composition includes 90 pcr to 190 pcr of filler.

7. A cross-linking method according to claim 1, wherein the composition further includes at least one additive selected from the group consisting of a processing agent, an anti-oxidant, a colorant, an anti-UV agent, an anti-copper agent.

8. A cross-linking method according to claim 1, wherein the composition includes less than 3 pcr of processing agent.

9. A cross-linking method according to claim 1, wherein the composition includes 0.5 pcr to 5 pcr of anti-oxidant.

10. A cross-linking method according to claim 1, the method being implemented at ambient temperature.

11. A cross-linking method according to claim 1, the method being implemented in the open air.

12. A power and/or telecommunications cable, including at least one insulating covering made from a composition cross-linked in accordance with the method according to claim 1.

13. A cross-linkable composition comprising a polyethylene-based silane-grafted polymer and a filler, the composition further comprising a condensation catalyst constituted by lauryl stannoxane of formula [(C4H9)2Sn (OOCC11H23)]2O.

14. A cross-linkable composition according to claim 13, including 0.0036% to 0.0108% of condensation catalyst.