Polyolefin composition for medium/high/extra high voltage cables comprising benzil-type voltage stabiliser

Patent metadata

Field	Value
Publication number	US-2016304699-A1
Application number	US-201415101188-A
Country	US
Kind code	A1
Filing date	Dec 20, 2014
Priority date	Dec 20, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

The present invention relates to a polyolefin composition comprising (A) a polyolefin, (B) a benzil derivative comprising, preferably consisting of, the structural unit according to the following formula (I) wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 independently from each other are hydrogen, or a hydrocarbyl group which may contain heteroatoms or at least two of said R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 together with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic or non-aromatic ring fused to the ring system of formula (I) and at least R 1 or R 2 is an ester group. The invention also relates to a wire or cable, in particular a medium, high or extra high voltage cable, comprising such a composition, and to the use of such a composition for the production of a wire or cable, in particular a medium, high or extra high voltage cable.

First claim

1 . A polyolefin composition comprising
(A) a polyolefin, (B) a benzil derivative comprising, preferably consisting of, the structural unit according to the following formula (I):

wherein
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 independently from each other are hydrogen, or a hydrocarbyl group which may contain heteroatoms or at least two of said R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 together with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic or non-aromatic ring fused to the ring system of formula (I) and
at least R 1 or R 2 is an ester group.

2 . The polyolefin composition according to claim 1 wherein R 1 and R 2 are both ester groups.

3 . The polyolefin composition according to claim 2 wherein R 1 and R 2 are the same ester group.

4 . The polyolefin composition according to claim 1 wherein the ester group is selected from the group consisting of CH 3 CO 2 —, C 2 H 5 CO 2 —, C 3 H 7 CO 2 —, C 4 H 9 CO 2 —, C 5 H 11 CO 2 —, C 6 H 13 CO 2 —, C 7 H 15 CO 2 —, CO 8 H 17 CO 2 —, C 9 H 19 CO 2 —, C 10 H 21 CO 2 — and C 11 H 23 CO 2 —.

5 . The polyolefin composition according to claim 1 wherein R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are hydrogen.

6 . The polyolefin composition according to claim 2 wherein at least one of R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 is an alkyl group or at least two of said R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 together with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic ring fused to the ring system of formula (I), and the remaining of R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are hydrogen.

7 . The polyolefin composition according to claim 5 wherein R 1 and R 2 are CH 3 CO 2 — or C 11 H 23 CO 2 — and R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are hydrogen.

8 . The polyolefin composition according to claim 1 wherein compound (B) is present in the composition in an amount of 0.001 to 10 wt %.

9 . A master batch comprising
(i) a matrix polymer, and (ii) a benzil derivative (B) comprising, preferably consisting of, the structural unit according to the following formula (I):

wherein
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 independently from each other are hydrogen, or a hydrocarbyl group which may contain heteroatoms or at least two of said R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 together with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic or non-aromatic ring fused to the ring system of formula (I) and
at least R 1 or R 2 is an ester group.

10 . A cable comprising a layer made of a polyolefin composition according to claim 1 .

11 . The cable according to claim 10 wherein the cable is a medium, high or extra high voltage cable comprising an inner semiconductive layer, an insulating layer and an outer semiconductive layer.

12 . The cable according to claim 11 wherein at least the insulating layer is made of a polyolefin composition.

13 . (canceled)

14 . (canceled)

15 . (canceled)

16 . The polyolefin composition according to claim 3 wherein at least one of R3, R4, R5, R6, R7, R8, R9 and R10 is an alkyl group or at least two of said R3, R4, R5, R6, R7, R8, R9 and R10 together with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic ring fused to the ring system of formula (I), and the remaining of R3, R4, R5, R6, R7, R8, R9 and R10 are hydrogen.

Assignees

• Borealis Ag

Inventors

• Jarvid Markus
• Johansson Anette
• Andersson Mats
• Gubanski Stanislaw
• Englund Villgot
• Muller Christian
• Bjuggren Jonas Mattiasson

Classifications

• H01B3/441 Primary

  from alkenes · CPC title

• C08K5/07 Primary

  Aldehydes; Ketones · CPC title

• C08J3/22

  using masterbatch techniques · CPC title

• C08K5/10

  Esters; Ether-esters · CPC title

• C08K5/12 Primary

  of cyclic polycarboxylic acids · CPC title