US 12,755,874 B2Granted

Process for producing cable with insulation layer

AssigneesDow Global Technologies LLC, Dow Silicones Corporation

InventorsYabin Sun, Gaoxiang Wu, Colin LiPiShan, Timothy J. Person, Wenxin Zhang, Kainan Zhang, Jie Ji

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Abstract

The present disclosure provides a process. In an embodiment, the process includes providing an initial cable core. The initial cable core includes (i) a conductor and (ii) an initial insulation layer. The initial insulation layer includes a crosslinkable polymeric composition composed of (a) an ethylene-based polymer composed of (1) ethylene monomer, (2) an optional α-olefin comonomer, and (3) an optional organosiloxane comonomer. The crosslinkable polymeric composition further includes (b) dicumyl peroxide (DCP), (c) an Si—H containing (AP) scavenger, (d) optional curing coagent, and (e) optional anti-oxidant. The process includes subjecting the initial cable core to a crosslinking procedure sufficient to crosslink the crosslinkable polymeric composition and form a cable core with a crosslinked insulation layer.

Claims17

Dependent claims

A process comprising:

providing an initial cable core comprising
(i) a conductor,
(ii) an initial insulation layer comprising a crosslinkable polymeric composition comprising
(a) an ethylene-based polymer comprising
(1) ethylene monomer,
(2) an optional α-olefin comonomer,
(3) an optional organosiloxane comonomer,
(b) dicumyl peroxide (DCP),
(c) an Si—H containing acetophenone (AP) scavenger,
(d) optional curing coagent, and
(e) optional anti-oxidant;
subjecting the initial cable core to a crosslinking procedure sufficient to crosslink the crosslinkable polymeric composition and form a cable core with a crosslinked insulation layer;
cooling the cable core with crosslinked insulation layer to ambient temperature to form a cooled cable core with a crosslinked insulation layer,
wherein the cooled cable core with the crosslinked insulation layer is composition (C), and a similar composition (SC) is defined as an identical composition to (C) except (SC) does not contain component (c), the Si—H containing (AP) scavenger,
wherein composition (C) has an RAP/CA and composition (SC) has an RAP/CA (SC), and
composition (C) has a Reduction in RAP/CA that is least 2.0% greater than RAP/CA (SC) as determined by Formula 5
Reduction
⁢
in
⁢
R
AP
/
CA
⁢
%
=
[
(
R
AP
/
CA
(
C
)
-
R
AP
/
CA
(
SC
)
)
/
R
AP
/
CA
(
SC
)
]
×
100
⁢
%
.
Formula
⁢
5

59 more elements

A cable comprising:

a cable core comprising
(i) a conductor;
(ii) a crosslinked insulation layer formed from a crosslinkable polymeric composition comprising
(a) an ethylene-based polymer comprising
(1) ethylene monomer,
(2) an optional α-olefin comonomer,
(3) an optional organosiloxane comonomer,
(b) dicumyl peroxide (DCP),
(c) an Si—H containing acetophenone (AP) scavenger,
(d) optional curing coagent, and
(e) optional anti-oxidant;
wherein the cable core is a cooled cable core comprising
a crosslinked insulation layer comprising decomposition byproducts selected from the group consisting of cumyl alcohol (CA), acetophenone (AP), methane, alpha methyl styrene, and combinations thereof;
and
the crosslinked insulation layer of the cooled cable core has an RAP/CA value less than 0.57 at a time from 1 minute after the crosslinking procedure and being cooled to ambient temperature to 60 minutes after the crosslinking procedure and being cooled to ambient temperature and prior to a degassing procedure;
wherein the cooled cable core with the crosslinked insulation layer is composition (C);
a similar composition (SC) is defined as an identical composition to (C) except (SC) does not contain component (c), the Si—H containing (AP) scavenger;
composition (C) has an RAP/CA (C) and composition (SC) has an RAP/CA (SC);
and
composition (C) has a Reduction in RAP/CA that is least 2.0% greater than RAP/CA (SC) as determined by Formula 5
Reduction
⁢
in
⁢
R
AP
/
CA
⁢
%
=
[
⁠
(
R
AP
/
CA
(
C
)
-
R
AP
/
CA
(
S
⁢
C
)
)
/
R
AP
/
CA
(
S
⁢
C
)
]
×
100
⁢
%
.
Formula
⁢
5

68 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/704,326Filed 17 Dec 2021
Published: US 2025/0125075 A117 Apr 2025
Granted: 6 Oct 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01B 19/00
Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
C08J 3/24
Processes of treating or compounding macromolecular substances: crosslinking, e.g. vulcanising, of macromolecules
C08K 5/06
Oxygen-containing compounds: ethers; Acetals; Ketals; Ortho-esters
C08K 5/54
Use of organic ingredients: silicon-containing compounds