COMPOSITION OF POLYOLEFIN

Abstract

A crosslinkable polyolefin composition comprising an ethylene / alpha-olefin copolymer elastomer having a melt index of 0.6 to 6.2 grams per 10 minutes, an effective crosslinking amount of a monocyclic organosiloxane with alkenyl functionality and 0.29 to 0.44 wt% of an organic peroxide; products made therefrom; methods for making and using them; and articles containing them.

Description

POLYOLEFIN COMPOSITION BACKGROUND OF THE INVENTION Insulated electrical conductors typically comprise a conductive core covered by an insulating layer. The conductive core may be solid or stranded (e.g., a wire bundle). Some insulated electrical conductors may also contain one or more additional elements, such as semiconducting layer(s) and / or a protective jacket (e.g., wound wire, tape, or wrapping). Examples include metal wires and sheathed power cables, including those for use in low-voltage (LV, >0 to <5 kilovolts (kV)), medium-voltage (MV, 5 to <69 kV), high-voltage (HV, 69 to 230 kV), and extra-high-voltage (EHV, >230 kV) power transmission and distribution applications. Power cable evaluations may use AEIC / ICEA standards and / or IEC test methods. WO 2018 / 200319 AL recognized that the operating temperature of a power cable can be higher than the ambient temperature. Therefore, the wire and cable industry typically prefers an insulation layer made from a network polymer with low elongation. Ref. 335000 Low stress at high temperature (hot creep) in field use. The network polymer is produced by curing a crosslinkable polymer after the crosslinkable polymer has been extruded as an uncured insulating layer directly onto a wire, or onto an internal semiconducting layer covering the wire. The crosslinkable polymer must have a sufficiently high melt flow rate to allow for its extrusion. However, the higher the melt flow rate of the crosslinkable polymer, the greater the hot creep of the network polymer during field use. Various types of crosslinkable / network polymers that balance these competing property requirements are known in the industry. These include crosslinkable polyolefins and their crosslinked polyolefin products (network polymers). In the case of crosslinkable polyethylenes, the melt flow rate (melt index) desired by the industry is 2 grams per 10 minutes measured at 190 degrees Celsius (°C).16 kilograms (kg), ASTM D1238-04, melting index or I2. WO 2019 / 000654 AL recognized a problem that impairs the crosslinking and performance of the above polyolefins. Co-agents can be blended with polyolefins to give polyolefin compositions with increased crosslinking capacity, but conventional co-agents have their limitations. For example, a conventional co-agent typically has limited solubility or miscibility in polyolefin compositions. This limits the maximum loading level of the co-agent in the composition. It also causes the co-agent to migrate undesirably to the surface of the composition (e.g., granule surface), which limits the shelf life of the composition in storage. Conventional co-agents also present other problems. For example, after curing, they may produce crosslinked products with an insufficient degree of crosslinking. Or the compositions may cure too slowly for use in certain manufacturing operations (e.g.(manufacturing of power cables, injection molding, and film extrusion). 0 The compositions can cure prematurely (i.e., be prone to burning during cable extrusion, injection molding, and film extrusion). Not surprisingly, these problems have been a limitation for conventional co-agent structures used with polyolefins. Typically, conventional co-agents comprise conventional substructural groups bonded to two or more olefinic crosslinking groups. Conventional substructural groups are acyclic or cyclic multivalent groups comprising a backbone or ring, respectively, containing carbon atoms in the backbone or ring and, optionally, nitrogen and / or oxygen atoms, but not silicon atoms. The problem affects the performance of power cables operating at higher voltages. Burning can occur during extrusion and ultimately lead to failure of the insulation layer. The time to failure can be extended, thus increasing the reliability of the power supply and reducing maintenance costs by using a more robust material in the insulation layer. WO 2019 / 000654 Al solves its problem by using a co-agent that is a monocyclic organosiloxane with alkenyl functionality. A crosslinkable polyolefin composition comprising an effective amount of crosslinking of the monocyclic organosiloxane with alkenyl functionality may also comprise from 0.01 to 4.5 percent by weight (wt%) of an organic peroxide based on the total weight of the crosslinkable polyolefin composition. Examples with 0.50 wt% dicumyl peroxide are described. SUMMARY OF THE INVENTION We discovered that as the organic peroxide loading falls well below 0.50% by weight, the crosslinkable polyolefin composition may not achieve satisfactory hot creep performance, also known as hot deformation. A more rigorous global standard for power cable applications is a creep test. ML / a / ZUZZ / UU l JUZ hot creep less than (<) 175 percent (%) when held at 200 °C for 15 minutes. If the crosslinkable polyolefin composition of a power cable insulation layer has a hot creep greater than (>) 175% after being held at 200 °C for 15 minutes, the insulation layer may sag or deform during elevated temperature operation. The more the hot creep exceeds 175%, the greater the rate and / or amount that the insulation layer may sag or deform. Although power cables may not experience operating temperatures as high as 200°C, the hot creep test is a reliable way for the industry to evaluate materials for use in their insulation layers. In the power cable industry, a hot creep of <175% after the test sample has been subjected to 200°C for 15 minutes passes the hot creep test. A hot creep of <100% after 15 minutes at 200°C is especially desirable. Additionally, the residual elongation at room temperature should be <15% of the hot creep value measured at 200°C. Our technical solution to this problem includes a polyolefin composition comprising a carrier blend and, optionally, one or more additives, wherein the carrier blend comprises an ethylene / alpha-olefin copolymer elastomer having a melt index of 0.6 to 6.2 grams per 10 minutes (g / 10 min), an effective amount of crosslinking of a monocyclic organosiloxane with alkenyl functionality, and 0.29 to 0.44 wt% of an organic peroxide. Also included is a crosslinked polyolefin product manufactured by curing the polyolefin; methods for manufacturing and using it; and articles containing it. The carrier blend has satisfactory hot flow properties. Depending on the amount and type of any optional additives, the crosslinkable polyolefin composition itself may also have satisfactory hot flow properties. The polyolefin composition and products of the invention are useful in any application where polyolefins are used, including crosslinked polyolefins, including extruded articles, coatings, films, sheets and injection-molded articles, as well as electricity transmission applications and other unrelated applications such as containers or vehicle parts. DETAILED DESCRIPTION OF THE INVENTION The following are modalities of the technical solution, some numbered for easy reference. Aspect 1. A crosslinkable polyolefin composition comprising 100 to 30 percent by weight (wt. %) of a carrier mixture and 0 to 70 wt. £100 to 70 wt. £100, respectively, of one or more optional additives; wherein the carrier mixture consists of 97.56 to 99.31 wt. £100 of (A) a polyethylene polymer, 0.40 to 2.0 wt. of a monocyclic organosiloxane with alkenyl functionality, and 0.29 to 0.44 wt. of (C) an organic peroxide; wherein the (A) polyethylene polymer is selected from (A1) and (A2): (A1) an ethylene / alpha-olefin copolymer elastomer having a melt index of 0.6 to 6.2 grams per 10 minutes (g / 10 min) and a density of 0.854 to 0.912 grams per cubic centimeter (g / cm3), measured in accordance with ASTM D79213, Method B or (A2) a mixture of (A1) and a low-density polyethylene (LOPE) having a melt index of 0.8 to 2.5 g / 10 min, wherein the mixture has a mass weight ratio of (Al) to the weight of (LDPE) ((Al) / (LDPE) w / w) of 99.9 / 0.1 to 1.0 / 3.0, alternatively from 99.9 / 0.1 to 1.0 / 2.0, alternatively from 99.9 / 0.1 to 1.0 / 1.0, alternatively from 99.9 / 0.1 to 2.5 / 1.0 and wherein both melting indices are measured in accordance with ASTM D1238-04 (190 °C, 2.16 kg; I2); wherein the (B) monocyclic organosiloxane with alkenyl functionality is of formula (I): [R1, R2SiO2 / 2]n(I), wherein the subscript n is an integer greater than or equal to 3; each R1 is independently an alkenyl (C2-C4) or an H2C=C (Rla) -C (=0) -O- (CH2) m—whereas Rla is H or methyl and the subscript m is an integer from 1 to 4; and each R2 is independently H, alkyl (C1-C4), phenyl, or R1; and wherein the carrier mixture of the crosslinkable polyolefin composition has a hot creep of less than 175% after being held at 200 °C for 15 minutes, as measured by the hot creep test method (described below); provided that the crosslinkable polyolefin composition is free from (i.e., lacks) a phosphazene base; and provided that if the melt index (I2) of the (Al) ethylene / alpha-olefin copolymer elastomer is greater than 2 g / 10 min, the amount of (C) organic peroxide is from 0.35 to 0.44% by weight of the carrier mixture. The total weight of constituents (A), (B), and (C) is 100.00% by weight of the carrier mixture. The total weight of constituents (A), (B), (C), and one or more optional additives, if any, is 100.00% by weight of the crosslinkable polyolefin composition. The crosslinkable polyolefin composition may be free of any ring-opening catalyst. In some embodiments, the (Al) ethylene / alpha-olefin copolymer elastomer is an ethylene / l-octene copolymer elastomer or an ethylene / l-butene copolymer elastomer; alternatively, (Al) is the ethylene / l-octene copolymer elastomer. In some forms, the hot creep value is 23% to 145%, alternatively 23% to 87%, alternatively from. ΜΛ / a / ZUZZ / UU 1JUZ % to 82%, alternatively from 24% to 45%, alternatively from 24% to 29%. Aspect 2. The crosslinkable polyolefin composition of aspect 1, wherein the (A) polyethylene polymer is further defined by any of the limitations (i) to (vii): (i) the (A) polyethylene polymer is the (A1) ethylene / alpha-olefin copolymer elastomer; (ii) the (A) polyethylene polymer is the (A1) ethylene / alpha-olefin copolymer elastomer and (A1) is an ethylene / octene copolymer having a melt index of 0.80 to 5.4 g / 10 min, alternatively 0.9 to 5.1 g / 10 min and a density of 0.855 to 0.912 g / cm3, alternatively 0.855 to 0.910 g / cm3; (iii) the (A) polyethylene polymer is the (Al) ethylene / alpha-olefin copolymer elastomer and (Al) is an ethylene / l-butene copolymer having a melt index of 0.80 to 5.4 g / 10 min, alternatively from 1.1 to 5.1 g / 10 min and a density of 0.859 to 0.890 g / cm3, alternatively from 0.861 to 0.890 g / cm3; (iv) the (A) polyethylene polymer is the (A2) mixture and (A2) is a mixture of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is an LDPE having a melt index (I2) of 1.75 to 2.49 g / 10 min and a density of 0.918 to 0.920 g / cm3; (v) the (A) polyethylene polymer is the (A2) mixture and (A2) is a mixture of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is a. LDPE having a melt index (I2) of 2.4 g / 10 min and a density of 0.920 g / cm3; (vi) the (A) polyethylene polymer is the (A2) mixture and (A2) is a mixture of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is an LDPE having a melt index (I2) of 1.9 g / 10 min and a density of 0.9183 g / cm3; and (vii) the (A) polyethylene polymer is the (A2) blend and (A2) is a blend of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is an LDPE having a melt index (I2) of 0.80 to 1.24 g / 10 min and a density of 0.917 to 0.923 g / cm3. The (A) polyethylene polymer may be 98.2 to 98.6% by weight of the carrier blend and / or the carrier blend may be 99.4 to 99.90% by weight of the crosslinkable polyolefin composition. Aspect 3. The crosslinkable polyolefin composition of Aspect 1 or 2, wherein the subscript n is 4 and the (B) monocyclic organosiloxane of Formula (I) is described by any one of the limitations (i) to (x): (i) each R1 is independently a (C2-C2) alkenyl; and each R2 is independently H, (C1-C2) alkyl or (C2-C2) alkenyl; (ii) each R1 is vinyl; and each R2 is independently (C1-C2) alkyl; (iii) each R1 is vinyl; and each R2 is methyl; (iv) each R1 is allyl; and each R2 is independently (C2-C2) alkyl; (v) each R1 is allyl; and each R2 is methyl; (vi) each R1 is independently H2C=C (Rla)-C (=0)-O-(CH2) m- where Rla is H or methyl and the subscript m is an integer from 1 to 4; and each R2 is independently H, alkyl (Ci-C2) or alkenyl (C2-C3) ; (vii) each R1 is independently H2C=C (Rla)-C (=0)-O-(CH2)m- where Rla is H and the subscript m is 3; and each R2 is independently alkyl (Ci-C2) ;(viii) each R1 is independently H2C=C (Rla)-C (=0)-O-(CH2)m- where Rla is methyl and the subscript m is 3; and each R2 is independently (C1-C2) alkyl; (ix) the crosslinkable polyolefin composition does not contain 24 wt% or more of, alternatively does not contain 22 wt% or more of, alternatively does not contain 20.0 wt% or more of, alternatively does not contain 15 wt% or more of, alternatively does not contain 10 wt% or more of, alternatively is free from any inorganic filler; and (x) a combination of limitation (ix) and any of limitations (i) to (viii). In some respects, the (B) monocyclic organosiloxane of Formula (I) is 2,4,6,8-tetramethyl-1-2,4,6,8-tetravinylcyclotetrasiloxane, (Dvi)4(CAS No. 2554-06-5). Aspect 4. The crosslinkable polyolefin composition of any of aspects 1 to 3 comprising, in addition to 0.01 to 0.10 wt% of (D) an anti-burning agent or 0.10 to 0.30 wt% of (E) an antioxidant or a combination of (D) and (E); and wherein an embodiment of the crosslinkable polyolefin composition consisting of constituents (A) to (E) has a hot creep of less than 175% after being held at 200 °C for 15 minutes, as measured by the Hot Creep Test Method. In some aspects, (D) is alpha-methylstyrene dimer (AMSD) and (E) is 4,6-bis(octylthiomethyl)-2-methylphenol (also known as 4,6-bis(octylthiomethyl)-orthocresol). In some modalities of any of aspects 1 to 6, the modality of the crosslinkable polyolefin composition consisting of constituents (A) to (E) also has a significant crosslinking extent as indicated by an MH greater than (>) 2.0 dN-m, alternatively >2.5 dN-m, alternatively >3.0 dN-m (e.g., from 2.5 to 4.0 dN-m), as measured by the Moving Die Rheometer Test Method (described below). In some embodiments, the MH value is from 2.1 to 5.4 dN-m, alternatively from 2.7 to 5.1 dN-m, alternatively from 2.8 to 5.1 dN-m, alternatively from 3.1 to 5.1 dN-m, alternatively from 3.7 to 5.1 dN-m. Working examples of the invention IE1 to IE6 described below have shown that the modality of the crosslinkable polyolefin composition consisting of constituents (A) to (E) has a hot creep of less than 175% after being held at 200°C for 15 minutes, as measured by the Hot Creep Test Method, and a significant crosslinking range as indicated by the MH greater than (>) 2.0 dN-m, alternatively >2.5 dN-m, alternatively >3.0 dN-m (e.g., from 2.5 to 4.0 dN-m), as measured by the Moving Die Rheometer Test Method. In some embodiments, the MH value is as described above and the hot creep value is 23% to 145%, alternatively 23% to 87%, alternatively 23% to 82%, alternatively 24% to 45%, alternatively 24% to 29%. Aspect 5. The crosslinkable polyolefin composition of any of aspects 1 to 4, wherein the crosslinkable composition comprises the carrier mixture and one or more additives; wherein the one or more additives are selected from the group consisting of additives (F) to (M): (F) a filler; (G) a flame retardant; (H) a hindered amine stabilizer; (I) a tree retarder; (J) a methyl radical scavenger; (K) a conventional co-agent; (L) a nucleating agent; and (M) carbon black; provided that the (F) filler does not include any previously omitted filler. The total amount of one or more additives (F) to (M) may be from 0.1 to 69% by weight, alternatively from 0.1 to 20% by weight, alternatively from 0.1 to 10% by weight, alternatively from 0.1 to 5.0% by weight, of the crosslinkable polyolefin composition and carrier mixture may be from 99.9 to 31% by weight, alternatively from 99.9 to 80% by weight, alternatively from 99.9 to 90% by weight, alternatively from. 99.9 to 95.0% by weight of the crosslinkable polyolefin composition, respectively. In some respects, the crosslinkable polyolefin composition is any of the examples of the invention IE1 to IE6, or alternatively any of IE1 to IE3, IE5 and IE6, which are described below. Aspect 6. A method for preparing the crosslinkable polyolefin composition of aspect 1, the method comprising mixing the amount of (A) polyethylene polymer; the amount of (B) monocyclic organosiloxane of formula (I) and the amount of (C) organic peroxide together to prepare the carrier mixture. Aspect 7. A free-radical curing method for the crosslinkable polyolefin composition of any one of aspects 1 to 5 to produce a crosslinked polyolefin product, the method comprising heating the crosslinkable polyolefin composition to an effective curing temperature such that the (A) polyethylene polymer reacts with the (B) monocyclic organosiloxane of formula (I), thereby producing a crosslinked polyolefin product. The crosslinked polyolefin product is free of a phosphazene base, alternatively any ring-opening catalyst, and a product made therefrom. In some respects, the crosslinkable polyolefin composition produced by the method is the crosslinkable polyolefin composition of any one of aspects 1 to 5. Aspect 8. A crosslinked polyolefin product prepared by the curing method of aspect 7. In some embodiments, the crosslinkable polyolefin composition, after being held at 182 °C in a moving-die rheometer for 12 minutes, produces an embodiment of the crosslinked polyolefin product having a significant crosslinking range as indicated by an MH greater than (>) 2.0 dN-m, alternatively >2.5 dN-m, alternatively >3.0 dN-m. These values ​​are remarkable achievements in only 12 minutes. In some embodiments, the MH value is from 2.1 to 5.4 dN-m, alternatively from 2.7 to 5.1 dN-m, alternatively from 2.8 to 5.1 dN-m, alternatively from 3.1 to 5.1 dN-m, alternatively from 3.7 to 5.1 dN-m. Aspect 9. A manufactured article comprising a molded shape of the crosslinkable polyolefin composition of any of aspects 1 to 5 or the crosslinked polyolefin product of aspect 10. In some aspects, the manufactured article is selected from: coatings, films, sheets, extruded articles, and injection-molded articles. For example, coated conductors, wire and cable sheathing for transmitting electrical power or telecommunications, agricultural films, food packaging, garment bags, supermarket bags, heavy-duty bags, industrial films, pallets and shrink wraps, pouches, buckets, freezer containers, lids, and toys. Aspect 10. A sheathed conductor comprising a conducting core and an insulating layer at least partially covering the conducting core, wherein at least a portion of the insulating layer comprises the crosslinkable polyolefin composition of any of aspects 1 to 5 or the crosslinked polyolefin product of aspect 8. The modalities of the conducting core may be a cable having proximal and distal ends, at least one of which may be free of the insulating layer. Aspect 11. A method for transmitting electricity, the method comprising applying a voltage along the conductive core of the sheathed conductor of aspect 10 to generate a flow of electricity through the conductive core. The conductive core may be a wire having proximal and distal ends and the electricity may flow from one end of the wire to the other. The crosslinkable polyolefin composition and the crosslinked polyolefin product made from it can be free of a telekelic polyolefin and a crosslinked polyolefin product made from it, respectively. A telekelic polyolefin molecule has a backbone having a terminal alkenyl group at each end. In some respects, the crosslinkable polyolefin composition is of aspect 1 or 2, wherein the subscript n is 3 and the (B) monocyclic organosiloxane of formula (I) is described by any of the limitations (i) to (x): (i) each R1 is independently an (C2-C3) alkenyl; and each R2 is independently H, (C1-C2) alkyl or (C2-C3) alkenyl; (ii) each R1 is vinyl; and each R2 is independently (C1-C2) alkyl; (iv) each R1 is vinyl; and each R2 is methyl; (iv) each R1 is allyl; and each R2 is independently (C1-C2) alkyl; (v) each R1 is allyl; and each R2 is methyl; (vi) each R1 is independently H2C=C (Rla)-C (=0)-O-(CH2) m- where Rla is H or methyl and the subscript m is an integer from 1 to 4; and each R2 is independently H, alkyl (C1-C2) or alkenyl (C2-C3) ; (vii) each R1 is independently H2C=C (Rla) -C (=0) -0- (CH2)m_where Rla is H and the subscript m is 3; and each R2 is independently alkyl (C1-C2) ;(viii) each R1 is independently H2C=C (Rla)-C (=0)-0-(CH2)m- where Rla is methyl and the subscript m is 3; and each R2 is independently (C1-C2) alkyl; (ix) the crosslinkable polyolefin composition does not contain 24 wt% or more of, alternatively does not contain 22 wt% or more of, alternatively does not contain 20.0 wt% or more of, alternatively does not contain 15 wt% or more of, alternatively does not contain 10 wt% or more of, alternatively is free from an inorganic filler selected from the group consisting of aluminum oxide, aluminum silicate, calcium silicate, magnesium silicate, silica, titanium dioxide and mixtures thereof; and (x) a combination of limitation (ix) and any of limitations (i) to (viii). In some respects, the crosslinkable polyolefin composition is of aspect 1 or 2, wherein the subscript n is 5 or 6 and the (B) monocyclic organosiloxane of formula (I) is described by any of the limitations (i) to (x): (i) each R1 is independently an (C2-C3) alkenyl; and each R2 is independently H, (C1-C2) alkyl or (C2-C3) alkenyl; (ii) each R1 is vinyl; and each R2 is independently (C1-C2) alkyl; (iii) each R1 is vinyl; and each R2 is methyl; (iv) each R1 is allyl; and each R2 is independently (C1-C2) alkyl; (v) each R1 is allyl; and each R2 is methyl; (vi) each R1 is independently H2C=C (Rla)-C (=0)-O-(CH2) m- where Rla is H or methyl and the subscript m is an integer from 1 to 4; and each R2 is independently H, alkyl (C1-C2) or alkenyl (C2-C3) ; (vii) each R1 is independently H2C=C (Rla)-C (=0)-0-(CH2)m_where Rla is H and the subscript m is 3; and each R2 is independently alkyl (C1-C2) ;(viii) each R1 is independently H2C=C (Rla)-C (=0)-0-(CH2)m- where Rla is methyl and the subscript m is 3; and each R2 is independently (C1-C2) alkyl; (ix) the crosslinkable polyolefin composition does not contain 24 wt% or more of, alternatively does not contain 22 wt% or more of, alternatively does not contain 20.0 wt% or more of, alternatively does not contain 15 wt% or more of, alternatively does not contain 10 wt% or more of, alternatively is free from an inorganic filler selected from the group consisting of aluminum oxide, aluminum silicate, calcium silicate, magnesium silicate, silica, titanium dioxide and mixtures thereof; and (x) a combination of limitation (ix) and any of limitations (i) to (viii). In some aspects, the crosslinkable polyolefin composition is free of any ring-opening catalyst. In some aspects, when the subscript n is 4, the crosslinkable polyolefin composition does not contain 24 wt% or more of, or alternatively, does not contain 22 wt% or more of. alternatively does not contain 20.0% by weight or more of, alternatively does not contain 15% by weight or more of, alternatively does not contain 10% by weight or more of, Alternatively, it is free from an inorganic filler selected from the group consisting of aluminum oxide, aluminum silicate, calcium silicate, magnesium silicate, silica, titanium dioxide, and mixtures thereof. In some respects, n is 3, 4, 5, or 6; alternatively 3, 4, or 5; alternatively 5 or 6; alternatively 3 or 4; alternatively 3; alternatively 4; alternatively 5; alternatively 6. The carrier blend of the crosslinkable polyolefin composition has a hot creep of less than 175% after being held at 200 °C for 15 minutes, or alternatively a hot creep of less than 100% after being held at 200 °C for 15 minutes. Depending on the quantity and type of any optional additives, the crosslinkable polyolefin composition itself may also have a hot creep of less than 175% after being held at 200 °C for 15 minutes, or alternatively a hot creep of less than 100% after being held at 200 °C for 15 minutes. In some embodiments, the hot creep value is 23% to 145%, or alternatively 23% to 87%, or alternatively 23% to 82%, or alternatively 24% to 45%, or alternatively 24% to 29%. Not limited to theory, it is believed that the higher the melting index (I2) of the (Al) ethylene / alpha-olefin copolymer elastomer is above 2.0 g / 10 min, the higher the loading of (C) organic peroxide desired for the carrier mixture to achieve a hot flow of less than 175% after being held at 200 °C for 15 minutes. This is the reason for the condition that if the melt index (I2) of the (Al) ethylene / alpha-olefin copolymer elastomer is greater than 2 g / 10 min, the amount of (C) organic peroxide is 0.35 to 0.44 wt%. In some embodiments, the carrier mixture of the crosslinkable polyolefin composition, after being held at 182 °C in a moving-die rheometer for 12 minutes, yields a crosslinked polyolefin product that has a significant crosslinking range, as indicated by an MH greater than (>) 2.0 dN-m, alternatively >2.5 dN-m, or alternatively >3.0 dN-m (e.g., from 2.5 to 4.0 dN-m). These values ​​are remarkable achievements in just 12 minutes. Depending on the amount and type of any optional additives, the crosslinkable polyolefin composition itself may have a significant crosslinking range, as indicated by an MH greater than (>) 2.0 dN-m, alternatively >2.5 dN-m, or alternatively >3.0 dN-m (e.g., from 2.5 to 4.0 dN-m). In some modes, the MH value is from 2.1 to 5.4 dN-m, alternatively from 2.7 to 5.1 dN-m, alternatively from 2.8 to 5.1 dN-m, alternatively from 3.1 to 5.1 dN-m, alternatively from 3.7 to 5.1 dN-m. In some embodiments, the crosslinkable polyolefin composition further comprises one or more additives, and the type and quantity of the one or more optional additives (e.g., constituents (D) and (E)) are such that the crosslinkable polyolefin composition itself may also have a hot creep of less than 175% after being held at 200 °C for 15 minutes, or alternatively, a hot creep of less than 100% after being held at 200 °C for 15 minutes. In some embodiments, the hot creep value is from 23% to 145%, or alternatively, from ML / a / ZUZZ / UU l JUZ % to 87%, alternatively from 23% to 82%, alternatively from 24% to 45%, alternatively from 24% to 29%. In some of these embodiments, the crosslinkable polyolefin composition itself may also have a significant crosslinking range as indicated by an MH greater than (>) 2.0 dN-m, alternatively >2.5 dN-m, alternatively >3.0 dN-m (e.g., from 2.5 to 4.0 dN-m). In some modalities, the MH value is from 2.1 to 5.4 dN-m, alternatively from 2.7 to 5.1 dN-m, alternatively from 2.8 to 5.1 dN-m, alternatively from 3.1 to 5.1 dN-m, alternatively from 3.7 to 5.1 dN-m The polyolefin composition of the invention, containing the polyolefin polymer and the monocyclic organosiloxane with alkenyl functionality, can be cured (crosslinked) by irradiation or an organic peroxide without ring-opening of the monocyclic organosiloxane with alkenyl functionality. The curing reaction is carried out in such a way that the monocyclic organosiloxane with alkenyl functionality does not yield a polymerized siloxane (silicone polymer). Without being limited to theory, it is believed that the constituents of the crosslinkable polyolefin composition are chosen so that during the curing of the crosslinkable polyolefin composition, ring-opening of the monocyclic organosiloxane with alkenyl functionality does not occur to give an open-ring (linear or branched) organosiloxane oligomer with silanol (S-OH) functionality, and therefore, the polymerized siloxane (silicone polymer) does not form in situ within the polyolefin polymer.The monocyclic organosiloxane with alkenyl functionality cannot undergo ring opening, at least in part, because the crosslinkable polyolefin composition does not contain, and therefore the curing reaction is carried out in the absence of, a ring-opening catalyst. Excluded ring-opening catalysts are known and include a phosphazene base. The phosphazene base has a P=N core structure, in which the free N valences are bonded to hydrogen, hydrocarbyl, -P=N, or =PN, and the free P valences are bonded to =N or -N. Examples of phosphazene bases are found in US 8,426,519 B2, column 9, line 29, to column 10, line 31. Other types of ring-opening catalysts are known, which are excluded from the crosslinkable polyolefin composition and, therefore, from the crosslinked polyolefin product prepared from it. For examples, see FO Stark et al.Silicones, Comprehensive Organometallic Chemistry, Volume 2, 305, Pergamon Press (1982). Examples include strong acids, such as trifluoromethanesulfonic acid and its metal salts, sulfuric acid, perchloric acid, and hydrochloric acid; cationic ring-opening catalysts such as metal halides; and anionic ring-opening catalysts such as organolithium compounds, alkali metal oxides, and alkali metal hydroxides. In the absence of the ring-opening catalyst, the polyolefin composition of the invention undergoes crosslinking of the alkenyl-functionalized monocyclic organosiloxane with the polyolefin polymer by free-radical curing to form the crosslinked polyolefin product. The crosslinking of the invention occurs advantageously without ring opening of the alkenyl-functionalized monocyclic organosiloxane even in the presence of ambient humidity.The crosslinking methods of the invention avoid the harmful effect(s) of the phosphazene base at the crosslinking level (scope or degree of crosslinking). Unpredictably, the polyolefin composition of the invention containing the monocyclic organosiloxane with alkenyl functionality or the crosslinked polyolefin product of the invention prepared therefrom, has improved hot creep performance after being held at 200 °C for 15 minutes. The term ring-opening catalyst, as used in the present description, means a substance that initiates a ring-opening polymerization reaction and / or enhances the rate of a ring-opening polymerization reaction of a cyclic siloxane monomer. The term ring-opening polymerization, as used in the present description, is a type of chain-growth polymerization reaction in which a reactive end of a polymer chain opens the ring of a cyclic monomer to give a longer polymer chain. The crosslinkable polyolefin composition and its carrier mixture can be manufactured in several different ways. In some respects, they can be prepared by blending a melt of the (A) polyolefin polymer with the (B) monocyclic organosiloxane of formula (I) and the (C) organic peroxide to obtain the carrier mixture and a modality of the crosslinkable polyolefin composition consisting of the carrier mixture. In other respects, they can be prepared by blending a melt of the (A) polyolefin polymer with the (B) monocyclic organosiloxane of formula (I) and (C) organic peroxide and any optional constituents (e.g., any zero, one, or more of constituents (D) to (M)) to give the crosslinkable polyolefin composition as a mixture of constituents (A), (B), (C), and any optional constituents.In other respects, they can be prepared by mixing a melt of the (A) polyolefin polymer with the (B) monocyclic organosiloxane of formula (I) to give a premixture, cooling the premixture to a temperature below 100 °C (e.g., from 20° to 80 °C) and soaking or impregnating the (C) organic peroxide into the premixture to give the carrier mixture and a modality of the crosslinkable polyolefin composition consisting of the carrier mixture. The mixing may involve forming a composition, kneading, or extruding. To facilitate mixing, one or more constituents (e.g., (B), additives (C), (D), (E), etc.) may be provided in the form of an additive master mix in a portion of (A). In another aspect, the crosslinkable polyolefin composition can be prepared by contacting the (B) monocyclic organosiloxane of formula (I), the (C) organic peroxide, and optionally zero, one, or more of any optional constituents (e.g., (D) anti-burn agent and / or (E) antioxidant) with a non-melted form of the (A) polyolefin polymer to give the crosslinkable polyolefin composition as a mixture of constituents (A), (B), (C), and any optional constituents. The contact may comprise soaking, embedding, or injection. Constituents (B), (C), and any optional constituent(s) may be combined independently by blending, extruding, embedding, injection, kneading, or soaking. The blending or contact may be carried out at a temperature of approximately 20° to 100°C for 0.1 to 100 hours. e.g. , 60° to 80°C for 0.1 to 24 hours.Higher temperatures may be used for mixing or contact, provided that the organic peroxide (C) is not subjected to these temperatures. Afterward, if desired, the mixture may be cooled to a temperature below the decomposition temperature of the peroxide. ML / a / ZUZZ / UU l JUZ from mixing or coming into contact with (C) organic peroxide. If desired, the crosslinkable polyolefin composition can be cooled to a storage temperature (e.g., 23 °C) and stored for a period of time of 1 hour, 1 week, 1 month or more. The crosslinkable polyolefin composition can be prepared as a one-part formulation, or alternatively, as a multi-part formulation, such as a two-part formulation, or alternatively, a three-part formulation. There is no inherent reason why any combination of constituents cannot be included in any part or parts of these formulations. The (Al) ethylene / alpha-olefin copolymer elastomer having a melt index of 0.6 to 6.2 g / 10 min and a density of 0.854 to 0.912 g / cm3 may be a single such as ethylene / alpha-olefin copolymer elastomer or a mixture of any two or more of the ethylene / alpha-olefin copolymer elastomers. The constituent (Al) ethylene / alpha-olefin copolymer elastomer having a melt index of 0.6 to 6.2 g / 10 min and a density of 0.854 to 0.912 g / cm3 can be an ENGAGE™ ethylene / l-octene copolymer of ENGAGE™ 8100 (I2 = 1 g / 10 min, density 0.870 g / cm3), 8107 (I2 = 1 g / 10 min, density 0.870 g / cm3), 8200 (I2 = 5 g / 10 min, density 0.870 g / cm3), 8207 (I2 = 5 g / 10 min, density 0.870 g / cm3), 8452 (I2 = 3 g / 10 min, density 0.875 g / cm3), 8003 (I2 = 1 g / 10 min, density 0.885 g / cm3), 8440 (I2 = 1.6 g / 10 min, density 0.897 g / cm3), 8480 (I2 = 1 g / 10 min, density 0.902 g / cm3), 8450 (I2 = 3 g / 10 min, density 0.902 g / cm3), 8540 (I2 = 1 g / 10 min, density 0.908 g / cm3) and 8842 (I2 = 1 g / 10 min, density 0.857 g / cm3), all available from The Dow Chemical Company. The constituent (Al) ethylene / alpha-olefin copolymer elastomer having a melt index of 0.6 to 6.2 g / 10 min and a density of 0.854 to 0.912 g / cm3 may be an ENGAGE™ ethylene / 1-butene copolymer selected from ENGAGE™ 7487 (I2 = 1.2 g / 10 min, density 0.862 g / cm3), 7457 (I2 = 3.6 g / 10 min, density 0.862 g / cm3), 7447 (I2 = 5 g / 10 min, density 0.865 g / cm3), 7367 (I2 = 0.8 g / 10 min, density 0.874 g / cm3), 7270 (I2 = 0.8 g / 10 min, density 0.880 g / cm3), 7277 (I2 = 0.8 g / 10 min, density 0.880 g / cm3) and 7256 (I2 = 2.5 g / 10 min, density 0.885 g / cm3), all available from The Dow Chemical Company. (A2) a mixture of (Al) and LDPE having a melting index of 1.50 to 2.49 g / 10 min wherein the LDPE may be a single LDPE of that type or a mixture of any two or more such LDPEs. (A2) is a mixture of (Al) and LDPE having a melting index of 1.50 to 2.49 g / 10 min, where the LDPE can be selected from LDPE-1 (I21.9 g / 10 min and density 0.9183 g / cm3), LDPE-2 (I22.4 g / 10 min and density of 0.920 g / cm3) and LDPE-3 (I2 1.0 g / 10 min and density 0.920 g / cm3), all available from The Dow Chemical Company. The polyolefin polymer (A) can be prepared by any suitable process, many of which are well known in the art. Any conventional or hereafter discovered production process for producing polyolefin polymers can be employed to prepare (A). Typically, the production process comprises one or more polymerization reactions. The monocyclic organosiloxane constituent (B) of formula (I): a molecule containing a single-ring substructure composed of silicon and oxygen atoms arranged in an alternating arrangement; and unsaturated organic groups; and, optionally, H, saturated, or aromatic substituent groups; wherein there are at least two unsaturated organic groups and each of at least two silicon atoms in the ring substructure has at least one unsaturated organic group attached to it, and wherein, after taking into account the unsaturated organic groups and the oxygen atoms, any remaining valences of the silicon atoms are bonded to the H, saturated, or aromatic substituent groups; or a collection of such molecules. The constituent (B) may be a monocyclic organosiloxane composed of a 6-membered ring (n=3), an 8-membered ring (n=4), a 10-membered ring (n=5), or a 12-membered ring (n=6).The ring substructure is composed of units of formula (I): [R1, R2SiC>2 / 2]η (I), where the subscript n, R1, and R2 are as defined above. In each [R1, R2SiO2 / 2] unit, its R1 and R2 groups are bonded to its silicon atom. The units can be designated using conventional organosiloxane abbreviations, simply as Drer2, so that formula (I) becomes [0BA,κ2]η. R1 and R2 can be the same or, alternatively, different. In some aspects of the monocyclic organosiloxane (B) of formula (I), R1 is vinyl and R2 is ethyl and (B) is DV±'ELen where Vi is vinyl and Et is ethyl; alternatively, R1 is allyl and R2 is ethyl and (B) is alternatively R1 is butenyl (H2C=C (H) CH2CH2-) and R2 is ethyl and (B) is DButenyl'Et. In some aspects, R1 is vinyl and R2 is vinyl and (B) is Dvi'vi; alternatively R1 is allyl and R2 is allyl and (B) is püiyUAiiyn; alternatively R1 is butenyl (H2C=C (H) CH2CH2-) and R2 is butenyl and (B) is DButenyl'Butenyl. In some aspects, R1 is vinyl and R2 is phenyl and (B) is Dvi'phen where Ph is phenyl; Alternatively R1 is allyl and R2 is phenyl and (B) is alternatively R1 is butenyl (H2C=C (H) CH2CH2-) and R2 is phenyl and (B) is pButenii,ph_ When R2 is methyl (CH3) , the unit can be designated more simply as DR1 so that Formula (I) becomes [DR1]n.In some embodiments, R1 is vinyl and R2 is methyl and (B) is Dvi; alternatively, R1 is allyl and R2 is methyl and (B) is D*11^1; alternatively, R1 is butenyl (H2C=C (H) CH2CH2-) and R2 is methyl and (B) is DButenyl. In some embodiments, (B) is 2,4,6-trimethyl-2,4,6-trivinylcyclotrisiloxane, (Dvi)3 (CAS No. 3901-77-7); 2,4,6,8-tetramethyl-1-2,4,6,8-tetravinylcyclotetrasiloxane, (Dvi)4 (CAS No. 2554-06-5); or a combination thereof. In some aspects of the monocyclic organosiloxane (B) of formula (I), each R1 is independently H2C=C (Rla) -C (=O) O-(CH2)m, where Rla and the subscript m are as defined above. In some aspects, Rla is H; alternatively, Rla is methyl. In some aspects, the subscript m is 1, 2, or 3; alternatively, m is 2, 3, or 4; alternatively, m is 2 or 3; alternatively, m is 1; alternatively, m is 2; alternatively, m is 3; alternatively, m is 4. In some aspects, each R2 is independently alkyl (C1-C2) or alkenyl (C2-C3); alternatively, each R2 is independently alkyl (C1-C2); alternatively, each R2 is independently methyl. The amount of constituent (B) monocyclic organosiloxane of formula (I) in the crosslinkable polyolefin composition may be from 0.41 to 1.91% by weight, alternatively from 0.8 to 1.6% by weight, alternatively from 1.0 to 1.4% by weight, alternatively from 1.15 to 1.24% by weight; all based on the weight of the carrier mixture, alternatively the crosslinkable polyolefin composition. The amount of constituent (B) monocyclic organosiloxane of Formula (I) in the crosslinkable polyolefin composition may be greater in modes of the crosslinkable polyolefin composition that contain (F) a filler than in modes of the crosslinkable polyolefin composition that are free of (F) filler. Regarding the determination of the amount of constituent (B), the presence of crosslinking can be detected by an increase in torsion using a moving die rheometer (MDR). In some respects, the presence of crosslinking can be detected as a solvent extraction percentage (%Ext). %Ext = W1 / Wo*100%, where W1 is the weight after extraction, Wo is the original weight before extraction, / indicates division, and * indicates multiplication. The absence of, or a reduced level of, the carbon-carbon double bond of the unsaturated organic group (e.g., R1) of (B) in the crosslinked polyolefin product (due to coupling with the polyolefin polymer (A)) can be detected by nuclear magnetic resonance with carbon-13 or silicon-29 (13C-NMR and / or 29Si-NMR spectroscopy). Constituent (C) organic peroxide: a molecule containing carbon atoms, hydrogen atoms, and two or more oxygen atoms, and having at least one -O-O- group, provided that when there is more than one -O-O- group, each -O-O- group is indirectly linked to another -O-O- group through one or more carbon atoms, or a collection of such molecules. Organic peroxide (C) can be added to the crosslinkable polyolefin composition for curing comprising heating the crosslinkable polyolefin composition comprising constituents (A), (B), and (C) to a temperature equal to or higher than the decomposition temperature of organic peroxide (C). The (C) organic peroxide can be a monoperoxide of the Formula R°-OOR°, wherein each R° is independently an alkyl (C1-C20) group or an aryl (C6-C20) group. Each alkyl (C1-C20) group is independently either unsubstituted or substituted with 1 or 2 aryl (C6-C12) groups.Each aryl group (C6-C2o) is either unsubstituted or substituted with one to four alkyl groups (C1-C10). Alternatively, (C) may be a diperoxide of the formula R°-OOROOR°, where R is a divalent hydrocarbon group such as an alkylene (C2-C10), cycloalkylene (C3-C10), or phenylene, and each R° is as defined above. The organic peroxide (C) may be bis(1,1-dimethylethyl) peroxide; bis(1,1-dimethylpropyl) peroxide; 2,5-dimethyl-2,5-bis(1,1-dimethylethylperoxy)hexane; 2,5-dimethyl-2,5-bis(1,1-dimethylethylperoxy)hexyne; 4,4-bis(l,l-dimethylethylperoxy)valeric acid; butyl ester; l,l-bis(l,ldimethylperoxy)-3,3,5-trimethylcyclohexane; benzoyl peroxide; tere-butyl peroxybenzoate; di-tert-camyl peroxide (DTAP); bis(alpha-t-butylperoxyisopropyl)benzene (BIPB); isopropylcumyl t-butyl peroxide; t-butylcumyl peroxide; di-t-butyl peroxide; 2,5-bis(t-butylperoxy)-2,5-dimethylhexane; 2,5-bis(t-butylperoxy)-2,5-dimethylhexyne; 3,1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane; isopropylcumyl cumyl peroxide; 4,4-di(tert-butylperoxy)butyl valerate; or di(isopropylcumyl peroxide); or dicumyl peroxide. The (C) organic peroxide may be dicumyl peroxide. In some respects, only a mixture of two or more (C) organic peroxides is used, e.g. e.g., a 20:80 (w / w) mixture of tert-butyl-cumyl peroxide and bis(tert-butylperoxyisopropyl)benzene (e.g., LUPEROX D446B, which is commercially available from Arkema). In some respects, at least one, or alternatively each (C) organic peroxide contains a -O-O- group. The (O) organic peroxide may be 0.29 to 0.44 wt%, alternatively 0.30 to 39 wt%, alternatively 0.30 to 0.37 wt% of the carrier mixture, or alternatively of the crosslinkable polyolefin composition. The optional constituent (D) burn retardant: a molecule that inhibits premature curing or a collection of such molecules. Examples of a burn retardant are hindered phenols; semi-hindered phenols; TEMPO; TEMPO derivatives; 1,1-diphenylethylene; 2,4-diphenyl-4-methyl-l-pentene (also known as alpha-methylstyrene dimer or AMSD); and allyl-containing compounds described in US 6277925B1, column 2, line 62, to column 3, line 46. In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (D). When present, the (D) burn retardant may be 0.01 to 1.5 wt%, alternatively 0.05 to 1.2 wt%, or alternatively 0.1 to 1.0 wt% of the crosslinkable polyolefin composition. The optional antioxidant constituent (E): an organic molecule that inhibits oxidation or a collection of such molecules. The antioxidant (E) functions to provide antioxidant properties to the crosslinkable polyolefin composition and / or crosslinked polyolefin product. Examples of suitable (E) constituents are bis(4-(1-methyl-1-phenylethyl)phenyl)amine (e.g., NAUGARD 445); 2,2'-methylenebis(4-methyl-6-t-butylphenol) (e.g., VANOX MBPC); 2,2'thiobis(2-t-butyl-5-methylphenol (CAS No. 90-66-4; 4,4'thiobis(2-t-butyl-5-methylphenol) (also known as 4,4'thiobis(6-tert-butyl-m-cresol), CAS No. 96-69-5, commercially LOWINOX TBM-6); 2,2'-thiobis (6-t-butyl-4methylphenol (CAS No. 90-66-4, commercially LOWINOX TBP-6); tris[(4-tert-butyl-3-hydroxy-2,6-dimethylphenyl)methyl]-1,3,5triazine-2,4,6-trione (e.g., CYANOX 1790); tetrakis(3-(3,5bis(1,1-dimethylethyl)-4-hydroxyphenyl)propionate pentaerythritol (e.g., IRGANOX 1010, no.CAS 6683-19-8); 2,2'-thiodiethanediyl ester of 3,5-bis(1,1-dimethylethyl)4-hydroxybenzenepropanoic acid (e.g., IRGANOX 1035, CAS no. MA / a / ZUZZ / UU l JUZ 41484-35-9); distearyl thiodipropionate (DSTDP); dilauryl thiodipropionate (eg, IRGANOX PS 800); Stearyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate (eg, IRGANOX 1076); 2,4-bis(dodecylthiomethyl)6-methylphenol (IRGANOX 1726); 4,6-bis(octylthiomethyl)-o-cresol (eg IRGANOX 1520); and 2',3-bis[[3-[3,5-di-tert-butyl-4hydroxyphenyl]propionyl]] propionohydrazide (IRGANOX 1024). In some respects, (E) is 4,4'-thiobis(2-t-butyl-5-methylphenol) (also known as 4,4'-thiobis(6-tert-butyl-m-cresol); 2,2'-thiobis(6-t-butyl-4-methylphenol; tris[(4-tert-butyl-3-hydroxy-2,β-dimethylphenyl)methyl]-1,3,5-triazine-2,4,6-trione; distearyl thiodipropionate; or dilauryl thiodipropionate; or a combination of any two or more of these. The combination may be tris[(4-tert-butyl-3-hydroxy-2,6-dimethylphenyl)methyl]-1,3,5-triazine-2,4,6-trione and distearyl thiodipropionate.In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (E). When present, the antioxidant (E) may be 0.01 to 1.5% by weight, alternatively 0.05 to 1.2% by weight, or alternatively 0.1 to 1.0% by weight of the crosslinkable polyolefin composition. The optional constituent (F) filler: a finely divided particulate solid or gel that occupies space in, and optionally affects the function of, a host material. ML / a / ZUZZ / UU l JUZ (F) filler may be a calcined clay, organoclay, or hydrophobicized fumed silica such as those commercially available under the trade name CAB-O-SIL from Cabot Corporation. The (F) filler may have flame-retardant effects. In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (F). When present, the (F) filler may be 1 to 40% by weight, alternatively 2 to 30% by weight, or alternatively 5 to 20% by weight of the crosslinkable polyolefin composition. With respect to (F) filler, in some aspects the crosslinkable polyolefin composition does not contain 20% by weight or more of, alternatively does not contain 15% by weight or more of, alternatively does not contain 10% by weight or more of, or alternatively is free from an inorganic filler selected from the group consisting of aluminum oxide, aluminum silicate, calcium silicate, magnesium silicate, silica, titanium dioxide, and mixtures thereof. In some aspects the crosslinkable polyolefin composition does not contain 20% by weight or more of, alternatively does not contain 15% by weight or more of, alternatively does not contain 10% by weight or more of, or alternatively is free from any inorganic filler selected from the group consisting of: solids containing Al, solids containing Ca, solids containing Mg, solids containing Si, solids containing Ti, and mixtures thereof. ινΐΛ / a / zuzz / uu i In some aspects, the crosslinkable polyolefin composition is free of a silsesquioxane, or alternatively, any siloxane except constituent (B). In some aspects, the crosslinkable polyolefin composition is free of a silsesquioxane and any of the inorganic filler groups mentioned above. For the avoidance of doubt, the term inorganic filler does not include carbon black. The optional flame retardant constituent (G): a molecule or substance that inhibits combustion, or a collection of such molecules. The (G) may be a halogenated compound or halogen-free. Examples of halogenated flame retardants (G) include organochlorides and organobromides. Examples of organochlorides are chlorenedic acid derivatives and chlorinated paraffins. Examples of organobromides include decabromodiphenyl ether, decabromodiphenyl ethane, brominated polymeric compounds such as brominated polystyrenes, brominated carbonate oligomers, brominated epoxy oligomers, tetrabromophthalic anhydride, tetrabromobisphenol A, and hexabromocyclododecane. Typically, halogenated flame retardants (G) are used in conjunction with a synergist to enhance their effectiveness. The synergist can be antimony trioxide.Examples of (G) halogen-free flame retardants include inorganic minerals, organic nitrogen intumescent compounds, and phosphorus-based intumescent compounds. Examples of inorganic minerals include aluminum hydroxide and magnesium hydroxide. Examples of phosphorus-based intumescent compounds include organic phosphonic acids, phosphonates, phosphines, phosphinites, phosphine oxides, phosphines, phosphites, phosphates, phosphonitrile chloride, phosphorus ester amides, phosphoric acid amides, phosphonic acid amides, melamine and melamine derivatives thereof, including melamine polyphosphate, melamine pyrophosphate, and melamine cyanurate, and mixtures of two or more of these materials.Examples include phenylbisdodecyl phosphate, phenylbisneopentyl phosphate, phenylethylene hydrogen phosphate, phenyl-bis-3,5,5' trimethylhexyl phosphate, ethyldiphenyl phosphate, 2-ethylhexyl di(p-tolyl) phosphate, diphenyl hydrogen phosphate, bis(2-ethylhexyl) paratolyl phosphate, tritolyl phosphate, bis(2-ethylhexyl)phenyl phosphate, tri(nonylphenyl) phosphate, phenylmethyl hydrogen phosphate, p-tolyl di(dodecyl) phosphate, tricresyl phosphate, triphenyl phosphate, triphenyl phosphate, dibutylphenyl phosphate, 2-chloroethyldiphenyl phosphate, p-tolyl bis(2,5,5' trimethylhexyl) phosphate, 2-ethylhexyldiphenyl phosphate, and diphenyl hydrogen phosphate. Phosphoric acid esters of the type described in U.S. Patent No. 6,404,971 are examples of phosphorus-based flame retardants.Additional examples include liquid phosphates such as bisphenol A diphosphate (BAPP) (Adeka Palmarole) and / or resorcinol bis(diphenyl phosphate) (Fyroflex RDP) (Supuesta, ICI), solid phosphorus such as ammonium polyphosphate (APP), piperazine pyrophosphate, and piperazine polyphosphate. Ammonium polyphosphate is frequently used with flame retardant co-additives, such as melamine derivatives. Melafina (DSM) (2,4,6-triamino-1,3,5-triazine; finely ground melamine) is also useful. In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (G). When present, (G) may be in a concentration of 0.01 to 70% by weight, alternatively 0.05 to 40% by weight, alternatively 1 to 20% by weight of the crosslinkable polyolefin composition. The optional constituent (H) hindered amine stabilizer: a molecule containing a basic nitrogen atom bonded to at least one spherically bulky organic group and functioning as an inhibitor of degradation or decomposition, or a collection of such molecules. (H) is a compound having a spherically hindered amino functional group and inhibits oxidative degradation and may also increase the shelf life of crosslinkable polyolefin compositions containing (C) organic peroxide. Suitable examples of (H) include butanedioic acid dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-l-piperidine-ethanol (CAS No. 65447-77-0, commercially LOWILITE 62); and N,N'-bisformyl-N,N'bis(2,2,6,6-tetramethyl-4-piperidinyl)-hexamethylenediamine (CAS No. 124172-53-8, commercially Uvinul 4050 H). In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (H).When present, the (H) hindered amine stabilizer may be 0.001 to 1.5 wt%, alternatively 0.002 to 1.2 wt%, alternatively 0.002 to 1.0 wt%, alternatively 0.005 to 0.5 wt%, alternatively 0.01 to 0.2 wt%, alternatively 0.05 to 0.1 wt% of the crosslinkable polyolefin composition. Optional constituent (I) tree retarder: a molecule that inhibits aqueous and / or electrical treeing, or a collection of such molecules. The tree retarder may be an aqueous tree retarder or an electrical tree retarder. An aqueous tree retarder is a compound that inhibits aqueous treeing, a process by which polyolefins degrade when exposed to the combined effects of an electric field and moisture. An electrical tree retarder, also called a voltage stabilizer, is a compound that inhibits electrical treeing, an electrical process preceding breakdown in solid electrical insulation due to partial electrical discharges. Electrical treeing can occur in the absence of water.Aqueous treeing and electrical treeing are problems for electrical cables containing a sheathed conductor where the sheathing contains a polyolefin. The (I) may be a poly(ethylene glycol) (PEG). In some aspects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (I). When present, the tree retardant (I) may be 0.01 to 1.5 wt%, alternatively 0.05 to 1.2 wt%, or alternatively 0.1 to 1.0 wt% of the crosslinkable polyolefin composition. The optional constituent (J) methyl radical scavenger: a molecule that is reactive with methyl radicals or a collection of such molecules. (J) reacts with methyl radicals in the crosslinkable polyolefin composition or crosslinked polyolefin product. (J) may be a TEMPO derivative of 2,2,6,6-tetramethyl-l-piperidinyl-N-oxyl or a 1,1-diarylethylene. Examples of TEMPO derivatives are 4-acryloxy-2,2,6,6-tetramethyl-l-piperidinyl-N-oxyl (CAS No. 21270-85-9, acrylate TEMPO), 4-allyloxy-2,2,6,6-tetramethyl-l-piperidinyl-N-oxyl (CAS No. 217496-13-4, allyl TEMPO); bis(2,2,6,6-tetramethyl-l-piperidinyl-N-oxyl) sebacate (CAS No. 2516-92-9, bis TEMPO)); N,N-bis(acryloyl-4-amino)2,2,6,6-tetramethyl-l-piperidinyl-N-oxyl (CAS No. 1692896-3243 4, diacrylamide TEMPO); and N-acryloyl-4-amino-2,2,6,6-tetramethyl-l-piperidinyl-N-oxyl (CAS No. 21270-88-2, monoacrylamide TEMPO). Examples of 1,1-diarylethylenes are 1,1-diphenylethylene and alpha-methylstyrene. In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (J). When present, the (J) methyl radical scavenger can be 0.01 to 1.5 wt%, alternatively 0.05 to 1.2 wt%, or alternatively 0.1 to 1.0 wt% of the crosslinkable polyolefin composition. The optional constituent (K) conventional co-agent: a molecule containing a main chain or ring substructure and one, alternatively two or more propenyl, acrylate and / or vinyl groups attached thereto, wherein the substructure is composed of carbon atoms and optionally nitrogen atoms or a collection of such molecules. The (K) conventional co-agent is free of silicon atoms. The (K) conventional co-agent may be a conventional co-agent with propenyl functionality as described by any of the limitations (i) to (v): (i) (K) is 2-allylphenyl allyl ether; 4-isopropenyl-2,6-dimethylphenyl allyl ether; 2,6-dimethyl-4-allylphenyl allyl ether; 2-methoxy-4-allylphenyl allyl ether; 2,2'-diallyl bisphenol A; O,O'-diallyl bisphenol A; or tetramethyl diallylbisphenol A; (ii) (K) is 2,4-diphenyl-4-methyl-l-pentene or 1,3-diisopropenylbenzene; (iii) (K) is isocyanurate MA / a / ZUZZ / UU l JUZ trialyl (TAIC); trialyl cyanurate (TAC); trialyl trimylate (TATM); N,N,N',N',N,Nhexaally1-1,3,5-triazine-2,4,6-triamine (HATATA; also known as N2,N2,N4,N4,N6,N6-hexaallyl1,3,5-triazine-2,4,6-triamine); trialyl orthoformate; pentaerythritol trialyl ether; trialyl citrate; or trialyl aconitate; (iv) (K) is a mixture of any two of the propenyl functional co-agents in (i).Alternatively, (K) may be a conventional co-agent with acrylate functionality selected from trimethylolpropane triacrylate (TMPTA), trimethylolpropane trimethylacrylate (TMPTMA), bisphenol A ethoxylated dimethacrylate, 1,6-hexanediol diacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, and glyceryl propoxylated triacrylate. Alternatively, (K) may be a conventional co-agent with vinyl functionality selected from polybutadiene having at least 50 wt% 1,2-vinyl content and trivinyl cyclohexane (TVCH). Alternatively, (K) may be a conventional co-agent described in US 5,346,961 or US 4,018,852. Alternatively, (K) may be a combination or any two or more of the above conventional co-agents.In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (K). When present, the conventional (K) co-agent may be 0.01 to 4.5 wt%, alternatively 0.05 to 2 wt%, alternatively 0.1 to 1 wt%, or alternatively 0.2 to 0.5 wt% of the crosslinkable polyolefin composition. The optional constituent (L) nucleating agent: an organic or inorganic additive that enhances the crystallization rate of a polyolefin polymer. Examples of (L) include calcium carbonate, titanium dioxide, barium sulfate, ultra-high molecular weight polyethylene, potassium hydrogen phthalate, benzoic acid compounds, sodium benzoate compounds, disodium bicyclo[2.2.1]heptane-2,3-dicarboxylate, zinc monoglycerol, and 1,2-cyclohexanecarboxylic acid, calcium:zinc stearate salt. In some aspects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (L). When present, (L) may be at a concentration of 0.01 to 1.5 wt%, alternatively 0.05 to 1.2 wt%, or alternatively 0.1 to 1.0 wt% of the crosslinkable polyolefin composition. The optional constituent (M) carbon black: a finely divided form of paracrystalline carbon that has a high surface area-to-volume ratio, but lower than that of activated carbon. Examples of (M) include furnace carbon black, acetylene carbon black, and conductive carbons (e.g., carbon fibers, carbon nanotubes, graphene, graphite, and expanded graphite platelets). In some respects, the crosslinkable polyolefin composition and the crosslinked polyolefin product are free of (M). When present, (M) can be at a concentration of 0.01 to 40 wt%, alternatively 0.05 to 35 wt%, alternatively 0.1 to 20 wt%, alternatively 0.5 to 10 wt%, or alternatively 1 to 5 wt%, of the crosslinkable polyolefin composition. In addition, the crosslinkable polyolefin composition may independently comprise one or more of a number of other optional additives selected from a carrier resin, lubricant, processing aid, slip agent, plasticizer, surfactant, extender oil, acid scrubber, and metal deactivator. The above constituents of the crosslinkable polyolefin composition are not believed to function as ring-opening catalysts for the cyclic siloxanes therein. However, if one or more of the above constituents of the crosslinkable polyolefin composition are unexpectedly found to function as ring-opening catalyst(s) for cyclic siloxanes, the constituent(s) would be excluded from the crosslinkable polyolefin composition. The crosslinked polyolefin product: a reaction product containing networked polyolefin resins with C-C linkages formed during the curing (crosslinking) of the crosslinkable polyolefin composition. The networked polyolefin resins may comprise reaction products of coupling (A) polyolefin polymer macromolecules with (B) monocyclic organosiloxane molecules of formula (I) to give a network structure containing a multivalent monocyclic organosiloxane crosslinking group attached to two or more (A) polyolefin polymer macromolecules through a reaction of the two or more (A) polyolefin polymer macromolecules with one or more R1 groups of the (B) monocyclic organosiloxane molecule of formula (I). In some respects, two (A) macromolecules may be added through the same carbon-carbon double bond of one R1.For example, when two or more R1s are vinyl and zero, one, or more R2s are vinyl, the network structure of the crosslinked polyolefin product may contain two or more multivalent monocyclic organosiloxane crosslinking groups of formula (II): [CH2CH2(R2)SiO2 / 2](II) and / or formula (III) [CH3C(-)(H),(R2)SiO2 / 2](III) and n-2 or fewer (e.g., n-3) unreacted units, if any, of formula (I), wherein the subscript n is as defined for formula (I) and each indicates a valency of a multivalent group. When each R2 is independently. H, alkyl (C1-C4), or phenyl in formula (I), each R2 in formulas (II) and (III) is independently H, alkyl (C1-C4) or phenyl. The crosslinked polyolefin product may also contain curing byproducts such as alcohol and ketone byproducts from the reaction of (C) organic peroxide. When the crosslinkable polyolefin composition further contains one or more of any optional additive or constituent, such as (E) antioxidant, the crosslinked polyolefin product may also contain any one or more of the optional additives or constituents such as (E) or one or more reaction products formed from these during the curing of the crosslinkable polyolefin composition. The crosslinked polyolefin product may be in a divided solid form or in a continuous form. The divided solid form may comprise pellets, granules, powder, or a combination of any two or more of these. The continuous form may be a molded part (e.g., an injection-molded part) or an extruded part (e.g., a conductor or a sheathed cable). The crosslinked polyolefin product may be free of a ring-opening catalyst and / or siloxane polymer molecules (silicones, prepared by ring-opening polymerization of (B)). The sheathed conductor. The sheathed conductor may be an insulated electrical conductor. The insulated electrical conductor may be a metal wire or a sheathed electrical cable, including a power cable for use in low-voltage (LV, >0 to <5 kilovolts (kV)), medium-voltage (MV, 5 to <69 kV), high-voltage (HV, 69 to 230 kV), or extra-high-voltage (EHV, >230 kV) electricity transmission and distribution and data transmission applications. A wire means a single strand or filament of conductive material, e.g., conductive metal such as copper or aluminum. A cable and a power cable are synonymous and mean an insulated electrical conductor comprising at least one wire arranged within a covering that may be called a sheath, jacket (protective outer sheath), or coating. The insulated electrical conductor may be designed and constructed for use in medium-, high-, or extra-high-voltage applications.Examples of suitable cable designs are shown in US 5,246,783; US 6,496,629; and US 6,714,707. The insulated electrical conductor may contain a conducting / transmitting core and an outer single-layer or multi-layered sheath arranged around it to protect and insulate the conducting / transmitting core from external environments. The conducting / transmitting core may be composed of one or more metallic wires. When the conducting / transmitting core contains two or more metallic wires, the metallic wires may be subdivided into separate wire bundles. Each wire in the conducting / transmitting core, whether bundled or not, may be individually coated with a layer of insulation, and / or the separate bundles may be coated with a layer of insulation. The single-layer or multi-layered sheath (e.g.,A single-layer or multi-layer coating or sheath primarily serves to protect or isolate the conductive / transmitting core from external environments such as sunlight, water, heat, oxygen, other conductive materials (e.g., to prevent short circuits) and / or other corrosive materials (e.g., chemical fumes). The single-layer or multi-layer sheath of an insulated electrical conductor can be configured differently depending on its intended use. For example, in cross-section, the multi-layer sheath of the insulated electrical conductor can be configured sequentially from its innermost to its outermost layer with the following components: an inner semiconducting layer, a cross-linked polyolefin insulation layer comprising the cross-linked polyolefin product (cross-linked product of the invention), an outer semiconducting layer, a metallic shield, and a protective wrap. The layers and the wrap are continuous circumferentially and coaxially (longitudinally). The metallic shield (ground) is continuous coaxially and either continuous (a single layer) or discontinuous (tape or wire) circumferentially.Depending on the intended application, the multilayer coating for insulated optical fiber may omit the semiconductor layers and / or the metallic shielding. The outer semiconductor layer, when present, may consist of a peroxide-crosslinked semiconductor product that is bonded to or peelable from the crosslinked polyolefin layer. In some respects, it is a method for manufacturing coated conductors. The method comprises extruding a coating comprising a layer of crosslinkable polyolefin composition onto a conductor / transmitter core to form a coated core, and passing the coated core through a continuous vulcanization (CV) apparatus configured with CV conditions suitable for curing the crosslinkable polyolefin composition to obtain the coated conductor. CV conditions include temperature, atmosphere (e.g., nitrogen gas), and line speed or passage time through the CV apparatus. Suitable CV conditions can produce a coated conductor exiting the CV apparatus, where the coated conductor contains a crosslinked polyolefin layer formed by curing the crosslinked polyolefin layer. The method for conducting electricity. The method of the invention for conducting electricity may use the coated conductor of the invention comprising the insulated electrical conductor modality. A method for transmitting data using the coated conductor of the invention comprising the insulated electrical conductor is also contemplated. Density is measured in accordance with ASTM D792-13, Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement, Method B (for testing solid plastics in liquids other than water, e.g., in liquid 2-propanol). Results are reported in units of grams per cubic centimeter (g / cm³ or g / cc). Hot Creep (Hot Deformation) Test Method: A test specimen (dog bone shape of dimensions specified in ASTM 638-34; thickness <2 millimeters (mm); marker lines spaced 20 mm apart) is placed in an oven at 200°C, and a weight equal to a force of 20 Newtons per square centimeter (N / cm²) is attached to the test specimen. The elongation of the test specimen (distance between marker lines) under these conditions is then measured and expressed as a percentage of the initial 20 mm distance. If the distance between marker lines is extended to 40 mm, the hot creep is 100% (100 * (40-20) / 20) = 100%). At 100 mm, the hot creep is 400%. All other things being equal, the lower the level of crosslinking in the test specimen, the greater the extent of elongation. Conversely, the higher the level of crosslinking in the test sample, the smaller the extent of its elongation.If the level of crosslinking in the test sample is sufficiently low, the sample may fail by breaking, which can occur within a few minutes or even seconds of the start of the test. If the test sample is intact after 15 minutes, the weight is removed, the sample is taken out of the oven, and allowed to cool to room temperature. The residual elongation of the test sample is measured after cooling. The melt flow index (I2) is measured according to ASTM D123804 (190 °C, 2.16 kg), Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Platometer, using conditions of 190 °C / 2.16 kilograms (kg), formerly known as Condition E and also referred to as I2. Results are reported in units of grams eluted per 10 minutes (g / 10 min) or the equivalent in decigrams per 1.0 minute (dg / 1 min). 10.0 dg = 1.00 g. Moving Die Rheometer (MDR) Test Method: ASTM D5289-12, Standard Test Method for Rubber Property—Vulcanization Using Rotorless Cure Meters. The torsion of a test specimen is measured using the following procedure. The test specimen is heated in a Moving Die Rheometer (MDR) Instrument MDR2000 (Alpha Technologies) at 182°C for 12 minutes while monitoring the change in torsion for oscillatory arc deformation of 0.5 degrees at 100 cpm. The lowest measured torsion value is designated ML, expressed in deciNewton-meters (dN-m). As curing or cross-linking progresses, the measured torsion value increases, ultimately reaching a maximum torsion value. At 12 minutes, the maximum or highest measured torsion value is designated MH, expressed in dN-m. With all other conditions being equal, the higher the MH torsion value, the greater the extent of cross-linking. The following data predict how the crosslinkable polyolefin compositions of the invention and the crosslinked polyolefin products of the invention would perform when extruded and crosslinked (e.g., in a CV apparatus) to form an insulation layer of a cable. Examples (Al)-l ethylene / l-octene copolymer elastomer having a melting index of 1 g / 10 min and a density of 0.870 g / cm3. (Al)-2 ethylene / l-octene copolymer elastomer having a melt index of 5 g / 10 min and a density of 0.870 g / cm3. LDPE-1: LDPE that has a melting index of 1.9 g / 10 min and a density of 0.9183 g / cm3. Monocyclic organosiloxane (Bl): 2,4,6,8-tetramethyl2,4,6,8-tetravinylcyclotetrasiloxane, (Dvi)4(CAS No. 255455 06-5) obtained from The Dow Chemical Company. Organic peroxide (Cl): dicumyl peroxide (DCP) obtained from Fangruide. Anti-burn agent (DI): alpha-methylstyrene dimer (AMSD). Antioxidant (El): 4,6-bis(octylthiomethyl)-2-methylphenol. Examples of the invention 1 to 6 (IE1 to IE6): In separate embodiments, monocyclic organosiloxane (Bl), organic peroxide (Cl), anti-burn agent (Di), and antioxidant (El) are soaked in granules of ethylene / l-octene copolymer elastomer (Al)1 or (Al)-2, or in combination with ethylene / l-octene copolymer elastomer (Al)-ly LDPE-1, at 80 °C for 6 hours in an oven to give the compositions of the invention IE1 to IE6 in granule form. The compositions and hot creep performance are shown in Tables 1 and 2, respectively. Comparative Examples 1 to 5 (CE1 to CE5): In separate executions, monocyclic organosiloxane (Bl), organic peroxide (Cl), anti-burn agent (Di), and antioxidant (El) are soaked in granules of ethylene / l-octene (Al)-l(Al)-2 copolymer elastomer and / or LDPE-1 at 80 °C for 6 hours in an oven to give comparative compositions CE1 to CE6 in granule form. The compositions and hot creep performance are shown in Tables 3 and 4, respectively. Table 1: Compositions from IE1 to IE6. (0=0.00) Constituent (parts by weight) IE1 IE2 IE3 IE4 IE5 IE6 Ethylene / 1-octene elastomer (A1)-1 98.29 98.23 0 24.56 49.12 73.67 Ethylene / 1-octene elastomer (A1)-2 0 0 98.23 0 0 0 LDPE-1 0 0 0 73.67 49.12 24.56 (B1) = (DVi)4 1.20 1.20 1.20 1.20 1.20 1.20 Dicumyl peroxide (C1) 0.30 0.36 0.36 0.36 0.36 0.36 AMSD (D1) 0.06 0.06 0.06 0.06 0.06 0.06 Antioxidant (E1) 0.15 0.15 0.15 0.15 0.15 0.15 Total 100 100 100 100 100 100 The data in Table 1 indicate that the crosslinkable polyolefin compositions IE1 to IE6 are examples of the crosslinkable polyolefin composition of the invention. Table 2: Hot creep characterizations of IE1 to IE6. Constituent (parts by weight) IE1 IE2 IE3 IE4 IE5 IE6 MDR MH at 182 °C for 12 min (dN-m) 3.2 5.0 2.8 2.1 2.7 3.8 Hot creep at 200 °C for 15 minutes (%) 24 26 86 144 81 44 As indicated by the data in Table 2, all crosslinkable polyolefin compositions of the invention from IE1 to IE6 had hot creep at 200 °C after being held for 15 minutes of less than 175% of the maximum described value. Surprisingly, five of the six crosslinkable polyolefin compositions of the invention (i.e., IE1 to IE3, IE5, and IE6) had hot creep values ​​less than 100%. The MDR MH data in Table 2 indicate that after being held at 182 °C in a moving-die rheometer for 12 minutes, all crosslinkable polyolefin compositions of the invention generated crosslinked polyolefin products having significant crosslinking ranges as indicated by an MH greater than (>) 2.0 dN-m, alternatively >2.5 dN-m, alternatively >3.0 dN-m. These values ​​are remarkable achievements in just 12 minutes. Table 3: Compositions of CE1 to CE5. (0=0.00) Constituent (parts by weight) CE1 CE2 CE3 CE4 CE5 Ethylene / 1-octene elastomer (A1)-1 0 98.39 0 14.73 0 Ethylene / 1-octene elastomer (A1)-2 0 0 98.39 98.29 LDPE-1 98.23 0 0 83.50 0 (B1) = (DVi)4 1.20 1.20 1.20 1.20 1.20 Dicumyl peroxide (C1) 0.36 0.20 0.20 0.36 0.30 AMSD (D1) 0.06 0.06 0.06 0.06 0.06 Antioxidant (E1) 0.15 0.15 0.15 0.15 0.15 Total 100 100 100 100 100 The data in Table 3 indicate that the comparative crosslinkable polyolefin compositions CE1 to CE5 are not examples of the crosslinkable polyolefin composition of the invention. Table 4: Hot creep characterizations of CE1 to CE5. Constituent (parts by weight) CE1 CE2 CE3 CE4 CE5 MDR MH at 182 °C for 12 min (dN-m) 1.4 2.9 1.2 1.7 2.0 Hot creep at 200 °C for 15 min (%) 213 Failure Failure Failure Failure As indicated by the data in Table 4, all comparative crosslinkable polyolefin compositions CE1 to CE5 had a hot creep at 200 °C after being held for 15 minutes significantly greater than 175% of the maximum description. Surprisingly, four of the five comparative crosslinkable polyolefin compositions (i.e., CE2 to CE5) experienced sample failure (indicated as Failure) in the hot creep test, meaning that the test specimens either broke or stretched to the bottom of the oven during the test, rendering a hot creep value unobtainable. The MDR MH data in Table 4 indicate that after being held at 182 °C in a moving die rheometer for 12 minutes, all but one comparator crosslinkable polyolefin composition failed to produce crosslinked polyolefin products having a significant crosslinking range (i.e., they failed to achieve MH >2.0 dN-m). Only CE2 had MH >2.0 dN-m (i.e., 2.9 dNm). It is hereby stated that, as of this date, the best method known to the applicant for putting the aforementioned invention into practice is the one that is clear from the present description of the invention.

Claims

CLAIMS Having described the invention as above, the following claims are claimed as property:

1. A crosslinkable polyolefin composition characterized in that it comprises from 100 to 30 percent by weight (wt. %) of a carrier mixture and from 0 to 70 wt. £100 to 70 wt. £100, respectively, of one or more optional additives; wherein the carrier mixture consists of from 97.56 to 99.31 wt. £100 of (A) a polyethylene polymer, from 0.40 to 2.0 wt. of a monocyclic organosiloxane with alkenyl functionality, and from 0.29 to 0.44 wt. £100 of (C) an organic peroxide; wherein the (A) polyethylene polymer is selected from (A1) and (A2): (A1) an ethylene / alpha-olefin copolymer elastomer having a melt index of 0.6 to 6.2 grams per 10 minutes (g / 10 min) and a density of 0.854 to 0.912 grams per cubic centimeter (g / cm3), measured in accordance with ASTM D792-13, Method B or (A2) a mixture of (Al) and a low-density polyethylene (LDPE) having a melt index of 0.8 to 2.5 g / 10 min, wherein the mixture has a mass weight ratio of (Al) to the weight of (LDPE) ((Al) / (LDPE) w / w) of 99.9 / 0.1 to 1.0 / 3.0 and wherein both melt indices are measured in accordance with ASTM D1238-04 (190 °C, 2.16 kg; i2); wherein the (B) monocyclic organosiloxane with alkenyl functionality is of formula (I): [R1, R2SiO2 / 2]n(I), wherein the subscript n is an integer greater than or equal to 3; each R1 is independently an (C2-C4) alkenyl or an H2C=C(Rla)-C(=O)-O-(CH2)m- wherein Rla is H or methyl and the subscript m is an integer from 1 to 4; and each R2 is independently H, (C1-C4) alkyl, phenyl, or R1; and wherein the carrier mixture of the crosslinkable polyolefin composition has a hot creep of less than 175% after being held at 200°C for 15 minutes, as measured by the hot creep test method; provided that the crosslinkable polyolefin composition is free of a phosphazene base; and provided that if the melt index (I2) of the (Al) ethylene / alpha-olefin copolymer elastomer is greater than 2 g / 10 min, the amount of (C) organic peroxide is 0.35 to 0.44% by weight.

2. The crosslinkable polyolefin composition according to claim 1, characterized in that the (A) polyethylene polymer is further defined by any of the limitations (i) to (vii): (i) the (A) polyethylene polymer is the (A1) ethylene / alpha-olefin copolymer elastomer; (ii) the (A) polyethylene polymer is the (A1) ethylene / alpha-olefin copolymer elastomer and (A1) is an ethylene / 1-octene copolymer having a melt index of 0.80 to 5.4 g / 10 min and a density of 0.855 to 0.912 g / cm3; (iii) the (A) polyethylene polymer is the (Al) ethylene / alpha-olefin copolymer elastomer and (Al) is an ethylene / l-butene copolymer having a melt index of 0.80 to 5.4 g / 10 min and a density of 0.859 to 0.890 g / cm3; (iv) the (A) polyethylene polymer is the (A2) mixture and (A2) is a mixture of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is an LDPE having a melt index (I2) of 1.75 to 2.49 g / 10 min and a density of 0.918 to 0.920 g / cm3; (v) the (A) polyethylene polymer is the (A2) mixture and (A2) is a mixture of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is an LDPE having a melt index (I2) of 2.4 g / 10 min and a density of 0.920 g / cm3; (vi) the (A) polyethylene polymer is the (A2) mixture and (A2) is a mixture of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is an LDPE having a melt index (I2) of 1.9 g / 10 min and a density of 0.9183 g / cm3; and (vii) the (A) polyethylene polymer is the (A2) mixture and (A2) is a mixture of the ethylene / alpha-olefin copolymer elastomer of any of the limitations (i) to (iii) and the LDPE is a LOPE having a melt index (I2) of 0.80 to 1.24 g / 10 min and a density of 0.917 to 0.923 g / cm3.

3. The crosslinkable polyolefin composition according to claim 1 or 2, characterized in that the subscript n is 4 and the (B) monocyclic organosiloxane of formula (I) is described by any one of the limitations (i) to (x): (i) each R1 is independently a (C2-C3) alkenyl; and each R2 is independently H, (C1-C2) alkyl, or (C2-C3) alkenyl; (ii) each R1 is vinyl; and each R2 is independently (C1-C2) alkyl; (iii) each R1 is vinyl; and each R2 is methyl; (iv) each R1 is allyl; and each R2 is independently (C1-C2) alkyl; (v) each R1 is allyl; and each R2 is methyl; (vi) each R1 is independently H2C=C (Rla)-C (=0)-0(CH2)m_ θη where Rla is H or methyl and the subscript m is an integer from 1 to 4; and each R2 is independently H, alkyl (C1-C2) , or alkenyl (C2-C3) ; (vil) each R1 is independently H2C=C (Rla) -C (=0) O-(CH2)m- where Rla is H and the subscript m is 3; and each R2 is independently alkyl (C1-C2) ;(viii) each R1 is independently H2C=C (Rla) -C (=0) O-(CH2)m_ where Rla is methyl and the subscript m is 3; and each R2 is independently (C1-C2) alkyl; (ix) the crosslinkable polyolefin composition does not contain 24 wt% or more of any inorganic filler; and (x) a combination of limitation (ix) and any of limitations (i) to (viii).; 4. The crosslinkable polyolefin composition according to any of claims 1 to 3, characterized in that it further comprises 0.01 to 0.10 wt% of (D) an anti-burning agent or 0.10 to 0.30 wt% of (E) an antioxidant or a combination of (D) and (E); and wherein an embodiment of the crosslinkable polyolefin composition consisting of constituents (A) to (E) has a hot creep of less than 175% after being held at 200 °C for 15 minutes, as measured by the Hot Creep Test Method.

5. The crosslinkable polyolefin composition according to any of claims 1 to 4, characterized in that it comprises the carrier mixture and one or more additives; wherein the one or more additives are selected from the group consisting of additives (F) to (M): (F) a filler; (G) a flame retardant; (H) a hindered amine stabilizer; (I) a tree retarder; (J) a methyl radical scavenger; (K) a conventional co-agent; (L) a nucleating agent; and (M) carbon black; provided that the (F) filler does not include any previously omitted filler.

6. A method for preparing the crosslinkable polyolefin composition according to claim 1, characterized in that it comprises mixing the amount of (A) polyethylene polymer; the amount of (B) monocyclic organosiloxane of formula (I), and the amount of (C) organic peroxide together to prepare the carrier mixture.

7. A method of free-radical curing of the crosslinkable polyolefin composition according to any of claims 1 to 5, for producing a crosslinked polyolefin product, characterized in that it comprises heating the crosslinkable polyolefin composition to an effective curing temperature such that the (A) polyethylene polymer reacts with the (B) monocyclic organosiloxane of formula (I), thereby producing a crosslinked polyolefin product.

8. A crosslinked polyolefin product characterized in that it is manufactured by the curing method according to claim 7.

9. A manufactured article characterized in that it comprises a molded shape of the crosslinkable polyolefin composition according to any of claims 1 to 5 or the crosslinked polyolefin product according to claim 8.

10. A coated conductor characterized in that it comprises a conducting core and an insulating layer that at least partially covers the conducting core, wherein at least a portion of the insulating layer comprises the crosslinkable polyolefin composition according to any of claims 1 to 5 or the crosslinked polyolefin product according to claim 8.

11. A method for transmitting electricity, characterized in that it comprises applying a voltage along the conductive core of the coated conductor according to claim 10 to generate a flow of electricity through the conductive core.