Silane crosslinkable polyethylene

Details Silane crosslinkable polyethylene Silane crosslinkable polyethylene

C - Chemistry, Metallurgy

08

F

C08F 255/02 (2006.01) C08F 255/00 (2006.01) C08L 51/06 (2006.01) H01B 3/44 (2006.01)

Patent

CA 2488983

Crosslinkable or crosslinked polymer compositions are provided, the compositions including a copolymer of ethylene and C3 to C12 alpha-olefin comonomer, the copolymer having a CDBI of at least 70%, a melt index 12.16 of from 0.1 to 15 g/10 min, a density of from 0.910 to 0.940 g/cm3, a melt index ratio 121.6/12.16 of from 30 to 80, and an Mw/Mn ratio of from 2.5 to 5.5; and a silane grafting composition including a silane compound and a free radical initiator; or reaction products thereof. The crosslinkable or crosslinked compositions are particularly suitable for electrical applications, such as in insulating, semiconducting or jacketing layers of power cables, telecommunications cables, and combined power/telecommunications cables.

L'invention concerne des compositions réticulables ou réticulées qui renferment un copolymère d'éthylène et un comonomère C¿3? à C¿12? alpha-oléfine, le copolymère ayant un CDBI d'au moins 70 %, un indice de fusion I¿2,16? de 0,1 à 15 g/10 min, une densité de 0,910 g/cm?3¿, un taux d'indice de fusion I¿21,6?/I¿2,16? de 30 à 80, et un taux Mw/Mn de 2,5 à 5,5; et une composition de greffage au silane comprenant un composé de silane et un amorceur de radicaux libres; ou des produits de réaction de ceux-ci. Les compositions réticulables ou réticulées sont particulièrement appropriées pour des applications électriques, notamment en matière d'isolation, de semi-conduction ou de gainage de couches de câbles électriques, de câbles de télécommunications et de câbles électriques/de télécommunications combinés.

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