Polyolefin resin composition

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/00 (2006.01) C08K 7/00 (2006.01) C08L 23/26 (2006.01) H01B 3/44 (2006.01)

Patent

CA 2389611

A polyolefin resin composition which has excellent flame retardancy, in particular, has excellent flame retardancy due to the ability to retain its shape during combustion, and which is excellent also in mechanical strength and thermal properties; a thermoplastic resin for electric-wire coating or sheathing which comprises the composition; and an insulated electrical wire. The polyolefin resin composition is a composition which comprises 100 parts by weight of a polyolefin resin and 0.1 to 100 parts by weight of a phyllosilicate and which, when burned by heating for 30 minutes under the conditions of 50 kW/m2, gives a combustion residue having a stress at yield of 4.9x103 Pa or higher when compressed at a rate of 0.1 cm/s.

L'invention concerne une composition de résine de polyoléfine présentant d'excellentes propriétés ignifugeantes, notamment dues à sa capacité de conserver sa forme durant la combustion, ainsi qu'une excellente résistance mécanique et d'excellentes propriétés thermiques. L'invention porte également sur une résine thermoplastique renfermant cette composition destinée à enrober ou à recouvrir des fils électriques, et sur un fil électrique isolé. Cette composition de résine de polyoléfine comprend 100 parties en poids d'une résine de polyoléfine et 0,1 à 100 parties en poids d'un phyllosilicate et donne, lorsqu'elle est brûlée pendant 30 minutes à 50 kW/m?2¿, un résidu de combustion présentant une limite d'élasticité supérieure ou égale à 4,9x10?3¿ Pa lorsqu'elle est comprimée à un débit de 0,1 cm/s.

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