Patent ID: 6696154
Filing Date: 2004-02-24
Classification: C08K,H01B,Y10T

Abstract:
An electrical cable comprising at least one conducting element, at least one polyolefin-based insulating covering layer comprising at least one voltage stabilizer, wherein said voltage stabilizer is a substituted benzophenone of formula (I): wherein: R1, R2, R3 and R4, are equal or different from each other, and are selected from hydrogen; C6-C14 aryl substituted with at least one group selected from C1-C30 alkyl, C1-C30 alkoxy and C6-C14 aryloxy; C1-C30 alkyl, optionally substituted with at least one group selected from C6-C14 aryl, C1-C30 alkoxy and C6-C14 aryloxy; C1-C30 alkoxy, optionally substituted with at least one group selected from C6-C14 aryl and C6-C14 aryloxy; C6-C14 aryloxy, optionally substituted with at least one group selected from C6-C14 aryl, C1-C30 alkyl, and 01-C30 alkoxy; a group of formula (II): wherein: R1â€², R2â€², R3â€² and R4â€², are equal or different from each other, and are selected from the same groups indicated above for R1, R2, R3 and R4; and â€”Qâ€” is a group of formula â€”Oâ€”R5â€”Oâ€”, where R5 is selected from: C1-C30 alkylene, optionally substituted with at least one group selected from C6-C14 aryl, C1-C30 alkoxy and C6-C14 aryloxy; C6-C14 arylene, optionally substituted with at least one group selected from C1-C30 alkyl, C1-C30 alkoxy and C6-C14 aryloxy; wherein, optionally, the alkyl and alkoxy groups have one or more oxygen bridges (â€”Oâ€”) along the aliphatic chain; provided that at least one of the substituents R1, R2, R3 and R4 is different from hydrogen; and when said at least one group is an alkyl, optionally substituted, the carbon atom of the said alkyl which is directly linked to a phenyl ring of said benzophenone is tertiary.