Water resistant electrical insulation compositions

Details Water resistant electrical insulation compositions Water resistant electrical insulation compositions

1996-09-13

1998-02-17

Morgan, Kriellion S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524524, C08K 53495

Patent

active

057192189

ABSTRACT:
An electrically insulating cross-linked polyethylene composition for use in high voltage electrical cables, said cross-linked polyethylene being obtained by cross-linking a composition consisting essentially of 98% w/w of a low density, peroxide cross-linkable polyethylene, 1-2% w/w of a terpolymer of ethylene, vinyl acetate and vinyl alcohol and at least 0.15% w/w of a sterically hindered amine stabiliser of said composition; said terpolymer being obtained from about 40-45% hydrolysis of an ethylene-vinyl acetate copolymer having a 20-30% w/w vinyl acetate content; and wherein said polyethylene and said terpolymer have substantially the same melt index. The cross-linked polyethylene compositions have improved resistance to moisture induced degradation.

REFERENCES:
patent: 4144203 (1979-03-01), Ashcraft et al.
patent: 4820755 (1989-04-01), Webster
patent: 4870121 (1989-09-01), Bamji et al.
patent: 5300545 (1994-04-01), Kazmierczak et al.

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