Method for producing crosslinked polyethylenes

Details Method for producing crosslinked polyethylenes Method for producing crosslinked polyethylenes

1979-06-28

1980-10-14

Briggs, Sr., Wilbert J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

264176R, 525245, 525248, 525260, 525262, 525263, C08L 4304

Patent

active

042282551

ABSTRACT:
A novel method for crosslinking a polyolefin comprising reacting a polyolefin, which is a low density polyethylene having a density less than 0.93 and melt index of 0.1-0.5 g/10 min. or a polyolefin mixture containing a low density polyethylene having a density less than 0.93 as major component, with an organic silane and a free radical generating compound to form a silane-grafted polyolefin, then mixing silane-grafted polyolefin with a silanol condensation catalyst, and heating them. According to this method, the crosslinking takes place concurrently with forming by extrusion, and a shaped article having a high degree of crosslinking with smooth surface is obtained. The method according to this invention is especially suited for covering electrical wires with polyolefin.

REFERENCES:
patent: 3936523 (1976-02-01), Kleeberg et al.
patent: 4058583 (1977-11-01), Glander et al.

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