FIELD: chemistry.
SUBSTANCE: invention relates to a method of preparing a polyethylene based composition capable of peroxide cross-linking, which is meant for making articles for various purposes at the end of the cross-linking process, e.g. cable insulation, machine housings, semiconductor protective screens and tubes. The method involves pre-mixing a liquid organic peroxide, a liquid antioxidant and a liquid light stabiliser. The obtained liquid mixture is then added to polyethylene powder at room temperature and stirred intensely, preferably at mixer rotational speed of 800-1500 rpm. The light stabiliser used is at least one liquid sterically hindered amine.
EFFECT: using simple technology to prepare a peroxide cross-linked polyethylene composition, which can be stored for up to four or more days at room temperature with preservation of its activity.
4 cl, 2 tbl, 7 ex
