Polyolefin-based filling composition for electrical cables with soft polyvinyl chloride cladding, whose polyolefin is a copolymer of 1-butene, propene and/or ethene obtained by the method of Ziegler-Natta.

Cable filling composition

Blended polymer compositions are disclosed comprising an admixture of (a) 2.5% to 80% of an at least partially crystalline ethylene-α-olefin copolymer, said alpha-olefin having four or more carbons and a density of less than 0.90 and (b) from 20 to 95.5% of amorphous propylene containing polymers. The composition can be used for hot-melt adhesive and bitumen blends.

Polymer composition of amorphous propylene-containing polymers and low-density ethylene copolymer

An unvulcanised, rubber-like intermediate sheathing and filler compsn. contg. an abundant amt. of mineral filler for PVC insulated cables contains as binder a (practically) non-polar polymer (mixt.) (I) which under the working conditions is amorphous and has a Tg the working temp. (I) comprises >=70 wt. % hydrocarbon polymer of which at least the main chain is satd. The plasticiser which bleed from the PVC are absorbed by the compsn. but do not separate out again. The cable has good resistance to large and quick changing temp. variations and is flame retardant.

Savonen Joel Adiel

Papers

Intermediate cable sheathing or filler compsn. - comprises non-polar polymer esp. atactic polypropylene and (in)organic filler (NL 15.11.77)