C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 1/02 (2006.01)
Patent
CA 2042893
ABSTRACT OF THE DISCLOSURE A mouldable filled polyethylene composition is disclosed. The composition consists essentially of a polyethylene component, 10-60% by weight of a particulate cellulosic component and 4-20% by weight of a toughening component. The polyethylene component is 85.99%, by weight of the composition, of a homopolymer of ethylene or copolymer of ethylene and at least one C4-C10 hydrocarbon alpha-olefin, or a mixture thereof, having a density in the range of 0.89 to 0.97 g/cm3 and a melt index in the range of 0.30 to 120 dg/min., and 0.01-86%, by weight of the composition, of a grafted polyethylene obtained by the grafting of a homopolymer of ethylene or copolymer of ethylene and at least one C4-C10 hydrocarbon alpha-olefin with a grafting monomer that is at least one of an ethylenically unsaturated aliphatic carboxylic acid or anhydride. The grafted polyethylene contains at least 0.01% of the grafting monomer. The toughening component is selected from (i) ethylene/propylene/diene copolymers, (ii) ethylene/hydrocarbon alpha-olefin copolymers having a density of less than 0.910 g/cm3, (iii) copolymers of ethylene and vinyl acetate having a vinyl acetate content of at least 5%, (iv) copolymers of ethylene and at least one alpha,beta ethylenically unsaturated aliphatic carboxylic acid having from 3 to 8 carbon atoms, (v) ionomers of the copolymers of (iv), and (vi) copolymers of (c) (i)-(v) that have been grafted with at least one of an ethylenically unsaturated aliphatic carboxylic acid or ethylenically unsaturated aliphatic acid anhydride. The compositions may be used to form a variety of moulded articles e.g. containers, trays, boxes and other shaped articles. DC-9536
Fletcher Eldon Lawrence
Kershaw Bernard John
Du Pont Of Canada Inc.
Sim & Mcburney
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