C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
18/1028, 400/907
C08L 23/00 (2006.01) C08K 3/00 (2006.01) B29F 5/02 (1980.01)
Patent
CA 1040779
ABSTRACT OF THE DISCLOSURE Solid, homogeneous, particulate, highly- filled polyolefin composites which comprise (a) about 10-70% by weight of polyolefin having an inherent viscosity of at least about 4 selected from the group consisting of homopolymers of 1- alkenes of 2 to about 10 carbons and copolymers of 1-alkenes of 2 to about 10 carbons with each other, and (b) about 30-90% by weight of finely-divided inorganic filler compound having a neutral-to- acidic surface and a weight-average equivalent spherical particle diameter of about 0.1-50 µ, and having interacted at its surface sufficient catalytically-active transition metal compound to provide about 0.000001-1.7 millimole of transi- tion metal per gram of filler, said polyolefin being polymerized onto the surface of said filler, and said composite having a 10-second micronization homogeneity of at least about 50% and a micronization homo- geneity index of at least about 20, are described as well as methods of their preparation and methods of forming objects having outstanding properties from these composites.
215821
E.i. Du Pont de Nemours And Company
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