Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1985-09-13
1988-09-06
Kittle, John E.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
427222, 4274301, 425407, 264141, 264142, 26417717, 264178R, 264211, 26421113, B32B 516, B05D 700, B28B 2154, D01F 102
Patent
active
047692898
ABSTRACT:
Free-flowing plural extrudates of a polar ethylene interpolymer, and method of preparing the same. The extrudates are essentially coated with about 0.001-2 percent, by weight of the composition, fumed silica, preferably about 0.025-0.05 weight percent. The fumed silica has an average primary particle size of about 5-25 millimicrons, a surface area of about 200-250 m.sup.2 /g, and is substantially amorphous and non-porous. The interpolymer has interpolymerized therein polar monomer, such as acrylic acid, n-butyl acrylate, vinyl acetate, or the like, in an amount so that the untreated extrudates have high block. The extrudates are treated by admixture with the silica or by contact with an aqueous dispersion of about 0.01-10 wt. % silica. When the interpolymer contains .alpha.,.beta.-ethylenically unsaturated carboxylic acid, the extrudates are optionally surface neutralized with a base.
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Bryce Kenneth L.
Kelly Laura A.
Kittle John E.
Lee Walter J.
Rucker Susan S.
The Dow Chemical Company
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