Siliceous oxide comprising an alkaline constituent
AssigneeW. R. Grace & Co.-Conn.
InventorsWilliam A. Welsh, John F. Terbot
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Abstract
Siliceous oxides having a combination of low total volatiles content and basic pH are useful as odor control agents in organic resin systems, especially polyolefin-based systems. These modified siliceous oxides advantageously reduce odor and off-trade while minimizing discoloration of the resin. The adsorbents are especially useful for resin systems containing fatty acid amide slip aids.
Claims7
A particulate siliceous oxide composition wherein said oxide comprises an alkaline constituent, has a pore volume of at least 0.1 ml/g., an average particle size by Malvern of about 0.1-30 .mu.m, a total volatiles content of about 0.4-2.0 wt. %, and a pH measured at 5 wt. % dry basis siliceous oxide concentration in deionized water of about 8.5-11.
Dependencies are inferred from the claim text.