Ppg Industries Ohio, Inc.

Shantilal Mohnot

Timothy A Okel

Harold E Swift

Daniel E Rardon

Scott J Moravek

Stephen John Thomas

Raphael O Kollah

Stanley R Pickens

Carol L Knox

Justin Jonathan Martin

Qunhui Guo

James T Dew

Erik A Schoenman

Patrick Ryan

The present invention is directed to methods of improving burnish resistance of substrates comprising:

Methods of improving burnish resistance using curable film-forming compositions demonstrating burnish resistance and low gloss

The present invention is directed to a separation medium comprising rotary dried or spray dried precipitated silica. The silica has a pore surface area P wherein logP&#x3e;2.2, and the ratio of BET to CTAB is at least 1.0 measured prior to any surface modification of the silica. The present invention is further directed to a method of separating suspended or dissolved materials from a fluid stream, comprising contacting the stream with the separation medium described above.

Precipitated silica sorbents and method of separating materials from a fluid stream

Describes a composition comprising a mixture of (1) a major amount of calcium hypochlorite, e.g., hydrated calcium hypochlorite, and (2) a minor amount of calcium hypochlorite-compatible hydrophobic additive (other than discrete particulate Group IIA or IIIA metal stearates) in amounts sufficient to provide the composition with reduced hydrophilic properties. The composition has a solution rate in water at standard conditions that is less than the calcium hypochlorite used to prepare the composition, but sufficient for the intended application. Describes also calcium hypochlorite compositions in which the hydrophobic additive is an organo-silicon material, or a metal oxide, e.g., amorphous precipitated silica, treated with a hydrophobizing agent, such as an organo-silicon material, e.g., an organo-silane and/or organo-siloxane material.

Calcium hypochlorite composition

A silica-based particulate material that may contain less than 5 wt. % of a multivalent cation and a method of preparing such a silica-based particulate material. The silica-based particulate material may be characterized as having a median particle size of at least 20 &#x3bc;m, a BET surface area of at least 90 m/g, and a pH of at least 9.5; or as having a median particle size of up to 20 &#x3bc;m and a pH of at least 10. The silica-based particulate material may be used to make hydrophobic silica-based particulates, which may be characterized as having a pH of at least 10.5.

Silica-based particulates

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Murrysville, PA, United States of America

Shantilal Mohnot