E.i. Dupont De Nemours and Company

Yunghsing Samson Hsu

Charles David Musick

Narayanan Sankara Subramanian

Peter Jernakoff

Stephan Claude De La Veaux

Philipp Martin Niedenzu

Kevin J Leary

Stephen Claude De La Veaux

John Nicholas Birmingham

Kevin Joseph Leary

Philipp M Niedinzu

Narayanan S Subramanian

One aspect of the invention is to provide a composition comprising a titanium dioxide particle having on the surface of said particle a substantially encapsulating layer comprising a pyrogenically-deposited metal oxide; said substantially encapsulating layer having on its surface at least one organic surface treatment material selected from an organo-silane, an organo-siloxane, a fluoro-silane, an organo-phosphonate, an organo-acid phosphate, an organo-pyrophosphate, an organo-polyphosphate, an organo-metaphosphate, an organo-phosphinate, an organo-sulfonic compound, a hydrocarbon-based carboxylic acid, an associated ester of a hydrocarbon-based carboxylic acid, a derivative of a hydrocarbon-based carboxylic acid, a hydrocarbon-based amide, a low molecular weight hydrocarbon wax, a low molecular weight polyolefin, a co-polymer of a low molecular weight polyolefin, a hydrocarbon-based polyol, a derivative of a hydrocarbon-based polyol, an alkanolamine, a derivative of an alkanolamine, an organic dispersing agent, or a mixture thereof. Another aspect of the invention is to provide processes for producing said composition.

Preparation of organic additive-treated, pyrogenic silica-encapsulated titanium dioxide particles

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Long Beach, MS, United States of America

Yunghsing Samson Hsu