W. R. Grace Co.-Conn.

Engelhard Corporation

Semyon D Friedman

Rasto Brezny

Jacob Block

Awdhoot V Kerkar

John W Lau

Chia-Chih Ou

Robert M Spotnitz

Ernest W Hughes

Poovatholil F Francis

Robert W McKinney

Martin B Sherwin

Shaohai Wu

A method for producing by electrophoretic deposition multi-layer, polyfunctional, catalyst members for use in catalytic converters having a plurality of suitably porous and adherent catalyst support coatings of substantially uniform thickness, a plurality of non-identical catalytic agents imbued therein/on, and a flexible metal substrate, are disclosed. Such process involves maintaining electrical interaction between a metal substrate previously coated with catalyst-catalyst support material, the power source, and the electrodes disposed in the electrophoretic deposition ('EPD') cell containing a slurry of a second catalyst support material and a second catalyst composition non-identical to that found in the first catalytically-active layer.

Multi-layer non-identical catalyst on metal substrate by electrophoretic

Flexible metal foil catalyst members suitable for use in catalytic devices for combustion engine emission control are prepared by electrophoretic deposition using an aqueous slurry of catalyst support particles. The deposited support layer is of uniform thickness and stable surface area. The catalyst support may then be impregnated with catalytic species and assembled into a catalytic device. The catalyst members from the invention are especially suitable for use in automotive applications, and more especially in electrically heated catalytic devices.

Metal foil catalyst members by aqueous electrophoretic deposition

A vermiculite composition capable of exhibiting a high degree of volume increase upon subjection to thermal exfoliation composed of vermiculite mineralogical species having specific gravity of from 2.5 g/cm.sup.3 to 2.9 g/cm.sup.3. Further, intumescent sheets formed with said vermiculite composition exhibit low initial expansion temperature and very high maximum expansion properties.

Vermiculite composition with improved thermal expansion properties

A vermiculite composition composed of particulate vermiculite mineral species having a density of 2.3 g/cm.sup.3 to 2.7 g/cm.sup.3 which has intercalated cations of lithium or organo ammonium and to dispersions obtained therefrom.

Vermiculite composition with improved chemical exfoliation

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Baltimore, MD, United States of America

Semyon D Friedman