Dow Global Technolgoies LLC

Dow Silicones Corporation

Rohm and Haas Electronic Materials Korea Ltd.

Timothy J Gallagher

Aleksander Jozef Pyzik

Robert Thomas Nilsson

Chan Han

Sten A Wallin

Robin Paul Ziebarth

Arthur Richard Prunier, Jr

Sharon Allen

Chandan Saha

Sukrit Mukhopadhyay

Kyoung Moo Koh

Hong-Yeop Na

David E Wallick

Mark E Ondari

James Andrew Kenney

Phillip Griffith

Arthur R Prunier

An improved process for the preparation of high viscosity (i.e., greater than 1 million mPa·s at 25° C.) silanol-terminated silicone polymers and copolymers, often referred to in the industry as silanol-terminated silicone polymer gums. The silanol-terminated silicone polymer gums are made by the ring-opening polymerisation of organocyclosiloxane oligomers (alternatively referred to as cyclic siloxane oligomers) using a conical screw dump extruder (). It also relates to silanol-terminated silicone polymer gums made by the process.

Polymerisation of siloxane polymers

Provided is a composition comprising one or more phenanthroquinazoline-core compounds having structure (I) wherein each of Rand Ris independently a substituted or unsubstituted phenyl group.

Phenanthroquinazoline-core compounds

A porous mullite composition is made by Forming a mixture of one or more precursor compounds having the elements present in mullite (e.g., clay, alumina, silica) and a property enhancing compound. The property enhancing compound is a compound having an element selected from the group consisting of Mg, Ca, Fe, Na, K, Ce, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb, Lu, B, Y, Sc, La and combination thereof. The mixture is shaped and to form a porous green shape which is heated under an atmosphere having a fluorine containing gas to a temperature sufficient to form a mullite composition comprised substantially of acicular mullite grains that are essentially chemically bound.

Porous mullite bodies and methods of forming them

A porous mullite composition is made by forming a mixture of one or more precursor compounds having the elements present in mullite (e.g., clay, alumina, silica) and a property enhancing compound. The property enhancing compound is a compound having an element selected from the group consisting of Mg, Ca, Fe, Na, K, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, B, Y, Sc, La and combination thereof. The mixture is shaped and to form a porous green shape which is heated under an atmosphere having a fluorine containing gas to a temperature sufficient to form a mullite composition comprised substantially of acicular mullite grains that are essentially chemically bound.

This invention addresses methods and compositions for providing alkyl diphenyl oxide sulfonic acid blends at useful viscosities for use in surfactants such as DOWFAX-containing surfactants. The low viscosity alkyl diphenyl oxide sulfonic acid blend is made by admixing a fatty acid having a carboxylic chain length between 1 and 12 (e.g., formic acid, acetic acid, propionic acid, butanoic acid, pentanoic acid, valeric acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, or dodecanoic acid into an alkyl diphenyl oxide sulfonic acid reaction product to provide between about 5 weight percentage and about 50 weight percentage of fatty acid in the admixture.

Low viscosity alkyl diphenyl oxide sulfonic acid blends

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Midland, MI, United States of America

Timothy J Gallagher