Rohm and Haas Company

James Clarence Day

Robert Michael Mason

Donald Alan Ebert

Josefina Tseng Chapman

Chorng-Shyuan Tsay

Ward Thomas Brown

Michael Stanley DeCourcy

Matthew Steward Gebhard

Timothy Allen Hale

Linda S Smith

Jamie Jerrick John Juliette

Keith Frederick Briegel

Thomas Albert Kaminski

Michael Stanley Decourcy

A process for the high yield production of high purity glacial methacrylic acid ('HPMAA') with minimization of decomposition of hydroxy isobutyric acid (HIBA). The HPMAA is substantially pure, specifically 99% pure or greater with a water content of 0.05% or less. This improved process involves the steps of providing a crude MAA stream which was formed by hydrolyzing acetone cyanohydrin and, therefore, includes HIBA which is an intermediate product of the hydrolysis reaction, and purifying that crude methacrylic acid stream in a series of successive distillation steps.

Process for manufacturing high purity methacrylic acid

This invention relates to a process for preparing (meth)acrylic acid, whereby turndown control is utilized to maintain optimal distillation column performance in the dehydration of aqueous (meth)acrylic acid to provide a (meth)acrylic acid solution.

Process for preparing (meth) acrylic acid

This invention relates to a process for preparing acrylic acid which utilizes an aqueous stream which includes recycled wastewater, at least part of which is stripped of undesirable components in a stripping column prior to being recycled to an acrylic acid absorber.

Process for preparing (meth)acrylic acid

A method for reducing the amount of microfoam in a spray-applied clear waterborne composition is provided, the clear waterborne composition including an emulsion-polymerized addition polymer bearing at least one first reactive group and a reactive modifier bearing one second reactive group and a water-soluble group, the second reactive group being reactive with the first reactive group; applying the composition to a substrate using a spray method; and drying the composition. A reduced amount of microfoam improves the clarity of a film of the composition. Also provided are monofunctional carbodiimide reactive modifiers and substrates bearing the spray-applied clear compositions.

Method for reducing microfoam in a spray-applied waterborne composition

Disclosed are certain aromatic polycarbodiimides. Also disclosed is the use of an aromatic polycarbodiimide containing only aromatic carbodiimide groups as a cross-linker for a coating binder polymer bearing carboxyl groups.

Aromatic polycarbodiimide crosslinkers

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North Wales, PA, United States of America

James Clarence Day