Rohm and Haas Company

Michael P Bigwood

John O Naples

Eric Gustave Lundquist

Low-color bisphenols may be produced by condensing phenol with ketones in the presence of a strong-acid cation exchange resin acting as an acid catalyst for the condensation reaction, and of a small amount, relative to the acid catalyst, of a weak-base anion exchange resin.

Method for producing high-purity bisphenols

Copolymers of acrylonitrile with aliphatic cross-linkers having two or more unconjugated vinylic groups are functionalized with polyamines to form weakly basic anion exchange resins having both low rinse-volume requirements and high anion exchange capacity.

Low-rinse, high-capacity, weakly basic acrylic ion exchange resin

Carriers for immobilizing enzymes may be prepared by suspension copolymerizing an oxirane-group-bearing, monovinyl monomer and a major amount of a trivinyl crosslinking monomer having a hydrophilic character, in the presence of a phase separator which does not react with the oxirane group. The resulting carriers, in bead form, have high porosity, high surface area, and pores of diameter sufficient for ready penetration by enzymes and substrates.

Growing community of inventors

Oreland, PA, United States of America

Michael P Bigwood