American Cyanamid Company

Cytec Technology Corporation

Larry S Anderson

David A Ley

Laurence W Chang

Balwant Singh

Stephen F Donovan

Michael T Cooke

Novel substituted urea and oxime carbamate modified amino crosslinking agents, curable compositions containing the same, including curable powder coating compositions, are disclosed. Also disclosed is a novel process for preparing pyrrolidone urea.

Substituted urea and oxime modified amino crosslinking agents, curable

A bead composition is disclosed herein which comprises a core of a polyacrylonitrile homopolymer or copolymer and a surface of pendant N-haloamide groups. Also disclosed is a process for the production of said composition.

Surface-modified polyacrylonitrile beads

A porous shaped substrate such as a porous bead is formed from polyacrylonitrile or a copolymer thereof containing nitrile groups. The substrate has a hydrophilic surface containing amide groups constituting about 1.8 mole percent to less than about 15 mole percent of the total nitrile groups, and containing no amide or carboxyl groups. The substrate is substantially non-swellable in water and is able to resist pressures in a columnar bed of up to about 3000 psi without collapsing. In forming the amide groups, polyacrylonitrile or copolymer thereof containing nitrile groups, an alkaline catalyst such as sodium hydroxide and a nonsolvent for the substrate such as methanol are combined to form a suspension. A peroxide is added to the suspension and the suspension is heated to hydrolyze nitrile groups to amide groups. Succinylated aminoethyl groups or activated carboxyl groups can be formed on the substrate and a bioactive ligand such as p-aminobenzamidine covalently bonded to the substrate. The bound ligand can then be used to complex a biologically active substance such as an enzyme to separate the substance from solution.

Porous acrylonitrile polymer substrate for bonding ligands and

A surface-modified fibrillated fiber composition is disclosed herein which comprises polyacrylonitrile homopolymer or copolymer and a surface of pendant N-haloamide groups. Also disclosed is a process for the production of said composition.

Surface-modified polyacrylonitrile fibrous substrates

A composition is disclosed herein which comprises a core of a polyacrylonitrile homopolymer or copolymer and a surface of N-haloamides. Also disclosed is a process for the production of said composition.

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Bethel, CT, United States of America

Larry S Anderson