Monsanto Company

Solutia Incorporated

Le Moyne Plischke

Rupert J Snooks, Jr

George R McLellan

Yiqi Yang

Scott E Osborn

Jerauld L Dickerson

Richard A Dunbar

Gordon A Berkstresser, Iv

A method for removing color and extracting dyes from ionically dyeable polymeric materials is provided. The method includes contacting the ionically dyeable polymeric material with a swelling agent for the material under conditions sufficient to effect diffusion of the dye from the material. The process is especially useful for removing colors from ionically dyeable polymeric materials as part of a recycling process for such materials. Also, the extracted dye may be recovered for re-use as the swelling agent and contacting composition are substantially non-reactive with the dye.

Method for removing color from ionically dyeable polymeric materials

A process for recycling colored polyamide material comprises the steps of (a) contacting solid colored polyamide material with an organic solvent composition at a temperature effective to dissolve the polyamide, thereby forming a solution containing colorant and dissolved polyamide; and (b) separating colorant from the polyamide. The process can optionally further comprise the step of recovering the colorant, recovering the polyamide, or recovering both the polymer and colorant. The organic solvent composition preferably is selected from the group consisting of aliphatic and aromatic ketones, aliphatic and aromatic alcohols, diols, water, and combinations thereof. Solvent compositions comprising at least one alcohol selected from the group consisting of butanediol, butanol, ethanol, and benzyl alcohol are preferred, such as aqueous solutions of 1-butanol or ethanol.

Process for separating polyamide from colorant

Oligomeric condensation products including repeat units of the formula: ##STR1## wherein M.sup.+ is a monovalent metal cation; and wherein a=1 or 2 and R is C(R.sub.f).sub.3, or wherein a=O, 1 or 2 and R is ##STR2## wherein each R.sub.f group is independently selected from the group consisting of Fluorine (F) or a perfluoroalkyl group;

Stainblockers for nylon fibers

Fibers having a substance incorporated therein to kill fleas are described. Fabrics (e.g. carpet and socks) containing these fibers are useful for ridding households and household pets of fleas.

Growing community of inventors

Lillian, AL, United States of America

Le Moyne Plischke