Inventors:
Ronnie Ozer - Arden DE, US
Kevin R. Gerzevske - Wilmington DE, US
International Classification:
C08J 11/04
US Classification:
521 495, 521 485, 8102, 8107, 811551, 81161, 8194, 8196, 528480, 528495, 510407, 510409
Abstract:
Color is removed from polymeric material by a method which comprises contacting a dyed or pigmented polymer composition with a non-aqueous extraction solvent comprising a nitrogen containing organic base, an ammonium salt and an alkanol. The present method is readily applied to a process for recycling colored polyamide substrates such as dyed nylon fiber.