<p>Color is removed frompolymeric materialby a method which comprises contactinga dyed or pigmented polymercomposition 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.</p>
申请公布号
WO2008125465(A1)
申请公布日期
2008.10.23
申请号
WO2008EP53778
申请日期
2008.03.31
申请人
CIBA HOLDING INC.;OZER, RONNIE;GERZEVSKE, KEVIN RODNEY