Patent ID: 6395655
Filing Date: 2002-05-28
Classification: D06M,Y10T

Abstract:
A fibrous polyamide substrate having resistance to staining by acid colorants comprising:a fibrous polyamide substrate having applied thereto: a) a semi-bleached to bleached sulfonated aromatic condensation resin, said resin being selected from the group consisting of condensation products of: i) phenolsulfonic acid, dihydrodydiphenyl sulfone and an aldehyde; ii) sulfonated dihydroxdiphenyl sulfone, dihydroxydi-phenyl sulfone and an aldehyde; iii) sulfonated dihydroxydiphenyl sulfone and an aldehyde; and iv) mixtures of i), ii) and iii), and b) a methacrylic acid polymer having a weight average molecular weight of 100,000 to 500,000 and a number average molecular weight of 50,000 to 100,000, said methacrylic acid polymer being semi-soluble such that it is rendered resistant to wet cleaning processes thereby producing durable stain resistance, while providing initial stain resistance, prior to wet cleaning of the substrate.