Abstract: Polyamide fibrous substrates which resist staining by acid dyes, and processes for preparing the same which comprise applying, at pH 2 to 10, a base-catalyzed condensation product formed by the condensation reaction of a mixture of bis(hydroxyphenyl)sulfone and at least one other phenolic compound with formaldehyde to give a product known as a resole.

Abstract: A composition which provides polyamide substrates with resistance to staining by acid dyes comprising(A) carboxylic acid-containing stain-resist polymers selected from:(i) methacrylic acid polymers, or(ii) hydrolyzed copolymers of maleic anhydride with ethylenically unsaturated aromatics, alpha-olefins, alkyl vinyl ethers or alkyl allyl ethers or(iii) mixtures of (i) and (ii),and(B) resole condensates prepared by reacting bis(hydroxyphenyl)sulfone which contains no sulfonate or carboxylate groups with formaldehyde in the presence of an alkali metal hydroxide, at a bis(hydroxyphenyl)sulfone resole resin:carboxylic acid-containing stain-resist polymer weight ratio in the range between about 1:20 and 2.5:1.0 is disclosed.

Abstract: Adding to a laundry detergent a resole condensation polymer prepared by reacting bis(hydroxyphenyl)sulfone with formaldehyde in the presence of a base thereby preventing or suppressing dye-transfer and dye-bleeding during laundering of nylon, rayon, cotton, acetate, or wool fabrics is disclosed.