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US 5,654,068 AGranted
Stain resists for polyamide substrates
AssigneeE. I. Du Pont de Nemours and Company
InventorEngelbert Pechhold
Life of this patent
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Abstract
A stain-resist for polyamide textiles comprises blends of maleic anhydride/alpha-olefin polymers with sulfonated phenol-formaldehyde condensation products. The stain-resist blends are water-soluble at low pH, even in the absence of surfactant, and are strongly substantive and more resistant to yellowing than the condensation products.
Claims13
A composition comprising:
- (A) a water-soluble or water dispersible alpha-olefin/maleic anhydride polymer or a mixture of said polymers wherein said polymer consists essentially of between about 0.4 and 1.3 polymer units derived from one or more alpha-olefin monomers per polymer unit derived from maleic anhydride, the alpha-olefin content of said polymer comprising between (i) 100 and 80 mol percent of at least one 1-alkene containing 4 to 12 carbon atoms and (ii) 0 to 20 mol percent of at least 1-alkene containing 3 or 14 to 18 carbon atoms, and
- (B) a sulfonated phenol-formaldehyde condensation product, the weight ratio of A:B being in the range between about 5:95 and 95:5,
- said composition being useful for imparting resistance to staining of a nylon 6 or nylon 66 fibrous substrate by an acid dye.
Dependencies are inferred from the claim text.