Stain-resistant polyamide substrates
AssigneeE. I. Du Pont de Nemours and Company
InventorEngelbert Pechhold
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Abstract
Polyamide substrates treated with stain-resists which comprise blends of maleic anhydride/alpha-olefin polymers and sulfonated phenol-formaldehyde condensation products. Some of 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 polyamide fibrous substrate having deposited on it an amount of a composition effective to impart to said substrate resistance to staining by acid dyes which is durable to shampooing, and resistance to yellowing caused by exposure to UV light and/or NO.sub.x which is durable to shampooing, comprising:
- (A) water-soluble or water-dispersible alpha-olefin/maleic anhydride polymers or a mixture of said polymers wherein said polymer consists essentially of between 0.4 and 1.3 polymer units derived from one or more alpha-olefin monomers per polymer unit derived from maleic anhydfide, 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 one 1-alkene containing 3 or 14 to 18 carbon atoms, and
- (B) a sulfonated phenol-formaldehyde condensation product, the weight ratio of A to B being in the range between 5 to 95 and 95 to 5.
Dependencies are inferred from the claim text.