Sulfonated polyamides
AssigneeMonsanto Company
InventorJawed Asrar
Life of this patent
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Abstract
Sulfonated polyamides, e.g. aliphatic polyamides such nylon-6 and nylon-6,6, partially aromatic polyamides and polyaramides such as poly(phenyldiamidoterephthalate), provided with sulfonate radicals chemically bonded as amine pendant groups to nitrogen atoms in the polymer backbone are useful for stainblocking polyamide textile articles and as precursors for providing electrolessly-deposited metal-coatings on palladium sulfonate modified surfaces. Nickel-coated polyaramide textile material have surprisingly exceptional flame resistance.
Claims13
A metal-coated polyamide article having benzylsulfonate or propylsulfonate groups chemically attached to amide nitrogen of the polyamide in a surface layer between the polyamide article and a metal coating.
Polyaramide having benzylsulfonate groups chemically attached to at least 1 percent of the amide groups of said polyaramide.
An article comprising a polyamide substrate having sulfonate groups substituted on amide nitrogen at the surface thereof wherein substantially all of said sulfonate groups are within 1 micrometer from said surface.
A stain-resistant textile article comprising polyamide fibers having sulfonate groups chemically attached to amidenitrogen at the surface.
A method chemically attaching sulfonate groups to amide nitrogen of polyamide comprising:
- (a) wetting said polyamide in a solvent comprising dimethylsulfoxide or a butoxide salt, and
- (b) then wetting the polyamide with a solution comprising bromobenzylsulfonate or propylsultone.
Dependencies are inferred from the claim text.