Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1988-03-25
1989-05-23
Cannon, James C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
8560, 252 87, 428 96, 528489, 528499, D06M 1541
Patent
active
048330094
ABSTRACT:
Process for removing color-formers from polymeric sulfonated phenol-formaldehyde condensation products so as provide condensation products having reduced tendencies to turn yellow and which provide stain-resistance to polyamide textile substrates which comprises dissolving a polymeric sulfonated phenolformaldehyde condensation product in a aqueous base, acidifying the resulting aqueous solution so as to form a slurry, heating the slurry so as to form a two-phase system comprising an aqueous solution and a water-soluble taffy-like material, separating the aqueous solution and the water-insoluble material from one another, and dissolving the wate-insoluble material in an aqueous base.
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Cannon James C.
E. I. Du Pont de Nemours and Company
Feeny Charles E.
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