Prevention of dye-bleeding and transfer during laundering
AssigneeE. I. Du Pont de Nemours and Company
InventorsDonald Douglas May, Robert Craig Buck
Life of this patent
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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.
Claims10
A composition which comprises (A) a laundry detergent and (B) a resole condensation polymer which had been prepared by reacting formaldehyde with bis(hydroxyphenyl)sulfone in the presence of a base comprising an inorganic compound having a pKa of 8.5 or higher, at a formaldehyde:bis(hydroxy-phenyl)sulfone molar ratio in the range between 0.6:1.0 and 4.0:1.0 and a base:bis(hydroxy-phenyl)sulfone molar ratio in the range between 0.1:1.0 and 3.5:1.0, the addition of said resole condensation polymer to said laundry detergent providing prevention or suppression of dye-transfer and dye-bleeding during laundering of nylon, rayon, cotton, acetate, and wool fabrics, said composition being water-soluble or water-dispersible, and when dissolved or dispersed in water provides an aqueous solution or aqueous dispersion having a pH of 6.0 to 10.0.
In a process in which nylon, rayon, cotton, acetate, or wool fabrics are laundered at a pH of 6.0 to 10.0, the improvement comprising adding a water-soluble or water-dispersible resole condensation polymer to a laundry detergent, said resole condensation polymer having been prepared by reacting bis(hydroxyphenyl)sulfone with formaldehyde in the presence of a base comprising an inorganic compound having a pKa of 8.5 or higher, at a formaldehyde:bis(hydroxyphenyl)sulfone molar ratio in the range between 0.6:1.0 and 4.0:1.0 and a base:bis(hydroxy-phenyl)sulfone molar ratio in the range between 0.1:1.0 and 3.5:1.0, the addition of said resole condensation polymer to said laundry detergent preventing or suppressing dye-transfer and dye-bleeding during said laundering of nylon, rayon, cotton, acetate, polyester, or wool fabrics.
Dependencies are inferred from the claim text.