Process for modifying wool to render it flame resistant
AssigneeApex Chemical Company, Inc.
InventorsGerson Hermann, Babubhai C. Patel, Emil Baer
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Abstract
The disclosure relates to a new and improved method of enhancing the fastness of the flame resistance properties imparted to wool by depositing a halophthalic acid derivative on the wool from an aqueous medium and which involves aftertreating such derivative-treated wool product with a fastening agent adapted to fix said derivative on the wool and thereby increase the fastness of the flame resistance properties to wet treatments and dry cleaning.
Claims12
A process for enhancing the flame resistance of wool carrying a tetrahalophthalic acid in or on the fiber which comprises after treating the so-modified wool by contacting it with an aqueous medium containing, as a fixative capable of fastening the phthalic acid compound to the wool, a water soluble or water dispersible anionic phenolic sulfonate formaldehyde condensate, an alkali metal bichromate, or colloidal antimony oxide.
In a process for simultaneously dyeing and enhancing the flame resistance of wool by exhausting tetrachlorophthalic acid or tetrabromophthalic acid thereon from an acidic dyebath having a pH of from 1.5 to 4.5, the improvement which comprises on completion of the dyeing, cooling the bath to below about 180.degree. F.;
- readjusting the pH as necessary to provide a maximum pH of about 6;
- adding a salt of 1-phenol-2-sulfonic formaldehyde condensate to the bath, and maintaining the dyed wool in contact therewith under time and temperature conditions to deposit thereon from 0.1 to 10 percent by weight of the condensate on the wool.
The aftertreated wool produced in accordance with any one of claims 1 to 12.
Dependencies are inferred from the claim text.