Process for dyeing absorbent microbiocidal fabric and product so produced
AssigneeBurlington Industries, Inc.
InventorA. Frank Baldwin
Life of this patent
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Abstract
Dyed, absorbent bioactive wettable fabrics are prepared by mixing together a wettable hydrophilic organosilicone polymer, a tinctorial amount of a compatible direct dye and a bioactive silyl quanternary amine. The mixture is applied to a non-woven cellulose-containing substrate then heated to dye the coated substrate, fix the dye and couple the microbiocide and hydrophilic coupling agent to the substrate. Fabric so produced is useful as an absorbent surgical drape or dressing to isolate a surgical incision site while providing an absorbent antimicrobial field to destroy migrating and cross-contaminating bacteria, algae and fungi.
Claims6
A process for making a dyed, absorbent, bioactive wettable medical fabric comprising the steps of:
- (a) mixing (1) a wettable hydrophilic coupling amount of an organosilicone terpolymer of the formula:
- ##STR3## wherein R is hydrogen or methyl, the sum of a+b is in the range of 5 to 200, x is 10 to 50,000, y is 1 to x and z is 1 to 0.5x provided that the sum of y+z is .ltoreq.0.75x with (2) a tinctorial amount of a compatible direct dye, and (3) bioactive amount of a bioactive silyl quaternary amine compounds have the formula:
- ##STR4## wherein R is an alkyl of 11 to 22 carbon atoms and R.sup.1 is a bromine or chlorine;
- and
- (b) applying the mixture of step (a) to a non-woven cellulose-containing substrate;
- and
- (c) heating the thus coated substrate from step (b) to dry the substrate and fix the dye, microbiocide and hydrophilic coupling agent to said substrate, thereby producing a dyed, bacteriocidal substantially non-leachable and non-flammable finish which is substantive on said substrate.
Dependencies are inferred from the claim text.