Treatment of fibrous substrates to impart repellency, stain resistance, and soil resistance
Assignee3M Innovative Properties Company
InventorsJohn C. Clark, John C. Newland, Robert F. Kamrath, Malcolm B. Burleigh, Kevin R. Schaffer
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Abstract
A process is described which imparts exceptional antisoiling, anti-staining and repellent properties to carpets. The process makes use of a water-based exhaustion process wherein the water-based treating solution contains (1) glassy fluorochemical material, glassy hydrocarbon material, or combinations thereof; (2) a stainblocking material; (3) a polyvalent metal salt, acid, or combinations thereof; and (4) water. Subsequent to exhaustion, the wet treated carpet is heated, usually in a steaming step, rinsed, and dried in a dry heat oven.
Claims20
A fluorine-free material having at least one pendant hydrocarbon moiety, said material being the product of a condensation reaction between a biuret isocyanate trimer and an alcohol having at least 10 carbon atoms;
- wherein said material has a receding contact angle to n-hexadecane of at least about 35° and a glass transition temperature within the range of about 20° C. to about 130° C., and wherein the trimer and the alcohol are reacted at a ratio of at least about 3 moles of alcohol per mole of trimer.
A fluorine-free material having at least one pendant hydrocarbon moiety, said material being formed by reacting a biuret isocyanate trimer with an alcohol having at least 10 carbon atoms, wherein the trimer and the alcohol are reacted at a ratio of at least about 3 moles of alcohol per mole of trimer.
Dependencies are inferred from the claim text.