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US 12,674,074 B2Granted
Durable water-repellent treatment for synthetics and natural fibers
OwnerGary S. Selwyninventor
Life of this patent
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Abstract
Aqueous-based coating compositions include a drying oil, a fatty acid or alkylamine fatty acid, and alkyl amine, 50-90% water and one or more waxes. When applied to a fabric and cured in air, the compositions form water repellent coatings that are laundry durable. A dye may be included in the coating composition; in such cases a durable water-repellent coating is applied to the fabric and the fabric is dyed in a single curing step.
Claims20
A coating composition in the form of an emulsion comprising, based on the total weight of the liquid composition,
- a) 5 to 35 wt-% of a drying oil;
- b) 0.25 to 5 wt.-% of a fatty acid or fatty alcohol component selected from the group consisting of fatty acids having at least 12 carbon atoms and 0 to 2 non-conjugated carbon-carbon double bonds, alkylamine fatty acids having in the fatty acid portion at least 12 carbon atoms and 0 to 2 non-conjugated carbon-carbon double bonds and fatty alcohols having at least 12 carbon atoms and 0 to 2 non-conjugated carbon-carbon double bonds;
- c) 2 to 10 wt.-% of an alkylamine having a boiling temperature of 75 to 160° C., provided the amount of alkylamine is 0.2 to 1.25 parts by weight per part by weight of the drying oil;
- d) 50 to 90 wt.-% water;
- and
- e) 0.25 to 7.5 wt.-% of a wax or a mixture of waxes, the wax or mixture of waxes having a melting temperature of at least 60° C.
3 more elements
Dependencies are inferred from the claim text.