Surfactant-containing fluorochemical compositions, articles, and methods

A method of imparting oil and/or water repellency to a fibrous substrate having one or more surfaces, the method comprising:

• applying an aqueous fluorochemical treatment composition onto one or more surfaces of the fibrous substrate;
• and
• curing the fluorochemical treatment composition at a temperature of 170° C. to 200° C.;
• wherein the fluorochemical treatment composition comprises:
• at least one fluorinated compound selected from the group consisting of fluorochemical urethanes and polyurethanes, fluorochemical blocked urethanes and polyurethanes, fluorochemical poly(meth)acrylates, and mixtures thereof;
• and
• greater than 3 wt-% and up to 20 wt-%, based on fluorinated solids, of at least one surfactant having the following formula (Formula I):
• wherein:
• each R1is independently a long chain, linear or branched, saturated or unsaturated, aliphatic group having 6 to 24 carbon atoms;
• each R2 is independently a divalent alkylene group having 1 to 4 carbon atoms;
• R3 is an alkyl group having 1 to 4 carbon atoms;
• R4 and R5 are each independently —CH2C(O)OH, —CH2CH2OH, —(R2O)n—H, an alkyl group having 1 to 4 carbon atoms, or —R2—Y—C(O)—R1, with the proviso that only one of R4 or R5 can be —R2—Y—C(O)—R1 in any one compound;
• each Y is independently O or NH;
• n is 1-10;
• and
• X− is an anion;
• wherein the composition is in the form of an aqueous dispersion having an average particle size of below 200 nanometers;
• and
• wherein when the fibrous substrate is a polyester fibrous substrate, and after applying and curing the fluorochemical treatment onto the polyester fibrous substrate, the polyester fibrous substrate has:
• a Bundesmann of at least 4-3-1;
• and
• an initial Spray Rating of at least 100;
• and
• a Spray Rating of at least 80 after 5 launderings.

A method of imparting oil and/or water repellency to a fibrous substrate having one or more surfaces, the method comprising:

• applying an aqueous fluorochemical treatment composition onto one or more surfaces of the fibrous substrate;
• and
• curing the fluorochemical treatment composition at a temperature of greater than 100° C. and no more than 200° C.;
• wherein the aqueous fluorochemical treatment composition comprises:
• at least one fluorinated compound selected from the group consisting of fluorochemical urethanes and polyurethanes, fluorochemical blocked urethanes and polyurethanes, fluorochemical poly(meth)acrylates, and mixtures thereof;
• and
• greater than 3 wt-% and up to 20 wt-%, based on fluorinated solids, of at least one surfactant having the following formula (Formula II):
• wherein:
• each R1 is independently a long chain, linear or branched, saturated, aliphatic group having 14 to 18 carbon atoms;
• each R2 is independently a divalent alkylene group having 2 carbon atoms;
• R3 is methyl;
• R6 is an alkyl group having 1 to 4 carbon atoms or —(R2O)n—H;
• each Y is O;
• n is 1;
• and
• X− is selected from the group consisting of I−, Cl−, Br−, SO4−, PO4−, NO3−, CH3COO−, CH3OSO3−, and CF3 OSO3−;
• wherein the composition is in the form of an aqueous dispersion having an average particle size of below 200 nanometers;
• wherein the composition has a sediment level of 0.1% by weight or less;
• and
• wherein when the fibrous substrate is a polyester fibrous substrate, and after applying and curing the fluorochemical treatment onto the polyester fibrous substrate, the polyester fibrous substrate has:
• a Bundesmann of at least 4-3-1;
• and
• an initial Spray Rating of at least 100;
• and
• a Spray Rating of at least 80 after 5 launderings.

A method of imparting oil and/or water repellency to a fibrous substrate having one or more surfaces, the method comprising:

• applying an aqueous fluorochemical treatment composition onto one or more surfaces of the fibrous substrate;
• and
• curing the fluorochemical treatment composition at a temperature of 170° C. to 200° C.;
• wherein the fluorochemical treatment composition comprises:
• at least one fluorinated compound selected from the group consisting of fluorochemical urethanes and polyurethanes, fluorochemical blocked urethanes and polyurethanes, fluorochemical poly(meth)acrylates, and mixtures thereof;
• and
• greater than 3 wt-% and up to 20 wt-%, based on fluorinated solids, of at least one surfactant having the following formula (Formula I):
• wherein:
• each R1 is independently a long chain, linear or branched, saturated or unsaturated, aliphatic group having 14 to 18 carbon atoms;
• each R2 is independently a divalent alkylene group having 2 carbon atoms;
• R3 is methyl;
• R4 and R5 are each independently —CH2C(O)OH, —CH2CH2OH, —(R2O)—H, an alkyl group having 1 to 4 carbon atoms, or —R2—Y—C(O)—R1 , with the proviso that only one of R4 or R5 can be —R2—Y—C(O)—R1 in any one compound;
• Y is O;
• n is 1;
• and
• X− is selected from the group consisting of I−, Cl−, Br−, SO4−, PO4−, NO3−, CH3COO−, CH3 OSO3−, and CF3OSO3−;
• wherein the composition is in the form of an aqueous dispersion having an average particle size of below 200 nanometers;
• wherein the composition has a sediment level of 0.1% by weight or less;
• and
• wherein when the fibrous substrate is a polyester fibrous substrate, and after applying and curing the fluorochemical treatment onto the polyester fibrous substrate, the polyester fibrous substrate has:
• a Bundesmann of at least 4-3-1;
• and
• an initial Spray Rating of at least 100;
• and
• a Spray Rating of at least 80 after 5 launderings.