Fluoropolymer compositions and treated substrates

A method of providing water repellency, oil repellency, soil resistance, hydrophilic stain release, and wicking to substrates comprising contacting said substrate with a polymer having at least one carbamate linkage prepared by:

• (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, having isocyanate groups, and (b) at least one fluorinated compound selected from the formula (I):
• Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r—XH (I)
• wherein
• Rf is a linear or branched chain perfluoroalkyl group having 1 to about 6 carbon atoms;
• subscript x is an integer from 1 to about 6;
• subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof;
• subscript r is 0 or 1;
• the total number of carbons in said formula (I) excluding (R1)r—XH ranges from about 8 to about 22;
• X is —O—, —NR—, —S—, —S(CH2)tO—, or —S(CH2)tNR—;
• subscript t is from 1 to about 10;
• R is H or C1-4 alkyl;
• R1 is a divalent radical selected from the group consisting of S(CH2)n—,
• n is an integer of 2 to 4;
• s is an integer of 1 to 50;
• R2, R3, and R4 are each independently hydrogen or an alkyl group containing 1 to 6 carbon atoms;
• and
• (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.

A substrate to which has been applied a polymer having at least one carbamate linkage prepared by:

• (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, having isocyanate groups, and (b) at least one fluorinated compound selected from the formula (I):
• Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r—XH (I)
• wherein
• Rf is a linear or branched chain perfluoroalkyl group having 1 to about 6 carbon atoms;
• subscript x is an integer from 1 to about 6;
• subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof;
• subscript r is 0 or 1;
• the total number of carbons in said formula (I) excluding (R1)r—XH ranges from about 8 to about 22;
• X is —O—, —NR—, —S—, —S(CH2)tO—, or —S(CH2)tNR—;
• subscript t is from 1 to about 10;
• R is H or C1-4 alkyl;
• R1 is a divalent radical selected from the group consisting of —S(CH2)n—,
• n is an integer of 2 to 4;
• s is an integer of 1 to 50;
• R2, R3, and R4 are each independently hydrogen or an alkyl group containing 1 to 6 carbon atoms;
• and
• Rf is a linear or branched chain perfluoroalkyl group having 1 to 6 carbon atoms;
• and
• (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.