METHOD OF PROVIDING REPELLENCY

摘要

A method of providing water repellency, alcohol repellency, oil repellency, and soil resistance to substrates comprising contacting said substrate with a composition comprising a copolymer having repeating units of Formula 1 in any sequence: [R_f(CH₂)_kOC(O)NH(CH₂)_k OC(O)C(T)CH₂]_m -[W_q]_p -, wherein R_f is a straight or branched perfluoroalkyl group having from about 2 to about 8 carbon atoms, or a mixture thereof, which is optionally interrupted by at least one oxygen atom, each k is independently a positive integer from 1 to about 6, T is hydrogen or methyl, m is a positive integer, q is zero or a positive integer, p is zero or a positive integer, and W is (formula I) or (formula II) or -[R₁-X-Y-C(O)-CZ-CH₂]-, wherein X is an organic divalent linking group having from about 1 to about 20 carbon atoms, optionally containing a triazole, oxygen, nitrogen, or sulfur, or a combination thereof, Y is O or N(R) wherein R is H or C₁ to C₂₀ alkyl, Z is H, a straight or branched alkyl group having from about 1 to about 4 carbon atoms, or halide, Rx is C(O)O(R₁), C(O)N(R₂)₂, OC(O)(R₁), SO₂(R₁), C₆(R₃)_g H_(5-g), O(R₁), halide, or R₁; each R₁ is independently H, C_nH_2n+1, C_nH_2n-CH(O)CH₂, [CH₂CH₂O]_iR₄, [C_nC_2n]N(R₄)₂ or [C_nH_2n]C_nF_2n+1, n is 1 to about 40, R₄ is H or C_sH_2s+1, s = 0 to about 40, i = 1 to about 200, each R₂ is independently H, or C_tH_2t+1 wherein t is 1 to 20, each R₃ is independently R₄, COOR₁, halogen, N(R₁)₂, OR₁, SO₂NHR₁, CH=CH₂, or SO₃M, g is 1 to 5, and M is H, alkali metal salt, alkaline earth metal salt, or ammonium.