Patent ID: 8507601

Claim:
A method of providing oil repellency, water repellency, and dynamic water repellency to a substrate comprising contacting the substrate with a polymer composition comprising A) a first polymer comprising, on a water free basis, (a) from about 0.1% to about 1.0% by weight hydrophobized nanoparticles; (b) from about 89% to about 99.8% by weight of one or more monomers of C 1 to C 18 , straight, branched, or cyclic alkyl (meth)acrylate; (c) from about 0.1% to about 10.0% by weight of one or more monomers selected from the group consisting of N-methylol (meth)acrylamide and monomers of formula (I) R—(OCH 2 CH 2 ) a —O—C(O)—C(R 1 )═CH 2 (I) wherein a is 1 to from about 10; R is hydrogen, C 1 -C 4 alkyl, or —C(O)—C(R 1 )═CH 2 , and R 1 is H or —CH 3 ; said first polymer in contact with B) a second polymer comprising, on a water free basis, (d) from about 70% to about 90% by weight fluorinated monomer of formula (II) R f 1 -L-X—C(O)—C(R)═CH 2 (II) wherein R f 1 is a monovalent, partially or fully fluorinated, linear or branched, alkyl radical having 2 to about 7 carbon atoms; optionally interrupted by 1 to about 6 catenary oxygen atoms; wherein the ratio of carbon atoms to oxygen atoms is at least 2:1 and no oxygen atoms are bonded to each other; L is a bond or a linear or branched divalent linking group having 1 to about 20 carbon atoms, said linking group optionally interrupted by 1 to about 4 hetero-radicals selected from the group consisting of —O—, —NR 6 —, —S—, —SO—, —SO 2 —, and —N(R 6 )C(O)— wherein R 6 is H or C 1 to C 6 alkyl, and said linking group optionally substituted with CH 2 Cl; X is —O—, —N(R)—, or —S—, wherein R is H or CH 3 ; (e) from about 10% to 30% by weight of one or more monomers of C 1 to C 18 , straight, branched, or cyclic alkyl (meth)acrylate; and (f) from about 0.1% to about 10% by weight of one or more monomers selected from the group consisting of N-methylol (meth)acrylamide and monomers of formula (I) R—(OCH 2 CH 2 ) a —O—C(O)—C(R 1 )═CH 2 (I) wherein R is hydrogen, C 1 -C 4 alkyl, or —C(O)—C(R 1 )═CH 2 , and R 1 is H or —CH 3 ; provided that the first polymer comprises from about 20% to about 75% by weight of the polymer composition; wherein the hydrophobized nanoparticles is dispersed within the first polymer (A); wherein the nanoparticles are a surface modified inorganic oxide particle comprising an oxide of M atoms independently selected from the group consisting of Si, Ti, Zn, Zr, Mn, Al, and combinations thereof; and wherein at least one inorganic oxide particle has a surface covalently bonded to at least one group represented by formula (IV) (-L 2 -) d (-L 3 ) c (—Si—R 7 (4-d) ) (IV) wherein: L 2 represents an oxygen covalently bonded to M; and each L 3 is independently selected from the group consisting of H, a C 1 -C 2 alkyl, and OH; d and c are integers such that: d is greater than or equal to 1, c is greater than or equal to 0, and the sum (d+c) is less than or equal to 3; and R 7 is a linear, branched, or cyclic alkyl group containing 1 to 18 carbon atoms.