| abstract |
A polymer composition comprising A) a first polymer comprising (a) hydrophobized nanoparticle; (b) C 1 to C 18 , straight, branched, or cyclic alkyl (meth)acrylate; (c) N-methylol (meth)acrylamide or a monomer 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 ; said first polymer in contact with B) a second polymer comprising (d) a fluorinated monomer of formula (II) : R f n 1 -L-X-C(O)-C(R)=CH 2 (II) wherein R f n 1 is a monovalent, partially or fully fluorinated, linear or branched, alkyl radical having 2 to about 100 carbon atoms; optionally interrupted by 1 to about 50 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) a monomer as described in (b) above; and (f) a monomer as described in (c ) above; provided that the first polymer comprises from about 50% to about 70 % by weight of the polymer composition, and its use to provide oil repellency, water repellency, and dynamic water repellency to substrates. |