FLUOROPOLYMER EMULSIONS

摘要

A polymer composition comprising A) a first polymer comprising (a) hydrophobized nanoparticle; (b) C1 to C18, straight, branched, or cyclic alkyl (meth)acrylate; (c) N-methylol (meth)acrylamide or a monomer of formula (I) : R (OCH2CH2)a-O-C(O) C(R1)=CH2 (I) wherein R is hydrogen, C1 - C4 alkyl, or -C(O)-C(R1)=CH2, and R1 is H or -CH3; said first polymer in contact with B) a second polymer comprising (d) a fluorinated monomer of formula (II) : Rf 1-L-X-C(O)-C(R)=CH2 (II) wherein Rf 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, NR6, S, SO-, SO2, and -N(R6)C(O)- wherein R6 is H or C1 to C6 alkyl, and said linking group optionally substituted with CH2Cl; X is -O-, N(R)-, or -S-, wherein R is H or CH3; (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.