Patent ID: 6087462
Filing Date: 2000-07-11
Classification: C08F

Abstract:
A coating composition consisting essentially of (a) a polymer formed by the radical polymerization of monomers consisting essentially of(i) a zwitterionic monomer of general formula (I):Y--B--X (I)wherein B is selected from the group consisting of straight and branched alkylene, oxaalkylene and oligo-oxaalkylene chain optionally containing one or more fluorine atoms and a valence bond;X is a zwitterionic group andY is an ethylenically unsaturated polymerisable group selected from ##STR21## wherein: R is hydrogen or a C.sub.1 -C.sub.4 alkyl group;A is --O-- or --NR.sup.1 -- where R.sup.1 is hydrogen or a C.sub.1 -C.sub.4 alkyl group or R.sup.1 is --B--X where B and X are as defined above; andK is a group --(CH.sub.2).sub.p OC(O), --(CH.sub.2).sub.p C(O)O--, --(CH.sub.2).sub.p OC(O)O--, (CH.sub.2).sub.p NR.sup.2 --, --(CH.sub.2).sub.p NR.sup.2 C(O)--, --(CH.sub.2).sub.p C(O) NR.sup.2 --, --(CH.sub.2).sub.p NR.sup.2 C(O)O--, --(CH.sub.2).sub.p OC(O)NR.sup.2 --, --(CH.sub.2).sub.p NR.sup.2 C(O)NR.sup.2 --(in which the groups R.sup.2 are the same or different), --(CH.sub.2).sub.p O--, --(CH.sub.2).sub.p SO.sub.3 --, or, optionally in combination with B, a valence bond and p is from 1 to 12 and R.sup.2 is hydrogen or a C1-C4 alkyl group; and(ii) a hydrophobic comonomer of the general formula formula (VI):Y.sup.1 --Q (VI)where Y.sup.1 is an ethylenically unsaturated polymerisable group selected from ##STR22## where R.sup.14 is hydrogen or C.sub.1 -C.sub.4 alkyl, A.sup.1 is --O-- or --NR.sup.15 -- where R.sup.15 is hydrogen or a C.sub.1 -C.sub.4 alkyl group or R.sup.15 is a group Q;K.sup.1 is selected from the group consisting of --(CH.sub.2).sub.1 OC(O)--, --(CH).sub.1 C(O)O--, --(CH.sub.2).sub.1 OC(O)O--, --(CH.sub.2).sub.1 NR.sup.16 --, --(CH.sub.2).sub.1 NR.sup.16 C(O)--, --(CH.sub.2).sub.1 C(O)NR.sup.16 --, --(CH.sub.2).sub.1 NR.sup.16 C(O)O--, --(CH.sub.2).sub.1)OC(O)NR.sup.16 --, --(CH.sub.2).sub.1 NR.sup.16 C(O)NR.sup.16 -- (in which the groups R.sup.16 are the same or different), --(CH.sub.2).sub.1 O--, --(CH.sub.2).sub.1 SO.sub.3 --, and a valence bond and l is from 1 to 12 and R.sup.16 is hydrogen or a C.sub.1 -C.sub.4 alkyl group; andQ is selected from the group consisting of straight and branched alkyl, alkoxyalkyl and (oligo-alkoxy)alkyl chain containing 8 to 24 carbon atoms optionally containing one or more carbon-carbon double or triple bonds; and(b) a solvent consisting essentially only of alcohol in which the polymer is dispersed.