Patent ID: 7329695
Filing Date: 2008-02-12
Classification: C09D,G02B

Abstract:
1. An ink for pad printing a medical device comprising: from about 1% and 59% by weight of water; from about 0.5% to about 8% by weight of a colorant; and from about 1% to about 75% by weight of a binder polymer, wherein the binder polymer is a crosslinkable, water-soluble poly(vinyl alcohol) having olefinically unsaturated radicals, provided that the ink does not include a crosslinker to crosslink two or more monomers or polymer molecules, wherein the ink has a viscosity of greater than 100 centipoise, wherein the ink without crosslinker has good adhesion to a medical device, wherein the water-soluble poly(vinyl alcohol) is a crosslinkable polymer based on a polyhydroxyl compound which is a derivative of a poly(vinyl alcohol) having a molecular weight of at least about 2000 which comprises from about 0.5 to about 80%, based on the number of hydroxyl groups in the poly(vinyl alcohol), of units of the formula I, I and II, I and III, or I and II and III in which R is alkylene having up to 12 carbon atoms, R 1 is hydrogen or lower alkyl, R 2 is an olefinically unsaturated, electron-withdrawing, crosslinkable radical, preferably having up to 25 carbon atoms, and R 3 is hydrogen, a C 1 -C 6 alkyl group or a cycloalkyl group, wherein R and R 3 are as defined for formula I above, and R 7 is a primary, secondary or tertiary amino group or a quaternary amino group of the formula N + (R′) 3 X − , in which each R′, independently of the others, is hydrogen or a C 1 -C 4 alkyl radical and X is a counter ion, in which R and R 3 are as defined for formula I above, and R 8 is the radical of a monobasic, dibasic or tribasic, saturated or unsaturated, aliphatic or aromatic organic acid or sulfonic acid.