Patent ID: 8082842

Claim:
An offset printing apparatus for transferring a phase change ink onto a print medium comprising: a) a phase change ink component for applying a phase change ink to form a phase change ink image; b) an imaging member for accepting said phase change ink image from said phase change ink component, and transferring the phase change ink image from said imaging member to said print medium, the imaging member comprising: i) an imaging substrate, and thereover ii) an outer layer; and iii) a release agent material coating, wherein the release agent material coating comprises a perfluorinated polyether having a skeleton selected from the group consisting of Formulas I and II, and mixtures thereof: CF 3 —(CF 2 CF 2 ) m —O—(R 1 R 2 O)—(R 3 R 3 O) n —(R 3 O) p —(CF 2 ) q —CF 3 Formula I wherein R 1 is selected from the group consisting of CF 2 , CF—CF 3 , and —NR 4 R 5 ; R 2 is selected from the group consisting of CF 2 , CF—CF 3 , and —NR 4 R 5 ; R 3 is selected from the group consisting of CF 2 and CF 3 ; R 4 is selected from the group consisting of hydrogen, alkyl group having from about 1 to about 18 carbon atoms, arylalkyl group having from about 7 to about 18 carbon atoms, mercapto, hydride and carbinol functional group; R 5 is selected from the group consisting of alkyl having from about 1 to about 20 carbons, and a fluoroalkyl having from about 2 to about 10 carbons; m is a number of 0 or 1; n is a number of from about 0 to about 500; p is a number of from about 0 to about 100; q is a number of 0 or 1; and p+n is a number of from about 100 to about 500; and R 1 —(CF 2 CF 2 ) m —O—(R 2 R 2 O) n —(R 2 O) p —(CF 2 ) q —CF 2 —R 1 Formula II wherein R 1 is CF 3 ; R 2 is selected from the group consisting of CF 2 and CF—CF 3 ; m is a number of 0 or 1; n is a number of from about 0 to about 500; p is a number of from about 0 to about 100; q is a number of 0 or 1; and p+n is a number of from about 100 to about 500.