Functional fusing agent

A process for improving adhesion to a fused print substrate and for improving fuser oil release life which comprises (i) generating an electrostatic latent image on an imaging member;

• (ii) developing the latent image by contacting the imaging member with a developer;
• (iii) transferring the developed image to a copy substrate;
• and (iv) affixing the developed image to the copy substrate by contacting the developed image with a fuser member comprising a substrate, a layer thereover comprising a polymer, and, on the polymeric layer, a coating of a release agent comprising a mixture of (a) an organosiloxane polymer concentrate containing amino-substituted or mercapto-substituted organosiloxane polymers, wherein there are amino or mercapto functional groups on at least some of the polymer molecules of the concentrate, said concentrate having a degree of functionality of from about 0.2 to about 5 mole percent, said concentrate having a viscosity of from about 50 to about 500 centistokes;
• and (b) a nonfunctional organosiloxane polymer diluent, said diluent having a viscosity of from about 100 to about 2,000 centistokes;
• said mixture having a degree of functionality of from about 0.05 to about 0.4 mole percent, wherein the mixture has a viscosity of from about 100 to about 1,000 centistokes, and wherein the ratio by weight of concentrate to diluent is from about 1:2 to about 1:30.

A process for simultaneously obtaining acceptable adhesion to a fused print substrate and obtaining acceptable fuser oil release life which comprises (i) generating an electrostatic latent image on an imaging member, (ii) developing the latent image by contacting the imaging member with a developer;

• (iii) transferring the developed image to a copy substrate;
• and (iv) affixing the developed image to the copy substrate by contacting the developed image with a fuser member comprising a substrate, a layer thereover comprising a polymer, and, on the polymeric layer, a coating of a release agent comprising a mixture of (a) an organosiloxane polymer concentrate containing amino-substituted or mercapto-substituted organosiloxane polymers, wherein there are amino or mercapto functional groups on at least some of the polymer molecules of the concentrate, said concentrate having a degree of functionality of from about 0.2 to about 5 mole percent, said concentrate having a viscosity of from about 50 to about 500 centistokes;
• and (b) a nonfunctional organosiloxane polymer diluent, said diluent having a viscosity of from about 100 to about 2,000 centistokes;
• said mixture having a degree of functionality of from about 0.05 to about 0.4 mole percent, wherein the mixture has a viscosity of from about 100 to about 1,000 centistokes, and wherein the ratio by weight of concentrate to diluent is from about 1:2 to about 1:30.