high viscosity -- fast drain

This seems like a contradictory requirement to me..how about vibration or centrifugal force to help dripping?

Del,

There's no contradiction to be found, which cannot be met, given enough force.....

- Y

Most such additives do indeed work by viscosity changes. One thing that should work for you is to induce a lot of small air bubbles to the liquid when you are ready to discharge. This will greatly reduce the viscosity and aid discharge. Vacuum de-aereate after discharge to return the liquid to its original state, w/o a chemical change. Otherwise, your liquid will run off the glove molds faster and create voids and thin spots, plus require multiple dips, if you tamper with the internal viscosity.

add a thixotropic agent.

This is a shear dependance of viscosity. So your dipping fluid is thinner to start, but as it runs off quickly the layer gets thinner and thinner and the velocity(shear) falls and a structure emerges and it is a gel like solid. There are specialists in thixotrop(h)y, search for them

I have read recently an internet page about "Tom Effect" which describes the effect of long chain stretchy polymer molecules on the flow of fluids . This additive increase the speed of flow of fluids having high viscosity . Do you know about it ?

I have added regular bleach to increase the speed of water draining off a product. I dont know what effect it make have on gloves or the chemical your currently using.