If your viscosity estimate is correct, 100,000 poise is effectively a solid.  So, I must assume that your material is a natural or synthetic rubber.  In which case, about the only type of mixer is a sigma blade mixer for rubber compounding.  The size will dictate the power requirement, but it will be high for the volume.  Power input will increase temperature and reduce the viscosity.

The answers by this expert are based on the best available interpretation of the information provided.  The consequences of the application of this information are the responsibility of the user.  If clarification is needed, please submit a further question.