P. S. Venkataramani, R. G. Srivastava, S. K. Gupta
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High temperature greases based on polyurea gellants: A review
There is increasing demand for high temperature greases capable of operating in the range of 175–235°C. In this paper, one type of grease, polyurea, is described, and its preparation given, in terms of raw materials, temperature, solvents, base fluids including synthetics, catalysts, additives and thickeners. Two typical preparation procedures are described. The properties of polyurea greases are then reviewed, with detailed tabular matter given.