What is claimed is:
1. A method to prepare a lignin derivative-containing lubricating grease comprising the following steps:
bringing together an amine component with an isocyanate component in a first base oil and converting the same into a polyurea thickener;heating above 120° C. to produce a base grease containing at least a polyurea thickener, comprising...
This patent application is the U.S National stage under U.S.C. 371 of PCT/DE2016/000100 filed Mar. 9, 2016 and designating the United States and claims priority to German Patent Application No.: DE 10 2015 103 440.9 filed Mar. 9, 2015.