| abstract |
The invention relates to a thickener, by which a grease with excellent durability under high temperature and high speed conditions can be produced, a grease containing the thickener, a method for producing the thickener and the grease and a grease-lubricated bearing. A grease (7) to be introduced into a bearing (1) is obtained by adding a thickener for a grease having a compound shown by the chemical formula (1) given below or a compound represented by the following chemical formula (2), comprises: In the chemical formula (1) or the chemical formula (2), R 1 represents a diamine residue or a diisocyanate residue; R 2 is a radical of a dicarboxylic acid, wherein two adjacent carbon atoms form an imide ring, or residues of a derivative of the dicarboxylic acid; R 3 is a tetracarboxylic acid residue or residues of derivatives of the tetracarboxylic acid; R 4 is a hydrogen atom, a monoamine residue or a monoisocyanate residue; and n for integers from 0 to 5. |