| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing holding a foamed solid lubricant sealed therein which is excellent in lubricant retentivity, has a long life, can be operated even at a high speed rotation, can be made in relatively simple processes, can respond to the demand of cost reduction, and is excellent in heat resistance and durability. SOLUTION: This bearing holding a foamed solid lubricant enclosed therein in which a foamed solid lubricant 37 is sealed in a bearing 31 is characterized in that the foamed solid lubricant 37 is produced by foaming and curing a mixture comprising a lubricating component, a liquid rubber whose polymer main chain comprises a hydrocarbon and which has hydroxyl groups at a hydroxyl group value of 25 to 110 mgKOH/g at the terminals of the main chain, a curing agent comprising an organic compound having isocyanate groups in the molecule, and the foaming agent; the equivalent ratio (OH/NCO) of the hydroxyl groups contained in the liquid rubber/the isocyanate groups contained in the curing agent is 1/(1.0 to 2.0); and the lubricating component and the liquid rubber are contained in amounts of 40 to 80 wt.% and 5 to 45 wt%, respectively, based on the total amount of the mixture. COPYRIGHT: (C)2009,JPO&INPIT |
