Additive for tail seal grease and tail seal grease used in shield tunneling machine

摘要

An additive having a retardation effect and high waterproof, which is excellent in flammability and can be added to tail seal grease to prevent adhesion of backing material even if the backfill material flows into a brush type tail seal. It is intended to provide tail seal grease having oil separation resistance and fire resistance.Flammable effect and inorganic compound having depression retardation and / or organic compound having flammable effect and setting delay (however, the compounds having a chain of carboxylic carboxylic acids and cyclic alcohols, two or more hydroxyl groups, and compounds having hydroxyl groups and carboxyl groups are excluded.It is the additive for tail seal grease of shield tunneling machine.Further, the tail seal grease having the oil separation resistance and the endurance resistance while maintaining the high stopping water quality by containing the additive and reducing the content of the lubricating oil base oil.