| 摘要 |
<p>In the Specifications of published International Application WO 91/19,589 there is described a method of securing against lateral motion two bodies held in face to face asperity contact, thereby to make a joint between the two bodies, in which there is inserted into the interface between the two bodies a material - a galling agent, gall promoter, gall enhancer, or anti-lubricant - that on minimal initial lateral relative motion of the two surfaces promotes rapid but controllable 'galling' between the two surfaces, this galling binding the surfaces against further such motion. The preferred described anti-lubricants are said generally to be liquid, and while these have proved satisfactory, nevertheless there are occasions where they are somewhat too fluid (surface active), and tend to creep or even to flow out from their application site. The present invention proposes dealing with this by providing the anti-lubricant in the form of a composition that is a viscous fluid, a paste, a gel or even a semi-solid rubber-like material. More specifically, the invention suggests the use as the anti-lubricant of a composition of two or more siloxanes chemically reacted together to form a desirably thick viscous fluid, paste, gel or rubbery solid reaction product, the resultant reaction product being admixed with a more liquid, mobile siloxane that itself has anti-lubricant properties, this more mobile siloxane, which may be either one of the two reacted together or a completely different one, is immobilised - stably dispersed - within the reaction product (and not only provides the required anti-lubricant property but may also be used to modify the final 'viscosity' of the composition).</p> |
