| 摘要 |
<p>A method of renovating an existing pipeline comprises spray-coating the interior of the pipeline using a two part coating system of which the two parts are mixed at the time of application. One part of the system comprises a polyisocyanate whilst the second part comprises one or more oligomeric polyamines, optionally further blended with a secondary aliphatic polyamine, or the second part comprises one or more aromatic polyamines blended with one or more polyols. The mixture forms a coating on the interior surface of the pipeline and forms, at a high cure rate, a monolithic flexible lining which exhibits high strength and a high level of adhesion to the pipe wall.</p> |
