| 摘要 |
<p>A process for protecting manufactured structures or articles of marble, stones, tiles, cement and the like from the action of polluting and atmospheric agents, by applying a perfluoropolyether onto the surface of the manufactured structure or article, characterized in that there is utilized a perfluoropolyether having at one or both its ends functional groups selected from carboxylic, ester or amidic groups.</p> |
