| 摘要 |
<p>The aqueous cement impregnating e.g. glass fibers, contains both a latex (includes synthetic rubber suspensions) and a phenolic resin, at least partly in the form of phenolate. An Independent claim is included for the corresponding clutch lining. Preferred features: A strong base is added to the impregnation cement mixture before or after adding phenolic resin. The strong base proportion is 6-15 or preferably 8-15 wt%, with respect to the phenolic resin. The strong base comprises (caustic) potash or soda. To make the cement a premix is formed, including fillers, phenolic resin, the strong base and water. The latex is then added. The latex comprises styrene butadiene rubber (SBR) or acrylonitrile butadiene rubber (NBR). The pH of the cement is 9-10. Textured glass fiber is used, its size being 600-5000 tex. The fiber is metallic.</p> |
