| 摘要 |
PURPOSE:To obtain a rubber compsn. which utilizes used tires, etc., without detriment to the breaking characteristics by compounding a raw rubber with specified amts. of a solftener and a reclaimed rubber having a specified toluene- sol. content. CONSTITUTION:This rubber compsn. is prepd. by compounding 100 pts.wt. raw rubber (e.g. a synthetic rubber) with 15 pts.wt. or higher softener (e.g. an arom. oil) and 30 pts.wt. or higher reclaimed rubber having toluene-sol. content of 25% or higher. This reclaimed rubber having such a toluene-sol. content is produced by any generally known method, such as the oil pan method or the reclamator method. and by prolonging the desulfurization time, by elevating the desulfurization temp., or by increasing the desulfurization concn. The compsn. may contain a carbon black, an antioxidant, a vulcanizing agent, etc., in addition to the softener and the reclaimed rubber. |
