| 摘要 |
<p>1342013 Reclaiming rubber UNIROYAL Inc 19 April 1971 [4 May 1970] 9908/71 Heading C3E Scrap vulcanized rubber is reclaimed by heating at #300‹ F. in the presence of at least 0À2% by wt. of formaldehyde, paraformaldehyde, methylal, chloral, trimethylolphenol or trimethylolacetaldehyde and at least 0À001% by wt. of resorcinol, phloroglucinol, resorcinolformaldehyde condensate, resorcinol-acetaldehyde condensate or resorcinol-acetone condensate from 100-300 parts by wt. of water per 100 parts of scrap may also be present.</p> |
