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公开(公告)号:US3940245A
公开(公告)日:1976-02-24
申请号:US533828
申请日:1974-12-18
摘要: A gas pressure bonding furnace having a convection shield with (1) monolithic tubular refractory insulation having its upper end surrounding the work receiving hot zone of the furnace and its lower end depending to a cool zone, (2) an impervious tubular metal shell surrounding the tubular insulation and holding it under compression by differential thermal expansion, (3) a cover closing the top of the shell by a gas tight gasket seal and (4) a piston actuated by the gas working pressure to hold the cover closed. In a preferred form, the insulation is cast in the shell and the composition is an alumina cement with embedded alumina balloons.
摘要翻译: 一种具有对流屏蔽的气体压接炉,其具有(1)整体式管状耐火绝缘体,其上端围绕炉的工件接收热区,其下端取决于冷却区,(2)围绕 管状绝缘并通过差热膨胀将其保持在压缩状态,(3)通过气密密封垫圈封闭壳体的顶部的盖子,以及(4)由气体工作压力驱动以将盖子闭合的活塞。 在优选的形式中,绝缘体被浇铸在壳体中,组合物是具有嵌入的氧化铝气球的氧化铝水泥。
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公开(公告)号:US5026818A
公开(公告)日:1991-06-25
申请号:US402665
申请日:1989-09-05
摘要: The invention relates to high molecular weight (co)polyamides and to a process for the accelerated production of polyamides during melt polycondensation using a combination of aminocaprolactam (ACL) and/or lysine components and polycarboxylic acids and known catalysts and also, if desired, for the accelerated solid-phase post-condensation of the catalyst-containing (co)polyamides and to the polyamides produced by the processes.
摘要翻译: 本发明涉及高分子量(共)聚酰胺,以及使用氨基己内酰胺(ACL)和/或赖氨酸组分和多元羧酸和已知催化剂的组合在熔融缩聚期间加速制备聚酰胺的方法,并且如果需要, 催化剂(共)聚酰胺和由该方法生产的聚酰胺的加速固相后冷凝。
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