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公开(公告)号:US5382650A
公开(公告)日:1995-01-17
申请号:US170477
申请日:1993-12-20
CPC分类号: C08G63/826 , C08G63/82
摘要: Novel catalysts for polyester production by esterification and/or transesterification are MoS.sub.2 or WS.sub.2 which have been intercalated by alkali metals cations, especially lithium cations, and then contacted with an alcohol or a polyol, a preferred polyol being a glycol which is one of the monomeric units in the polyester produced.
摘要翻译: 通过酯化和/或酯交换的聚酯生产的新型催化剂是由碱金属阳离子,特别是锂阳离子插入的MoS2或WS2,然后与醇或多元醇接触,优选的多元醇是作为单体 单位在聚酯生产。
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公开(公告)号:US5356666A
公开(公告)日:1994-10-18
申请号:US28671
申请日:1993-03-09
IPC分类号: C08J3/00 , C08G69/32 , C08G69/46 , C08G69/48 , C08J3/20 , C08J5/18 , C08J7/06 , C08K3/10 , C08L77/00 , C08L77/10 , D01F11/04 , B05D1/00
CPC分类号: C08J7/06 , C08G69/46 , C08J2377/10
摘要: Disclosed herein is a process for reducing the flammability of aramids by contacting a solvent swollen or never dried aramid with an aqueous solution of a tungsten compound, removing the solvent from, and then drying the aramid. The resulting aramids have superior Limiting Oxygen Indices, making them particularly useful where lower flammability is desired, as in firefighters' overcoats.
摘要翻译: 本文公开了一种通过使溶剂溶胀或从未干燥的芳族聚酰胺与钨化合物的水溶液接触,除去溶剂,然后干燥芳族聚酰胺来降低芳族聚酰胺的可燃性的方法。 所得的芳族聚酰胺具有优异的限制性氧指数,使其在需要较低的可燃性时特别有用,如消防员的外衣。
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