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公开(公告)号:US4804384A
公开(公告)日:1989-02-14
申请号:US36050
申请日:1987-04-08
CPC分类号: D21C9/005 , B27K3/346 , C08H8/00 , B27K3/0214 , B27K3/08
摘要: Reaction of lignocellulosic material with uncatalyzed acetic anhydride in the absence of any cosolvent is disclosed. The process improves dimensional stability and resistance to biological attack of the lignocellulosic material. Lignocellulosic material is treated by exposure to liquid acetic anhydride for at least a short period of time, after which it is then heated to acetylate the material. The excess anhydride and byproduct acetic acid can be removed by vacuum.
摘要翻译: 公开了在没有任何助溶剂的情况下木质纤维素材料与未催化的乙酸酐的反应。 该方法提高了木质纤维素材料的尺寸稳定性和抗生物侵蚀性。 木质纤维素材料通过暴露于液体乙酸酐至少短时间内处理,之后将其加热以使材料乙酰化。 可以通过真空除去过量的酸酐和副产物乙酸。