公开(公告)号：US4480090A

公开(公告)日：1984-10-30

申请号：US544187

申请日：1983-10-21

申请人： Chung-Ming Kuo ,  Alan P. Leonard

发明人： Chung-Ming Kuo ,  Alan P. Leonard

IPC分类号： C08B3/02

CPC分类号： C08B3/02

摘要： The present invention relates to a method of preparing lower fatty acid esters of cellulose which comprises esterifying at a temperature of between about 75.degree. C. and about 110.degree. C. a cellulose compound having esterifiable hydroxyl groups with an esterifying bath comprising an organic acid anhydride, a diluent, and a catalyst comprising from 0.2 to 2.0 parts phosphoric acid, from 0.1 to 1.2 parts sulfuric acid, and from 0.05 to 0.6 parts of a hindered aliphatic alcohol by weight per 100 parts of the cellulose to be esterified.

摘要翻译： 本发明涉及一种制备纤维素的低级脂肪酸酯的方法，其包括在约75℃至约110℃的温度下酯化具有可酯化羟基的纤维素化合物与含有机酸酐的酯化浴 ，稀释剂和催化剂，其包含0.2至2.0份磷酸，0.1至1.2份硫酸和0.05至0.6份受阻脂肪醇，每100份待酯化的纤维素。

公开(公告)号：US4547329A

公开(公告)日：1985-10-15

申请号：US547309

申请日：1983-10-31

申请人： John R. Dombroski ,  J. Maynard Hawkins ,  Mark A. Pollock ,  Alan P. Leonard ,  Thomas A. Mitchell

发明人： John R. Dombroski ,  J. Maynard Hawkins ,  Mark A. Pollock ,  Alan P. Leonard ,  Thomas A. Mitchell

IPC分类号： B29B9/06 ,  C08J3/12 ,  D01F6/14

CPC分类号： C08J3/12 ,  B29B9/06 ,  B29K2029/00 ,  C08J2329/04

摘要： Disclosed is a process for the formation of olefin-vinyl alcohol copolymer pellets which comprises mixing particles of the copolymer with water to obtain a wet cake containing about 20-70% solids by weight to thereby obtain a plasticized mass of the copolymer, thereafter extruding the copolymer at a temperature of about 5.degree.-7.degree. C. below the melting point of the mass through a nozzle to form a rod, and dividing the rod into individual pellets.

摘要翻译： 公开了一种形成烯烃 - 乙烯醇共聚物颗粒的方法，其包括将共聚物的颗粒与水混合以获得含有约20-70重量％固体的湿滤饼，从而获得共聚物的增塑体，然后挤出 共聚物在约5℃-7℃的温度下低于质量的熔点通过喷嘴形成棒，并将棒分成单独的颗粒。