公开(公告)号：US06740752B2

公开(公告)日：2004-05-25

申请号：US10278534

申请日：2002-10-23

申请人： Henryk Struszcyk ,  Antoni Niekraszewicz ,  Magdalena Kucharska ,  Alojzy Urbanowski ,  Maria Wisniewska-Wrona

发明人： Henryk Struszcyk ,  Antoni Niekraszewicz ,  Magdalena Kucharska ,  Alojzy Urbanowski ,  Maria Wisniewska-Wrona

IPC分类号： C08B3708

CPC分类号： C08J3/12 ,  A01N43/16 ,  C08B37/003 ,  C08J2305/08 ,  C08L5/08

摘要： Disclosed is a process for producing particles of the modified carbohydrate polymer chitosan. Such chitosan particles are “activated” as a consequence of the specific steps used in the process. The process involves precipitation of dissolved chitosan from an acid solution thereof by the step-wise addition of neutralizing agent to the solution. A partial neutralization is carried out under shear agitation to form a continuous gel phase having a pH within the range of 5.0 to 6.9. This partially neutralized chitosan gel phase is then further subjected to shear agitation for at least 10 seconds to homogenize the gel phase. The homogenized gel phase is then further neutralized under shear agitation to a pH of above 6.9 to form a gel-like suspension of discrete chitosan particles. Chitosan particles in this form are useful in a number of contexts including, in particular, in the area of plant care.

摘要翻译： 公开了一种生产改性碳水化合物聚合物壳聚糖颗粒的方法。 作为该方法中使用的具体步骤的结果，这种壳聚糖颗粒被“活化”。 该方法包括通过逐步加入中和剂将溶解的壳聚糖从其酸溶液沉淀。 在剪切搅拌下进行部分中和以形成pH在5.0至6.9的范围内的连续凝胶相。 然后将该部分中和的壳聚糖凝胶相进一步进行剪切搅拌至少10秒以使凝胶相均化。 然后将均质化的凝胶相在剪切搅拌下进一步中和至高于6.9的pH以形成离散的壳聚糖颗粒的凝胶状悬浮液。 这种形式的壳聚糖颗粒在许多情况下是有用的，特别是在植物保护领域。