公开(公告)号：US20110160347A1

公开(公告)日：2011-06-30

申请号：US12979593

申请日：2010-12-28

申请人： Roger BERGMAN ,  Liang Hong ,  Linda Kim-Habermehl ,  Mladen Ladika

发明人： Roger BERGMAN ,  Liang Hong ,  Linda Kim-Habermehl ,  Mladen Ladika

IPC分类号： C08L13/00 ,  C08K5/17 ,  C08K5/3415 ,  C08K5/36 ,  C08K5/09

CPC分类号： C08F2/20 ,  C04B24/2623 ,  C04B40/0042 ,  C04B2103/0057 ,  C04B2103/0066 ,  C08F2/22 ,  C08F4/40 ,  C08F212/08 ,  C08F236/10 ,  C08F222/02 ,  C04B2103/0086

摘要： A water redispersible polymer powder may be produced by drying an aqueous mixture of a water insoluble film-forming polymer and a colloidal stabilizer comprising a chelating agent to obtain a water redispersible polymer powder, where the amount of chelating agent is at least 0.1% by weight, preferably at least 1% by weight, most preferably at least 3% by weight, based upon the weight of the water insoluble film-forming polymer. Dispersions or polymer compositions containing a chelating agent as a colloidal stabilizer exhibit an unexpectedly low viscosity which facilitates spray drying and permits use of high solids content dispersions with low pressure spray drying to increase production efficiency. The chelating agents are stable at high pH and so high pH spray dryable compositions containing them as a colloidal stabilizer may sit or be stored for prolonged periods of time prior to spray drying without loss of effectiveness of the colloidal stabilizer.

摘要翻译： 水可再分散性聚合物粉末可以通过干燥水不溶性成膜聚合物和包含螯合剂的胶体稳定剂的水性混合物来制备，得到水分散性聚合物粉末，其中螯合剂的量为至少0.1重量％ ，优选至少1重量％，最优选至少3重量％，基于水不溶性成膜聚合物的重量。 含有螯合剂作为胶体稳定剂的分散体或聚合物组合物表现出意想不到的低粘度，这有助于喷雾干燥，并允许使用高固体含量的分散体用低压喷雾干燥来提高生产效率。 螯合剂在高pH下是稳定的，因此含有它们作为胶态稳定剂的高pH喷雾可干燥组合物可以在喷雾干燥之前长时间保存或保存，而不损失胶体稳定剂的有效性。