公开(公告)号：US08048967B2

公开(公告)日：2011-11-01

申请号：US12269428

申请日：2008-11-12

申请人： Aihua Pei ,  Tingxiu Xie ,  Guisheng Yang

发明人： Aihua Pei ,  Tingxiu Xie ,  Guisheng Yang

IPC分类号： C08F297/02 ,  C08G69/18

CPC分类号： C08G69/18 ,  Y02P20/582 ,  Y10T428/2982

摘要： A method for preparing nylon microspheres is provided, said method comprising steps (1), (2) and (3) or steps (1′), (2) and (3) as follows: (1) a radically polymerizable monomer is dispersed in a molten lactam monomer, and a free radical initiator is added, so that radical polymerization of the radically polymerizable monomer is carried out, to give a mixture of a free radical polymer and the lactam monomer; or (1′) a mixture of a free radical polymer and a molten lactam monomer is provided; and (2) an initiator and an activator, used for anionic ring-opening polymerization of the lactam monomer, are added to the mixture obtained in step (1) wherein the remaining radically polymerizable monomer and water are removed, or to the mixture obtained in step (1′), so that the anionic ring-opening polymerization of the lactam is carried out to give a polymer alloy of the free radical polymer/polyamide; and (3) the free radical polymer in the polymer alloy obtained in step (2) is removed by dissolution, giving nylon microspheres. Nylon microspheres are also provided, wherein the weight average molecular weight of the nylon lies in the range of 10000-300000, and the particle size of the nylon microspheres lies in the range of 0.1-500 μm.

摘要翻译： 提供了制备尼龙微球的方法，所述方法包括如下步骤（1），（2）和（3）或（3）或（1），（2）和（3）：（1）可自由基聚合的单体分散 在熔融的内酰胺单体中加入自由基引发剂，进行自由基聚合性单体的自由基聚合，得到自由基聚合物与内酰胺单体的混合物; 或（1'）提供自由基聚合物和熔融内酰胺单体的混合物; 和（2）将用于内酰胺单体的阴离子开环聚合的引发剂和活化剂加入到步骤（1）中获得的混合物中，其中剩余的可自由基聚合的单体和水被除去，或者加入到 步骤（1'），使得内酰胺的阴离子开环聚合进行，得到自由基聚合物/聚酰胺的聚合物合金; 和（3）通过溶解除去步骤（2）中获得的聚合物合金中的自由基聚合物，得到尼龙微球。 还提供了尼龙微球，其中尼龙的重均分子量在10000-300000的范围内，尼龙微球的粒度在0.1-500μm的范围内。