公开(公告)号：US5233022A

公开(公告)日：1993-08-03

申请号：US749751

申请日：1991-08-26

申请人： Joseph T. Donatti ,  Robert P. Cavender ,  Robert J. Stein ,  James Carter

发明人： Joseph T. Donatti ,  Robert P. Cavender ,  Robert J. Stein ,  James Carter

IPC分类号： C08F6/26 ,  C08J3/20

CPC分类号： C08J3/20 ,  C08F6/26 ,  C08J2327/06

摘要： A method of cooling a PVC dry blend powder in a vessel by spraying a liquified inert gas into the vessel such that the liquified inert gas contacts the powder. The PVC dry blend powder is made by mixing a powdered PVC resin with ingredients selected from the group consisting of plasticizers, stabilizers, and pigments in a mixing vessel by using a heating and mixing cycle followed by a liquified inert gas cooling cycle. The flow properties of PVC dry blend powder made by this method have an improved shelf life.

摘要翻译： 通过将液化的惰性气体喷射到容器中使得液体惰性气体与粉末接触来冷却容器中的PVC干混粉末的方法。 通过使用加热和混合循环，随后是液化的惰性气体冷却循环，将粉末状PVC树脂与选自增塑剂，稳定剂和颜料的成分混合在混合容器中来制备PVC干混粉末。 通过该方法制备的PVC干混粉末的流动性能具有改善的保质期。