Process for the production of a pulverulent, trick

专利名称：Process for the production of a pulverulent,

tricklable mixture of ethylene/vinyl acetatecopolymer and powdery polyvinylchloride

发明人：Erwin Gubisch,Walter Kudlich,Walter

Popp,Herbert Reinicke

申请号：US05/716106申请日：19760820公开号：US04088625A公开日：19780509

摘要：A process for the production of a pulverulent, tricklable mixture of

ethylene/vinyl acetate copolymer and polyvinylchloride comprising the steps of mixing amixture consisting essentially of (a) an ethylene/vinyl acetate copolymer having anacetate content of from 15% to 75% by weight, (b) powdery polyvinylchloride, in amixture ratio of (a) to (b) of 1:3 to 2:1, and (c) from 0 to 5% by weight of the mixture ofadditives customary for polymer processing, in a high-speed mixture at temperaturesabove the softening temperature of said polyvinylchloride and below 170° C., for a timesufficient to effect homogenization, quenching said homogenized mixture with water andremoving the water, grinding the quenched product with the addition of from 0.5 to 10parts by weight of an inert powder having particles in the submicroscopic range, in a highspeed mill under passage of an airstream which is heated by friction, and recovering saidpulverulent, tricklable mixture; as well as the powdery mixture so produced.

申请人：WACKER CHEMIE GMBH

代理机构：Hammond & Littell

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