公开(公告)号：US3676378A

公开(公告)日：1972-07-11

申请号：US3676378D

申请日：1970-03-25

Applicant: BASF AG

Inventor： HEIL EDUARD ,  TRIESCHMANN HANS-GEORG ,  WILLERSINN HERBERT ,  BOLTE HERBERT ,  BRONSTERT KLAUS

IPC: B29C44/34 ,  C08J9/16 ,  C08F47/10 ,  C08F33/02

CPC classification number: B29C44/461 ,  B29C44/3442 ,  C08J9/16

Abstract: Continuous production of styrene polymers which contain an expanding agent and which are in the form of granules by extrusion of a mixture of a melt of the polymer with the expanding agent and rapid cooling of the extruded mixture, wherein excess expanding agent is first mixed with the melt and then the excess of expanding agent is evaporated. In this way both the production of a homogeneous mixture and the cooling of the mixture prior to extrusion to temperatures just above the softening point of the mixture are facilitated.

Abstract translation: 连续生产含有发泡剂的苯乙烯聚合物，并且通过将聚合物的熔体与发泡剂的混合物挤出并挤出混合物的快速冷却而形成颗粒形式，其中过量的膨胀剂首先与 熔化，然后蒸发过量的发泡剂。 以这种方式，促进均匀混合物的生产和在挤出之前将混合物冷却至刚好高于混合物的软化点的温度。