公开(公告)号：US3983080A

公开(公告)日：1976-09-28

申请号：US508024

申请日：1974-09-20

申请人： Kyung W. Suh ,  Richard E. Skochdopole ,  Malcolm E. Leduc

发明人： Kyung W. Suh ,  Richard E. Skochdopole ,  Malcolm E. Leduc

IPC分类号： C08J9/14 ,  C08J9/18

CPC分类号： C08J9/143 ,  C08J2327/08 ,  Y10S521/91

摘要： This invention is directed to a process for forming stable, low density, fine celled extruded foam from normally crystalline vinylidene chloride polymers such process comprising (1) forming an admixture of a normally crystalline vinylidene chloride polymer in powder form with a blowing agent composed of a compound or mixture of compounds having a boiling point of less than about 40.degree.C, a vapor pressure at the foaming temperature used of greater than atmospheric pressure and less than about 1000 p.s.i. and a solubility parameter of greater than about 6.6 and less than about 8.7, then (2) extrusion foaming the admixture using an extrusion temperature of from about 120.degree.C to about 150.degree.C.

摘要翻译： 本发明涉及从通常结晶的偏二氯乙烯聚合物形成稳定的低密度细孔挤出泡沫的方法，该方法包括（1）形成粉末状的正常结晶偏二氯乙烯聚合物与发泡剂的混合物，所述发泡剂由 沸点小于约40℃的化合物或化合物的混合物，使用的发泡温度的蒸气压大于大气压，小于约1000psi 和大于约6.6且小于约8.7的溶解度参数，然后（2）使用约120℃至约150℃的挤出温度将混合物挤出发泡。