公开(公告)号：US3755500A

公开(公告)日：1973-08-28

申请号：US3755500D

申请日：1970-01-22

申请人： ICI LTD

发明人： CLARK K

IPC分类号： C08F4/00 ,  C08F4/60 ,  C08F10/00 ,  C08F10/14 ,  C08F255/08 ,  C08F297/00 ,  C08F297/08 ,  C08L23/20 ,  C08F15/04

CPC分类号： C08F10/14 ,  C08F10/00 ,  C08F255/08 ,  C08L23/20 ,  C08F210/00 ,  C08L2666/04 ,  C08F4/00

摘要： A POLYMERIC COMPOSITION OF 4-METHYL PENTENE-1 HAVING DISPERSED THROUGH IT A SMALL PROPORTION OF POLYMERIZED UNITS OF AN ALIPHATIC OLEFIN, THE HOMOPOLYMER OF SAID ALIPHATIC OLEFIN HAVING A MELTING POINT ABOVE 275*C., PREFERABLY ABOVE 320*C. THE COMPOSITION MAY ALSO INCLUDE UNITS OF A LINEAR 1-OLEFIN HAVING 4 TO 18 CARBON ATOMS. THE COMPOSITION IS PREPARED BY SEQUENTIAL POLYMERIZATION OF 4-METHYL PENTENE-1 AND THE ALIPHATIC OLEFIN. THE COMPOSITION MAY BE MOULDED INTO ARTICLES HAVING A MEAN SPHERULITE SIZE OF LESS THAN 5 MICRONS, WHICH, IF THE POLYMER HAS A LOW ASH CONTENT, MAY HAVE A LIGHT TRANSMISSION OF 1/8" SECTION OF AT LEAST 90%.