公开(公告)号：US3514501A

公开(公告)日：1970-05-26

申请号：US3514501D

申请日：1967-01-09

Applicant: DART IND INC

Inventor： LEIBSON IRVING ,  ERCHAK MICHAEL JR

IPC: C08F297/08 ,  C08F15/04

CPC classification number: C08F297/08 ,  B01J2219/182 ,  Y10S525/91 ,  Y10S526/904

公开(公告)号：US3702352A

公开(公告)日：1972-11-07

申请号：US3702352D

申请日：1970-11-16

Applicant: DART IND INC

Inventor： LEIBSON IRVING

IPC: C08F297/08 ,  C08F15/04

CPC classification number: C08F297/08

Abstract: NOVEL COMPOSITIONS OF BLOCK COPOLYMERS OF ALPHAOLEFINS AND PROCESSES THEREFOR WHICH COMPOSITIONS HAVE IMPROVED CONTACT CLARITY WHEN MOLDED OVER COMPOSITIONS OF THE PRIOR ART PROCESSES. THE COMPOSITIONS COMPRISE

(A) 80% TO 95% BY WEIGHT OF A PRE-SEGMENT CONSISTING ESSENTIALLY OF A RANDOM COPOLYMER OF (1) 90-98.5 MOLE PERCENT OF AN ALPHA-OLEFIN HAVING 2 TO 9 CARBON ATOMS AND (2) 1.5-10 MOLE PERCENT OF AN ALPHAOLEFIN HAVING 2 TO 9 CARBON ATOMS DIFFERENT FROM (1), (B) 5% TO 20% BY WEIGHT OF A POST-SEGMENT CONSISTING ESSENTIALLY OF A HOMOPOLYMER OF AN ALPHA-OLEFIN HAVING 2 TO 9 CARBON ATOMS WHICH IS THE SAME AS (A) (1).