Propylene-based polymer composition and foamed article thereof

Details Propylene-based polymer composition and foamed article thereof Propylene-based polymer composition and foamed article thereof

1998-12-10

2000-08-29

Cooney, Jr., John M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521 80, 521142, 525240, 526348, 526351, C08F11006

Patent

active

06110986&

ABSTRACT:
A propylene-based polymer composition obtained by polymerizing a propylene monomer in the presence of a stereoregular olefin polymerization catalyst system in the first stage to produce a crystalline propylene-based polymer(A) having an intrinsic viscosity of 5 dl/g or more, and successively polymerizing a propylene monomer in the second stage to produce a crystalline propylene-based polymer(B) with an intrinsic viscosity of less than 3 dl/g, wherein the content of the (A) is in the range of 0.05% by weight or more and less than 35% by weight in the total of the polymers(A) and (B), and the total of the polymers(A) and (B) has an intrinsic viscosity of less than 3 dl/g and a Mw/Mn of less than 10, and the foamed article thereof.

REFERENCES:
patent: 5134174 (1992-07-01), Xu et al.
patent: 5236962 (1993-08-01), Govoni et al.
patent: 5338764 (1994-08-01), Lesca et al.
patent: 5968994 (1999-10-01), Hashimoto et al.
JP 05239149 930917 (9342)--See abstract (1993).
JP 06093034 940405 (9418)--See abstract (1994).
JP 55123637 800924 (8045)--See abstract (1980).
JP 59172507 840929 (8445)--See abstract (1984).

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