Propylene random copolymer and film laminate thereof

Details Propylene random copolymer and film laminate thereof Propylene random copolymer and film laminate thereof

1997-02-18

1998-11-03

Wu, David W.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

428516, 428523, B32B 2708, B32B 2732

Patent

active

058309683

ABSTRACT:
A propylene random copolymer and a film laminate thereof is described having excellent blocking resistance and transparency and substantially maintaining favorable low-temperature heat-sealing properties after corona discharge treatment. The propylene random copolymer of the invention includes a propylene component and an .alpha.-olefin component having 4 to 10 carbon atoms, wherein the content of the .alpha.-olefin component is in the range of about 6% to about 40% by weight, the intrinsic viscosity 0.45 dl/g and not higher than about 5.0 dl/g, and the melting point (Tm) measured by a differential scanning calorimeter and the content of 20.degree. C. xylene soluble fraction (CSX) fulfill a relationship of

REFERENCES:
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patent: 5206324 (1993-04-01), Asanuma et al.
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patent: 5266641 (1993-11-01), Asanuma et al.
Fierro et al., `Syndioselective Propylene Polymerization Catalyzed by rac-2,2-Dimethylpropylidne (1-.eta..sup.5 -cyclopentadienyl) (1-.eta..sup.5 -fluorenyl)dichlorozirconium`, Jour. or Polymer Science Part A: Polymer Chemistry Edition 32(1994) Mar., No. 4, New York.

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