Polyolefin masterbatch and composition suitable for...

Details Polyolefin masterbatch and composition suitable for... Polyolefin masterbatch and composition suitable for...

2005-03-22

2010-06-01

Zemel, Irina S (Department: 1796)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S053000, C525S240000

Reexamination Certificate

active

07728077

ABSTRACT:
A masterbatch composition comprising (percent by weight): A) 15%-50% of a polypropylene component having a melt flow rate of from 1 to 250 g/10 min.; and B) 50%-85% of an olefin polymer partially soluble in xylene at room temperature, containing from 60% to 85% by weight of ethylene; said masterbatch composition having (i) a value of the intrinsic viscosity [η] of the fraction soluble in xylene at room temperature ([η]sol) equal to or lower than 2.9 dl/g, and (ii) a value of the ratio MFR/[η], , , , equal to or lower than 4, is added to polyolefin materials to obtain final compositions suitable for injection molding.

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