Polyolefin masterbatch and composition suitable for...

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

2011-08-30

2011-08-30

Nutter, Nathan M (Department: 1765)

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

Synthetic resins

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

C525S232000, C525S240000

Reexamination Certificate

active

08008400

ABSTRACT:
A masterbatch composition comprising (percent by weight): A) 50%-90% of a crystalline polypropylene component comprising: AI) from 25% to 75% of a fraction having a melt flow rate MFRIof from 0.1 to 10 g/10 min.; and AII) from 75% to 25% of a fraction having a melt flow rate value MFRIIequal to or lower than 100 g/10 min.; wherein the ratio MFRI/MFRIIis from 5 to 60; and B) 10%-50% of a copolymer component of ethylene and at least one C3-C10α-olefin, containing from 15% to 50% of ethylene; said masterbatch composition having a value of the intrinsic viscosity [η] of the fraction soluble in xylene at room temperature equal to or higher than 3.5 dl/g, is added to polyolefin materials to obtain final compositions suitable for injection molding.

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