Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-06-05
2007-06-05
Seidleck, James J. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S191000, C525S243000, C525S322000, C525S323000
Reexamination Certificate
active
10827636
ABSTRACT:
A thermoplastic polyolefin having a melt flow rate of 20 dg/min or higher at 230° C. is produced in reactor without visbreaking. By controlling ratio of the weight average molecular weight of the xylene soluble fraction to the weight average molecular weight of the xylene insoluble fraction, a high melt flow thermoplastic polyolefin can be produced having a good balance of impact and stiffness, tensile elongation at break and gloss properties. Optionally, the ratio of the melt flow rate of the homopolymer phase to the melt flow rate of the total thermoplastic polyolefin can also be controlled. By compounding thermoplastic polyolefins according to the current invention with one or more modifiers, additional compositions can be produced having improved resistance to solvents.
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Kim Se-hyun
Migone Ruben A.
Salek Jeffrey S.
Schnitgen Andrew L.
Asinovsky Olga
Drinker Biddle & Reath LLP
Koons, Jr. Robert A.
McWilliams Matthew P.
Seidleck James J.
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