Molded tube of improved performance
AssigneeBecton, Dickinson and Company
InventorsJohn G. McCann, Daniel S. Banner, Louis S. Beres III, Joseph A. Repp, Robert E. Alquesta
Life of this patent
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Abstract
A tube, preferably a centrifuge tube, molded of a blend of 25-35 weight percent of polystyrene and 75-65 weight percent of styrene-butadiene rubber block copolymer has improved performance compared to a tube of pure copolymer.
Claims8
A tube comprising a blend of 25-35 weight percent polystyrene having a melt flow index of 7-11 g/10 min and a styrene-butadiene rubber block copolymer having a melt flow index of 10-12 g/10 min, said tube having diminished leakage or plastic deformation compared to identical tubes of pure styrene-butadiene copolymer.
A centrifuge tube comprising a blend of 28-32 weight percent of polystyrene having a melt flow index of 7-11 g/10 min and 72-68 weight percent of styrene-butadiene rubber block copolymer having a melt flow index of 10-12 g/min, said tube having diminished leakage or plastic deformation compared to n identical tube of pure styrene-butadiene copolymer.
A centrifuge tube comprising a of blend 29.5-30.5 weight percent of polystyrene having a melt flow index of 7-11 g/10 min and 70.5-69.5 weight percent of styrene-butadiene rubber block copolymer having a melt flow index of 10-12 g/10 min, said tube having diminished leakage and plastic deformation compared to an identical tube of pure styrene-butadiene copolymer.
Dependencies are inferred from the claim text.