Propylenic resin and blow molded article made therefrom

Details Propylenic resin and blow molded article made therefrom Propylenic resin and blow molded article made therefrom

1998-09-17

2000-08-22

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

26417123, 524291, C08K 551

Patent

active

061073776

ABSTRACT:
A propylene resin composition containing a phenolic antioxidant, and a phosphorus-containing antioxidant which has a differential melt index (.DELTA.MI) calculated from a melt index (MIi) as measured at a propylene temperature of 230.degree. C. and under a load of 2,160 g and a melt index (MIe) as measured at a propylene temperature of 230.degree. C. and under a load of 2,160 g after five repetitions of a 100% recycle test is not greater than 0.5 g/10 min, and MIe is not greater than 1.2 g/10 min. This propylene resin composition enables manufacture of large-sized blow-molded articles featuring light weight, excellent rigidity, dimensional stability, heat resistance and showing good drawdown resistance, suitable for continuous blow molding. Blow moldings are advantageously used as automobile bumpers, bumper beams, or like parts.

REFERENCES:
patent: 4499247 (1985-02-01), Chiba et al.
patent: 4500682 (1985-02-01), Chiba et al.
patent: 5298540 (1994-03-01), Pauquet et al.
patent: 5736613 (1998-04-01), Kijima et al.
patent: 5804623 (1998-09-01), Hoffman et al.
T.J. Henman . . "Melt Stabilization of Polypropylene" --39,45,76-83,92-95-Developments in Polymer Stabilization-1, ed. Gerald Scott, 1979.

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