Block copolymer composition containing polypropylene and polybutene
AssigneeShell Oil Company
InventorsCharles Chiu-Hsiung Hwo, Michael John Modic, Mark Leonid Kasakevich
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Abstract
The present invention relates to the addition of a poly-1-butene to a mixture of a styrene-diene block copolymer, a polypropylene homo(co)polymer, oil, and optionally a metallocene-made polyethylene and/or filler such as talc, to make a mixture suitable for making automotive parts, household goods, sporting goods, etc.
Claims7
A polymeric composition consisting of:
- (i) from about 10.0 wt % to about 60.0 wt % of a block copolymer of monoalkenyl aromatic hydrocarbon and conjugated diene,
- (ii) from about 5.0 to about 20.0 wt % of a polypropylene,
- (iii) from about 30.0 wt % to about 50.0 wt % of a paraffinic oil, and
- (iv) from about 2.0 to about 25.0 wt % of a poly-1-butene polymer having a melt index of from about 0.1 to about 200 as determined by ASTM D-1238 Condition E at 190.degree. C.
An auto part made from a polymeric composition consisting of from about 40.0 to about 45.0 wt % of a block copolymer of monoalkenyl aromatic hydrocarbon and conjugated diene, from about 6 to about 9 wt % of polypropylene polymer, from about 40.0 to about 45.0 wt % of paraffinic oil, from about 6.0 to about 9.0 wt % of poly-1-butene having a melt index of from about 0.1 to about 5 dg/min. as determined by ASTM D-1238 Condition E at 190.degree. C.
A polymeric composition consisting of:
- (i) from about 10.0 wt % to about 60.0 wt % of a block copolymer of monoalkenyl aromatic hydrocarbon and conjugated diene,
- (ii) from about 5.0 to about 20.0 wt % of a polypropylene,
- (iii) from about 30.0 wt % to about 50.0 wt % of a paraffinic oil,
- (iv) from about 2.0 to about 25.0 wt % of a poly-1-butene polymer having a melt index of from about 0.1 to about 200 as determined by ASTM D-1238 Condition E at 190.degree. C., and
- (v) from about 0 wt % to about 15.0 wt % of a polyethylene made by a metallocene catalyst, and
- (vi) from about 0 wt % to about 50.0 wt % of talc.
Dependencies are inferred from the claim text.