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US 4,536,537 AGranted
Rubberless high impact polypropylene
AssigneeShell Oil Company
InventorsG. Bruce Klingensmith, Richard O. Whitehead, Thair L. Higgins
Life of this patent
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Abstract
Blends of propylene homopolymers, linear low density ethylene copolymers and certain plasticizer oils possess extremely good impact resistance at low temperatures (-30.degree. C.) along with good stiffness and blush.
Claims8
A polymeric composition having a high level of low temperature impact strength, said composition comprising the blend of:
- (a) 78 to 65 percent by weight of a propylene homopolymer;
- (b) 18 to 25 percent by weight of a linear low density ethylene copolymer;
- and
- (c) 4 to 10 percent by weight of a hydrocarbon plasticizer, said plasticizer being a hydrogenated, highly-branched, dimer of an alpha-olefin containing about 8-12 carbon atoms, and having a viscosity in the range of about 40 to 6.5 centistokes at 38.degree. C.
1 more element
Dependencies are inferred from the claim text.