Compositions of polypropylene and polyamide
AssigneeExxonMobil Chemical Patents Inc.
InventorsJean-Roch Schauder, Guy Joseph Wouters, Sudhin Datta
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Abstract
The invention relates to thermoplastic compositions in which (A) an isotactic polypropylene, optionally containing comonomer, with a melting point of at least 110° C. and (B) a polyamide, (A) and (B) constituting at least 70 wt %, are blended with (C) at least 2 wt % of a grafted functionalized propylene-based elastomer having isotactic crystallinity and containing at least 0.25 wt % of MAH-derived units based on the total weight of (C). Optionally (D) an ungrafted polyolefin may be added with a melting point of less than 100° C., (C) and (D) combined being at least 8 wt % and the wt % of (A), (B), (C) and (D) being calculated on the basis of the total polymer weight of the thermoplastic composition.
Claims16
A polymer composition comprising:
- a. at least 60 wt % of an isotactic polypropylene having a melting point of at least 110° C.;
- b. at least 10 wt % of a polyamide;
- and
- c. at least 2% by weight of a grafted propylene-based elastomer having a heat of fusion of less than 40 J/g and a melting point of less than 110° C., wherein the grafted propylene-based elastomer comprises at least 0.25 wt % maleic anhydride-derived units;
- wherein the isotactic polypropylene provides a matrix into which the polyamide and the grafted propylene-based elastomer are dispersed.
A polymer composition comprising:
- a. at least 10 wt % of an isotactic polypropylene having a melting point of at least 110° C.;
- b. at least 60 wt % of a polyamide;
- and
- c. at least 2% by weight of a grafted propylene-based elastomer having a heat of fusion of less than 40 J/g and a melting point of less than 110° C., wherein the grafted propylene-based elastomer comprises at least 0.25 wt % maleic anhydride-derived units;
- wherein the polyamide provides a matrix into which the polyamide and the grafted propylene-based elastomer are dispersed.
Dependencies are inferred from the claim text.