Compositions of polypropylene and polyamide
AssigneeExxonMobil Chemical Patents Inc.
InventorsJean-Roch Schauder, Guy 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.
Claims64
A thermoplastic composition comprising:
- (A) an isotactic polypropylene having a melting point of at least 110° C.;
- (B) a polyamide;
- (C) at least 2% by weight, based on the total polymer weight of the thermoplastic composition, of a grafted functionalized propylene-based elastomer having isotactic crystallinity and containing at least 0.25% by weight, based on the total weight of the propylene-based elastomer, of maleic anhydride-derived units;
- and optionally
- (D) an ungrafted polyolefin having a melting point of less than 100° C.;
- wherein the combined wt % of (A) and (B) is at least 70%, based on the total polymer weight of the thermoplastic composition, and the combined wt % of (C) and (D) is at least 8% based on the total polymer weight of the thermoplastic composition.
18 A molded article made from the thermoplastic composition of claim 1.
A thermoplastic composition comprising:
- (A) at least 60% by weight, based on the total polymer weight of the thermoplastic composition, of an isotactic polypropylene having a melting point of at least 110° C.;
- (B) at least 10% by weight, based on the total polymer weight of the thermoplastic composition, of a polyamide;
- (C) at least 2% by weight, based on the total polymer weight of the thermoplastic composition, of a grafted functionalized propylene-based elastomer having isotactic crystallinity and containing at least 0.25% by weight, based on the total weight of the propylene-based elastomer, of maleic anhydride-derived units;
- and optionally
- (D) an ungrafted polyolefin having a melting point of less than 100° C.;
- wherein the combined wt % of (C) and (D) is at least 8% by weight, based on the total polymer weight of the thermoplastic composition;
- the thermoplastic composition has a matrix formed by the isotactic polypropylene (A);
- and the thermoplastic composition has a Flexural modulus of from 800 to 1600 MPa.
A thermoplastic composition comprising:
- (A) at least 10% by weight, based on the total polymer weight of the thermoplastic composition, of an isotactic polypropylene having a melting point of at least 110° C.;
- (B) at least 60% by weight, based on the total polymer weight of the thermoplastic composition, of a polyamide;
- (C) at least 2% by weight, based on the total polymer weight of the thermoplastic composition, of a grafted functionalized propylene-based elastomer having isotactic crystallinity and containing at least 0.25% by weight, based on the total weight of the propylene-based elastomer, of maleic anhydride-derived units;
- and optionally
- (D) an ungrafted polyolefin having a melting point of less than 100° C.;
- wherein the combined wt % of (C) and (D) is at least 8% by weight, based on the total polymer weight of the thermoplastic composition;
- the thermoplastic composition has a matrix formed by the polyamide (B);
- and the thermoplastic composition has a Flexural modulus of from 1200 to 2000 MPa.
Dependencies are inferred from the claim text.