Polymer compositions comprising polyolefins and reaction products of a polyolefin and an unsaturated carboxylic reagent and articles made therefrom
View Patent ↗This invention relates to a polymer composition comprising (A) from about 55% to about 75% by weight of at least one polyolefin, (B) from about 2% to about 12% by weight of at least one reaction product of an alpha, beta unsaturated carboxylic reagent and a polyolefin, and (C) from 15% to about 35% by weight of filler. In one aspect, the polymer compositions also include (D) at least one copolymer of ethylene and an olefin, (E) at least one polyamide, or (F) a mixture of (D) and (E). These compositions provide articles and films with improved scratch resistance and hardness. These compositions have improved processing character because their low coefficient of friction.
1. A polymer composition comprising (A) from about 35% to about 75% by weight of (i) at least one olefin homopolymer or olefin copolymer having a melt flow from about 1 to about 6 and (ii) at least one olefin homopolymer or olefin copolymer having a melt flow from about 8 to about 18, (B) from about 2% to about 12% by weight of at least one reaction product of an alpha, beta unsaturated carboxylic ester, acid, or anhydride and a polyolefin, and (C) from 5% to about 40% by weight of filler, and either (D) from about 1% to about 8% by weight of a copolymer of ethylene and an olefin, or (E) from about 1% to about 8% by weight of at least one polyamide, or (F) mixtures of (D) and (E).
2. The composition of claim 1 wherein the olefin homopolymer or olefin copolymer (A) has from 2 to 8 carbon atoms.
3. The composition of claim 1 wherein the olefin homopolymer or olefin copolymer (A) is selected from the group consisting of ethylene, propylene, and butylene, and combinations thereof.
4. The composition of claim 1 wherein the olefin homopolymer or olefin copolymer (A) is a polypropylene or a polypropylene-ethylene copolymer.
5. The composition of claim 1 wherein the olefin homopolymer or olefin copolymer (A) contains from about 20% to about 50% by weight of (i) and from about 50% to about 80% by weight of (ii).
6. The composition of claim 1 wherein the alpha, beta unsaturated carboxylic ester, acid or anhydride is selected from the group consisting of acrylic acids and esters, methacrylic acids and esters, and maleic acids, esters or anhydride.
7. The composition of claim 1 wherein (B) is a maleated polypropylene or a maleated propylene ethylene copolymer.
8. The composition of claim 1 wherein (B) is an acrylic acid or ester grafted polypropylene or ethylene-propylene copolymer.
9. The composition of claim 1 wherein the filler (C) is calcium carbonate.
10. A polymer composition comprising (A) from about 40% to about 70% by weight of at least one polypropylene or propylene-ethylene copolymer, (B) from about 2% to about 12% by weight of at least one reaction product of (i) an acrylic acid, acrylic ester, maleic acid or maleic anhydride and (ii) a polyolefin, and (C) from 15% to about 35% by weight of filler, and either (D) from about 1% to about 8% by weight of a copolymer of ethylene and an olefin, or (E) from about 1% to about 8% by weight of at least one polyamide, or (F) mixtures of (D) and (E).
11. The composition of claim 10 wherein the polypropylene or propylene-ethylene copolymer has from 2 to 8 carbon atoms.
12. The composition of claim 10 wherein (B) is a maleated polypropylene or a maleated propylene ethylene copolymer.
13. The composition of claim 10 wherein the filler (C) is calcium carbonate.
14. A polymer composition comprising (A) a combination of (i) a polypropylene or propylene copolymer having a melt flow from about 1.5 to about 4 and (ii) a polypropylene or propylene-ethylene copolymer having a melt flow from about 9 to about 14, (B) from about 2% to about 12% by weight of at least one reaction product of an alpha, beta unsaturated carboxylic acid, ester, or anhydride and a polyolefin, and (C) from 5% to about 40% by weight of filler, and either (D) from about 1% to about 8% by weight of a copolymer of ethylene and an olefin having from 6 to 10 carbon atoms, or (E) from about 1% to about 8% by weight of at least one nylon, or (F) mixtures of (D) and (E).
15. The composition of claim 14 wherein (A) has from 2 to 8 carbon atoms.
16. The composition of claim 14 wherein (A) contains from about 20% to about 50% by weight of (i) and from about 50% to about 80% by weight of (ii).
17. The composition of claim 14 wherein the alpha, beta unsaturated carboxylic ester, acid or anhydride is selected from the group consisting of acrylic acids and esters, methacrylic acids and esters, and maleic acids, esters or anhydride.
18. The composition of claim 14 wherein (B) is a maleated polypropylene or a maleated propylene ethylene copolymer.
19. The composition of claim 14 wherein the filler (C) is calcium carbonate.
20. A polymer article prepared from the polymer composition of claim 1 .
21. A polymer article prepared from the polymer composition of claim 10 .
22. A polymer article prepared from the polymer composition of claim 14 .