Polyketone polymer blends

Abstract

Improved compositions with a good balance of properties comprise polymer blends of a linear alternating polyketone polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon with a cracked polyolefin polymer. The cracked polyolefin polymer is preferably a cracked polypropylene or polybutylene polymer.

What is claimed is: 
     
       1. A polymer blend comprising a major proportion of a linear alternating polyketone polymer and from about 0.5 wt % to about 25 wt %, based on total blend, of a cracked polypropylene polymer which exhibits a melt flow index of at least about 20 grams/10 minutes. 
     
     
       2. The composition of claim 1 wherein the polyketone polymer is represented by repeating formula ##STR2## wherein G is a monomer of an ethylenically unsaturated hydrocarbon of at least 3 carbon atoms polymerized through the ethylenic unsaturation and the ratio of y:x is no more than about 0.5. 
     
     
       3. The composition of claim 2 wherein G is a monomer of propylene and the ratio of y:x is from about 0.01 to about 0.1. 
     
     
       4. The composition of claim 3 wherein the cracked polypropylene comprises from about 1 wt % to about 20 wt % of the total blend. 
     
     
       5. The composition of claim 2 wherein y is zero. 
     
     
       6. The composition of claim 5 wherein the cracked polypropylene comprises from about 1 wt % to about 20 wt % of the total blend. 
     
     
       7. The composition comprising a blend of: a linear alternating polyketone polymer, wherein the linear alternating polymer is represented by the repeating formula ##STR3## wherein G is a moiety of an ethylenically unsaturated hydrocarbon of at least 3 carbon atoms polymerized through the ethylenic unsaturation and the ratio of y:x is no more than about 0.5; and   from about 1 wt % to about 20 wt %, based on the total blend, of a cracked polypropylene polymer which exhibits a melt flow index of at least about 20 grams/10 minutes.   
     
     
       8. The composition of claim 7 wherein the cracked polypropylene comprises from about 1 wt % to about 15 wt % of the total blend. 
     
     
       9. An article manufactured from the composition of claim 7. 
     
     
       10. The composition of claim 7 wherein y is zero. 
     
     
       11. The composition of claim 10 wherein the cracked polypropylene comprises from about 1 wt % to about 15 wt % of the total blend. 
     
     
       12. A polymer blend comprising a major proportion of a cracked polyolefin polymer which exhibits a metal flow index of at least about 20 grams/10 minutes and from about 5 wt % to about 15 wt %, based on total blend, of a linear alternating polypropylene polymer. 
     
     
       13. An article manufactured from the composition of claim 12. 
     
     
       14. The composition of claim 12 wherein the polyketone polymer is represented by the repeating formula ##STR4## wherein G is a monomer of an ethylenically unsaturated hydrocarbon of at least 3 carbon atoms polymerized trough the ethylenic unsaturation and the ratio of y:x is no more than about 0.5. 
     
     
       15. The composition of claim 14 wherein G is a monomer of propylene and the ratio of y:x is from about 0.01 to about 0.1. 
     
     
       16. The composition of claim 15 wherein the cracked polyolefin polymer is a cracked polypropylene polymer or a cracked polybutylene polymer. 
     
     
       17. The composition of claim 14 wherein y is zero. 
     
     
       18. The composition of claim 17 wherein the cracked polyolefin polymer is a cracked polypropylene polymer or a cracked polybutylene polymer.