Polymer blend

Abstract

Blends of (a) a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and (b) a maleated polyolefin polymer exhibit improved properties of thermal stability, impact resistance as better processability.

What is claimed is: 
     
       1. A composition comprising a non-miscible blend of, as a major component, a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, and, as a minor component, a maleated polyolefin polymer. 
     
     
       2. The composition of claim 1 wherein the linear alternating polymer is represented by the repeating formula   --CO--CH.sub.2 --CH.sub.2)].sub.x [CO--G)].sub.y     wherein G is the moiety of 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 the polyolefin polymer of the maleated polyolefin polymer is a polyolefin polymer wherein the olefin has up to 4 carbon atoms inclusive. 
     
     
       4. The composition of claim 3 wherein the maleated polyolefin polymer is present in a quantity from about 0.5% by weight to about 40% by weight based on total blend, said maleated polyolefin having from about 1% by weight to about 20% by weight, based on maleated polyolefin polymer, of maleic acid compound moieties. 
     
     
       5. The composition of claim 3 wherein y is zero. 
     
     
       6. The composition of claim 3 wherein G is a moiety of propylene. 
     
     
       7. The composition of claim 6 wherein the polyolefin polymer of the maleated polyolefin polymer is polypropylene, polybutene or copolymer of propylene or butene with up to about 12% by mol of ethylene. 
     
     
       8. The composition of claim 7 wherein the maleated polyolefin polymer is present in a quantity of from about 0.5% by weight to about 40% by weight, based on total blend. 
     
     
       9. The composition of claim 8 wherein the ratio of y:x is from about 0.01 to about 0.1. 
     
     
       10. The composition of claim 9 wherein the maleated polyolefin polymer has from about 0.1% by weight to about 20% by weight, based on maleated polyolefin polymer, of maleic acid compound moieties. 
     
     
       11. The composition of claim 11 wherein the maleated polyolefin polymer is maleated polypropylene. 
     
     
       12. The composition of claim 10 wherein the maleated polyolefin polymer is maleated polyisobutylene. 
     
     
       13. The composition of claim 12 wherein the linear alternating polymer has an LVN, measures in m-cresol at 60° C., of from about 1.8 to about 15. 
     
     
       14. The composition of claim 13 wherein said LVN is about 2.75 to about 4.