Coating process

Abstract

A coated object is produced by flame spraying the object with a substantially molten polymeric material which comprises a blend containing polybutylene homopolymer or copolymer, an adhesion promoter and a nucleating agent.

What is claimed is: 
     
       1. A process for coating a solid object with a polymeric material comprising heating a powdered polymeric material comprising a blend of a polybutylene homopolymer or copolymer with an adhesion promoter and a nucleating agent to substantially melt the polymeric material and thereafter propelling the substantially molten polymeric material by flame spraying onto the surface of the solid object, thereby forming a coating, wherein said powdered polymeric material has a particle size from about 20 mesh to about 100 mesh; and wherein the coated solid object has and exhibits improved delamination properties. 
     
     
       2. The process of claim 1 wherein the polybutylene copolymer is a butene-1/ethylene copolymer. 
     
     
       3. The process of claim 2 wherein the copolymer has between about 5 and 25 mole percent ethylene. 
     
     
       4. The process of claim 1 wherein the polybutylene has a melt index of between about 1 and 1000. 
     
     
       5. The process of claim 1 wherein the polybutylene has a melt index of between and about 45 and about 400. 
     
     
       6. The process of claim 1 wherein the adhesion promoter is ethylene methacrylic acid copolymer. 
     
     
       7. The process of claim 1 wherein the adhesion promoter is ethylene vinyl acetate copolymer. 
     
     
       8. The process of claim 1 wherein the adhesion promoter is present at from about 1 to about 35 percent by weight. 
     
     
       9. The process of claim 1 wherein the adhesion promoter is present at from about 5 to about 15 percent by weight. 
     
     
       10. The process of claim 1 wherein the adhesion promoter is present at about 10 percent by weight. 
     
     
       11. The process of claim 1 wherein the nucleating agent is high density polyethylene. 
     
     
       12. The process of claim 1 wherein the nucleating agent is zinc oxide. 
     
     
       13. The process of claim 1 wherein the substrate is heated to above 20020 F. before coating. 
     
     
       14. The process of claim 1 wherein the substrate is heated to above 225° F. before coating.