Control golf ball-DDH steel control

Abstract

A golf ball with a conventional core covered with a polymer blend of at least two copolymers. The first blend polymer having a melt index of about 2 to 10 grams/10 min, a flexural modulus of 60,000 to 80,000 PSI, a shore D hardness of about 60 to 70; and the second blend copolymer having a melt index of about 0.2 to 2 grams/10 minutes, a flexural modulus of 2,000 to 8,000 PSI. The cover has dimples arranged in a pattern according to a dodecahedron, which is also arranged to coincide with pentagons, triangles and rows. In one embodiment the cover has 360 dimples of three different diameters and that optionally have a dual radius. Optionally the dimples are arranged to provide ten great circles free of dimples.

What we claim is:  
     
         1 . A golf ball comprising: 
 a core;    a cover disposed over said core, wherein said core is a blend of polymers comprising: 
 a first polymer having a melt index of about 2 to 10 grams/10 min, a flexural modulus of 60,000 to 80,000 PSI, a shore D hardness of about 60 to 70; and,  
 a second polymer having a melt index of about 0.2 to 2, a flexural modulus of 2,000 to 8,000 PSI;  
   a plurality of dimples arranged to coincide with a modified dodecahedron pattern on said cover.    
     
     
         2 . The golf ball of  claim 1  wherein said first polymer is an olefin/unsaturated carboxylic acid copolymer.  
     
     
         3 . The golf ball of  claim 2  wherein said second polymer is an olefin/unsaturated carboxylic acid/n-butyl acrylate copolymer.  
     
     
         4 . The golf ball of  claim 3  wherein said first polymer is an ethylene/methacrylic acid copolymer having about 17% to 21% by weight of said methacrylic acid.  
     
     
         5 . The golf ball of  claim 4  wherein said second polymer is an ethylene/methacrylic acid/n-butyl acrylate copolymer having about 10% to 14% by weight of methacrylic acid.  
     
     
         6 . The golf ball of  claim 5  wherein said dimples are arranged to coincide with a plurality of pentagons, wherein said pentagons are formed from said dodecahedron pattern.  
     
     
         7 . The golf ball of  claim 6  wherein said dimples are arranged to coincide with a plurality of triangles, wherein said triangles further subdivide said pentagons.  
     
     
         8 . The golf ball of  claim 7  wherein said dimples are arranged to coincide with a plurality of rows, wherein said rows further subdivide said triangles  
     
     
         9 . The golf ball of  claim 8  wherein said rows comprise: 
 a first row wherein said row is adjacent to an apex of said triangle;  
 a second row adjacent to said first row;  
 a third row adjacent to said second row wherein said second row lies between said first road and said third row.  
 
     
     
         10 . The golf ball of  claim 9  wherein said dimples further comprise: 
 a first dimple arranged to coincide with said first row;  
 a second dimple arranged to coincide with said second row and said third row; and,  
 a third dimple arranged to coincide with said third row.  
 
     
     
         11 . The golf ball of  claim 10  wherein said dimples have a dual radius.  
     
     
         12 . The golf ball of  claim 10  wherein said dimples have a depth of 0.005 to 0.007 inches.  
     
     
         13 . The golf ball of  10  wherein said first dimple has a diameter of 0.10 to 0.13 inches, wherein said second dimple has a diameter of 0.15 to 0.16 inches, and said third dimple 0.13 to 0.15 inches.  
     
     
         14 . The golf ball of  claim 13  wherein said golf ball has 360 dimples.  
     
     
         15 . The golf ball of  claim 8  wherein said dimples are arranged to provide ten uninterrupted great circles paths free of dimples.  
     
     
         16 . The golf ball of  claim 11  wherein said dual radius dimples comprise a first radius of about 0.5 to 0.9 inches and a second radius of about 0.9 to 1.3 inches.  
     
     
         17 . The golf ball of  16  wherein said first polymer comprises 30% to 90% by weight and said second polymer 10% to 50% by weight of said cover.  
     
     
         18 . A golf ball comprising: 
 a core;    a cover blend comprising: 
 a first polymer comprising an ethylene/methacrylic copolymer having 19% by weight of acid, a melt index of about 2 to 10 grams/10 min, a flexural modulus of 60,000 to 80,000 PSI, a shore D hardness of about 60 to 70; and,  
 a second polymer comprising an ethylene/methacrylic acid/n-butyl acrylate copolymer having a melt index of about 0.2 to 2 grams/10 minutes, a flexural modulus of 2,000 to 8,000 PSI;  
   a plurality of dimples arranged on said cover according to a modified dodecahedron pattern;    a plurality of pentagons, wherein said pentagons subdivide said dodecahedron pattern;    a plurality of triangles, wherein said triangles subdivide said pentagons;    a plurality of rows, wherein said rows subdivide said triangles.    
     
     
         19 . The golf ball of  claim 18  further comprising: 
 a first row wherein said row is adjacent to an apex of said triangle;  
 a second row adjacent to said first row;  
 a third row adjacent to said second row wherein said second row lies between said first road and said third row.  
 
     
     
         20 . The golf ball of  claim 19  further comprising: 
 a first dimple arranged to coincide with said first row;  
 a second dimple arranged to coincide with said second row and said third row; and,  
 a third dimple arranged to coincide with said third row.  
 
     
     
         21 . The golf ball of  claim 20  wherein said dimples form ten great circle paths free of dimples and wherein said dimples have a dual radius, wherein said dual radius dimples comprise a first radius of about 0.5 to 0.9 inches and a second radius of about 0.9 to 1.3 inches.  
     
     
         22 . The golf ball of  claim 21  wherein said cover has 360 dimples and wherein  
     
     
         23 . The golf ball of  claim 22  wherein said first dimple has a diameter of 0.10 to 0.13 inches, wherein said second dimple has a diameter of 0.15 to 0.16 inches, and said third dimple 0.13 to 0.15 inches.  
     
     
         24 . A golf ball comprising: 
 a core;    a cover blend comprising: 
 a first polymer comprising an ethylene/methacrylic copolymer having 19% by weight of acid, a melt index of about 2 to 10 grams/10 min, a flexural modulus of 60,000 to 80,000 PSI, a shore D hardness of about 60 to 70; and,  
 a second polymer comprising an ethylene/methacrylic acid/n-butyl acrylate copolymer having a melt index of about 0.2 to 2 grams/10 minutes, a flexural modulus of 2,000 to 8,000 PSI;  
   at least 360 dimples arranged on said cover according to a dodecahedron pattern wherein said dimples form ten great circle paths free of said dimples;    a plurality of pentagons, wherein said pentagons subdivide said dodecahedron pattern;    a plurality of triangles, wherein said triangles subdivide said pentagons;    a plurality of rows, wherein said rows subdivide said triangles, wherein said rows comprise: 
 a first row wherein said row is adjacent to an apex of said triangle;  
 a second row adjacent to said first row;  
 a third row adjacent to said second row wherein said second row lies between said first road and said third row;  
   a first dimple arranged to coincide with said first row;    a second dimple arranged to coincide with said second row and said third row; and,    a third dimple arranged to coincide with said third row.