Catalyst dip

1. A method for forming a golf ball, the method comprising:

mixing a polyisocyanate crosslinker with a base thermoplastic polyurethane cover material to form an injection molding material, wherein the polyisocyanate crosslinker is aliphatic, miscible with the base thermoplastic polyurethane cover material and has functionalities greater than or equal to two;

injection molding a golf ball cover from the injection molding material;

dipping the golf ball in a catalyst solution, wherein the catalyst solution is allowed to absorb into a cover of the golf ball; and

heating the golf ball to allow continued diffusion of the catalyst solution into the cover of the golf ball.

2. The method according to claim 1 wherein the polyisocyanate crosslinker is added in a masterbatch form and dry blended with the base thermoplastic polyurethane cover material before injection molding.

3. The method according to claim 2 wherein the masterbatch is made on a twin screw extruder and the thermoplastic polyurethane cover material is used as a carrier resin.

4. The method according to claim 1 wherein the catalyst solution comprises an organometallic compound.

5. A method for forming a golf ball, the method comprising:

mixing a polyisocyanate crosslinker with a base thermoplastic polyurethane cover material to form an injection molding material during an injection molding of a golf ball cover, wherein the polyisocyanate crosslinker is aliphatic, miscible with the base thermoplastic polyurethane cover material and has functionalities greater than or equal to two;

dipping the golf ball in a catalyst solution, wherein the catalyst solution is allowed to absorb into the golf ball cover; and

heating the golf ball to allow continued diffusion of the catalyst solution into the golf ball cover.