Golf ball adhesion promoter
The present invention is a method for forming a golf ball, the method comprising mixing an aqueous polyurethane dispersion with an azridine to form an aqueous polyurethane dispersion/aziridine mixture. Then, adding the aqueous polyurethane dispersion/aziridine mixture to a water tank, to form a PUD/aziridine solution and dipping a polybutadiene core in the PUD/aziridine solution. The PUD/aziridine solution comprises 0.4 percent aziridine, 4 percent aqueous polyurethane dispersion, and 95.6 percent de-ionized water, which forms a dipped polybutadiene core. The dipped polybutadiene core is then dried at room temperature.
1. A method for forming a golf ball, the method comprising:
mixing an aqueous polyurethane dispersion with an azridine, to form an aqueous polyurethane dispersion/aziridine mixture;
adding the aqueous polyurethane dispersion/aziridine mixture to a water tank, to form a PUD/aziridine solution;
dipping a polybutadiene core in the PUD/aziridine solution, the PUD/aziridine solution comprising 0.4 percent aziridine, 4 percent aqueous polyurethane dispersion, and 95.6 percent de-ionized water, to form a dipped polybutadiene core;
drying the dipped polybutadiene core at room temperature.
2. The method according to claim 1 wherein the polybutadiene core is dipped in the PUD/aziridine solution from 3 to 5 minutes.
3. The method according to claim 2 further comprising air drying the dipped polybutadiene core.
4. The method according to claim 1 further comprising forming a polymeric layer around the polybutadiene core using injection molding.
5. The method according to claim 4 wherein the polybutadiene core is dried for 30 minutes prior to forming a polymeric layer around the polybutadiene core.
6. The method according to claim 4 wherein the polymeric layer is a highly neutralized polymer containing a fatty acid.
7. The method according to claim 4 wherein the polybutadiene core and polymeric layer are post baked for 2 hours at 150° degrees Fahrenheit.
8. The method according to claim 5 wherein a second polymeric layer is formed around the polybutadiene core.