Disclosed herein is a golf ball comprising one or more fast-chemical-reaction-produced
components, such as a component which comprises a reaction injection molded polyurethane
material. A process of making a golf ball by forming at least one core and/or cover
component of the ball by mixing two or more reactants that react and form a reaction
product with a flex modulus of 1 to 310 kpsi, with a setting time of about 30 seconds
or less, the component having a thickness of at least 0.01 inches and a mold release
time of 2 minutes or less is also disclosed. In one preferred form of the invention,
excess polyurethane from forming golf ball covers is recycled by using it to form
golf ball cores.