Abstract:
The present invention is a golf club ( ) having a club head main body ( ) with a hollow interior ( ), a support layer defining a depth of a recess ( ), a polymer insert ( ) in the recess ( ), an isolation layer ( ) and a weight body ( ). The polymer insert ( ) is composed of a thermosetting polyurethane material having a Shore D hardness in the range of 42 to 55, and a Bayshore rebound in the range of 51 to 60. The preferred thermosetting polyurethane material is formed from a p-phenylene diisocyanate prepolymer and a curing agent. The golf club ( ) is preferably a putter, however, it may be a wood or an iron. The particular thermosetting polyurethane provides a soft striking face for feel and a good rebound for distance. The weight body ( ) is preferably composed of a tungsten alloy, and the isolation layer ( ) is preferably composed of a thermoplastic polyurethane.