Patent ID: 7175915

Claim:
A method of making a polyurethane pad, comprising the steps of preparing a mixture of components for producing a working layer with a quantity of a curing agent sufficient for curing the working layer; removing a part of the quantity of the curing agent from the mixture of the components for the working layer; preparing a mixture of components for producing a polyurethane body with a quantity of a curing agent sufficient for curing the body; removing a part of the quantity of the curing agent from the mixture of the components for the body; preparing a mixture of components for a connection layer including a quantity of a curing agent which is at least equal to the part of the quantity of the curing agent removed from the mixture of the components for the working layer plus the part of the quantity of the curing agent removed from the mixture of the components for the body; and jointly thermally treating the working layer and the body with the connecting layer therebetween, so that the curing agent from the connecting layer migrates into the working layer and into the body to provide in the working layer and in the body the quantity of the curing agent required for curing of the working layer and the body correspondingly.