Patent ID: 9011980
Filing Date: 2015-04-21
Classification: B32B,C08G,F16F

Abstract:
1. A method of making a dampening device comprising: providing a first layer comprising a sponge rubber; combining an isocyanate-base prepolymer with a polyol base curing agent to form a curable liquid urethane polymer; shredding the curable liquid urethane polymer at a speed of at least about 2,400 rpm, wherein the shredding entrains air in the form of bubbles into the curable liquid urethane polymer; applying the curable liquid urethane polymer to form a second layer overlying a first surface of the first layer; curing the curable liquid urethane polymer of the second layer to form a tacky polyurethane cast elastomer, wherein bubbles remain present in the tacky polyurethane cast elastomer and wherein the curing bonds the first and second layer forming the dampening device.