l hot melt material and methodsUS689096410 Apr 200210 May 2005L&L Products, Inc.Combining a premixed epoxy resin containing an encapsulated solvent foaming agent core with H3PO4, applying to a member such as an automobile frame or body, and softening the capsule to release the foaming agentUS702636726 Sep 200311 Apr 20063M Innovative Properties Companysulfur compounds that generate free radical up