Abstract: A thermally expansible material includes at least one activated thermoplastic polymer, an amine-functionalized curing agent, and a blowing agent. The at least one activated thermoplastic polymer includes an anhydride functionalized thermoplastic polymer. The expansible material is substantially free of a tackifier, and the material is adhereable to a substrate during expansion. A baffling material following expansion is also provided.

Abstract: An expandable insert and a method of making the same are disclosed. An expandable insert may generally include an expandable body that extends along a hollow structure, and has a continuous outer periphery. A passageway extends through the outer periphery that allows fluid communication therethrough. The expandable insert is operable to be expanded to fill a cross-section of the hollow structure. A method of forming an expandable insert may generally include forming an expandable body, including forming a continuous outer periphery and a passageway extending through the outer periphery to allow fluid communication therethrough. The method may further include expanding the elongated body to fill a cross-section of the hollow structure.

Abstract: An expansion temperature tolerant, dry, expandable sealant and baffle is provided which is capable of undergoing a desired degree of full expansion when an automobile body containing the sealant and baffle product is conveyed through a conventional bake and/or curing oven. The sealant and baffle product is fully expandable over a wider temperature and time range than heretofore available expandable baffle products. The composition for preparation of a molded expandable sealant and baffle component includes a grafted anhydride polymer, an epoxide terminated additive polymer which are capable of reacting with the grafted anhydride polymer and a blowing agent.

Abstract: An expansion temperature tolerant, dry, expandable sealant and baffle is provided which is capable of undergoing a desired degree of full expansion when an automobile body containing the sealant and baffle product is conveyed through a conventional bake and/or curing oven. The sealant and baffle product is fully expandable over a wider temperature and time range than heretofore available expandable baffle products. The composition for preparation of a molded expandable sealant and baffle component includes a grafted anhydride polymer, an epoxide terminated additive polymer which are capable of reacting with the grafted anhydride polymer and a blowing agent.