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US 2009/0023824 A1Published application
Thermally expansible material substantially free of tackifier
OwnerFrank Hoefflin, Herbert Ackermann +3inventors
InventorsFrank Hoefflin, Herbert Ackermann, Paul T. Engel, John L. Hanley, IV, Jean-Claude Rudolf
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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.
Claims20
A thermally expansible material comprising:
- a) at least one activated thermoplastic polymer, wherein the at least one activated thermoplastic polymer comprises an anhydride-functionalized thermoplastic polymer;
- b) an amine-functionalized curing agent;
- and
- c) a blowing agent.
1 more element
Dependencies are inferred from the claim text.