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PPG Patents Multi-Layer Aircraft Adhesive

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

U.S. 8,551,620 B2
PPG Industries Ohio, Inc. has received a patent for a multi-layer aircraft adhesive composition comprised of (a) a first layer prepared from a first composition comprised of a Part A and a Part B, wherein Part A is comprised of a plasticizer, a crosslinking agent, and an adhesion promoter, wherein Part B is comprised of a moisture resister and an abrasion resister, and wherein the first layer is substantially sulfide free; and (b) a second layer directly or indirectly formed over at least a portion of the first layer, the second layer prepared from a second composition comprised of a Part C and a Part D, wherein Part C is comprised of: (i) at least one polythiol functional polymer, (ii) at least one epoxy resin, (iii) at least one sulfur containing material that is different from the at least one polythiol functional polymer, (iv) at least one plasticizer, and (v) at least one filler, wherein Part D is comprised of: (i) at least one plasticizer, (ii) at least one of manganese dioxide or lead oxide, and (iii) at least one alkaline agent.

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