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Nanocomposite Barrier Coatings for Elastomeric Applications

  • H.A. Goldberg (a1), C.A. Feeney (a1), D.P. Karim (a1) and M. Farrell (a1)


InMat LLC has developed aqueous, non-hazardous nanocomposite dispersions with a unique combination of barrier properties and flexibility. Using butyl rubber as the matrix, and very high aspect ratio vermiculite filler, flexible coatings with gas permeability 30-300 times lower than butyl rubber have been produced.[1,2] These coatings have been shown to be undamaged by strains up to 20%. The first commercial application of this technology (sold under InMat's trademark Air D-FenseTM) is in Wilson's new, longer life, Double CoreTM tennis ball.



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[1] Feeney, C.A., et al, Barrier Coating of an Elastomer and a Dispersed Layered Filled in a Liquid Carrier, US Patent 6,087,016; July 11, 2000. PCT Filed 6/98.
[2] Feeney, C.A., et al., Barrier Coating of an Elastomer and a Dispersed Layered Filled in a Liquid Carrier and Coated Articles, US Patent 6,232,389; May 15, 2001.
[3] Usuki, A., Tukigase, A., Kato, M.; “Preparation and properties of EPDM-clay hybrids”, Polymer 43; p 21852189; 2002.10.1016/S0032-3861(02)00013-7
[4] , Elspass, Chester, W. et al; “Tactoidal Elastomer Nanocomposites"; U.S. Patent 5,807,629; September 15, 1998.
[5] Kojima, Y. et al, “Gas permeabilities in rubber-clay hybrid”, Journal of Material Science Letters 12, p889890, (1993).10.1007/BF00455608
[6] Cussler, E.L., Hughes, S. E., Ward, W. J., Rutherford, A.; “Barrier Membranes”; Journal of Membrane Science, 38; p 161174; 1988.10.1016/S0376-7388(00)80877-7
[7] Ward, W.J, Gaines, G.L., Alger, M.M., Stanley, T.J; “Gas barrier improvement using vermiculite and mica in polymer films”; Journal of Membrane Science 55, p 173180, 1991.10.1016/S0376-7388(00)82333-9
[8] Goldberg, H.A. et al, “Elastomeric Barrier Coatings for Sporting Goods”, ACS 161st Spring Technical Meeting, Rubber Division, Paper No. 17, to be presented April 29, 2002.


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