C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 9/14 (2006.01) A01K 1/00 (2006.01) C08J 9/12 (2006.01) E04B 1/62 (2006.01) E04B 2/00 (2006.01) E04B 5/00 (2006.01)
Patent
CA 2089255
2089255 9203496 PCTABS00011 The invention is a plastic foam body comprising a foamed thermoplastic polymer having a plurality of closed non-interconnecting cells, a minimum cross-sectional dimension of at least 30 mm, and a water vapor permeability not greater than 1.8 perm inches as measured by ASTM Method C355-64 Procedures for Desiccant method, said foam body being without discontinuities and substantial variation in average cell size when cell size is measured by averaging cell diameter across the minimum cross-sectional dimension of the body by ASTM method D2842-69, further characterized in that the foam body has a density, d, of 40 kg/m3 or greater, cell dimensions of 1.0 mm or greater in the first direction, V, 1.0 mm or greater in the second direction, E, and 0.9 mm in the third direction, H, and a resistance factor, R, of 600 or greater as calculated by formula (1).
Smart & Biggar
The Dow Chemical Company
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