Surface-sealed moldings of cellular polyurethane elastomers and a process for their production
AssigneeBayer Aktiengesellschaft
InventorsHans-Georg Hoppe, Paul Henrichs
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Abstract
The present invention relates to moldings, particularly in the form of cushioning elements, of at least partly open-cell polyurethane elastomers which have a substantially homogeneous density profile and a density of from 0.3 to 0.8 g/cc and which are characterized in that their surface is sealed by a continuous, tight, nonporous skin of polyurethane or polyurethane urea having a thickness of from 0.05 to 1 mm, preferably from 0.1 to 0.5 mm and, with particular preference, from 0.2 to 0.3 mm.
Claims4
A molding of an at least partly open-cell polyurethane elastomer having a substantially homogeneous density profile and a density of from 0.3 to 0.8 g/cc, characterized in that its surface is sealed with a tight, nonporous skin of polyurethane or polyurethane urea having a thickness of from 0.05 to 1 mm.
A cushioning element for a shock-absorbing assembly comprising an at least partly open-cell polyurethane elastomer having a substantially homogeneous density profile and a density of from 0.3 to 0.8 g/cc said elastomer having a surface sealed by a continuous, tight non-porous skin of polyurethane or polyurethane urea said skin having a thickness from 0.05 to 1 mm which skin makes the cushioning element water tight.
Dependencies are inferred from the claim text.