Bostik, Inc.

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Heinz G Gilch

Herbert Bauer

Walter Rath

A moisture-curing hot-melt composition comprising at least one isocyanate-terminated polyurethane prepolymer has improved sag-resistance while retaining high extrudability and is characterised in that the composition includes 1-17 wt %, preferably 3-6 wt %, of hydrophobic, siloxane-coated, fumed silica. Especially effective polyurethane hot-melt adhesive compositions are prepared containing 4-5 wt % of the hydrophobic, siloxane-coated fumed silica.

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Oberursel, Germany

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