Patent · US Expired

Moisture-curing polyurethane-based hot-melt compositions

US5091444A · kind A · utility

15Cited by

2References

10Claims

0Family size

Assignee

Bostik, Inc. · US

Inventors

Herbert Bauer · Lutry, CH
Heinz G. Gilch · Bad Homburg vor der Höhe, DE
Walter Rath · Oberursel, DE
Use Schumann · Oberursel, DE

Key dates

Filing date	Feb 12, 1990
Grant date	Feb 25, 1992
Priority date	—
Expiry date	Feb 12, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2666/54
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.