Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1990-02-12
1992-02-25
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523212, 524590, 524871, 524872, 524873, 524875, C08K 904
Patent
active
050914448
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.
REFERENCES:
patent: 4640950 (1987-02-01), Nishino et al.
patent: 4692479 (1987-09-01), Schneider et al.
Bauer Herbert
Gilch Heinz G.
Rath Walter
Schumann Use
Bostik, Inc.
Cain Edward J.
Conlin David G.
Corless Peter F.
Michl Paul R.
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