Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-06-14
2005-06-14
Robertson, Jeffrey B. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S131000, C525S408000, C525S411000, C525S439000, C528S076000, C528S080000, C528S083000
Reexamination Certificate
active
06906148
ABSTRACT:
The present invention relates to compositions comprising reaction products of a polyisocyanate with a polyester block copolymer and a process for the preparation thereof. These are suitable as a moisture-curing hot melt adhesive. The hot melt adhesive composition may optionally also comprise a reaction product of a polyisocyanate with a polyester polyol and/or a reaction product of a polyisocyanate with a polyether polyol. Such polyurethane hot melt adhesive compositions have good creep resistance and interfacial adhesion values on plastics and show very high strength values.
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Huber et al., “Shaping Reactive Hotmelts Using LMW Copolyesters”, Adhesive Age, pp. 32-35 (1987).
Brenger Andreas
Krebs Michael
Lohr Christoph
Scheffler Ingolf
Harper Stephen D.
Henkel Kommanditgesellschaft auf Aktien
Robertson Jeffrey B.
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