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AssigneeHuels Aktiengesellschaft
InventorsRainer Gras, Felix Schmitt, Elmar Wolf
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The invention relates to cold-curing, low-solvent or solvent-free 2-component polyurethane/polyurea compositions comprising a reaction product of: a) a diamine of the following composition ##STR1## where R is a linear, branched or cyclic alkylene radical having 2-16 carbon atoms which may be optionally substituted by C.sub.1 -C.sub.4 alkyl, wherein in said alkylene radical 1-3 CH.sub.2 groups may optionally be replaced by ##STR2## groups; and b) one or more NCO prepolymers prepared from reaction of one or more linear, branched or cyclic aliphatic isocyanates and one or more branched polyetherpolyols or polyesterpolyols, wherein the NCO prepolymer has an NCO functionality .gtoreq.2; wherein reactants a) and b) are reacted in an NCO:NH equivalent ratio of (1.5-1):1 and their use as coatings and reaction coating materials.
A cold-curing 2-component polyurethane/polyurea composition having a solvent content of at most 20% by weight comprising a reaction product consisting essentially of a diamine component (a) and an NCO prepolymer component (b), wherein
A cold-curing 2-component polyurethane/polyurea composition having a solvent content of at most 20% by weight comprising a reaction product consisting essentially of a diamine component (a) and an NCO prepolymer component (b) wherein
A cold-curing 2-component polyurethane/polyurea composition having a solvent content of at most 20% by weight comprising a reaction product consisting essentially of a diamine component (a) and an NCO prepolymer component (b) wherein
In a cold-curing 2-component polyurethane/polyurea composition having a solvent content of at most 20% by weight comprising a reaction product consisting essentially of
Dependencies are inferred from the claim text.
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Processes: prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
Polyamines: acyclic
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
Term ended 5 Oct 2014 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to light-fast, cold-curing, low-solvent or solvent-free two-component polyurethane/polyurea compositions (PUR/PU compositions) comprising disecondary diamines and (cyclo)aliphatic NCO prepolymers which are useful for coatings, sealing compositions, casting compositions, reaction coating materials and adhesives.
2. Discussion of the Background
Experimental Section
A.1 Preparation of amine component A1
A two stage process was used to prepare amine component A1, wherein in the 1st stage ethylenediamine and diisopropyl ketone were heated in a molar ratio of 1:2 in the presence of 1% by weight of an acidic ion exchanger for about 24 h. Subsequently, the aqueous and the organic phases were separated. In order to remove residual water, the organic phase was heated at 100.degree. C. and 0.1 mbar until no further water was evolved.