Aqueous polyurethane dispersions

Details Aqueous polyurethane dispersions Aqueous polyurethane dispersions

1978-02-06

1980-01-15

Lieberman, Allan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 292N, 528 61, 528 65, C08J 302, C08L 7504

Patent

active

041838360

ABSTRACT:
A water-based polyurethane dispersion is prepared by mixing an aliphatic diisocyanate with three critical active hydrogen compounds, to form a prepolymer containing carboxyl groups and free isocyanate groups, then dispersing the prepolymer in an aqueous medium containing a tertiary amine, which converts the carboxyl groups to carboxylate ions, and a diamine, which chain-extends the prepolymer through its --NCO groups. These aqueous dispersions are storage-stable for at least several months and are useful in many coating applications, among others, for coating textile materials.

REFERENCES:
patent: 3412054 (1968-11-01), Milligan et al.
patent: 3988278 (1976-10-01), Bartizal
patent: 3997491 (1976-12-01), Matsuda et al.

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