Aqueous polyurethane dispersions and adhesives based thereon

Details Aqueous polyurethane dispersions and adhesives based thereon Aqueous polyurethane dispersions and adhesives based thereon

1993-04-07

1996-02-27

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524539, 524839, 524840, C08J 300, C08K 320, C08L 7500

Patent

active

054949602

ABSTRACT:
Aqueous polyurethane dispersions used in adhesives for manufacturing laminate structures are provided with improved dispersion properties, which provide improved shelf-life stability of the dispersion and greater transparency and handling characteristics in application machinery for adhesives formulated therefrom, when a tertiary amine is present during an initial polyurethane prepolymer reaction between an isocyanate and a polyol component having acid functional groups. The initial reaction is carried out prior to formation of the dispersion in water.

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"Two New Isocyanates For The Polyurethane Industry", Journal of Cellular Plastics, Nov./Dec. 1982 Arendt et al.

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