Method of preparing water-dispersible poly (urethane-urea)...

Details Method of preparing water-dispersible poly (urethane-urea)... Method of preparing water-dispersible poly (urethane-urea)...

2007-03-20

2007-03-20

Niland, Patrick D. (Department: 1714)

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...

C524S589000, C524S590000, C524S839000, C524S840000, C528S044000, C528S059000, C528S061000, C528S065000, C528S067000, C528S068000, C528S071000, C528S080000, C528S081000, C528S084000, C528S085000

Reexamination Certificate

active

10874327

ABSTRACT:
The present invention relates to a method of preparing water-dispersible poly (urethane-urea) having aliphatic-aromatic isocyanate, more particularly to a method of preparing water-dispersible poly (urethane-urea) having aliphatic-aromatic isocyanate, with improved mechanical/thermal properties, such as heat resistance, chemical resistance and adhesion, good cost competitiveness and environmental friendliness, by reacting polyester polyol, dimethylol propionic acid and an aromatic isocyanate compound to obtain a hydroxyl (OH)-terminated prepolymer, adding an aliphatic isocyanate compound to said OH-terminated prepolymer to obtain an isocyanate (NCO)-terminated prepolymer wherein aromatic-aliphatic isocyanate is hybridized, neutralizing, water-dispersing and chain extending said NCO-terminated prepolymer.

REFERENCES:
patent: 5354807 (1994-10-01), Dochniak
patent: 45-10957 (1970-04-01), None
patent: 39-5989 (1989-04-01), None
patent: 04-328187 (1992-11-01), None
patent: 05-043642 (1993-02-01), None

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