Non-aqueous, base-degradable polyurethane

Details Non-aqueous, base-degradable polyurethane Non-aqueous, base-degradable polyurethane

1996-05-23

1998-01-13

Niland, Patrick

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, 524589, 528 44, 528 66, 528 76, 528 80, 528 85, C08J 300, C08K 320, C08L 7500, C08G 1800

Patent

active

057080739

ABSTRACT:
The present invention is directed to a non-aqueous, base-degradable polyurethane. The polyurethane is prepared by reacting an organic polyisocyanate with a hydroxyl group containing hydrophilic composition. The hydrophilic composition must have specified amounts of ionic or acidic groups and specific amounts of polyester groups. In a preferred embodiment, the hydrophilic composition also contains polyoxyethylene groups.

REFERENCES:
patent: 4053666 (1977-10-01), Taylor et al.
patent: 4055441 (1977-10-01), Taylor et al.
patent: 4293474 (1981-10-01), Dieterich et al.
patent: 4622360 (1986-11-01), Gomi et al.
patent: 4764553 (1988-08-01), Mosbach et al.
patent: 5126393 (1992-06-01), Blum et al.
patent: 5380779 (1995-01-01), D'Haese

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