Water soluble polymer additives for polyurethane-based pressure

Details Water soluble polymer additives for polyurethane-based pressure Water soluble polymer additives for polyurethane-based pressure

1994-01-13

1998-02-03

Gorr, Rachel

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525453, C08L 7500

Patent

active

057145431

ABSTRACT:
In accordance with the present invention novel polyurethane PSAs containing water soluble polymer additives have enhanced water uptake. The water soluble polymer additives suitable for use herein have a solubility parameter in poorly hydrogen-binding solvents (e.g., hexane, cyclohexane and the like) in the range of from 8-10. The water soluble polymers must also be free from moieties which will react with isocyanates. Such PSAs retain their transparency and peel strength characteristics and can still be employed as relatively thin films (i.e., 2 to 100 mils) while exhibiting only minimal swelling when in contact with moist environments.

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Hawley's Condensed Chem. Dictionary; 1987; p. 947.

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