Patent 5591820 Issued on January 7, 1997. Estimated Expiration Date: May 9, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
528/76, With ether or thioether compound containing at least two -C-X-C- groups428/423.1, Of polyamidoester (polyurethane, polyisocyanate, polycarbamate, etc.)528/77, Ether or thioether compound contains three or more -XH groups528/85, With reactant containing at least two -XH groups528/905POLYMER PREPARED FROM ISOCYANATE REACTANT HAS ADHESIVE PROPERTY
Pressure-sensitive adhesives which possess absorptivity and/or permeability properties to remove transepidermal water loss and/or other bodily fluids that come into contact with the adhesive, in combination with a fine balance of cohesion and adhesion properties, can be formulated by controlling the crosslinking of a polyurethane polymer having excess hydroxyl functionality, a glass transition temperature of less than about 0° C., a moisture absorption of at least about 20% of its weight and/or a moisture vapor transmission rate of at least about 300 grams/meter2 /24 hours measured at 37° C. and a 90% relative humidity gradient. Adhesives of these polymers possess a peel adhesion to human skin of between about 0.3 and 4 newtons/cm width of the polymer or adhesive.
Mobay Corporation, Coatings Division publication, "Raw Materials for High Performance Coatings", 1989