W. R. Grace Co.-conn.

Hampshire Chemical Corp.

Timothy G Grasel

Clifton L Kehr

James L Guthrie

William Peyton Roberts

Felek Jachimowicz

James A Braatz

Cynthia Louise Ebner

Richard W Bush

Clifford Alvin Ferrin, Jr

Eugene E Carney

Shao-Hai Wu

William S Letter

Tsutomu Takeuchi

Controlled release membranes are prepared from polyureaurethane polymer derived from prepolymer units at least 75% of which are oxyethylene-based diols or polyols having essentially all of the hydroxyl groups capped with polyisocyanate are disclosed. The membranes are characterized by their biocompatibility and resistance to nonspecific protein adsorption and are particuarly useful for delivery of proteinaceous materials in drug-delivery systems, i.e., wound dressings. Also disclosed are novel biocompatible, protein-nonadsorptive hydrated polymers and the method of producing the same.

Protein nonadsorptive membranes for wound dressings

Copolymers of styrene and sodium styrene sulfonate can be combined with a plasticizer to make a non-PVC plastisol sealant for containers.

Styrene sodium styrene sulfonate copolymer for plastisol sealant

Hydrophilic polyurethane urea foams which are made without toxic, leachable additives are disclosed. High molecular weight, isocyanate-terminated, ethylene oxide-rich prepolymers are used in place of surfactants to make the foams.

Hydrophilic polyurethaneurea foams containing no toxic leachable

A water absorbent, relatively dimensionally stable foam is formed from a prepolymer prepared from a polyoxyethylene containing diol, a crosslinking agent and a polyisocyanate. The preferred polyisocyanate is methylene bis(cyclohexyl isocyanate). The foam also demonstrates the ability to hold substantial amounts of water, even under pressure, and can be used in various personal and medical care products such as diapers and surgical sponges.

Water-absorbent, high capacity polyurethane foams

Packaging materials containing inherently antistatic foams and a method of using the foams are disclosed. The foam used is a polyether polyurethane foam prepared from an isocyanate containing prepolymer which is the reaction product of a oxyethylene containing polyol and a polyisocyanate. The foams show surface resistivity of less than 1.times.10.sup.12 ohms/square and static decay times of about two seconds or less. A preferred foam shows static decay times of 0.1 seconds or less. The packaging includes articles used around static sensitive devices or used to store or transport static sensitive devices.

Packaging material containing inherently antistatic polymeric foam and

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Laurel, MD, United States of America

Timothy G Grasel