The Dow Chemical Company

G Robert Collins

Theodore L Parker

Joginder N Anand

Sven H Ruetman

Disclosed is dispersion of a polyurethane-urea polymer in a continuous phase. This dispersion contains about 0.1 to about 5 parts by weight of an ionizable, non-volatile salt per 100 parts by weight of polyurethane-urea polymer. Polyurethane-urea coatings made from this dispersion have excellent static dissipative properties.

Antistatic polyurethane-urea dispersions

The present invention pertains to a flexible organic polymeric optical fiber core having an adherent flexible organic polymer cladding on the outer surface. More particularly, the invention relates to an organic polymeric optical fiber having a polyureasiloxane copolymer, polyurethane-siloxane copolymer, or polyurethaneurea-siloxane copolymer cladding for in vivo use in the tissue of a living mammal, preferably a human being. In addition to compatibility in live tissue and body fluids, the fiber must be capable of repeatedly being deformed in a small bend radius without losing the ability to transmit light. The clad optical fibers useful to measure levels of components (e.g. pH, oxygen, carbon dioxide) in living, moving tissue, such as the heart or lungs.

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Walnut Creek, CA, United States of America

G Robert Collins