Abstract: A method of producing a hydrogel product comprises impregnating a coherent fibrous structure with an aqueous solution of a hydrogel precursor material said fibers incorporating cations which are capable of cross-linking said precursor material to form a fiber reinforced hydrogel as the hydrogel product.

Abstract: A method of producing a hydrogel product comprises impregnating a coherent fibrous structure with an aqueous solution of a hydrogel precursor material said fibers incorporating cations which are capable of cross-linking said precursor material to form a fiber reinforced hydrogel as the hydrogel product.

Abstract: A wound treatment composition comprises an amorphous hydrogel incorporating fibers which have provided cations for cross-linking the hydrogel and a bacteria static agent. The composition has a viscosity of 20,000 to 1,000,000 cPs.

Abstract: A process for the preparation of polyurethane resins particularly suitable for electrostatic spinning which comprises forming a prepolymer of polyether glycol and a diisocyanate reacted in a molar ratio of about 1:2, and thereafter reacting the prepolymer with additional diisocyanate and a diol extender, the final molar ratio of the polyether, isocyanate and diol reactants being approximately 1:3.7:2.5. The reaction is conducted in an organic solvent at a temperature of about 45.degree. C. to obtain a polymer having an inherent viscosity of from about 2.0 to 2.4 in a solution of 25 to 30 percent solids. The solution is diluted to about 15 percent solids prior to spinning.

Abstract: A method for the electrodeposition of osmium, ruthenium or their alloys from alkali metal salts of the same in a nonaqueous solvent capable of permitting dissociation of the salt and having low surface tension (e.g., methanol or dimethyl formamide) or mixtures. A silicone layer chemically bonded to the surface of said electrodeposited layer. Also, a bonding tool having a tip coated by either of the above electrodeposited layer or the silicone layer, or both.

Abstract: A method for the electrodeposition of osmium, ruthenium or their alloys from alkali metal salts of the same in a nonaqueous solvent capable of permitting dissociation of the salt and having low surface tension (e.g., methanol or dimethyl formamide) or mixtures. A silicone layer chemically bonded to the surface of said electrodeposited layer. Also, a bonding tool having a tip coated by either of the above electrodeposited layer or the silicone layer, or both.