摘要:
An aqueous ionomer gel having a high viscosity, particularly a proton conducting ionomer, as well as to related products incorporating such gels. Such aqueous ionomer gels are suitable for suspending catalysts for formation of catalyst inks, which in turn are suitable for screen printing on a variety of surfaces. Representative surfaces are the electrode or membrane surfaces in an electrochemical fuel cell. Methods for making aqueous ionomer gels are also disclosed.
摘要:
METHOD FOR PRODUCTION OF NITROCELLULOSE BASE FOR CONSOLIDATED CHARGES includes nitrating fine-fiber cellulose stuff to obtain predetermined concentration of nitrogen in the prepared nitrocellulose, removing impurities and excess of moisture from the nitrocellulose pulp, grinding the fibers and transferring the disperse stock to production of consolidated charges In order to reduce risks in production of non-plasticized nitrocellulose base and obtain porous consolidated charges having felt structure the nitrocellulose pulp is dried prior to grinding, then grinded to obtaining polydisperse mixture of fibrous particles of which mixture consolidated charges are formed. CONSOLIDATED PROPELLANT CHARGE BASED THEREON.
摘要:
A water-soluble sulfate ester of cellulose having a degree of substitution of about 0.3 to about 1.0 with a substantially uniform distribution of sulfate ester groups among the polymer units of the cellulose. A thickened aqueous medium containing water and said water-soluble sulfate ester of cellulose having a degree of substitution of about 0.3 to about 1.0.A water-insoluble sulfate ester of cellulose which is highly swellable in the presence of water and has a degree of substitution of up to about 0.3 with the sulfate ester groups being substantially uniformly distributed among the polymer units of the cellulose.A water-soluble colloidal cellulose sulfate ester having a degree of substitution of about 1.3 to about 2 with the sulfate ester groups being substantially uniformly distributed among the polymer units of the cellulose. A thickened aqueous medium containing water and said water-soluble cellulose sulfate ester having a degree of substitution of about 1.3 to about 2.0.A water-soluble colloidal cellulose sulfate ester having a degree of substitution of about 1.0 to about 1.3 with the sulfate ester groups being substantially uniformly distributed among the polymer units of the cellulose. A thickened aqueous medium containing water and said water-soluble sulfate ester having a degree of substitution of about 1.0 to about 1.3.