Abstract: A mixture of epoxy resins such as a semi-solid triglycidyl ether of tris (hydroxyphenyl) methane and a low viscosity bisphenol A glycidyl ether and a cationic photoinitiator such as a diaryliodonium salt is cured by irradiating with a dosage of electron beams from about 50 to about 150 kGy, forming a cross-linked epoxy resin polymer.

Abstract: An assembled battery including a plurality of bipolar cells is disclosed. In one embodiment, the battery a plurality of conduits for introducing electrolyte into the bipolar cells, each of the conduits acting to introduce electrolyte into a different one of the bipolar cells. In another embodiment, the battery comprises at least one spacer element acting to maintain the spacing between plates and/or electrodes in the battery.

Abstract: An assembled battery including a plurality of bipolar cells is disclosed. In one embodiment, the battery comprises a plurality of conduits for introducing electrolyte into the bipolar cells, each of the conduits acting to introduce electrolyte into a different one of the bipolar cells. In another embodiment, the battery comprises at least one spacer element acting to maintain the spacing between plates and/or electrodes in the battery.

Abstract: A compound prepared by reacting at least one aromatic or aliphatic polyamine compound having at least two amine groups, which are separated by no more than one carbon atom, with at least one carbonyl-containing compound selected from the group consisting of aldehydes and ketones, wherein said polyamine compound is selected from:aliphatic polyamines having 2-20 carbon atoms corresponding to the formula: ##STR1## wherein A is a direct carbon-carbon bond or --CH.sub.2 -- and R.sub.3 and R.sub.

Abstract: A curable composition, and composites comprising (A) an epoxy resin and (B) a heterocyclic compound prepared by reacting at least one aromatic or aliphatic polyamine compound having at least two amine groups, which are separated by no more than one carbon atom, with at least one carbonyl-containing compound selected from the group consisting of aldehydes and ketones.

Abstract: A prepreg having substantially no excess resin while at the same time having an aggressive tack. Small discrete amounts of additional resin are selectively applied to a surface of the prepreg sheets in a regular array. The resin is applied at a sufficient viscosity that it does not sink into the prepreg fabric. The additional resin typically covers less than 25% of the surface and constitutes between 0.1% and 3% of the prepreg weight. The additional resin may be applied by a gravure roller having a surface etched with an appropriate array of indentations. A doctor blade partially defines a reservoir of resin in contact with a portion of the gravure roller and wipes the surface, thereby leaving resin only in the indentations. The doctor blade may be oscillated parallel to the roller axis to prevent accumulations of short fibers from impairing the wiping action.

Abstract: A method for supplying a prepreg having substantially no excess resin while at the same time having an aggressive tack. Small discrete amounts of additional resin are selectively applied to a surface of the prepreg sheets in a regular array. The resin is applied at a sufficient viscosity that it does not sink into the prepreg fabric. The additional resin typically covers less than 25% of the surface and constitutes between 0.1% and 3% of the prepreg weight. The additional resin may be applied by a gravure roller having a surface etched with an appropriate array of indentations. A doctor blade partially defines a reservoir of resin in contact with a portion of the gravure roller and wipes the surface, thereby leaving resin only in the indentations. The doctor blade may be oscillated parallel to the roller axis to prevent accumulations of short fibers from impairing the wiping action.