Abstract: Cyanoethylated and/or cyanopropylated hydrazides are useful as curing agents for polyglycidyl ether resins. These hydrazide-epoxy resin mixtures have useful pot lives and exhibit fast cures.

Abstract: A storage module or rack is disclosed for storage of nuclear fuel assemblies in a water-filled pool comprising an array of storage tubes arranged in a checkerboard pattern and attached to one another along their corners. Each tube thus forms a storage cell for a fuel assembly and the spaces between each four adjacent tubes form intermediate fuel assembly storage cells. The storage tubes are formed with spaced double walls between which is contained a layer of neutron absorbing material to assure that the array of stored fuel assemblies remains subcritical. Provision is made for free circulation of water through the storage cells to extract heat from the stored assemblies. The storage module maximizes the number of fuel assemblies that can be stored in a given space while minimizing the material used in its construction.

Abstract: The cured polyester or polyurethane adhesive bond seam joining two FRP (fiberglass reinforced plastic) parts, particularly in-mold coated FRP parts, is coated with a reactive polyepoxide resin-polyamide resinamine coating. After curing, sanding, sealing and painting, the seam area joining the parts did not exhibit any paint pops or sinks and the seam itself was invisible or nearly invisible.

Abstract: Novel products can be prepared by reaction of monohydrazides and/or polyhydrazides, in particular dihydrazides, with mono-, di- or, poly-acrylyl compounds. The reactants can be chosen such that the resulting polymers are strictly linear as in the case of reaction of a monohydrazide with a diacrylyl compound as follows: ##STR1## wherein each (O) is a carbonyl oxygen, n is a positive integer, each R is hydrogen or a monovalent group, and each Q is an organic group, R and Q being free of functions which would interfere with the desired reaction at 80.degree. C. Various degrees of crosslinking can be achieved by reacting monohydrazdes with components containing an average of more than two acrylate double bonds per molecule or by reacting di-hydrazides with di- or poly-acrylyl compounds.Fumaric, maleic and itaconic esters and acid esters add to hydrazides in a similar fashion as acrylates, the aliphatic double bond being similarly activated by the carbonyl group.

Abstract: Novel products can be prepared by reaction of monohydrazides and/or polyhydrazides, in particular dihydrazides, with mono-, di- or, poly-acrylyl compounds. The reactants can be chosen such that the resulting polymers are strictly linear as in the case of reaction of a monohydrazide with a diacrylyl compound as follows: ##STR1## WHEREIN EACH (O) is a carbonyl oxygen, n is a positive integer, each R is hydrogen or a monovalent group, and each Q is an organic group, R and Q being free of functions which would interfere with the desired reaction at 80.degree. C. Various degrees of crosslinking can be achieved by reacting monohydrazides with components containing an average of more than two acrylate double bonds per molecule or by reacting di-hydrazides with di- or poly-acrylyl compounds.Fumaric, maleic and itaconic esters and acid esters add to hydrazides in a similar fashion as acrylates, the aliphatic double bond being similarly activated by the carbonyl group.