Abstract: A hardener for epoxy resins is disclosed the use of which imparts improved resistance in the resins to aging on exposure to ultraviolet radiation. The hardener comprises (a) at least one amine selected from the group consisting of trimethylhexamethylenediamine and isophoronediamine and (b) at least one inorganic salt which contains nitrate ion.

Abstract: A system for supplying a reactive mixture of two components in which the two components are stored in a single chamber of a container in a form in which one of a reactive components is in the form of globules distributable in the other reactive component with each globule encased in a layer of a distributable material nonreactive with the two components. As the two components are forced toward an outlet, they are subject to heat from a heater which melts the layer and thereby destroys them to release the contents of the globules into the reactive component in which the globules are distributed.

Abstract: A system for supplying a durable reactive mixture to components in which the two-components are stored in a single chamber of a container in a form in which one of the reactive components is in the form of globules distributive in the other reactive component with each globule encased in a layer of a destructible material non-reactive with the two-components. The two-components are forced toward an outlet means between a pair of rollers which can destroy the continuous layers surrounding the globules to allow the contents of the globules to mix with the surrounding component. Alternatively or, in addition, a heater can be provided to provide sufficient heat to melt the layers and release the contents of the globules.

Abstract: The present invention relates to a homogeneous accelerator system for epoxy resins and to a method of curing such epoxy resins, wherein the system comprises (a) an inorganic salt which contains a nitrate ion, (b) aliphatic hydroxy compound selected from monohydric alcohols containing 1 to 10 carbon atoms in the molecule, polyhydric alcohols containing 2 to 10 carbon atoms and 2 to 4 hydroxy groups in the molecule, and poly (C.sub.2-5 alkylene) glycols and (c) an aminophenol.

Abstract: The present invention provides a homogeneous accelerator system, having improved efficacy for curing epoxy resins, which comprises (A) an inorganic salt which contains a nitrate ion, (B) an aliphatic hydroxy compound selected from monohydric alcohols containing 1 to 10 carbon atoms in the molecule, polyhydric alcohols containing 2 to 10 carbon atoms and 2 to 4 hydroxy groups in the molecule, and poly (c.sub.2-5 alkylene)glycols and (C) an aminophenol accelerator.

Abstract: The invention consists of a system for storing, initiating curing of and dispensing a multicomponent curable material. One of the component materials is in the form of a multiplicity of discrete units surrounded by respective destructible layers of a substance which is nonreactive with the components. The system includes a device for rupturing the destructible layers while the components are being dispensed. This device may include a screen, roller pair, or heating element.