A method for recycling matrix residues includes steps of degrading a target epoxy to form matrix residues, collecting the matrix residues, and adding the matrix residues into a polymer-forming formulation. Characteristically, the polymer-forming formulation includes multifunctional anhydride monomers and polyfunctional co-reactant monomers.

A epoxy resin composition includes a given epoxy resin [A], an aromatic amine compound [B], an organic acid hydrazide compound [C] having a structural formula represented by general formula (I) or (II) (X is a structure selected from among monocyclic and polycyclic aromatic ring structures, polycyclic aromatic ring structures, and aromatic heterocyclic structures and optionally has, as a substituent, any of C.sub.4 or lower alkyl groups, a hydroxy group, and an amino group), and a thermoplastic resin [D], wherein the amount of the constituent element [C] is 1-25 parts by mass per 100 parts by mass of the constituent element [A], the epoxy resin composition, after having been held at 80° C. for 2 hours, having a viscosity which is up to 2.0 times the initial viscosity at 80° C.

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The host compound in a clathrate is an amino or hydroxyl containing aromatic phosphorous compound, clathrates containing a resin curative and their use in curable resin compositions to produce moulded articles particularly fibre reinforced articles.

Formulations comprising from 10 to 80% by weight of the formulation of a halogenated epoxy resin; from 1 to 15% by weight of the formulation of an antimony based fire retardant; from 1 to 10% by weight of the formulation of an inorganic or non-polymeric organic phosphorous containing fire retardant; and from 1 to 30% by weight of the formulation of a curative system are provided. The formulations are particularly suitable for producing aircraft interior composite components having good fire retarding properties, low smoke emission, low smoke toxicity and low heat release properties. The formulations also have excellent processing and mechanical properties. Further components may be included in the compositions to improve various properties, including the fire retarding, low smoke emission, low smoke toxicity and low heat release properties and to also further improve the processing and mechanical properties, including toughness. Compositions produced from the formulations have excellent processing and mechanical properties, and may also have good surface finishes.

A thermosetting epoxy resin composition including, as curing agent, a dihydrazide selected from the group consisting of glutaric dihydrazide, adipic dihydrazide and pimelic dihydrazide, in combination with a specific urea accelerator, which features good storage stability and a low curing temperature. The epoxy resin composition is especially suitable for use as bodywork adhesive.

This invention relates to fusion bonded epoxy rebar powder coating compositions of enough latency overtime, which cure in seconds upon residual heat up to 239.0° C., exhibiting low temperature flexibility to achieve crack-free rebar bending at −45° C. and a glossy finish without yellowing or discoloration. This invention further relates to rebar powder coatings compounded using suitable dihydrazide amines as the curing agent, in combination with an executive resin blend including a compatible toughening epoxy, and a synergic catalyst package to meet the intended application challenges.

A one-component toughened epoxy-modified polyurethane and/or urea adhesive includes a mixture of dicyandiamide and a dihdyrazide as curing agents. The mixture of curing agents permits the adhesive to be cured at lower temperatures while developing good adhesive and mechanical properties in the cured adhesive.

Powder coating compositions that include an epoxy resin composition and a curing agent are described. The powder coating compositions can be applied at low application temperatures of about 165° C. to 185° C. The coating compositions can be used to form fusion-bonded single layer and dual-layer epoxy pipe coatings, and demonstrate optimal corrosion resistance and flexibility with reduced cathodic disbondment.

A thermosetting resin composition, wherein a cured product of the thermosetting resin composition that has been cured at 130° C. for 15 minutes has a moisture absorptivity of 2.5% or less after 168 hours at 85° C. and 85% RH, and a ratio of the light transmittance with a wavelength of 700 nm/the light transmittance with a wavelength of 400 nm of 2 or less.

A curative resin containing at least 50 wt % of an epoxy phenolic resin comprising a mixture of a carboxylic hydrazide and a hydroxy substituted urone.