OMICURE® DDA5

OMICURE® DDA5

OMICURE DDA 5 is an ultra-micronized grade of Dicyandiamide, a solid latent curing agent for epoxy resins. It has a mean particle size of approximately 4μ and is one of several grades of Dicyandiamide offered by CVC that differ on particle size. OMICURE DDA 5 contains approximately 2-3% silica as an anti-caking aid. OMICURE DDA 5, like other grades of Dicy, is dispersed into a resin system where it remains stable until activated by heat. Without an accelerator, such as a substituted urea, dicyandiamide has an activation temperature of about 350°F and a formulated storage stability of over six months. When catalyzed with a latent accelerator, like one of the OMICURE U series of substituted ureas, one component adhesive and sealant formulas can be prepared with cure temperature of 250°F and excellent stability. The ultra-fine particle size of OMICURE DDA 5 will help to aid good dispersion, prevent settling, maximize reactivity, promote uniform cure to formulated systems, and avoid issues of ‘hot spots’. Epoxy systems cured with OMICURE DDA 5 are characterized by outstanding adhesion making it a preferred choice for adhesive formulations. OMICURE DDA 5 is compatible with all epoxy resins, including Bisphenol A and F epoxies and epoxy novolacs, can be used with diluted or undiluted resins, and is compatible with a wide variety of fillers and pigments. OMICURE DDA 5 is safe to handle and is considered non-toxic.

Typical Properties Values
Mean Particle Size
Moisture Content (loss @ 105°C) max % 0.5
Onset Melting Point, °C 207-212
Appearance White crystalline powder
Typical Flow Control Content, % 2 to 3
Application Group Application Description
Adhesives Automotive Mastics Dicyandiamide epoxy curative for 1K latent systems providing long shelf life.
Adhesives Automotive Injection Molded Structural Parts Dicyandiamide epoxy curative for 1K latent systems providing long shelf life.
Adhesives Industrial Structural Adhesives Dicyandiamide epoxy curative providing long shelf life.
Composites Advanced Composite Prepregs Dicyandiamide epoxy curative providing long shelf life.

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