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| Omicure U-35 |
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| 39992-90-0 |
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OMICURE U-35, a cycloaliphatic substituted urea, is intended for use as a latent accelerator for the dicyandiamide cure of epoxy resins. The addition of OMICURE U-35 to epoxy/dicy formulations produces shelf stable one part products which cure in shorter times and/or at lower temperatures. Of the CVC substituted ureas, OMICURE U-35 will impart the longest room temperature shelf life to epoxy/dicy formulations.
On an equal weight basis, OMICURE U-35 is less efficient than aromatic ureas for accelerating the epoxy/dicy cure. Cures can be obtained at 115¡ÆC in approximately one hour and in less than seven minutes at temperature of > 150'C. Suggested use levels of OMICURE U-35 are < 5 phr. Cure times are dependent on the composition of the formulated product and your particular end application.
Room temperature shelf lives (time to double viscosity) in excess of six months are easily obtained. Some of the factors which can effect shelf life are formulation ingredients and compounding parameters. Ingredients in which OMICURE U-35 is insoluble at processing and storage temperatures further enhance storage stability of formulated systems. OMICURE U-35 can be incorporated into your formulation concurrent with the dicy addition.
* APPLICATIONS
As a latent accelerator in the dicyandiamide cure of epoxy resins used in:
- Adhesives
- Powder Coatings
- Prepregs
- Encapsulation
- Reinforcements |
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Appearance : Clean powder
Color : Off white
Odor : Ammoniacal
Melting Point, 'C 1: 90 - 200
Moisture Content, max % : 0.7
Particle size, min. % through a 325 mesh screen : 80
Particle size, U35M (micronized) min. % through a 325 mesh screen : 95 |
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