Bayville Chemical Supply Company Inc 70-G East Jefryn Boulevard Deer Park, New York, 11729 USA Telephone: 631-586-4309 Fax: 631-254-5591 E-Mail:
Bayville Chemical Supply Company Inc70-G East Jefryn BoulevardDeer Park, New York, 11729  USA           Telephone: 631-586-4309      Fax: 631-254-5591      E-Mail: 



4,4’-Methylene Bis (Phenyl Dimethyl Urea)



Omicure U-52 (4,4’-Methylene Bis (Phenyl Dimethyl Urea)) is an aromatic substituted urea. It is intended for use as a latent accelerator for the dicyandiamide cure of epoxy resins. The addition of Omicure U-52 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, methylene bis (phenyl dimethyl urea) provides the best combination or acceleration, long shelf life and maintenance of cured properties in dicy DGEBA.


Typical Properties:

CAS Number                                    10097-09-3

Formula                                            C19H24N4O2

Formula Weight                                340.42

Appearance                     Off White Crystalline Powder

Odor                                                  Ammoniacal

Specific Gravity                                  > 1

Melting Point                                      220 – 230oC

Moisture Content                               0.7% maximum

Particle Size (% through a 325 Mesh Screen)    80%



Suggested Use levels of Omicure U-52 in DGEBA/DICY are < 5 phr. At 5 phr curing can be accomplished in about one hour at 100oC and in less than five minutes at temperatures > 150oC. Room temperature shelf lives (doubling of viscosity) are longer than six months. Cure times and shelf lives are dependent on composition of the formulated product and your particular end application. Some factors which can affect shelf life are formulation ingredients and compounding parameters. Ingredients in which Omicure U-52 is insoluble at processing and storage temperatures will enhance overall storage stability. Omicure U-52 can be incorporated into your formulation concurrent with the dicy addition.


Where to Find Us:

Bayville Chemical
70 East Jefryn Boulevard
Suite G
Deer Park, NY 11729

Phone: 631 586-4309

What's New

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