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U 415 Urea Accelerator for Epoxy Curing Methylene Bis (Phenyl Dimethyl Urea) Synonym of Omicure U 41

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area: Beijing
Expiry date : Long Effective
last update: 2019-07-30 04:40
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IDENTIFICATION


Chemical name: N,N''-(methylenedi-4,1-phenylene)bis[N',N'-dimethyl urea]

Synonym: 4,4'-Methylene Bis (Phenyl Dimethyl Urea); MDI URON; Omicure U-415; Omicure U-52; Technicure MDU-11M

CAS Number: 10097-09-3

Structural formula:





A substituted urea, as latent accelerator for Dicyandiamide in epoxy resin formulations


SPECIFICATION


Appearance

Off-white powder

Assay

Min. 98.0%

Melting point

Min . 190℃

Particle size 95.0%

Max. 10 μm

Volatiles

Max. 1.0%


APPLICATION


U 415 well combined with DICY can reduce the time and temperature of epoxy curing by use level at 1-3 phr.

★ structural adhesives e.g. for automobiles ,plane ,ship industries

★ Powder coatings 

★ composites based Prepregs 


ADVANTAGES


U 415 which contents two isocyanate groups performs a best balance among reactivity, long shelf life and retention of the properties

Moderate Tg temperature


U 415 is suggested to be added < 3 phr Curing can be finalized within 80 minutes at 100°C and less than 5 minutes at 150°C.


FORMULATION CASES


Formulation

1

2

U 415

1.0 phr

3.0 phr

Hydrophobic fumed silica

3 phr

3 phr

Dicyandiamide Micronized

8 phr

8 phr

Liquid bisphenol-A-epoxy resin
(EEW 182 -192)

100 phr

100 phr

DSC –Onset [°C]

144

140

DSC –Tg [°C]

130

128

Gel time 140°C [min]

10

6

Shelf life (double viscosity) at 23°C [days]

300

150


Result values may be varied based on different used resin matrix.

Fillers and other additives to formulation can also change properties.


Packing and storage

--10 or 15kg per Box, carton, kraft bags, FIBC or customized

--Keep sealed in original package, under a cool and dry condition ,avoid humidity. recommended storage period no exceeds 12 months.


For further information about U 415 ,please leave a message and we will get you prompt response

http://www.glorisochem.com/

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