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UR200 Urea Latent Accelerator for Epoxy Curing Diuron

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area: Beijing
Expiry date : Long Effective
last update: 2019-09-01 12:09
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Product details

IDENTIFICATION:


Chemical name: 3-(3,4- Dichlorophenyl)- 1,1- dimethylurea / Diuron

Synonym: 1-(3,4-dichlorophenyl)-3,3-dimethylurea ; Diuron ; Dyhard UR200

CAS Number: 330-54-1

Structural formula:




A latent accelerator UR200 based on substituted urea for thermosetting epoxy curing systems, well combined with Dicyandiamide hardeners

 

SPECIFICATION:


Appearance

white powder

Assay

Min. 98.0%

Melting point

Min . 155℃

Particle size 98.0%

Max. 10 μm

Volatiles

Max. 1.0%

 

APPLICATION


UR200 Diuron can well activate the dicyandiamide curing in most kinds of single component thermosetting epoxy formulations :

★ Prepregs of epoxy composites e.g. for aerospace and sports equipments industry

★ Encapsulation materials for electronic industry e.g. CCL ,

★ Structural adhesives e.g. conductive resin

★ Powder coatings for car, marine ,airplane

★ Reinforcements e.g. fiberglass, carbon fiber

 

ADVANTAGES


Excellent balance between acceleration and latency

 

Compared with using dicyandiamide alone , the combination with UR200 can significantly reduce the curing temperature to 120-140℃

Moreover, with the urea group ,UR200 acts by providing isocyanate and active dimethyl-amine(DMA), the former reacts with epoxy to produce structural cross-link ,the latter finally becomes tertiary amine which catalyze curing of epoxy. Due to steric hindrance,UR200 makes the compounds a shelf life up to 3 months  

 

FORMULATION CASES

 

Formulation

1

2

3

UR200

1.0 phr

3.0 phr

5.0phr

Dicyandiamide Micronized

6.5 phr

6.5 phr

6.5 phr

Liquid bisphenol-A-epoxy resin

(EEW   182 -192)

100 phr

100 phr

100 phr

DSC –Onset [°C]

152

148

145

DSC –Tg [°C]

153

136

128

Gel time 140°C [min]

6

5

4

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

130

100

90

 

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 24 months.

 

For further information about UR200 ,please leave a message and we will get you prompt response 


http://www.glorisochem.com/

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