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DA 250
General Information
 
DA 250 is a Polyoxypropylenediamine with a average molecular weight about 250.The carbon-oxygene backbone is terminated on both ends by primary amine groups which are attached to secondary carbon atoms .Hence the nucleophilic reaction of the amine groups is sterically hindered by the vicinal methyl groups. This leads to a moderate reactivity of DA 250 which is desired for many epoxy applications. The reactivity decreases also with the chain length. In this series,DA250 shows the highest reactivity and DA2000 the lowest.
 
Chemical and Physical Date
 
Properties
DA250
Unit
Appearance
Yellowish liquid
 
Density at 25°C
0.95
g/cm3
Boiling point
> 200
°C
Water
0.2
% m/m
Primary amine content
>96.5
% m/m

Application

DA250 is a highly reactive chain extender for polyurethanes and used as a modifier. Using of DA250 in epoxy applications leads to extremely hard products which are resistant to impact stresses and thermal cycling.
 

Safety and Handling

Harmful in contact with skin and causes burns. Avoid inhalation and contact with eyes and skin. Wear goggles and gloves.
 

Classification:

Labeling
corrosive (C)
R-Phrases
R 21, 34
S-Phrases
S 23, 26, 27

Transport and Packaging

Truck
GGVS+ADR: 8,53 b)
Train
GGVE+RID: 8,53 b)
Ship
IMDG-Code: 8,UN2735
 
 
Packaging type:
PE containers, capacity 25 kg
Drums (internally. coated) capacity 200kg
IBC containers, capacity 1000kg
Truck, capacity 20,000 kg

StorageKeep away from heat and humidity, storage under dry nitrogen is recommended. Shelf life 12 months.

 

This information is based on our present knowledge and experience. However, it implies no liability or other legal responsability on our part, including with regard to
existing third party patent rights. In particular, no guarantee of properties in the legal sense is implied. We reserve the right to make any changes according to
technological progress or further developments. The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Reference to trade names used by other companies is neither a recommendation, nor is it intended to suggest that similar products could not be used. All our business transactions shall exclusively be governed by our General Sales Conditions.

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