H-256 is an important chemical intermediate with 3.3 '- diethyl 4,4' - diaminodiphenyl methane as the main component. It can be mainly used in adhesives, filament winding, laminates, high-performance coatings and tank lining coatings, as curing agents for epoxy resins and chain extenders for polyurethane elastomers.、
Structure:
Molecular weight: 254
Product characteristics:
1. Aromatic diamines in liquid form are convenient for formulation.
2. Low toxicity, no harm to operators.
3. Because of the presence of ethyl in the molecular chain, it not only plays a steric effect and has a long life in the kettle, but also plays an internal plasticizing effect, giving the product continuous excellent performance.
4. The products made from this raw material have excellent high temperature resistance and chemical resistance.
5. The reaction heat of the mixture is low and the linear expansion coefficient is small.
Physical and chemical properties of products:
Appearance: dark brown liquid
Viscosity: mpa · s/25 ℃ 2000~5000
Active hydrogen equivalent: 64
Amine equivalent: 124~130
Purity:(calculated by 3.3 '- diethyl 4,4' - diaminodiphenyl methane): ＞ 97%
Free amine: 0
Water content: ＜ 0.1%
Product packaging and storage:
25KG net weight plastic bucket. 200KG net weight iron bucket.
Under the specified storage conditions, the shelf life is 6 months, beyond which the product can still be used if it meets the technical indicators after inspection.
Safety precautions:
H-256 has low toxicity and volatility in terms of respiratory inhalation and skin absorption, making it less toxic when exposed for a short time under normal conditions (such as a small amount of leakage and scattering).
However, H-256 is an aromatic amine compound, which has certain toxicity and can cause slight skin irritation and allergy.
Be careful during operation to prevent direct contact with skin and splashing into eyes. Wear necessary protective equipment (latex gloves, protective glasses, work clothes, etc.). Once it is splashed on the skin or in the eyes, it should be washed immediately with water, and the skin should be washed with soapy water.
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