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888888

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Oligomeric and monomeric diamines

Oligomeric and monomeric diamines

740M

Chemical Name： Trimethyleneglycol di(p-aminobenzoate); 1,3-Propanediol bis(4-aminobenzoate)

Molecular Formula： C17H18N2O4

Molecular Weight: 314.3

CAS No.: 57609-64-0

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SPECIFICATION & TYPICAL PROPERTIES

Property Value
Appearance White to pale yellow powder
Purity(HPLC), % ≥99.0
Amine equivalent weight 154~160
Relative density(25℃) 1.19~1.21
Melting point, ℃ 125~129
Water content, % ≤0.20
weight loss by drying, % ≤0.5
Solubility Soluble in DMF and other solvents such as esters and ketones, insoluble in water

FEATURES & APPLICATIONS
XYlink 740M is an aromatic diamine with symmetrical molecular structure and containing ester group. It has similar molecular structure with XYlink P series curing agent, and higher melting point than P series.
XYlink 740M is a curing agent for polyurethane prepolymer and the epoxy resin. It can be used in a variety of elastomer, coating, adhesive, and potting sealant applications.
XYlink 740M has wide processing latitude. The polyurethane elastomer systems could be casted by hand or automatically. It is more suitable for the hot casting process with TDI (80/20)-type prepolymers and the cured polyurethane elastomer has excellent properties, such as good mechanical properties, heat resistance, hydrolysis resistance, electric properties, chemical resistance (including oil, solvent, moisture and ozone resistance) and good adhesion to the iron substrate.
740M is an FDA-approved curative in the production of elastomers for use in food contact applications and it is Ames-test negative.


PACKAGING
40kg net weight in kraft bag with polyethylene liner.


STORAGE
This product should be stored airtightly in ventilated and shady place at 10-25℃. Keep it away from moisture and sunshine.
Shelf life of this product is 2 years. If stored over shelf life, it can still be used when the main application properties be qualified by inspecting.