4,4'-bis-sec-butylaminodiphenylmethane/Unilink4200/MDBA MDBA is the trade name of 4,4'-bis-sec-butylaminodiphenylmethane,also can be called Unilink4200,is a kind of liquid secondary diamine,cause the hydrogen atom on each of the amino groups is replaced by a sec-butyl group, the...
MDBA is the trade name of 4,4'-bis-sec-butylaminodiphenylmethane,also can be called Unilink4200,is a kind of liquid secondary diamine,cause the hydrogen atom on each of the amino groups is replaced by a sec-butyl group, the combination of the active hydrogen atom and the sec-butyl group produces many unique properties in a limited space, and the ahe amino moiety forms a urea linkage that affects the hard segment, while the butyl acts as an internal plasticizer.It is attached to the polymer matrix and does not leach or precipitate. At the same time, the alkyl group increases the solubility of the diamine so that it can be mixed with almost any polyol and polyamine.
Liquid, safe and easy to operate
Long life in the kettle
Low toxicity - Ames test is negative
Can be used for maturation of MDI prepolymers
Compatible with a wide range of polyol co-curing agents and other polyurethane chemicals
Hard foam:Enhanced compressive strength dimensional stability, reduced brittleness, high closed cell ratio, low thermal conductivity
TDI soft foam: low density, high strength, high load bearing
MDI soft foam: low density, low hardness, enhanced strength
4,4'-bis-sec-butylaminodiphenylmethane,Unilink4200-MDBA can be used for hard foam, soft foam, paint, adhesive, sealant, elastomer, typical use amount of 1-5% of polyol,4,4'-bis-sec-butylaminodiphenylmethane -MDBA also can be applied to spray polyurea and a variety of compounds for metal and concrete repair.
Polyurethane hard foam
The use of 3-5 php 4,4'-bis-sec-butylaminodiphenylmethane, Unilink 4200-MDBA in water or water-free rigid foam system can significantly improve the compressive strength and dimensional stability of the foam, while reducing the brittleness. Increase the closed cell ratio and reduce the thermal conductivity.
4,4'-bis-sec-butylaminodiphenylmethane-MDBA allows the base layer to be better wetted and the cured polymer adheres better to the coated surface.
4,4'-bis-sec-butylaminodiphenylmethane,Unilink4200-MDBAcan be applied to the ripening of the MDI semi-prepolymer to produce a series of high hardness elastomers.
The use of 4,4'-bis-sec-butylaminodiphenylmethane-MDBA as a curing agent can extend the life of the kettle to produce a soft elastomer for use as an industrial sealing material.
Reducing the gel reaction rate makes it possible to produce such high hardness polymers by spray casting techniques. The extended gel speed improves adhesion to the substrate, fluidity, bonding between coatings, and surface quality. The use of 4,4'-bis-sec-butylaminodiphenylmethane-MDBA as a curing agent can significantly improve the impact resistance and low temperature properties of the polymer.
4.Physical and chemical properties
Light brown to god amber liquid
% (quality score)
GB6283 (Karl Fischer method)
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