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Adipic dihydrazide (ADH) CAS NO.1071-93-8

Source: Date:2018-12-20 16:27:27 Visits:

Product presentation

Product name: Adipic Dihydrazide (ADH);
CAS NO.:1071-93-8;
Molecular Formula: C6H14N4O2;

Appearance:Light yellow or White crystals ;
Melting point: 173-185℃;
Purity: ≥99.0% ;
Water: ≤0.5% ;
Ash: ≤0.01%;
Free hydrazine: ≤20 ppm;
Free methyl alcohol: ≤0.1%;
Fe: ≤ 0.0005%;
Chloride(as Cl):≤ 0.005%;
Sulfate(as SO4): ≤ 0.005%;

Packing: 20KG/ Carton, or according to customer's requirement;

1 ADH is a crosslinker of waterborne acryl emulsions.
2 It is also useful as an epoxy resin hardener and a formaldehyde scavenger.
3 ADH reacts very rapidly with ketone groups. For example, it reacts easily with ketone groups of diacetone acrylamide or aldehyde groups of formaldehyde. 
4 ADH also reacts with the epoxy group like an amino compound.

---Room temperature crosslinkable waterborne coatings;
Acryl emulsion comprising acryl monomers and diacetone acrylamide crosslinks with amino groups of ADH very rapidly. The coating has excellent water resistance.
---Epoxy resin hardener         ADH reacts with epoxy resin at high temperature and is useful for powder coating.
---Reforming of plastic       Fiber processing;

Thanks to environmental regulations limiting volatile organic compounds (VOCs) and major improvements in the performance characteristics of the emulsion-based products, aqueous acrylic polymer emulsions are replacing solvent-based polymer systems.

The Superiority of the Diacetone Acrylamide (DAAM) and Adipic Acid Dihydrazide (ADH) Crosslinking System

--- DAAM and ADH are easy and safe to use.
---Both intermediates are formaldehyde free.
---DAAM uniformly copolymerizes within acrylic copolymers, creating well-dispersed pendant ketone crosslinking sites.
---Wet acrylic emulsions based on DAAM with ADH in the aqueous phase, are initially non-reactive and afford emulsions with good long-term stability during shipping and storage in retail containers (i.e., “in-can” stability).
---After film coalescence, crosslinking becomes rapid at ambient temperatures, thanks to water evaporation in the drying process and a simultaneous reduction in pH arising from the loss of ammonia.
---Because crosslinking is post-coalescence, the resulting three-dimensional polymer network exhibits enhanced mechanical strength and durability as well as maximum film cohesive properties.
---Crosslinking with the keto-hydrazide chemistry enhances abrasion, scrub, stain, and blocking resistance; moisture and solvent resistance; and substrate adhesion.

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