BX-EM23 is a composite catalyst of organic bismuth and zinc through fine control synthesis. It has the typical characteristics of eco-friendly bismuth and zinc catalyst.


Typical Properties:


Yellowish transparent liquid

Colour (Fe-Co)


Density (g/cm3, 25℃)


Viscosity (mPa.s, 25℃)


Metal Content

Bismuth 8±0.5%, Zinc 8±0.5%


With special compound odor


Solubility:Soluble in normal polyurethane raw materials.


Eco-friendly Characteristic:

It does not contain restricted heavy metals, polycyclic aromatic hydrocarbons and o-benzene substances, and complies with strict environmental protection regulations at home and abroad. It is an environmental protection substitute for traditional organotin, mercury, lead and other catalysts.



It is generally used in polyurethane industry and widely used in CASE (Coating, Adhesive, Sealant and Elastomer) field; The catalytic activity is equivalent to that of BiCAT 8.


Features & Advantage:

BX-EM23 is a composite catalyst of organic bismuth and zinc through fine control synthesis. It has the typical characteristics of eco-friendly bismuth and zinc catalyst:

  • Safety and environmental protection. It can replace organic lead, mercury and tin in some applications;

  • Compared with T9, it has better hydrolysis resistance stability, but it will still hydrolysis and fail in aqueous formula. Please choose AUCAT series for hydrolysis resistance catalyst.

  • Promote NCO / OH reaction. In oil-based or water-based polyurethane, it can reduce the side reaction between water and NCO group and reduce the generation of CO2 to a certain extent, but the selectivity of reducing the reaction of isocyanate with water is not as good as CUCAT-HA / HAA / PD;

  • Good catalytic coordination. Organic bismuth is a highly active catalyst to promote NCO / OH reaction. Organic zinc can promote the cross-linking reaction, accelerate post curing and form faster;

  • It has good compatibility and can be used alone or in combination with other organometallic compounds;

  • It does not contain solvents and does not belong to VOC substances.


User's Guide:

  •  If it is used for polyurethane two-component composite, it is recommended to be added into polyol (P material) component. It is recommended to add it after dehydration and stir evenly;

  •  If it is used for coating, it is recommended to add it before on-site construction, which will have better effect than premixing.

  •  The general dosage is 0.02 ~ 0.8% of the weight of PU.

  •  It is not recommended to be added into isocyanate component (material I). If it must be added, the applicability and storage stability test must be carried out first.

  • Be sure to seal and store immediately after use.


Handling & Storage:

Product should be stored in a cool, dry environment away from sunlight, excessive heat and rain.


Package: 25kg/200kg in HDPE drum


Shelf Life: The unopened shelf life is 24 months from the date of manufacture.

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