Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Borchers Borchi Kat 28 Bismuth Catalyst

Borchers Borchi Kat 28 is a high-performance bismuth-based catalyst from Borchers’ Borchi Kat series, designed for selective esterification and transesterification in polyurethane and polyester synthesis. It offers low toxicity, excellent thermal stability, and superior catalytic activity versus traditional tin catalysts—meeting strict REACH and RoHS compliance requirements.
  • borchers borchi kat 28 bismuth catalyst_527fc0b8
  • borchers borchi kat 28 bismuth catalyst_527fc0b8

Features Of Borchers Borchi Kat 28 Bismuth Catalyst

  1. Highly selective bismuth-based catalyst for polyurethane and polyurea synthesis.

  2. Non-toxic alternative to traditional tin or mercury catalysts, compliant with REACH and RoHS directives.

  3. Excellent hydrolytic stability and thermal robustness up to 120 °C.

  4. Enables precise control of gel time and pot life in demanding coating and elastomer formulations.

  5. Low volatility and minimal odor—ideal for indoor and sensitive application environments.

Typical Applications Of Borchers Borchi Kat 28 Bismuth Catalyst

  1. Waterborne and solventborne polyurethane coatings for automotive and industrial finishes.

  2. Reaction injection molding (RIM) and structural foam systems.

  3. High-performance sealants and adhesives requiring low-VOC, non-staining cure profiles.

  4. Elastomeric paving and athletic surfacing materials.

  5. Cast polyurethane elastomers for mining and wear-resistant components.

Specifications Of Borchers Borchi Kat 28 Bismuth Catalyst

Chemical TypeBismuth carboxylate complex
Product FormLiquid
AppearanceClear, light amber liquid
Primary ApplicationsPolyurethane & polyurea catalysis
Key FeaturesNon-toxic, REACH-compliant, low-odor
BenefitsExtended pot life, reduced fogging, improved surface quality
Density (20 °C)Approx. 1.25–1.30 g/cm³
Storage ConditionsStore in original sealed container at 5–30 °C, protect from moisture


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