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FASCAT® 4233 is a high-efficiency proprietary catalyst of butyltin mercaptide used in CASE applications.
FASCAT® 4233 is a catalyst with a specialized proprietary blended grade of butyltin mercaptide, frequently used in CASE applications. This catalyst is specifically used for the synthesis and curing of polyurethanes. It has the advantage of providing a delayed action cure, which is different from organotin carboxylates like FASCAT® 4202.
Form: Oily liquid
Color: Light amber
Sn %: 17.9
Specific gravity @ 25°C: 1.12
Refractive index @ 25°C: 1.50
Viscosity @ 25°C, cs: 45
Freezing point, °C: −30
Flash point, °C: >120
Gardner color: 0.7
Primary Chemistry: Butyltin mercaptide
Insoluble in water
Soluble in higher alcohols and other organic solvents
Synthesis and curing of polyurethanes
Delayed action cure compared to organotin carboxylates
High heat stability for PVC manufacturing
Lack of heat stability in PVC production
Chemical intermediates
Coatings
Adhesives
Inks
Sealants
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