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Tin Free Catalysts for Urethanes

2K PU Systems Blocked Isocyonate Systems

Catalysts for 2K PU Systems

Product	Metal	Level % as Supplied on TRS	System Type	Attributes	TDS	Sample	Ask Us
Solventborne 2K PU
K-KAT XC-B221	Bismuth	0.03 - 2.0	SB	Similar to DBTDL. Very effective in 2K and blocked isocyanate coatings. Best hydrolytic stability of the Bismuth catalysts.
K-KAT 348	Bismuth	0.03 - 1.0	SB	Similar to DBTDL. Very effective in 2K and blocked isocyanate coatings.
K-KAT 4205	Zirconium	1.0 - 2.0	SB	Selective Catalyst (less gassing). Good pot life. Recommended for 2K PU coatings.
K-KAT 5218	Aluminum	1.0 - 2.0	SB	Excellent 2K urethane pot life when used with 2,4 pentanedione
K-KAT XK-635	Metal Complex	0.1 - 0.5 (2K PU) 0.5 - 1.0 (blocked NCO)	SB, SL	Effective replacement for tin catalysts, with good balance of cure/pot life in 2K PU. Effective with MEKO blocked isocyanate. Good hydrolytic stability.
K-KAT XK-639	Metal Complex	0.1 - 0.5 (2K PU) 0.5 - 1.5 (blocked NCO)	SB, SL	Effective replacement for tin catalysts with good balance of cure/pot life in 2K PU. Effective with DMP blocked isocyanate. Good hydrolytic stability.
Waterborne 2K PU
K-KAT XK-614	Metal Complex	0.25 - 1.0	WB	Most versatile. Effective in 2K WB and blocked isocyanate systems. Great hydrolytic stability. For use in polyol component.
K-KAT 6212	Zirconium	0.3 - 2.0	SB, WB	Selective catalyst for SB and WB 2K PU coatings. Sensitive to moisture, include in isocyanate component or as 3rd component.
Cast Elastomer 2K PU
K-KAT XK-604	Mixed Carboxylate	0.1 - 1.0	SB	Very good gel profile in ambient cure 2K urethane elastomer systems. Alternative to mercury.
K-KAT XK-617	Mixed Carboxylate	0.1 - 1.0	SB	Excellent gel profile. Slightly less selective than XK-604.
K-KAT XK-618	Mixed Carboxylate	0.1 - 1.0	SB	Best gel profile compared to mercury, with induction period followed by snap cure. Best compatibility in 1,4-butanediol.

Blocked Isocyanate Systems

Product	Metal	Level % as Supplied on TRS	System Type	Attributes	TDS	Sample	Ask Us
Solventborne/ Waterborne
K-KAT XK-635	Metal Complex	0.5 - 1.0	SB	Non-tin catalyst effective with MEKO blocked isocyanates.
K-KAT XK-639	Metal Complex	0.5 - 1.5	SB, WB	Non-tin catalyst effective with DMP blocked isocyanates.
K-KAT XK-620	Metal Complex	1.0 - 2.0	E-coat	Designed specifically for use in cathodic E-coat.

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