Urethane Catalysts > K-KAT

Tin Free Catalysts for Urethanes

2K PU Systems Blocked Isocyanate Systems 2K Silane Terminated Systems

Catalysts for 2K PU Systems

Product	Metal	Level % as Supplied on TRS	System Type	Attributes
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-651	Bismuth Carboxylate	0.1 - 0.5% (2K PU) 1.0 - 2.5% (blocked NCO)	SB	Versatile bismuth carboxylate catalyst designed for blocked isocyanate, two component urethanes and one and two component silane terminated coatings. Improved hydrolytic stability.
Waterborne 2K PU
K-KAT XK-614	Metal Complex	0.25 - 1.0	SB, 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.
K-KAT XK-661	Metal Complex	0.25 - 1.0	SB, WB	A novel non-tin catalyst recommended for 2K solvent based and 2K waterborne polyurethanes, as well as, for 1K blocked isocyanate systems.
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
Solventborne/ Waterborne
K-KAT XK-640	Bismuth	1.0 - 2.5	SB	A versatile bismuth carboxylate catalyst designed for blocked isocyanate and two component urethane coatings. Provides improved hydrolytic stability compared to other bismuth carboxylate catalysts.
K-KAT XK-635	Metal Complex	0.5 - 1.0	SB	Non-tin catalyst effective with MEKO blocked isocyanates.
K-KAT XK-651	Bismuth Carboxylate	0.1 - 0.5% (2K PU) 1.0 - 2.5% (blocked NCO)	SB	Versatile bismuth carboxylate catalyst designed for blocked isocyanate, two component urethanes and one and two component silane terminated coatings. Improved hydrolytic stability.
K-KAT XK-672	-	0.1 - 1.0%	SB, WB	Excellent lm properties. K-KAT XK-672 meets the requirements of FDA 21 CFR 175.300.

2K Silane Terminated Systems

Product	Metal	Level % as Supplied on TRS	System Type	Attributes
Solventborne/ Waterborne
K-KAT XK-651	Bismuth Carboxylate	0.1 - 0.5% (2K PU) 1.0 - 2.5% (blocked NCO)	SB	Versatile bismuth carboxylate catalyst designed for blocked isocyanate, two component urethanes and one and two component silane terminated coatings. Improved hydrolytic stability.
K-KAT 670	Zinc	1.0 - 3.0%	SB	A novel non-tin catalyst for coatings, adhesives, sealants and elastomers containing crosslinkable silane terminated polymers.

Product

Metal

Level
% as Supplied on TRS

System Type

Attributes

TDS

Sample

Solventborne/ Waterborne

K-KAT XK-651

Bismuth Carboxylate

0.1 - 0.5% (2K PU)

1.0 - 2.5% (blocked NCO)

Versatile bismuth carboxylate catalyst designed for blocked isocyanate, two component urethanes and one and two component silane terminated coatings. Improved hydrolytic stability.