CUCAT Series of Bubble Free Catalyst

CUCAT series of Non Foaming PU Catalyst are ideal catalysts substitute for
mercury catalyst in non foaming CASE field. Organic mercury catalyst has four
unique characteristics: activity is slow before but fast after, no foaming and
high performance. In particular, the characteristic of no foaming is the unique
symbol of organic mercury. It is generally used in various isocyanate and
active hydrogen systems, but the high toxicity of organic mercury makes it
almost banned in the world. Years of research have proved that it is impossible
to completely replace organic mercury with only one environmental protection
catalyst. CUCAT series catalysts are developed by subdividing the application
of organic mercury in various polyurethane systems. The catalytic effect of
organic mercury can be achieved or even exceeded by selecting different CUCAT
catalysts for different systems.
Conventional catalysts in polyureth , ane industry  basically have a strong
catalytic effect on the reaction between isocyanate and water, which is
difficult to meet the requirements of no bubbles in most products of CASE
field. At present, it is recognized that organic bismuth, whose catalytic
properties are closer to that of organic mercury, can not avoid foaming,
bulging and cracking even if a more stringent moisture control production
process is adopted, for only controlling the moisture in raw materials is not
enough, environmental factors, including trace moisture in the air, are
difficult to control but have a great impact. Organic bismuth is still
unsatisfactory, organic tin and amine catalysts that are more sensitive to
water are even less applicable.
CUCAT series catalysts are developed to meet the bubble free requirements of
products in CASE field especially polyurethane elastomer. Different from the
common moisture sensitive amine/tin catalysts, it does not catalyze (weakly
catalyze) the reaction of trace moisture with isocyanate, so as to avoid
generating CO2 bubbles. Under the working conditions of high temperature and
high humidity, it can also effectively avoid the result of multi bubbles,
cracking, bulging, peeling and lusterless, surface stickiness, etc.
Taking CUCAT-DG02 catalyst suitable for MOCA curing as an example, its typical
characteristics are very close to organic mercury.

Click to Enlarge