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Isocyanates

3/10/22       
Mark B

Reading the skinning post/bloxygen it popped into my head reading
Bob Niemeyer's reply regarding using isocyanate catalysts in regards to their use. I suppose it may be a question more to MFR rep but our local distribution for ML Campell for a while was via a pretty large scale auto body/finish distributor that had taken on the line (since dropped it) and when I would speak with them about Isocyanates in the catalysts (mainly when we were spraying Campbells waterborne 2K) they would always comment that they couldnt believe the Iso hadnt been formulated out by now. They said the automotive finish industry had moved away from Isocyanates a long time ago for all the reasons imaginable.

No idea if thats true or not (on the automotive side) but wondered if anyone had any input on it. I seem to remember a friend who was a phenomenal body man and painter having a fit after spraying some "new finish" he'd been turned on to only to find out the issues months later and this would have been like back in 1990 and he immediately moved to fresh air hood etc..

3/10/22       #2: Isocyanates ...
Bob Niemeyer  Member

Website: niemeyerrestoration.com

The 2k urethane manufacturers have been working on this for years. I am lucky enough to also be one of ICA's technical reps for the last 20 years and have "played" with some of these new formulations over the years. Until the finishing market demand is higher for these types of coatings and as resin manufacturer technology gets better over time we will see more Iso free 2k PU
products showing up on the market.
If your a coating nerd here is a link to a good article on the subject.
Happy reading!!

Iso free urethanes

3/14/22       #3: Isocyanates ...
DannyB Member

The latest iso-free formulation in wood finishing you will find (outside of specialty formulations) is probably Aristothane from Mohawk, which is fairly new to market.

As Bob said:
The chemistry is harder for iso-free, and in particular, controlling pot-life effectively while still getting to the final properties you want.

In that sense, ISO is easy for them to formulate with and get pot life and film properties to come out well.
DOW and others have been playing with it for a while, and there are now good alternative catalysts that generate the same final abrasion resistance, etc without losing pot-life. But it is definitely trickier.

3/15/22       #4: Isocyanates ...
herb johnson

one of these years there will be a class action lawsuit against iso catalyst, it stays in in your liver and kidneys. it is probably the reason why europe went to downdraft to protect their painters from this toxic chemical plus all the tyvek and fresh air systems plus mixing booths.....it is no joke

good luck herb j.

10/25/22       #5: Isocyanates ...
John Perry

Milesi BCA. Iso and formaldehyde free.

https://www.milesi.com/en/prodotto/bca-coatings/


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