spray finish without formaldehyde

[LeonieB]

HI everyone
I am looking for a single pack polyurethane finish that can be sprayed on but does not have formaldehyde in it (or anything else too toxic). I like the look of the Mirotone spray single pack PU but want to steer clear of the formaldehyde. This is for a timber kitchen carcass made of recycled hardwood.

Does anyone have any other suggestions?
Thanks
LeonieB

[Big Shed]

Leonie, does the Mirrotone PU list formaldehyde in the contents?

That would surprise me.

[LeonieB]

HI
Yes it does - the one pack spray on has a small amount of formaldehyde
LeonieB

[Big Shed]

Hi Leonie, well I am surprised...........

Just looked up Wattyl Estapol's MSDS and it certainly doesn't list formaldehyde as an ingredient, nor do I see why it would be used in a coating of this nature.
If you have a look at the MSDS (material Safety Data Sheet) for Solver Interior Polysol, an interior polyurethane-alkyd the same as Wattyl Estapol (wattyl own Solver), you will see that it does not contain formaldehyde. It also doesn't contain unreacted isocyanate (or free isocyanate).

Normally formaldehyde is present in chipboard and MDF panels, which are manufactured using urea-formaldehyde glues.

I certainly would not have an issue with using products such as Solver Polysol or Wattyl Estapol. Alternatively you could use the water based equivalent Solver PolyAaqua but that wouldn't be quite as hardwearing as the solvent based version, but would semll better during application.

Hope that helps.

[LeonieB]

Thanks Bigshed
I just looked at these and they dont seem to be spray on?
LeonieB

[Big Shed]

They can applied any way you want, spray is fine. They are however slower drying than a lacquer for instance, but they don't have the strong solvents either.

If you can give me the full Mirrotone product name, perhaps I can find you a similar non-formaldehyde containing product.

What sort of spry gun are you going to use? Or (shock horror) are you talking about aerosol spray packs?

[LeonieB]

HI Bigshed
Thank you. its Mirotone 3210.

WE will get someone else to spray it commercially.
Thanks again
Leonie

[ubeaut]

Think you'll find, many finishes have formaldehyde in them, as a part of another chemical/additive used in the hardening or cross linking processes. It is usually so minute that it's not required to be listed in the MSDS or are listed as something else as a part of the whole (if you know what I mean)

Most formaldehyde in finishes is totally locked into the finish and doesn't leach out like it does in chipboard etc and is considered quite safe when the surface is dry. At least that is my understanding of it and what I have been advised.

Cheers - Neil

[Big Shed]

Leonie, according to the Mirotone website, 3210 is a precat Nitrocellulose Lacquer, not a single pack PU. Are you sure this is a PU?????

If the MSDS for 3210 lists formaldehyde, what percentage does it give?

The MSDS for 3210 on the Mirotone site is locked so I can't look it up.

[LeonieB]

HI

Sorrry - it is a laquer.

Mirotone 3210 lists:
resins
plasticiser
aromatic solvents
alkyl esters
alkyl alcohols
formaldehyde less than 0.1%.
ingredients determined not to be hazardous.

Formaldehyde is definitely listed as a separate ingredient.

LeonieB

[Big Shed]

Well, that was a very long winded way of getting at the correct information, bit of wild goose chase really!

If you are going to be worried about < 0.1% formaldehyde, which as Neil said, is probably a component of one of the raw materials, then I suggest you will be quite limited in the materials that can be in your house.

[Master Splinter]

If you are worried about the amount of formaldehyde in paint, you'd better stop eating fruits and vegetables.

...Aside from being one of the most common chemicals around - quoting from http://www.atsdr.cdc.gov/mhmi/mmg111.html

"Formaldehyde is synthesized by the oxidation of methanol. It is among the 25 most abundantly produced chemicals in the world and is used in the manufacture of plastics, resins, and urea-formaldehyde foam insulation.
Formaldehyde or formaldehyde-containing resins are used in the manufacture of chelating agents, a wide variety of organic products, glass mirrors, explosives, artificial silk, and dyes. It has been used as a disinfectant, germicide, and in embalming fluid. In the agricultural industry, formaldehyde has been used as a fumigant, preventative for mildew in wheat and rot in oats, a germicide and fungicide for plants, an insecticide, and in the manufacture of slow-release fertilizers.
Formaldehyde is found in construction materials such as plywood adhesives. Formaldehyde also is or has been used in the sugar, rubber, food, petroleum, pharmaceuticals, and textiles industries."

...formaldehyde is also a breakdown product of normal digestion. There are these so-called 'natural' products that are actually little formaldehyde factories once you eat them!

Juices, fruits and vegetables will all produce methanol in your body when digested. Methanol is then broken down to formaldehyde, which is then turned into formic acid, which is then turned into water and carbon dioxide which are excreted from the body.

Unless you are going to get rid of all fruit and vegetables from your diet, you are still going to be running foul of formaldehyde!

[Dirty Doogie]

I am glad someone pointed that out.

[China]

Thanks Master Splinter saved me the trouble

[ubeaut]

Less than 0.1% that means there is a minimum 99.9% of the product that isn't formaldehyde.

The MSDS says LESS than 0.1% as the amount is minuscule. It's most likely considerably less than stated, possibly as low as 0.01% or even less. In most instances the MSDS isn't exact measurements but a max and min range with minuscule amounts marked as Less than or in many instances not even mentioned.

This will be why it isn't shown in some of the other MSDS's that have been searched.

I'd be much more worried about what's in the recycled hardwood in the carcases or about the formaldehyde in many other things than the minute amount that would be locked tightly within a finish.

Cheers - Neil