LDD

While surfing the web, I found the following report from the National Industrial Chemicals Notification and Assessment Scheme following an application from Shell Chemicals to import a product they call Neodol 1 - 9.

The interesting thing that this product is a surfactant used by Colgate - Palmolive in the manufacture of liquid dishwashing detergent and appears to form 19% of their product. The other interesting thing is that another name for this product is Polyethylene glycol monoudecyl etherundecyl ether. I'm not an industrial chemist and I don't know if this is the same chemical that we know as Polyethylene Glycol (PEG) that has been used previously for successfully stabilising timber and, as older Brits and Aussies will know, for preserving eggs etc during WW2, but at least it would appear to come from the same family.

I am not sure if other detergents use the same surfactant but it would seem possible and may suggest a reason that the LDD system works and, given the percentage used, why the amount of further dilution is critical.

It is of interest that elsewhere I discovered that dishwashing detergent for automatic machines uses a different type of surfactant to minimise frothing.

I have no idea of the age of the report.

The link to the report is:

formatting link
Regards Graeme

Reply to
Graeme Campbell
Loading thread data ...

Well, the decline in phosphate use has brought a number of new products to market. Most, as you have discovered, are alcohols (glycol is a double OH) of some size. They're reasonably inert, biologically speaking, which is why we use 'em, but the PEG polymer size used in wood preservation is 1000. Hand creams, cosmetics, and such use 50 and 100 a lot.

Lot of detergents of the hand type also feature glycerin, which, as Madge will tell you, keeps your hands from chapping.

The reason LDD works, in my opinion, is that none was ever required to fulfill the claims made for it. Placebo....

formatting link
f>

Reply to
George

This is something that we can agree on. I am constantly asked about "that soap thing for drying bowls" and finally have had enough of just telling them all of the vague and misleading things that have been mentioned about the use of LDD. This is why I started actually testing, in as much a scientific way as I am able without a highly controlled lab, a couple of different claims for it's use.

My tests (procedures, data and results) will be posted, for free, on the web so that anyone may reproduce the tests and possibly confirm, independently, the results without resorting to the vagaries of anecdotal "evidence". I am anticipating posting this in the mid-summer timeframe.

- Andrew

Reply to
AHilton

InspirePoint website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.