Re: HLB?

[Guest guest]

>Anyone know of a definitive HLB value for Oleamide DEA, or Cocamide

>DEA?

Per the Uniqema website

http://www.uniqema.com/Uniqema_ProductCatalogue/ProdCat/default.asp?Region=Ameri\

cas

MONAMID 1007 (mide DEA (and) Linoleamide DEA) HLB = 12.8

MONAMID 705 (Cocamide DEA) HLB = 13.5

Maurice

--------------------------------------------------------

Maurice O. Hevey

Convergent Cosmetics, Inc.

http://www.ConvergentCosmetics.com

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[Guest guest]

>

> >Anyone know of a definitive HLB value for Oleamide DEA, or

Cocamide

> >DEA?

>

> Per the Uniqema website

> http://www.uniqema.com/Uniqema_ProductCatalogue/ProdCat/default.asp?

Region=Americas

>

> MONAMID 1007 (mide DEA (and) Linoleamide DEA) HLB = 12.8

> MONAMID 705 (Cocamide DEA) HLB = 13.5

>

Thanks Maurice. Oleamide DEA I'll use 11, closer than my initial

guess of 8. The reason I wanted to know is that I am having stability

problems with a cream peroxide. It is losing viscosity with time, and

in some instances has started to " cream " , though the hydrogen

peroxide level is pretty constant, so I don't believe this is causing

a problem. The formula was customer supplied and I suspect the

emulsifier ratio to be incorrect:-

Cetearyl Alcohol 2.85%

Oleamide DEA 1.00%

Ceteareth 30 0.80%

Required HLB for cetearyl alcohol is 15.5. The above emulsifier combo

is 6.11 + 7.33 (assuming ceteareth 30 at 16.5, I can't find this

either?) = 13.44 Too Low. The Oleamide also thickens the product, so

I will be trying:

Cetearyl Alcohol 4.00%

Oleamide DEA 0.20%

Ceteareth 30 0.80%

Giving HLB of 2.2 + 13.2 = 15.4, about right. The increased cetearyl

alcohol will hopefully compensate for the reduction in Oleamide DEA

Roll on tomorrow!

Thanks again

Dave Eastham