Home Cosmetic Science Talk Formulating Preservative for bug food ‘Colloidal Oatmeal’…

  • Preservative for bug food ‘Colloidal Oatmeal’…

    Posted by Graillotion on December 11, 2020 at 5:33 am

    I try and stay away from ‘bug food’ in my products, but recently tried colloidal oatmeal, and for a guy whom is rarely impressed with hyped ingredients, this one caught my eye, and tantalized my fingertips.

    It really left my skin silky, even 8 hours after application.  Not claiming it did anything, just stating that for me, there was a textural enhancement on my skin.

    So here are some of the parameters.

    Due to B3 inclusion, I like to keep creams about 6.0 pH, which really throws a wrench into the preservative selection.  NOTE:  If all the good options require a lower pH, I can (for double the price) switch to a reduced nicotinic acid form of B3.  So if the best option requires lower pH, I am open to hearing your recommendations…just state the pH requirement.

    The other parameters are:  I prefer (for customer perception) to formulate without Parabens and formaldehyde-releasing preservatives.

    Currently I use Euxyl® PE 9010 and Phenethyl alcohol, and it would therefore be economical to reuse these products, and possibly add something to them.

    SIDEBAR:  I found that Colloidal oatmeal also upset the emulsifiers I was using.  Can anyone tell me why this would happen?  (I will make a more robust emulsifying package in the product that will contain the Colloidal Oatmeal.)  That package was Mont 202/GSC/Aristoflex AVC.
    Next package will contain some 165 :) 

    Graillotion replied 3 years, 11 months ago 2 Members · 4 Replies
  • 4 Replies
  • PhilGeis

    Member
    December 12, 2020 at 12:30 pm

    Preservation of products with “colloidal oatmeal”  is an experiment that requires preservative testing your confident. and prob a round or 2 including aged product before your coonfident.  Llook at the similar products on  the shelvees now.  You’ve phenoxyethyl alcohol - why add less effective phenethyl - unless its for rose odor?   Additions should be the more water soluble.  Check  micro content of you oarmeal.

  • Graillotion

    Member
    December 12, 2020 at 8:19 pm

    PhilGeis said:

    Preservation of products with “colloidal oatmeal”  is an experiment that requires preservative testing your confident. and prob a round or 2 including aged product before your coonfident.  Llook at the similar products on  the shelvees now.  You’ve phenoxyethyl alcohol - why add less effective phenethyl - unless its for rose odor?   Additions should be the more water soluble.  Check  micro content of you oarmeal.

    Thank you for your response @PhilGeis .

     I want to put my best foot forward before I test…so using the flawed logic of, the more components the better… Would you think Jeecide CAP-5, INCI: Phenoxyethanol (and) Caprylyl Glycol (and) Potassium Sorbate (and) Water (and) Hexylene Glycol, would be a good starting point?  I even thought about adding back Ethylhexylglycerin, so that I had everything the E 9010 had.  Again keeping in mind a pH of right around 6.0.

    I looked at one of the leading producers of oat products, and all of their sample formulas were using E 9010.  Not that their examples make it right, just my observation.

    I use the phenethyl for two reasons….yes I use rose absolute, and I feel this boosts the fragrance, but I was also under the impression that it did a better job on the head space than E 9010?  I might be wrong.  Since this is a cream, I thought headspace coverage would be important.

  • PhilGeis

    Member
    December 13, 2020 at 10:49 am

    Appreciate you challenge.  Assumje you’ve ruled out formaldehyde releasers (?).
    pH 6 isn’t great for sorbic acid, and benzoate might be a better choice if you can ,lower the pH.  Is 6 cast in stone?
    Suggest you start testing and see what breaks through.

  • Graillotion

    Member
    December 13, 2020 at 9:19 pm

    PhilGeis said:

    Appreciate you challenge.  Assumje you’ve ruled out formaldehyde releasers (?).
    pH 6 isn’t great for sorbic acid, and benzoate might be a better choice if you can ,lower the pH.  Is 6 cast in stone?
    Suggest you start testing and see what breaks through.

    Thank you @P@PhilGeis

    I am keeping the pH around 6 due to use of Nicotinamide, USP grade.  So I like to be a hair below 6 and above 5.5.

    Yes, I was trying to not use the F releasers.

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