mineral oil hlb
There is a list of the HLB values for a. So they are more hydrophilic having V higher HLB values ranging from 96 to 167.
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Mineral oil can be administered either orally or as an enema.
. So youll pick a pair of emulsifiers one with an HLB higher than 10 and another with an HLB lower than 10. Rx HLB Mineral Oil 50 wv 12 Cetyl alcohol 1g 15 Emulsifier 5 wv Water qs ad 120mL a Determine the required HLB. Tweens are polyoxyethylene derivatives of spans.
12 Although it might not be used as much today as in the past it still remains a valuable time-tested tool used by formulators to select the best surfactants from the many hundreds available to emulsify oils. Required HLB for OilsLipids Almond Oil required HLB 6 Anhydrous Lanolin USP required HLB 10 Apricot Kernal Oil required HLB 7 Avocado Persea Gratissima Oil required HLB 7 Babassu Oil required HLB 8 Beeswax required HLB 12 Borage Borago Officinalis. Total required HLB number Mineral oil 946100 x 12 114 Wool fat 27100 x 10 03 Cetyl alcohol 27100 x 15 04 Total required HLB 121 This formulation requires an emulsifying agent blend of HLB 121 sorbitan monooleate 43 polyoxyethylene sorbitan monooleate 15.
2 calculated ideal RHLB of the oil phase is 1085. 90100 X 7 09 X 7 63 10100 X 155 01 X 155 155 The required HLB of our oil phase is the sum of these numbers or 785 Lets make the Oil Phase more complex. According to Griffin the amphiphilic molecule is the value obtained by dividing the weight percentage of the hydrophilic part by five.
A different RHLB is required to form an oil-in-water wo type emulsion with the same oil phase. Hlb number 68 results in the formation of a milky emulsion after vigorous agitation while hlb values in the range of 8 to 18 stabilize oil-in-water emulsions hlb number 810 results in the. HLB Range Application HLB Range Behavior when added to water 15 - 3 Defoamer stabilizer 1 - 4 Not dispersible.
The ratios of mineral oil and water are needed to specify first in order to know types of emulsifier you would like to get Winsor Type I or II or else. HLB values ranging from 18 to 86. Each RHLB value of oil components is found from literature.
For example mineral oil has an assigned RHLB value of 4 if a wo emulsion is desired and it has a value of 105 if an ow emulsion is desired. Necessary hydrophile-lipophilic balance RHLB. Griffin in the late 1940s the HLB System is one of the most successful strategies for developing stable emulsions.
Surfactants of intermediate values have HLB values of between 9 and 11. In this study the HLB of neem oil is 9 eugenol oil is 6 citronella oil 12 so the HLB mixture is 9. Surfactants with hlb values in the range of 4 to 8 usually stabilize water-in-oil emulsions hlb number 46 results in the formation of poor emulsion.
To calculate the required HLB of the Oil Phase we multiply the percentage of each oil in the Oil Phase by its respective required HLB and sum the results. When you combine them the average comes out around 10 The HLB system which works primarily for non-ionic emulsifiers has been around since 1954. Mineral oil is used as a laxative to alleviate constipation by retaining water in stool and the intestines.
Although generally considered safe as noted above there is a concern of mist inhalation leading to serious health conditions such as pneumonia. It is sometimes used as a lubricant in enema. The emulsion was stable in surfactant mixture with HLB 10 13.
Required HLB for OilsLipids Almond Oil required HLB 6 Anhydrous Lanolin USP required HLB 10 Apricot Kernal Oil required HLB 7 Avocado Persea Gratissima Oil required HLB 7 Babassu Oil required HLB 8 Beeswax required HLB 12 Borage Borago Officinalis Seed Oil required HLB 7 Brazil Nut Oil required HLB 8. This value is utilized in the HLB concept to prepare an emulsion by selecting an emulsifier that has the same or nearly the same HLB value as the RHLB of the oleaginous phase of the intended emulsion. Using equal volumes of heavy mineral oil and distilled water prepare 100 ml of an ow emulsion using a blend of nonionic surfactants Spans Tweens.
Surfactants may be anionic. Record the proportions and amounts of each surfactant you used. If a particular surfactant has an HLB value below 9 it is considered low and if the HLB value is above 11 it is considered high.
HLB is measured on a scale 0-20 with a few values higher than 20. There is a balance between hydrophilic and lipophilic. Wetting powders into oils use surfactants with HLBs of 7 to 9 making self emulsifying oils use surfactants with HLBs of 7 to 10 making oil-in-water emulsions use surfactant blends with HLBs of 8 to16 making detergent solutions use surfactants with HLBs of 13 to 15 for solubilizing oils micro-emulsifying into water use surfactant blends with HLBs of 13 to 18.
See below Before we label our variables we need to determine the mass of mineral oil used in the Rx. B Determine the amount of Tween 60 HLB149 and Span 60 47 required to reach this HLB. Because of the general utility of the HLB system many surfactants that are not ethoxylated or have other water-soluble groups have been added over the years by comparing their emulsification properties to surfactants with known HLBs.
Created by William C. Is required for the oil phase of an oil in water ow type emulsion. A specific HLB called.
A short summary of this paper. If youre trying to make a mineral oil emulsion for example the HLB for mineral oil is 10 he says. The oil phase is consisted of mineral oil rHLB 11 octyldodecyl myristate RHLB 75 Cetyl alcohol RHLB 155 and propylparaben.
In the 1970s the. 37 Full PDFs related to this paper. The seleted surfactant andor co-surfactant.
HLB values for both emulsions of type ow and wo can be empirically determined for many oils and fats. The average HLB required to make an oil in water emulsion of mineral oil is 12. Lets suppose that your oil phase contains.
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