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"SurfaTech Corporation"
  • SurfaTech Corporation
  •             2170 Luke Edwards Road
  •              Dacula, Ga. 30019
  •                 (678) 468-9315   (678) 442-9624 Fax
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CosmoSurftm Product Line
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    CosmoSurftm Esters
  •      Esters are a class of materials that contain two alkyl groups. They conform to the following structure;


  •                                                   R-C(O)-OR’



  •     These materials are commonly used in personal care products as oil phases. While water insoluble, they are more polar than hydrocarbon based oils. These materials are used as emollients, lubricants and sun care additives. Esters generally have a surface tension of around 32 dynes/cm2.
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Complex Esters
  • When esters are made from di-hydroxy compounds, tri-hydroxy compounds or tetra hydroxy compounds they are referred to as complex esters. Examples are:


  • Diester                  R-C(O)-O-(CH2CH2O)4C(O)-R
  •                                                   CosmoSurftm E-DT
        • INCI:  PEG-4 dicocoate and stearyl dimethicone
  •                                CAS: 69278-77-9
  •                                EINECS: 273-950-9



  • Triester                  CH3-CH2-C-(CH2OC(O)-R)3
      •                             CosmoSurftm E-T8
      •            INCI Names: Trimethylolpropane Tricaprate/tricarpylate
      •            CAS No.: 68130-52-9
      •            EINECS No.: 268-591-1
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Complex Esters

  • Tetraester                C-(CH2OC(O)-R)4
  •                                            CosmoSurf TME-P8
        • INCI:  Pentaerythrityl tertacaprate/tetracarpylate
  •                                CAS:  68441-68-9
  •                                EINECS: 270-474-3


  • Many other complex esters are possible. They result from modification of the fatty group, modification of the hydroxy compound or both. This chemistry is well understood and the platform from which new technology can be launched.
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Ester / Silicone Compositions
  • Complex esters in addition to being of interest themselves, have been found to have very interesting interactions with alkyl silicones resulting in modification of wetting, spreading, viscosity and gel formation. These very properties are of extreme interest to cosmetic formulators.


  • The CosmoSurf line of esters include the complex esters and alkyl silicone modifications which allow the formulator new flexibility in making products.
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Why Combine Esters and
Alkyl Dimethicone?
  • Organo-functional silicone compounds are amphillic materials. That is they have an oil soluble group and a silicone soluble group on the same molecule. While both groups are hydrophobic (water hating) they are not soluble as pure materials in each other, Oil soluble groups are oleophilic and silicone groups are siliphilic.



  • Alkyl silicones are soluble in esters. That is they form clear solutions. Despite this clarity, the concentration of the silicone is highest at the surface and in micelles. It is exactly this behavior that allows for the modification of esters by adding specific alkyl silicone compounds.
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Alkyl Dimethicone
  • Alkyl dimethicone compounds conform to the following structure:



  •                          CH3         CH3        CH3        CH3
  •                           |               |              |             |
  •                   CH3-Si-(- O—Si-)a—(O-Si -)b-O-Si-CH3
  •                           |               |              |             |
  •                           CH3         CH3       (CH2)c    CH3
  •                                                          |
  •                                                         CH3
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Alkyl Dimethicone

  • They contain silicone groups (red) and alkyl groups (green).



  •                           CH3        CH3         CH3       CH3
  •                             |            |               |             |
  •                   CH3-Si-(- O—Si-)a—(O-Si -)b-O-Si-CH3
  •                             |            |               |             |
  •                           CH3        CH3       (CH2)17    CH3
  •                                                          |
  •                                                         CH3



  • It is this dichotomy that makes them amphillic and of interest in modifying esters.
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     Concentration Effect
  • Alkyl Dimethicone compounds added at below their CMC


  • Lower surface tension
  • Imporve Slip
  • Improve play time
  • Improve spreadability
  • Alkyl Dimethicone compounds added at their CMC


  • Begin to form micelles
  • Increase viscosity
  • Increase play time
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   Concentration Effect
  • Alkyl Dimethicone compounds added at at higher levels


  • Provide gels


  • Liquify under pressure


  • Provide outstanding aesthetics.


  • Alkyl Dimethicone compounds offer a wide range of attributes.


  • Raw materials are known and registered


  • Ratios offer formulator maximum flexibility.


  • Ability to alter chemistry of silicone and ester offers possibility for unique products.
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   Concentration Effect
Below CMC


  • Clear low viscosity water-white Liquid


  • Dry Ester


  • Good Spread
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    Concentration Effect
Above CMC

  • Gel soft feel


  • Outstanding flow


  • Good Cushion
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       Concentration Effect
         Higher Concentration

  • Hard solid
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CosmoSurftm Product Line
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Product Name: CosmoSurf TM E-TD Series
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Product Name: CosmoSurf TM E-TC Series
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Product Name: CosmoSurf TM E-P8 Series
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Product Name: CosmoSurf TM E-T8 Series
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CosmoSurftm Esters


  • For More Information contact:


  •               Kevin@surfatech.com