Epoxy Diluents

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Why Diluents ?
Thats Why !!!!!!
2
Why Diluents ??

• High processing viscosities of unmodified liquid
  epoxy resin systems
• Impregnating and wetting properties are
  favourably influenced by reducing the viscosity
• Larger filler amounts may be used
• cheaper formulation
• reduce the possible development of heat and
  shrinkage upon cure
• Possible Disadvantages
• May sweat out of the binder system
• Reduced flexibility
• Influence the properties of the binder system
• Hardness
• Rate of cure
• Adhesion, Intercoat adhesion
• Chemical resistance

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Non-Reactive Diluents

• Alcohols
• Benzylalcohol
• Furfurylalcohol
• Nonyl phenol
• Acceleration effect
• Phthalates
• Dibutylphthalate
• Hydrocarbon Resins
• Necirez-products
• Epodil-L
• Pine-oil

4
Reactive Diluents

• Polypropylene glycol diepoxides
• D.E.R. 732P liquid epoxy resin
• D.E.R. 736P liquid epoxy resin

• Alcoholglycidylethers esters mono- or
  multi-functional
• EMS Grilonit
• Prümmer Polypox
• Resolution Heloxy, Cardura E-10
• Air Products Epodil
• Etc

Trademark of The Dow Chemical Company
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Reactive Diluents
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Viscosity Cutting Powder
p-tert. BP GE R 7
BDDGE, o-CGE, HDDGE R 3, 6, 18
C12-C14 AGE R 24
2-EH GE R 17
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General Observations

• The addition of reactive diluents might have the
  following effects
• reduced viscosity,
• changed surface tension wetting, air-release
  etc. ,
• changed reactivity, especially for the
  mono-functional reactive diluents,
• changed solvent resistance,
• changed physical strength,
• changed linear coefficient of expansion,
• changed flexibility / impact resistance,
• changed abrasion resistance
• ......

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Reactive Diluents used by Dow

• o-Cresyl Glycidyl ether
• C12 - C14 alkyl Glycidyl ether
• Hexane diol di Glycidyl ether
• Compromise between Environmental, Hygiene
  Safety aspects and performance.

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o-Cresyl Glycidyl ether

• Typical properties
• EEW 180 g/eq
• Viscosity 7 mPa.s _at_ 25 C

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Hexane Diol Di Glycidyl ether
Typical properties EEW 142 g/eq Viscosity 14
mPa.s _at_ 25 C Total Chlorine ca 4 wt
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C12 - C14 Alkyl Glycidyl Ether
Typical properties EEW 280 g/eq Viscosity 7
mPa.s _at_ 25 C Total Chlorine ca 3 wt Remark
FDA approved for food contact applications
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Viscosity Cutting Power
Trademark of The Dow Chemical Company
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Influence on the chemical resistance
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Chemical Resistance
Trademark of The Dow Chemical Company
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Enough Chemistry !