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PPA - 7500 PHENALKAMINE EPOXY HARDENER
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Phenalkamine PPA - 7500 is Mannich base, a reaction product of distilled cashew nutshell liquid & polyamine. It is a very low viscosity curing agent, for epoxy resins specially developed for concrete primers & internal linings for Potable Water coatings. Formulator can develop epoxy systems which are VOC compliant i.e. solvent less or high solids epoxy coatings systems. In general, it shows ability to resist moisture while curing & exhibits rapid cure, even at low temperatures, similar to other phenalkamines.
 
Chemical Structure :
Features :
  • Very low viscosity
  • Solvent free
  • Good cure even at low temperatures & high humidity
  • Good chemical, solvent & water resistance
  • Very good compatibility with
    i) Epoxy resin based on bisphenol A
    ii) Epoxy resin based on bisphenol F
    iii) Epoxy resin based on phenolic novolacs
  • Non critical mixing ratio
  • Excellent curing under humid as well as damp conditions
  • Good adhesion to mechanically cleaned surfaces
  • Superior corrosion resistance
  • Very good flexibility
  • Workable pot lives at lower temperature
Applications :
  • Medium to high solid coatings
  • Flooring & construction
  • Marine & industrial maintenance coatings
  • Tank lining
  • Adhesives
  • Surface tolerant primers for metallic substrates
Typical Properties :
Sr. No.
Property Unit Specification
1 Appearance Visual Low Viscous Dark Brown Liquid
2 Colour Gardner 17 max
3 N.V.M. % Solvent free
4 Amine Value mg KOH / g 250 - 290
5 Viscosity @ 25° C cPs 500 - 1000
6 Density @ 25° C -- 0.97 - 0.99
7 Flash point (Closed cup) °C > 150
8 AHEW g/eq. 130
9 Recommended PHR (Liquid Epoxy Resin -190) -- 68.5
Curing Properties :
Formulation :  
Liquid epoxy resin (EEW -190) 60
Paladin PPA - 7500 40
Optimum curing schedule 7 days at 25° C
Gel time ( 100g @ 25° C ) mixing 35-45
B.K Drying Recorder, set time, (200 microns) 8 mil
(Liquid Epoxy resin EEW - 190)
@ 25° C 5 - 6 hrs
@ 5° C 28 - 32 hrs
@ 0° C -
Storage & Stability :
Hardener PPA-7500 should be stored in a cool dry place at 18 - 25 ° C in the sealed containers to achieve shelf life of minimum one year. Product can react with moisture& carbon dioxide in the air. This may result in increased viscosity & reduced activity.
Handling Precaution :
May be harmful if ingested or absorbed through the skin & can cause sensitization. Will cause severe inflammation in contact with eye & skin. Wash thoroughly after handling. Adequate ventilation is essential during application. Containers should be tightly closed when not in use or during transportation. Do not inhale mist or vapors. It is recommended to use gloves, safety glasses & protective clothing for safe handling.
First AID :
In case of
Inhalation : Remove to fresh air & give oxygen if breathing is difficult
Ingestion : Give plenty of water. Do not induce vomiting. Contact a physician
Contact with Eyes : Flush eyes with plenty of clean water for at least 15 minutes
Contact with skin : Immediately wash with mild soap & water.
 
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