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PPA - 7558 PHENALKAMINE EPOXY HARDENER
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Phenalkamine PPA - 7558 is Mannich base, a reaction product of distilled cashew nutshell liquid & polyamine. It is low viscosity curing agent for epoxy resins specially developed for concrete primers & potable water contact. Formulator can developed 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 & also exhibit rapid cure, even at low temperatures, similar to other phenalkamines.
 
Chemical Structure :
Features :
  • Low viscosity
  • Excellent rapid cure even at low temperature
  • 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 Reddish brown viscous liquid
2 Colour Gardner 17 max
3 N.V.M % Solvent free
4 Amine Value MgKOH / g 320 – 360
5 Viscosity @25° C cPs 500 - 2000
6 Density @25° C -- 0.97 – 0.99
7 Flash point (Closed cup) °C / °F 104 / 220
8 AHEW g / eq. 95
9 Recommended PHR (Liquid epoxy resin –190) ---- 50 - 65
 
Curing Properties :
Formulation
Liquid epoxy resin ( EEW-190 ) 100 100
Paladin PPA - 7558 50 65
Optimum curing schedule 7 days at 25° C
Gel time (100g @ 25° C) mixing 30 - 35 min 35 - 40 min
B.K Drying Recorder, set time, (200 microns) 8 mil
(Liquid Epoxy resin EEW - 190)
@ 25° C 10 - 12 hrs
@ 5° C 28 - 32 hrs
@ 0° C -
Storage & Stability :
Hardener PPA - 7558 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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