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Polyamine Equivalent
 
PPA - 7125 (7085) PHENALKAMIDE (PHENALKAMINE MODIFIED WITH POLYAMIDE) EPOXY HARDENER
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Phenalkamide PPA - 7125 is a Mannich base reaction product. It shows rapid cure with workable pot life, superior corrosion resistant properties & adhesion to damp surfaces. It has light colour, superior colour stability & longer pot life to card phenol based Phenalkamines. It offers superior resistance to humidity, acids, alkali, water, solvents & various chemicals.
 
Chemical Structure :

R  = H, ALKYL, ARYL
R’ = MONOMERIC, DIMERIC OR POLYMER OF FATTY ACID 

Features :
  • Rapid cure even at low temperatures
  • Good chemical solvent & water resistance
  • Very good compatibility with
    I) Epoxy resin based on bis- phenol A
    ii) Epoxy resin based on bis- phenol F
    iii) Epoxy resin based on novolacs
    iv) Most of the organic solvents & their combinations
  • Non-critical mixing ratios
  • Excellent curing under humid & damp conditions
  • Good adhesion to mechanically cleaned, damp surfaces
  • Superior corrosion resistance
  • Very good flexibility
  • Workable pot life
  • Light colour
  • Colour stable on heat & U.V. exposure
Applications :
  • Solvent free, High solid coatings, Top coats
  • Pipeline & Tank coatings
  • Adhesives
  • Surface tolerant primers for metallic substrate
  • Marine, Protective & Industrial coatings
 
Typical Properties :
Sr. No.
Property Unit Specification
1 Appearance Visual Pale Yellow to Light Brown Viscous Liquid
2 Colour Gardner 11 max
3 N.V.M. % Solvent free
4 Amine Value Mg KOH / g 230 – 280
5 Viscosity @ 25° C cPs 40000 – 100000
6 Density @ 25° C g / cm3 0.98 – 1.00
7 Flash point (Closed cup) °C / °F 205 / 401
8 AHEW g / eq. 160
9 Recommended PHR (EEW –190) -- 84
 
Curing Properties :
Formulation
Liquid epoxy resin ( EEW-190 ) 100
Paladin PPA – 7125 85
Optimum curing schedule 7 days at 25° C
Gel time (100g @ 25° C) mixing 60 - 80 min
B.K Drying Recorder, set time, (200 microns) 8 mil
(Liquid Epoxy resin EEW - 190)
@ 25° C 5 - 6 hrs
@ 5° C 28 - 30 hrs
@ 0° C -
Storage & Stability :
Hardener PPA – 7125 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 vapours. 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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