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PPA - 7090

PHENALKAMINE EPOXY HARDENER

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Phenalkamine systems based on distilled CNSL shows intense yellowing during exterior exposure & as such has colour value very high on gardner scale. PPA - 7090 is phenalkamine developed to improve the yellowing factor, as well as to assist formulator to develop the lighter shades in epoxy phenalkamine systems.
 
Chemical Structure :
Features :
  • Excellent 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 surfaces
  • Superior corrosion resistance
  • Very good flexibility
  • Workable pot life
Applications :
  • Pipeline & Tank coatings
  • Adhesives
  • Surface tolerant primers for metallic substrate
  • Marine & Industrial coating
 
Typical Properties :
Sr. No.
Property Unit Typical properties
1 Appearance Visual Pale viscous liquid
2 Colour Gardner 10 Max
3 N.V.M. (1 hr @105° C) % Solvent free
4 Amine Value MgKOH / g 240 – 280
5 Viscosity @25° C cPs 75000 - 150000
6 Density @25° C Kg / ltr 0.98 - 1.00
7 Flash point °C / °F 205 / 401
8 AHEW (100 % solids) g / eq. 190
9 PHR (Liquid epoxy resin - EEW=190) -- 100
Curing Properties :
Formulation :  
Liquid epoxy resin ( EEW-190 ) 100
Paladin PPA - 7090 100
Optimum curing schedule 7 days at 25° C
Gel time (100g @ 25° C) mixing 30 - 40 min
B.K Drying Recorder, set time, (200 microns) 8 mil
(Liquid Epoxy resin EEW - 190)
@ 25° C 3 - 5 hrs
@ 5° C 20 - 24 hrs
@ 0° C -
Storage & Stability :
Hardener PPA - 7090 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 & reduce its 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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