Radical Polymers

- Model 611 - Differentiated Phosphinocarboxylic Acid (PCA)



INITIA 611 is a differentiated phosphinocarboxylic acid (PCA) dispersant for use in a wide range of applications. INITIA 611 is differentiated from traditional PCA polymers in that it is optimized with a higher level of phosphino functional groups.  These phosphino functional groups are the basis for improved efficacy and thermal stability versus more basic polyacrylic acids.   INITIA 611 is an exceptional inhibitor for calcium carbonate, calcium sulfate and barium sulfate scales.  Additionally, INITIA 611 is a highly effective dispersant and deposit control agent in boiler applications up to 500psi.  INITIA 611 meets the criteria of 21 CFR 173.310 for boiler applications where steam may contact food and is Kosher Certified.

typical properties

  • appearanceclear, yellow  liquid
  • total solid content49.0 -51.0 %
  • pH (as is)2.5 – 3.5
  • Brookfield viscosity at 25 °C100 – 600 cPs
  • density at 20 °C1.17 +/- 0.05 g/ml
  • solubility in watercomplete
  • residual monomer<0.1
  • specific gravity1.22-1.28

thermal stability

INITIA® 611 is an effective tool for use in boiler applications for iron transport, hydroxyapatite control, and general solids dispersion.  INITIA® 611 was evaluated using Thermogravimetric analysis (TGA) to demonstrate the thermal stability of the polymer. Figure 1 shows that INITIA® 611 substantially retains its integrity up to 240°C which equates to about 500 psi in boiler applications.   Additionally, INITIA® 611 was compared to a traditional PCA using Differential Scanning Calorimetry (DSC.)  DSC is a thermal analysis tool that measures heat changes (exotherms) that occur to the polymer during a controlled increase in temperature.   The DSC analysis depicted in Figure 2 shows that INITIA® 611 and the traditional PCA are virtually identical in their exothermic responses to increasing temperature with significant events occurring between ~210°C and 240°C for both polymers.

calcium carbonate and calcium sulfate inhibition

INITIA® 611 was evaluated versus traditional PCA using a modified NACE calcium carbonate test method  (Figure 3) and the standard NACE method for calcium sulfate (Figure 4) inhibition.  In both evaluations INITIA® 611 demonstrated comparative or better to the competitive PCA.

INITIA® 611 delivers…

  • high effective control of calcium carbonate scale
  • exceptional control of calcium and barium sulfate scales
  • effective dispersion of inorganic such as iron oxides, hydroxyapatite, and sludge
  • outstanding thermal and hydrolytic stability
  • stability to oxidizing biocides

suggested applications

  • cooling towers
  • boilers (up to 500 psi)
  • industrial reverse osmosis
  • mining
  • oilfield and natural gas
safety use and handling

Consult the Safety Data Sheet (SDS) for further information regarding the safe handling and use of INITIA® 611. This product should be stored in a cool/dry place and must be protected from freezing. Avoid storage at high temperatures (>90°F), direct sunlight, and exposure to surface, airborne or other common environmental contaminants such as debris, bacteria, yeast, and mold.

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