UCI International Inc.
Biocid Trial:Time and Temprature test

Sample No. g / l Start pH 260° F, 1 Hr. 260° F, 2 Hr. 260° F, 3 Hr.
  1. – Biocid 0.3 2.91 3.93 5.84 7.43
  2. – Biocid 0.45 2.51 2.77 2.82 3.27
  3. – Biocid 0.6 2.36 2.61 2.72 3.16
  4. – Biocid 0.3 2.81 - - 3.66
  5. – Biocid 0.45 2.63 - - 3.17
  6. – Biocid 0.6 2.51 - - 2.98
Samples 1, 2 and 3 were sampled after each 1 hour at 260° F
Samples 4, 5 and 6 were run 3hours at 260°F and sampled.

These samples were only water and acid. No fabric or other chemistries were used.

Strength Comparisons:
  1. Sample #1 – weakest sample with highest start pH showed greatest strength degradation @ 3 hours @ 260ēC – still satisfactory @ 2 hours @ 260ēC.
  2. Sample #2 – very small change over 3 hours @ 260ēC.
  3. Sample #3 – less than 1 point change over 3 hours.
  4. Sample #4 – appears that method of testing affects end results – compare to sample #1 and note large difference in ending pH.
  5. Sample #5 – very similar to sample #2 – no change.
  6. Sample #6 – very similar to sample #3 – no change.
Conclusions:
1 None of the samples tested other than Sample #1 appears to exhibit any material change. It appears to be the function of Biocid strength being reduced too much and differences in test methods and time of tests.
  1. Stronger Biocid solutions exhibit increased pH stability over time when compared to Sample #1.
  2. Samples #1,2,3 represent between 4 and 5 hours in solution when cooling, opening of containers, checking pH, resealing of container, reheating to temperature is considered. Also, strength is further reduced due to vapor pressure of water, which also carries molecules of Biocid into the atmosphere.