Use Of New Renewable Resource For Low VOC Enamel
samples with commercially available and
Sweet Sap as emulsifier, however, do not
show any visible flocculation.
In terms of stability with respect to
dispersion, it is observed that both the
sample kept at room temperature made
without emulsifier and Additive 1 have
full reversal of dispersion. The product
with Sweet Sap, however, shows very insignificant reversal. These are shown in
Figure 12.
Initiation of reversal happens after two
months for commercially available additives and without additive-based products.
Both the products show similar trends of
reversal pattern. The product with Sweet
Sap, however, shows significantly better
stability. The chronological change of reversal is depicted in Figure 13.
The reversal of grinding is also accompanied by a fall of viscosity which is
shown in Figure 14.
Evaluation In Alkyd Color Enamel –
Grey (Smoke Grey)
PSince pigment flocculation is a common phenomenon in shades with
multiple combinations of organic and
inorganic pigments, the performance
was evaluated in Grey (Smoke Grey).
The trial Sweet Sap in its two preserved
states (referred to as Trial 1 & Trial
2) was used to make two samples of
smoke grey and was compared against
commercially available additive based
smoke grey shade. After ten months of
storage it was observed (against initially stored color reference) that the standard product has undergone a complete
change of color, whereas the other two
samples made with trial Sweet Sap keep
their color intact!
Conclusion
•Newly found product has been
found to be better or comparable in
some aspects both in emulsion and
paint system.
• The term ‘new’ has been justified
from the FTIR analysis against mar-ket-available standards.
•The stability of the new re-
newable “Sweet Sap” after ten
months of preservation as shown
in FTIR analysis justifies the
claim of usability.
• The stability of the products made
with new renewable “Sweet Sap”
has also been studied and found to
be better or comparable against the
available standards.
• The new renewable “Sweet Sap” can
be commercially explored as an effective emulsifier for water in oil
system.
Acknowledgements
The authors would like to express their
gratitude to Mr. B. Bera, Sr. Vice President,
R&D for technical guidance and support
for this work. We also wish to thank Mr.
Tapan Dhar, and Mr. Soumitra Bakshi for
their input and continuous encouragement for completion of the project.
Special thanks are warranted to little-known Mr. Sujit Pakhira who helped
Figure 10: Study, in a measuring cylinder, of syneresis with time.
Figure 11: Snapshot of container opened after 96 hrs in an incubator.
Figure 12: Phiroza blue made with standard Additive 1 and without emulsifier shows significant reversal of
dispersion after 10 months of storage. The product with Sweet Sap as emulsifier, however, shows better
stability with very low extent of reversal.
