|
The development of
vegetable oil derivatives for a variety of uses such as comonomers
and reactive surfactants (surfmers) in emulsion polymerization
and reactive diluents for latexes are key targets of TRRG. As
comonomers, vegetable oil macromonomers (VOMMs) act as plasticizers
to facilitate film formation in latexes without requiring coalescing
solvents that constitute volatile organic compounds (VOCs).
Upon application, VOMMs transition from plasticizing monomer(s)
to reactive monomers therby increasing polymer performance via
auto-oxidative crosslinking over time. VOMM-based latexes have
been successfully incorporated into architectural coatings,
industrial coatings, and paper coatings.
TRRG has been able
to incorporate more than 50% VOMM into latexes. Research continues
to develop VOMM-based surfmers that offer the option of eliminating
surfactants from the latex formulations thereby improving their
moisture resistance. Reactive diluents with higher levels of
unsaturation have been designed for post-synthesis addition
to latexes where they impart property enhancements by chemically
combining with oxygen during film formation. VOMMs are also
under evaluation in ultraviolet (UV) curable materials as flexibility
enhancing coreactants.
|